// Constants
const SENSITIVE_INPUT_CLASS = "sensitive-input";
const ARRAY_ITEM_CLASS = "array-item";
const ARRAY_INPUT_CLASS = "array-input";
const MAP_ITEM_CLASS = "map-item";
const MAP_KEY_INPUT_CLASS = "map-key-input";
const MAP_VALUE_INPUT_CLASS = "map-value-input";
const SAFETY_SETTING_ITEM_CLASS = "safety-setting-item";
const SHOW_CLASS = "show"; // For modals
const API_KEY_REGEX = /AIzaSy\S{33}/g;
const PROXY_REGEX =
  /(?:https?|socks5):\/\/(?:[^:@\/]+(?::[^@\/]+)?@)?(?:[^:\/\s]+)(?::\d+)?/g;
const VERTEX_API_KEY_REGEX = /AQ\.[a-zA-Z0-9_]{50}/g; // 新增 Vertex API Key 正则
const MASKED_VALUE = "••••••••";

// DOM Elements - Global Scope for frequently accessed elements
const safetySettingsContainer = document.getElementById(
  "SAFETY_SETTINGS_container"
);
const thinkingModelsContainer = document.getElementById(
  "THINKING_MODELS_container"
);
const apiKeyModal = document.getElementById("apiKeyModal");
const apiKeyBulkInput = document.getElementById("apiKeyBulkInput");
const apiKeySearchInput = document.getElementById("apiKeySearchInput");
const bulkDeleteApiKeyModal = document.getElementById("bulkDeleteApiKeyModal");
const bulkDeleteApiKeyInput = document.getElementById("bulkDeleteApiKeyInput");
const proxyModal = document.getElementById("proxyModal");
const proxyBulkInput = document.getElementById("proxyBulkInput");
const bulkDeleteProxyModal = document.getElementById("bulkDeleteProxyModal");
const bulkDeleteProxyInput = document.getElementById("bulkDeleteProxyInput");
const resetConfirmModal = document.getElementById("resetConfirmModal");
const configForm = document.getElementById("configForm"); // Added for frequent use

// Vertex API Key Modal Elements
const vertexApiKeyModal = document.getElementById("vertexApiKeyModal");
const vertexApiKeyBulkInput = document.getElementById("vertexApiKeyBulkInput");
const bulkDeleteVertexApiKeyModal = document.getElementById(
  "bulkDeleteVertexApiKeyModal"
);
const bulkDeleteVertexApiKeyInput = document.getElementById(
  "bulkDeleteVertexApiKeyInput"
);

// Model Helper Modal Elements
const modelHelperModal = document.getElementById("modelHelperModal");
const modelHelperTitleElement = document.getElementById("modelHelperTitle");
const modelHelperSearchInput = document.getElementById(
  "modelHelperSearchInput"
);
const modelHelperListContainer = document.getElementById(
  "modelHelperListContainer"
);
const closeModelHelperModalBtn = document.getElementById(
  "closeModelHelperModalBtn"
);
const cancelModelHelperBtn = document.getElementById("cancelModelHelperBtn");

let cachedModelsList = null;
let currentModelHelperTarget = null; // { type: 'input'/'array', target: elementOrIdOrKey }

// Modal Control Functions
function openModal(modalElement) {
  if (modalElement) {
    modalElement.classList.add(SHOW_CLASS);
  }
}

function closeModal(modalElement) {
  if (modalElement) {
    modalElement.classList.remove(SHOW_CLASS);
  }
}

document.addEventListener("DOMContentLoaded", function () {
  // Initialize configuration
  initConfig();

  // Tab switching
  const tabButtons = document.querySelectorAll(".tab-btn");
  tabButtons.forEach((button) => {
    button.addEventListener("click", function (e) {
      e.stopPropagation();
      const tabId = this.getAttribute("data-tab");
      switchTab(tabId);
    });
  });

  // Upload provider switching
  const uploadProviderSelect = document.getElementById("UPLOAD_PROVIDER");
  if (uploadProviderSelect) {
    uploadProviderSelect.addEventListener("change", function () {
      toggleProviderConfig(this.value);
    });
  }

  // Toggle switch events
  const toggleSwitches = document.querySelectorAll(".toggle-switch");
  toggleSwitches.forEach((toggleSwitch) => {
    toggleSwitch.addEventListener("click", function (e) {
      e.stopPropagation();
      const checkbox = this.querySelector('input[type="checkbox"]');
      if (checkbox) {
        checkbox.checked = !checkbox.checked;
      }
    });
  });

  // Save button
  const saveBtn = document.getElementById("saveBtn");
  if (saveBtn) {
    saveBtn.addEventListener("click", saveConfig);
  }

  // Reset button
  const resetBtn = document.getElementById("resetBtn");
  if (resetBtn) {
    resetBtn.addEventListener("click", resetConfig); // resetConfig will open the modal
  }

  // Scroll buttons
  window.addEventListener("scroll", toggleScrollButtons);

  // API Key Modal Elements and Events
  const addApiKeyBtn = document.getElementById("addApiKeyBtn");
  const closeApiKeyModalBtn = document.getElementById("closeApiKeyModalBtn");
  const cancelAddApiKeyBtn = document.getElementById("cancelAddApiKeyBtn");
  const confirmAddApiKeyBtn = document.getElementById("confirmAddApiKeyBtn");

  if (addApiKeyBtn) {
    addApiKeyBtn.addEventListener("click", () => {
      openModal(apiKeyModal);
      if (apiKeyBulkInput) apiKeyBulkInput.value = "";
    });
  }
  if (closeApiKeyModalBtn)
    closeApiKeyModalBtn.addEventListener("click", () =>
      closeModal(apiKeyModal)
    );
  if (cancelAddApiKeyBtn)
    cancelAddApiKeyBtn.addEventListener("click", () => closeModal(apiKeyModal));
  if (confirmAddApiKeyBtn)
    confirmAddApiKeyBtn.addEventListener("click", handleBulkAddApiKeys);
  if (apiKeySearchInput)
    apiKeySearchInput.addEventListener("input", handleApiKeySearch);

  // Bulk Delete API Key Modal Elements and Events
  const bulkDeleteApiKeyBtn = document.getElementById("bulkDeleteApiKeyBtn");
  const closeBulkDeleteModalBtn = document.getElementById(
    "closeBulkDeleteModalBtn"
  );
  const cancelBulkDeleteApiKeyBtn = document.getElementById(
    "cancelBulkDeleteApiKeyBtn"
  );
  const confirmBulkDeleteApiKeyBtn = document.getElementById(
    "confirmBulkDeleteApiKeyBtn"
  );

  if (bulkDeleteApiKeyBtn) {
    bulkDeleteApiKeyBtn.addEventListener("click", () => {
      openModal(bulkDeleteApiKeyModal);
      if (bulkDeleteApiKeyInput) bulkDeleteApiKeyInput.value = "";
    });
  }
  if (closeBulkDeleteModalBtn)
    closeBulkDeleteModalBtn.addEventListener("click", () =>
      closeModal(bulkDeleteApiKeyModal)
    );
  if (cancelBulkDeleteApiKeyBtn)
    cancelBulkDeleteApiKeyBtn.addEventListener("click", () =>
      closeModal(bulkDeleteApiKeyModal)
    );
  if (confirmBulkDeleteApiKeyBtn)
    confirmBulkDeleteApiKeyBtn.addEventListener(
      "click",
      handleBulkDeleteApiKeys
    );

  // Proxy Modal Elements and Events
  const addProxyBtn = document.getElementById("addProxyBtn");
  const closeProxyModalBtn = document.getElementById("closeProxyModalBtn");
  const cancelAddProxyBtn = document.getElementById("cancelAddProxyBtn");
  const confirmAddProxyBtn = document.getElementById("confirmAddProxyBtn");

  if (addProxyBtn) {
    addProxyBtn.addEventListener("click", () => {
      openModal(proxyModal);
      if (proxyBulkInput) proxyBulkInput.value = "";
    });
  }
  if (closeProxyModalBtn)
    closeProxyModalBtn.addEventListener("click", () => closeModal(proxyModal));
  if (cancelAddProxyBtn)
    cancelAddProxyBtn.addEventListener("click", () => closeModal(proxyModal));
  if (confirmAddProxyBtn)
    confirmAddProxyBtn.addEventListener("click", handleBulkAddProxies);

  // Bulk Delete Proxy Modal Elements and Events
  const bulkDeleteProxyBtn = document.getElementById("bulkDeleteProxyBtn");
  const closeBulkDeleteProxyModalBtn = document.getElementById(
    "closeBulkDeleteProxyModalBtn"
  );
  const cancelBulkDeleteProxyBtn = document.getElementById(
    "cancelBulkDeleteProxyBtn"
  );
  const confirmBulkDeleteProxyBtn = document.getElementById(
    "confirmBulkDeleteProxyBtn"
  );

  if (bulkDeleteProxyBtn) {
    bulkDeleteProxyBtn.addEventListener("click", () => {
      openModal(bulkDeleteProxyModal);
      if (bulkDeleteProxyInput) bulkDeleteProxyInput.value = "";
    });
  }
  if (closeBulkDeleteProxyModalBtn)
    closeBulkDeleteProxyModalBtn.addEventListener("click", () =>
      closeModal(bulkDeleteProxyModal)
    );
  if (cancelBulkDeleteProxyBtn)
    cancelBulkDeleteProxyBtn.addEventListener("click", () =>
      closeModal(bulkDeleteProxyModal)
    );
  if (confirmBulkDeleteProxyBtn)
    confirmBulkDeleteProxyBtn.addEventListener(
      "click",
      handleBulkDeleteProxies
    );

  // Reset Confirmation Modal Elements and Events
  const closeResetModalBtn = document.getElementById("closeResetModalBtn");
  const cancelResetBtn = document.getElementById("cancelResetBtn");
  const confirmResetBtn = document.getElementById("confirmResetBtn");

  if (closeResetModalBtn)
    closeResetModalBtn.addEventListener("click", () =>
      closeModal(resetConfirmModal)
    );
  if (cancelResetBtn)
    cancelResetBtn.addEventListener("click", () =>
      closeModal(resetConfirmModal)
    );
  if (confirmResetBtn) {
    confirmResetBtn.addEventListener("click", () => {
      closeModal(resetConfirmModal);
      executeReset();
    });
  }

  // Click outside modal to close
  window.addEventListener("click", (event) => {
    const modals = [
      apiKeyModal,
      resetConfirmModal,
      bulkDeleteApiKeyModal,
      proxyModal,
      bulkDeleteProxyModal,
      vertexApiKeyModal, // 新增
      bulkDeleteVertexApiKeyModal, // 新增
      modelHelperModal,
    ];
    modals.forEach((modal) => {
      if (event.target === modal) {
        closeModal(modal);
      }
    });
  });

  // Removed static token generation button event listener, now handled dynamically if needed or by specific buttons.

  // Authentication token generation button
  const generateAuthTokenBtn = document.getElementById("generateAuthTokenBtn");
  const authTokenInput = document.getElementById("AUTH_TOKEN");
  if (generateAuthTokenBtn && authTokenInput) {
    generateAuthTokenBtn.addEventListener("click", function () {
      const newToken = generateRandomToken(); // Assuming generateRandomToken is defined elsewhere
      authTokenInput.value = newToken;
      if (authTokenInput.classList.contains(SENSITIVE_INPUT_CLASS)) {
        const event = new Event("focusout", {
          bubbles: true,
          cancelable: true,
        });
        authTokenInput.dispatchEvent(event);
      }
      showNotification("已生成新认证令牌", "success");
    });
  }

  // Event delegation for THINKING_MODELS input changes to update budget map keys
  if (thinkingModelsContainer) {
    thinkingModelsContainer.addEventListener("input", function (event) {
      const target = event.target;
      if (
        target &&
        target.classList.contains(ARRAY_INPUT_CLASS) &&
        target.closest(`.${ARRAY_ITEM_CLASS}[data-model-id]`)
      ) {
        const modelInput = target;
        const modelItem = modelInput.closest(`.${ARRAY_ITEM_CLASS}`);
        const modelId = modelItem.getAttribute("data-model-id");
        const budgetKeyInput = document.querySelector(
          `.${MAP_KEY_INPUT_CLASS}[data-model-id="${modelId}"]`
        );
        if (budgetKeyInput) {
          budgetKeyInput.value = modelInput.value;
        }
      }
    });
  }

  // Event delegation for dynamically added remove buttons and generate token buttons within array items
  if (configForm) {
    // Ensure configForm exists before adding event listener
    configForm.addEventListener("click", function (event) {
      const target = event.target;
      const removeButton = target.closest(".remove-btn");
      const generateButton = target.closest(".generate-btn");

      if (removeButton && removeButton.closest(`.${ARRAY_ITEM_CLASS}`)) {
        const arrayItem = removeButton.closest(`.${ARRAY_ITEM_CLASS}`);
        const parentContainer = arrayItem.parentElement;
        const isThinkingModelItem =
          arrayItem.hasAttribute("data-model-id") &&
          parentContainer &&
          parentContainer.id === "THINKING_MODELS_container";
        const isSafetySettingItem = arrayItem.classList.contains(
          SAFETY_SETTING_ITEM_CLASS
        );

        if (isThinkingModelItem) {
          const modelId = arrayItem.getAttribute("data-model-id");
          const budgetMapItem = document.querySelector(
            `.${MAP_ITEM_CLASS}[data-model-id="${modelId}"]`
          );
          if (budgetMapItem) {
            budgetMapItem.remove();
          }
          // Check and add placeholder for budget map if empty
          const budgetContainer = document.getElementById(
            "THINKING_BUDGET_MAP_container"
          );
          if (budgetContainer && budgetContainer.children.length === 0) {
            budgetContainer.innerHTML =
              '<div class="text-gray-500 text-sm italic">请在上方添加思考模型，预算将自动关联。</div>';
          }
        }
        arrayItem.remove();
        // Check and add placeholder for safety settings if empty
        if (
          isSafetySettingItem &&
          parentContainer &&
          parentContainer.children.length === 0
        ) {
          parentContainer.innerHTML =
            '<div class="text-gray-500 text-sm italic">定义模型的安全过滤阈值。</div>';
        }
      } else if (
        generateButton &&
        generateButton.closest(`.${ARRAY_ITEM_CLASS}`)
      ) {
        const inputField = generateButton
          .closest(`.${ARRAY_ITEM_CLASS}`)
          .querySelector(`.${ARRAY_INPUT_CLASS}`);
        if (inputField) {
          const newToken = generateRandomToken();
          inputField.value = newToken;
          if (inputField.classList.contains(SENSITIVE_INPUT_CLASS)) {
            const event = new Event("focusout", {
              bubbles: true,
              cancelable: true,
            });
            inputField.dispatchEvent(event);
          }
          showNotification("已生成新令牌", "success");
        }
      }
    });
  }

  // Add Safety Setting button
  const addSafetySettingBtn = document.getElementById("addSafetySettingBtn");
  if (addSafetySettingBtn) {
    addSafetySettingBtn.addEventListener("click", () => addSafetySettingItem());
  }

  initializeSensitiveFields(); // Initialize sensitive field handling

  // Vertex API Key Modal Elements and Events
  const addVertexApiKeyBtn = document.getElementById("addVertexApiKeyBtn");
  const closeVertexApiKeyModalBtn = document.getElementById(
    "closeVertexApiKeyModalBtn"
  );
  const cancelAddVertexApiKeyBtn = document.getElementById(
    "cancelAddVertexApiKeyBtn"
  );
  const confirmAddVertexApiKeyBtn = document.getElementById(
    "confirmAddVertexApiKeyBtn"
  );
  const bulkDeleteVertexApiKeyBtn = document.getElementById(
    "bulkDeleteVertexApiKeyBtn"
  );
  const closeBulkDeleteVertexModalBtn = document.getElementById(
    "closeBulkDeleteVertexModalBtn"
  );
  const cancelBulkDeleteVertexApiKeyBtn = document.getElementById(
    "cancelBulkDeleteVertexApiKeyBtn"
  );
  const confirmBulkDeleteVertexApiKeyBtn = document.getElementById(
    "confirmBulkDeleteVertexApiKeyBtn"
  );

  if (addVertexApiKeyBtn) {
    addVertexApiKeyBtn.addEventListener("click", () => {
      openModal(vertexApiKeyModal);
      if (vertexApiKeyBulkInput) vertexApiKeyBulkInput.value = "";
    });
  }
  if (closeVertexApiKeyModalBtn)
    closeVertexApiKeyModalBtn.addEventListener("click", () =>
      closeModal(vertexApiKeyModal)
    );
  if (cancelAddVertexApiKeyBtn)
    cancelAddVertexApiKeyBtn.addEventListener("click", () =>
      closeModal(vertexApiKeyModal)
    );
  if (confirmAddVertexApiKeyBtn)
    confirmAddVertexApiKeyBtn.addEventListener(
      "click",
      handleBulkAddVertexApiKeys
    );

  if (bulkDeleteVertexApiKeyBtn) {
    bulkDeleteVertexApiKeyBtn.addEventListener("click", () => {
      openModal(bulkDeleteVertexApiKeyModal);
      if (bulkDeleteVertexApiKeyInput) bulkDeleteVertexApiKeyInput.value = "";
    });
  }
  if (closeBulkDeleteVertexModalBtn)
    closeBulkDeleteVertexModalBtn.addEventListener("click", () =>
      closeModal(bulkDeleteVertexApiKeyModal)
    );
  if (cancelBulkDeleteVertexApiKeyBtn)
    cancelBulkDeleteVertexApiKeyBtn.addEventListener("click", () =>
      closeModal(bulkDeleteVertexApiKeyModal)
    );
  if (confirmBulkDeleteVertexApiKeyBtn)
    confirmBulkDeleteVertexApiKeyBtn.addEventListener(
      "click",
      handleBulkDeleteVertexApiKeys
    );

  // Model Helper Modal Event Listeners
  if (closeModelHelperModalBtn) {
    closeModelHelperModalBtn.addEventListener("click", () =>
      closeModal(modelHelperModal)
    );
  }
  if (cancelModelHelperBtn) {
    cancelModelHelperBtn.addEventListener("click", () =>
      closeModal(modelHelperModal)
    );
  }
  if (modelHelperSearchInput) {
    modelHelperSearchInput.addEventListener("input", () =>
      renderModelsInModal()
    );
  }

  // Add event listeners to all model helper trigger buttons
  const modelHelperTriggerBtns = document.querySelectorAll(
    ".model-helper-trigger-btn"
  );
  modelHelperTriggerBtns.forEach((btn) => {
    btn.addEventListener("click", () => {
      const targetInputId = btn.dataset.targetInputId;
      const targetArrayKey = btn.dataset.targetArrayKey;

      if (targetInputId) {
        currentModelHelperTarget = {
          type: "input",
          target: document.getElementById(targetInputId),
        };
      } else if (targetArrayKey) {
        currentModelHelperTarget = { type: "array", targetKey: targetArrayKey };
      }
      openModelHelperModal();
    });
  });
}); // <-- DOMContentLoaded end

/**
 * Initializes sensitive input field behavior (masking/unmasking).
 */
function initializeSensitiveFields() {
  if (!configForm) return;

  // Helper function: Mask field
  function maskField(field) {
    if (field.value && field.value !== MASKED_VALUE) {
      field.setAttribute("data-real-value", field.value);
      field.value = MASKED_VALUE;
    } else if (!field.value) {
      // If field value is empty string
      field.removeAttribute("data-real-value");
      // Ensure empty value doesn't show as asterisks
      if (field.value === MASKED_VALUE) field.value = "";
    }
  }

  // Helper function: Unmask field
  function unmaskField(field) {
    if (field.hasAttribute("data-real-value")) {
      field.value = field.getAttribute("data-real-value");
    }
    // If no data-real-value and value is MASKED_VALUE, it might be an initial empty sensitive field, clear it
    else if (
      field.value === MASKED_VALUE &&
      !field.hasAttribute("data-real-value")
    ) {
      field.value = "";
    }
  }

  // Initial masking for existing sensitive fields on page load
  // This function is called after populateForm and after dynamic element additions (via event delegation)
  function initialMaskAllExisting() {
    const sensitiveFields = configForm.querySelectorAll(
      `.${SENSITIVE_INPUT_CLASS}`
    );
    sensitiveFields.forEach((field) => {
      if (field.type === "password") {
        // For password fields, browser handles it. We just ensure data-original-type is set
        // and if it has a value, we also store data-real-value so it can be shown when switched to text
        if (field.value) {
          field.setAttribute("data-real-value", field.value);
        }
        // No need to set to MASKED_VALUE as browser handles it.
      } else if (
        field.type === "text" ||
        field.tagName.toLowerCase() === "textarea"
      ) {
        maskField(field);
      }
    });
  }
  initialMaskAllExisting();

  // Event delegation for dynamic and static fields
  configForm.addEventListener("focusin", function (event) {
    const target = event.target;
    if (target.classList.contains(SENSITIVE_INPUT_CLASS)) {
      if (target.type === "password") {
        // Record original type to switch back on blur
        if (!target.hasAttribute("data-original-type")) {
          target.setAttribute("data-original-type", "password");
        }
        target.type = "text"; // Switch to text type to show content
        // If data-real-value exists (e.g., set during populateForm), use it
        if (target.hasAttribute("data-real-value")) {
          target.value = target.getAttribute("data-real-value");
        }
        // Otherwise, the browser's existing password value will be shown directly
      } else {
        // For type="text" or textarea
        unmaskField(target);
      }
    }
  });

  configForm.addEventListener("focusout", function (event) {
    const target = event.target;
    if (target.classList.contains(SENSITIVE_INPUT_CLASS)) {
      // First, if the field is currently text and has a value, update data-real-value
      if (
        target.type === "text" ||
        target.tagName.toLowerCase() === "textarea"
      ) {
        if (target.value && target.value !== MASKED_VALUE) {
          target.setAttribute("data-real-value", target.value);
        } else if (!target.value) {
          // If value is empty, remove data-real-value
          target.removeAttribute("data-real-value");
        }
      }

      // Then handle type switching and masking
      if (
        target.getAttribute("data-original-type") === "password" &&
        target.type === "text"
      ) {
        target.type = "password"; // Switch back to password type
        // For password type, browser handles masking automatically, no need to set MASKED_VALUE manually
        // data-real-value has already been updated by the logic above
      } else if (
        target.type === "text" ||
        target.tagName.toLowerCase() === "textarea"
      ) {
        // For text or textarea sensitive fields, perform masking
        maskField(target);
      }
    }
  });
}

/**
 * Generates a UUID.
 * @returns {string} A new UUID.
 */
function generateUUID() {
  return "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function (c) {
    var r = (Math.random() * 16) | 0,
      v = c == "x" ? r : (r & 0x3) | 0x8;
    return v.toString(16);
  });
}

/**
 * Initializes the configuration by fetching it from the server and populating the form.
 */
async function initConfig() {
  try {
    showNotification("正在加载配置...", "info");
    const response = await fetch("/api/config");

    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }

    const config = await response.json();

    // 确保数组字段有默认值
    if (
      !config.API_KEYS ||
      !Array.isArray(config.API_KEYS) ||
      config.API_KEYS.length === 0
    ) {
      config.API_KEYS = ["请在此处输入 API 密钥"];
    }

    if (
      !config.ALLOWED_TOKENS ||
      !Array.isArray(config.ALLOWED_TOKENS) ||
      config.ALLOWED_TOKENS.length === 0
    ) {
      config.ALLOWED_TOKENS = [""];
    }

    if (
      !config.IMAGE_MODELS ||
      !Array.isArray(config.IMAGE_MODELS) ||
      config.IMAGE_MODELS.length === 0
    ) {
      config.IMAGE_MODELS = ["gemini-1.5-pro-latest"];
    }

    if (
      !config.SEARCH_MODELS ||
      !Array.isArray(config.SEARCH_MODELS) ||
      config.SEARCH_MODELS.length === 0
    ) {
      config.SEARCH_MODELS = ["gemini-1.5-flash-latest"];
    }

    if (
      !config.FILTERED_MODELS ||
      !Array.isArray(config.FILTERED_MODELS) ||
      config.FILTERED_MODELS.length === 0
    ) {
      config.FILTERED_MODELS = ["gemini-1.0-pro-latest"];
    }
    // --- 新增：处理 VERTEX_API_KEYS 默认值 ---
    if (!config.VERTEX_API_KEYS || !Array.isArray(config.VERTEX_API_KEYS)) {
      config.VERTEX_API_KEYS = [];
    }
    // --- 新增：处理 VERTEX_EXPRESS_BASE_URL 默认值 ---
    if (typeof config.VERTEX_EXPRESS_BASE_URL === "undefined") {
      config.VERTEX_EXPRESS_BASE_URL = "";
    }
    // --- 新增：处理 PROXIES 默认值 ---
    if (!config.PROXIES || !Array.isArray(config.PROXIES)) {
      config.PROXIES = []; // 默认为空数组
    }
    // --- 新增：处理新字段的默认值 ---
    if (!config.THINKING_MODELS || !Array.isArray(config.THINKING_MODELS)) {
      config.THINKING_MODELS = []; // 默认为空数组
    }
    if (
      !config.THINKING_BUDGET_MAP ||
      typeof config.THINKING_BUDGET_MAP !== "object" ||
      config.THINKING_BUDGET_MAP === null
    ) {
      config.THINKING_BUDGET_MAP = {}; // 默认为空对象
    }
    // --- 新增：处理 SAFETY_SETTINGS 默认值 ---
    if (!config.SAFETY_SETTINGS || !Array.isArray(config.SAFETY_SETTINGS)) {
      config.SAFETY_SETTINGS = []; // 默认为空数组
    }
    // --- 结束：处理 SAFETY_SETTINGS 默认值 ---

    // --- 新增：处理自动删除错误日志配置的默认值 ---
    if (typeof config.AUTO_DELETE_ERROR_LOGS_ENABLED === "undefined") {
      config.AUTO_DELETE_ERROR_LOGS_ENABLED = false;
    }
    if (typeof config.AUTO_DELETE_ERROR_LOGS_DAYS === "undefined") {
      config.AUTO_DELETE_ERROR_LOGS_DAYS = 7;
    }
    // --- 结束：处理自动删除错误日志配置的默认值 ---

    // --- 新增：处理自动删除请求日志配置的默认值 ---
    if (typeof config.AUTO_DELETE_REQUEST_LOGS_ENABLED === "undefined") {
      config.AUTO_DELETE_REQUEST_LOGS_ENABLED = false;
    }
    if (typeof config.AUTO_DELETE_REQUEST_LOGS_DAYS === "undefined") {
      config.AUTO_DELETE_REQUEST_LOGS_DAYS = 30;
    }
    // --- 结束：处理自动删除请求日志配置的默认值 ---

    // --- 新增：处理假流式配置的默认值 ---
    if (typeof config.FAKE_STREAM_ENABLED === "undefined") {
      config.FAKE_STREAM_ENABLED = false;
    }
    if (typeof config.FAKE_STREAM_EMPTY_DATA_INTERVAL_SECONDS === "undefined") {
      config.FAKE_STREAM_EMPTY_DATA_INTERVAL_SECONDS = 5;
    }
    // --- 结束：处理假流式配置的默认值 ---

    populateForm(config);
    // After populateForm, initialize masking for all populated sensitive fields
    if (configForm) {
      // Ensure form exists
      initializeSensitiveFields(); // Call initializeSensitiveFields to handle initial masking
    }

    // Ensure upload provider has a default value
    const uploadProvider = document.getElementById("UPLOAD_PROVIDER");
    if (uploadProvider && !uploadProvider.value) {
      uploadProvider.value = "smms"; // 设置默认值为 smms
      toggleProviderConfig("smms");
    }

    showNotification("配置加载成功", "success");
  } catch (error) {
    console.error("加载配置失败:", error);
    showNotification("加载配置失败: " + error.message, "error");

    // 加载失败时，使用默认配置
    const defaultConfig = {
      API_KEYS: [""],
      ALLOWED_TOKENS: [""],
      IMAGE_MODELS: ["gemini-1.5-pro-latest"],
      SEARCH_MODELS: ["gemini-1.5-flash-latest"],
      FILTERED_MODELS: ["gemini-1.0-pro-latest"],
      UPLOAD_PROVIDER: "smms",
      PROXIES: [],
      VERTEX_API_KEYS: [], // 确保默认值存在
      VERTEX_EXPRESS_BASE_URL: "", // 确保默认值存在
      THINKING_MODELS: [],
      THINKING_BUDGET_MAP: {},
      AUTO_DELETE_ERROR_LOGS_ENABLED: false,
      AUTO_DELETE_ERROR_LOGS_DAYS: 7, // 新增默认值
      AUTO_DELETE_REQUEST_LOGS_ENABLED: false, // 新增默认值
      AUTO_DELETE_REQUEST_LOGS_DAYS: 30, // 新增默认值
      // --- 新增：处理假流式配置的默认值 ---
      FAKE_STREAM_ENABLED: false,
      FAKE_STREAM_EMPTY_DATA_INTERVAL_SECONDS: 5,
      // --- 结束：处理假流式配置的默认值 ---
    };

    populateForm(defaultConfig);
    if (configForm) {
      // Ensure form exists
      initializeSensitiveFields(); // Call initializeSensitiveFields to handle initial masking
    }
    toggleProviderConfig("smms");
  }
}

/**
 * Populates the configuration form with data.
 * @param {object} config - The configuration object.
 */
function populateForm(config) {
  const modelIdMap = {}; // modelName -> modelId

  // 1. Clear existing dynamic content first
  const arrayContainers = document.querySelectorAll(".array-container");
  arrayContainers.forEach((container) => {
    container.innerHTML = ""; // Clear all array containers
  });
  const budgetMapContainer = document.getElementById(
    "THINKING_BUDGET_MAP_container"
  );
  if (budgetMapContainer) {
    budgetMapContainer.innerHTML = ""; // Clear budget map container
  } else {
    console.error("Critical: THINKING_BUDGET_MAP_container not found!");
    return; // Cannot proceed
  }

  // 2. Populate THINKING_MODELS and build the map
  if (Array.isArray(config.THINKING_MODELS)) {
    const container = document.getElementById("THINKING_MODELS_container");
    if (container) {
      config.THINKING_MODELS.forEach((modelName) => {
        if (modelName && typeof modelName === "string" && modelName.trim()) {
          const trimmedModelName = modelName.trim();
          const modelId = addArrayItemWithValue(
            "THINKING_MODELS",
            trimmedModelName
          );
          if (modelId) {
            modelIdMap[trimmedModelName] = modelId;
          } else {
            console.warn(
              `Failed to get modelId for THINKING_MODEL: '${trimmedModelName}'`
            );
          }
        } else {
          console.warn(`Invalid THINKING_MODEL entry found:`, modelName);
        }
      });
    } else {
      console.error("Critical: THINKING_MODELS_container not found!");
    }
  }

  // 3. Populate THINKING_BUDGET_MAP using the map
  let budgetItemsAdded = false;
  if (
    config.THINKING_BUDGET_MAP &&
    typeof config.THINKING_BUDGET_MAP === "object"
  ) {
    for (const [modelName, budgetValue] of Object.entries(
      config.THINKING_BUDGET_MAP
    )) {
      if (modelName && typeof modelName === "string") {
        const trimmedModelName = modelName.trim();
        const modelId = modelIdMap[trimmedModelName]; // Look up the ID
        if (modelId) {
          createAndAppendBudgetMapItem(trimmedModelName, budgetValue, modelId);
          budgetItemsAdded = true;
        } else {
          console.warn(
            `Budget map: Could not find model ID for '${trimmedModelName}'. Skipping budget item.`
          );
        }
      } else {
        console.warn(`Invalid key found in THINKING_BUDGET_MAP:`, modelName);
      }
    }
  }
  if (!budgetItemsAdded && budgetMapContainer) {
    budgetMapContainer.innerHTML =
      '<div class="text-gray-500 text-sm italic">请在上方添加思考模型，预算将自动关联。</div>';
  }

  // 4. Populate other array fields (excluding THINKING_MODELS)
  for (const [key, value] of Object.entries(config)) {
    if (Array.isArray(value) && key !== "THINKING_MODELS") {
      const container = document.getElementById(`${key}_container`);
      if (container) {
        value.forEach((itemValue) => {
          if (typeof itemValue === "string") {
            addArrayItemWithValue(key, itemValue);
          } else {
            console.warn(`Invalid item found in array '${key}':`, itemValue);
          }
        });
      }
    }
  }

  // 5. Populate non-array/non-budget fields
  for (const [key, value] of Object.entries(config)) {
    if (
      !Array.isArray(value) &&
      !(
        typeof value === "object" &&
        value !== null &&
        key === "THINKING_BUDGET_MAP"
      )
    ) {
      const element = document.getElementById(key);
      if (element) {
        if (element.type === "checkbox" && typeof value === "boolean") {
          element.checked = value;
        } else if (element.type !== "checkbox") {
          if (key === "LOG_LEVEL" && typeof value === "string") {
            element.value = value.toUpperCase();
          } else {
            element.value = value !== null && value !== undefined ? value : "";
          }
        }
      }
    }
  }

  // 6. Initialize upload provider
  const uploadProvider = document.getElementById("UPLOAD_PROVIDER");
  if (uploadProvider) {
    toggleProviderConfig(uploadProvider.value);
  }

  // Populate SAFETY_SETTINGS
  let safetyItemsAdded = false;
  if (safetySettingsContainer && Array.isArray(config.SAFETY_SETTINGS)) {
    config.SAFETY_SETTINGS.forEach((setting) => {
      if (
        setting &&
        typeof setting === "object" &&
        setting.category &&
        setting.threshold
      ) {
        addSafetySettingItem(setting.category, setting.threshold);
        safetyItemsAdded = true;
      } else {
        console.warn("Invalid safety setting item found:", setting);
      }
    });
  }
  if (safetySettingsContainer && !safetyItemsAdded) {
    safetySettingsContainer.innerHTML =
      '<div class="text-gray-500 text-sm italic">定义模型的安全过滤阈值。</div>';
  }

  // --- 新增：处理自动删除错误日志的字段 ---
  const autoDeleteEnabledCheckbox = document.getElementById(
    "AUTO_DELETE_ERROR_LOGS_ENABLED"
  );
  const autoDeleteDaysSelect = document.getElementById(
    "AUTO_DELETE_ERROR_LOGS_DAYS"
  );

  if (autoDeleteEnabledCheckbox && autoDeleteDaysSelect) {
    autoDeleteEnabledCheckbox.checked = !!config.AUTO_DELETE_ERROR_LOGS_ENABLED; // 确保是布尔值
    autoDeleteDaysSelect.value = config.AUTO_DELETE_ERROR_LOGS_DAYS || 7; // 默认7天

    // 根据复选框状态设置下拉框的禁用状态
    autoDeleteDaysSelect.disabled = !autoDeleteEnabledCheckbox.checked;

    // 添加事件监听器
    autoDeleteEnabledCheckbox.addEventListener("change", function () {
      autoDeleteDaysSelect.disabled = !this.checked;
    });
  }
  // --- 结束：处理自动删除错误日志的字段 ---

  // --- 新增：处理自动删除请求日志的字段 ---
  const autoDeleteRequestEnabledCheckbox = document.getElementById(
    "AUTO_DELETE_REQUEST_LOGS_ENABLED"
  );
  const autoDeleteRequestDaysSelect = document.getElementById(
    "AUTO_DELETE_REQUEST_LOGS_DAYS"
  );

  if (autoDeleteRequestEnabledCheckbox && autoDeleteRequestDaysSelect) {
    autoDeleteRequestEnabledCheckbox.checked =
      !!config.AUTO_DELETE_REQUEST_LOGS_ENABLED;
    autoDeleteRequestDaysSelect.value =
      config.AUTO_DELETE_REQUEST_LOGS_DAYS || 30;
    autoDeleteRequestDaysSelect.disabled =
      !autoDeleteRequestEnabledCheckbox.checked;

    autoDeleteRequestEnabledCheckbox.addEventListener("change", function () {
      autoDeleteRequestDaysSelect.disabled = !this.checked;
    });
  }
  // --- 结束：处理自动删除请求日志的字段 ---

  // --- 新增：处理假流式配置的字段 ---
  const fakeStreamEnabledCheckbox = document.getElementById(
    "FAKE_STREAM_ENABLED"
  );
  const fakeStreamIntervalInput = document.getElementById(
    "FAKE_STREAM_EMPTY_DATA_INTERVAL_SECONDS"
  );

  if (fakeStreamEnabledCheckbox && fakeStreamIntervalInput) {
    fakeStreamEnabledCheckbox.checked = !!config.FAKE_STREAM_ENABLED;
    fakeStreamIntervalInput.value =
      config.FAKE_STREAM_EMPTY_DATA_INTERVAL_SECONDS || 5;
    // 根据复选框状态设置输入框的禁用状态 (如果需要)
    // fakeStreamIntervalInput.disabled = !fakeStreamEnabledCheckbox.checked;
    // fakeStreamEnabledCheckbox.addEventListener("change", function () {
    //   fakeStreamIntervalInput.disabled = !this.checked;
    // });
  }
  // --- 结束：处理假流式配置的字段 ---
}

/**
 * Handles the bulk addition of API keys from the modal input.
 */
function handleBulkAddApiKeys() {
  const apiKeyContainer = document.getElementById("API_KEYS_container");
  if (!apiKeyBulkInput || !apiKeyContainer || !apiKeyModal) return;

  const bulkText = apiKeyBulkInput.value;
  const extractedKeys = bulkText.match(API_KEY_REGEX) || [];

  const currentKeyInputs = apiKeyContainer.querySelectorAll(
    `.${ARRAY_INPUT_CLASS}.${SENSITIVE_INPUT_CLASS}`
  );
  let currentKeys = Array.from(currentKeyInputs)
    .map((input) => {
      return input.hasAttribute("data-real-value")
        ? input.getAttribute("data-real-value")
        : input.value;
    })
    .filter((key) => key && key.trim() !== "" && key !== MASKED_VALUE);

  const combinedKeys = new Set([...currentKeys, ...extractedKeys]);
  const uniqueKeys = Array.from(combinedKeys);

  apiKeyContainer.innerHTML = ""; // Clear existing items more directly

  uniqueKeys.forEach((key) => {
    addArrayItemWithValue("API_KEYS", key);
  });

  const newKeyInputs = apiKeyContainer.querySelectorAll(
    `.${ARRAY_INPUT_CLASS}.${SENSITIVE_INPUT_CLASS}`
  );
  newKeyInputs.forEach((input) => {
    if (configForm && typeof initializeSensitiveFields === "function") {
      const focusoutEvent = new Event("focusout", {
        bubbles: true,
        cancelable: true,
      });
      input.dispatchEvent(focusoutEvent);
    }
  });

  closeModal(apiKeyModal);
  showNotification(`添加/更新了 ${uniqueKeys.length} 个唯一密钥`, "success");
}

/**
 * Handles searching/filtering of API keys in the list.
 */
function handleApiKeySearch() {
  const apiKeyContainer = document.getElementById("API_KEYS_container");
  if (!apiKeySearchInput || !apiKeyContainer) return;

  const searchTerm = apiKeySearchInput.value.toLowerCase();
  const keyItems = apiKeyContainer.querySelectorAll(`.${ARRAY_ITEM_CLASS}`);

  keyItems.forEach((item) => {
    const input = item.querySelector(
      `.${ARRAY_INPUT_CLASS}.${SENSITIVE_INPUT_CLASS}`
    );
    if (input) {
      const realValue = input.hasAttribute("data-real-value")
        ? input.getAttribute("data-real-value").toLowerCase()
        : input.value.toLowerCase();
      item.style.display = realValue.includes(searchTerm) ? "flex" : "none";
    }
  });
}

/**
 * Handles the bulk deletion of API keys based on input from the modal.
 */
function handleBulkDeleteApiKeys() {
  const apiKeyContainer = document.getElementById("API_KEYS_container");
  if (!bulkDeleteApiKeyInput || !apiKeyContainer || !bulkDeleteApiKeyModal)
    return;

  const bulkText = bulkDeleteApiKeyInput.value;
  if (!bulkText.trim()) {
    showNotification("请粘贴需要删除的 API 密钥", "warning");
    return;
  }

  const keysToDelete = new Set(bulkText.match(API_KEY_REGEX) || []);

  if (keysToDelete.size === 0) {
    showNotification("未在输入内容中提取到有效的 API 密钥格式", "warning");
    return;
  }

  const keyItems = apiKeyContainer.querySelectorAll(`.${ARRAY_ITEM_CLASS}`);
  let deleteCount = 0;

  keyItems.forEach((item) => {
    const input = item.querySelector(
      `.${ARRAY_INPUT_CLASS}.${SENSITIVE_INPUT_CLASS}`
    );
    const realValue =
      input &&
      (input.hasAttribute("data-real-value")
        ? input.getAttribute("data-real-value")
        : input.value);
    if (realValue && keysToDelete.has(realValue)) {
      item.remove();
      deleteCount++;
    }
  });

  closeModal(bulkDeleteApiKeyModal);

  if (deleteCount > 0) {
    showNotification(`成功删除了 ${deleteCount} 个匹配的密钥`, "success");
  } else {
    showNotification("列表中未找到您输入的任何密钥进行删除", "info");
  }
  bulkDeleteApiKeyInput.value = "";
}

/**
 * Handles the bulk addition of proxies from the modal input.
 */
function handleBulkAddProxies() {
  const proxyContainer = document.getElementById("PROXIES_container");
  if (!proxyBulkInput || !proxyContainer || !proxyModal) return;

  const bulkText = proxyBulkInput.value;
  const extractedProxies = bulkText.match(PROXY_REGEX) || [];

  const currentProxyInputs = proxyContainer.querySelectorAll(
    `.${ARRAY_INPUT_CLASS}`
  );
  const currentProxies = Array.from(currentProxyInputs)
    .map((input) => input.value)
    .filter((proxy) => proxy.trim() !== "");

  const combinedProxies = new Set([...currentProxies, ...extractedProxies]);
  const uniqueProxies = Array.from(combinedProxies);

  proxyContainer.innerHTML = ""; // Clear existing items

  uniqueProxies.forEach((proxy) => {
    addArrayItemWithValue("PROXIES", proxy);
  });

  closeModal(proxyModal);
  showNotification(`添加/更新了 ${uniqueProxies.length} 个唯一代理`, "success");
}

/**
 * Handles the bulk deletion of proxies based on input from the modal.
 */
function handleBulkDeleteProxies() {
  const proxyContainer = document.getElementById("PROXIES_container");
  if (!bulkDeleteProxyInput || !proxyContainer || !bulkDeleteProxyModal) return;

  const bulkText = bulkDeleteProxyInput.value;
  if (!bulkText.trim()) {
    showNotification("请粘贴需要删除的代理地址", "warning");
    return;
  }

  const proxiesToDelete = new Set(bulkText.match(PROXY_REGEX) || []);

  if (proxiesToDelete.size === 0) {
    showNotification("未在输入内容中提取到有效的代理地址格式", "warning");
    return;
  }

  const proxyItems = proxyContainer.querySelectorAll(`.${ARRAY_ITEM_CLASS}`);
  let deleteCount = 0;

  proxyItems.forEach((item) => {
    const input = item.querySelector(`.${ARRAY_INPUT_CLASS}`);
    if (input && proxiesToDelete.has(input.value)) {
      item.remove();
      deleteCount++;
    }
  });

  closeModal(bulkDeleteProxyModal);

  if (deleteCount > 0) {
    showNotification(`成功删除了 ${deleteCount} 个匹配的代理`, "success");
  } else {
    showNotification("列表中未找到您输入的任何代理进行删除", "info");
  }
  bulkDeleteProxyInput.value = "";
}

/**
 * Handles the bulk addition of Vertex API keys from the modal input.
 */
function handleBulkAddVertexApiKeys() {
  const vertexApiKeyContainer = document.getElementById(
    "VERTEX_API_KEYS_container"
  );
  if (
    !vertexApiKeyBulkInput ||
    !vertexApiKeyContainer ||
    !vertexApiKeyModal
  ) {
    return;
  }

  const bulkText = vertexApiKeyBulkInput.value;
  const extractedKeys = bulkText.match(VERTEX_API_KEY_REGEX) || [];

  const currentKeyInputs = vertexApiKeyContainer.querySelectorAll(
    `.${ARRAY_INPUT_CLASS}.${SENSITIVE_INPUT_CLASS}`
  );
  let currentKeys = Array.from(currentKeyInputs)
    .map((input) => {
      return input.hasAttribute("data-real-value")
        ? input.getAttribute("data-real-value")
        : input.value;
    })
    .filter((key) => key && key.trim() !== "" && key !== MASKED_VALUE);

  const combinedKeys = new Set([...currentKeys, ...extractedKeys]);
  const uniqueKeys = Array.from(combinedKeys);

  vertexApiKeyContainer.innerHTML = ""; // Clear existing items

  uniqueKeys.forEach((key) => {
    addArrayItemWithValue("VERTEX_API_KEYS", key); // VERTEX_API_KEYS are sensitive
  });

  // Ensure new sensitive inputs are masked
  const newKeyInputs = vertexApiKeyContainer.querySelectorAll(
    `.${ARRAY_INPUT_CLASS}.${SENSITIVE_INPUT_CLASS}`
  );
  newKeyInputs.forEach((input) => {
    if (configForm && typeof initializeSensitiveFields === "function") {
      const focusoutEvent = new Event("focusout", {
        bubbles: true,
        cancelable: true,
      });
      input.dispatchEvent(focusoutEvent);
    }
  });

  closeModal(vertexApiKeyModal);
  showNotification(
    `添加/更新了 ${uniqueKeys.length} 个唯一 Vertex 密钥`,
    "success"
  );
  vertexApiKeyBulkInput.value = "";
}

/**
 * Handles the bulk deletion of Vertex API keys based on input from the modal.
 */
function handleBulkDeleteVertexApiKeys() {
  const vertexApiKeyContainer = document.getElementById(
    "VERTEX_API_KEYS_container"
  );
  if (
    !bulkDeleteVertexApiKeyInput ||
    !vertexApiKeyContainer ||
    !bulkDeleteVertexApiKeyModal
  ) {
    return;
  }

  const bulkText = bulkDeleteVertexApiKeyInput.value;
  if (!bulkText.trim()) {
    showNotification("请粘贴需要删除的 Vertex API 密钥", "warning");
    return;
  }

  const keysToDelete = new Set(bulkText.match(VERTEX_API_KEY_REGEX) || []);

  if (keysToDelete.size === 0) {
    showNotification(
      "未在输入内容中提取到有效的 Vertex API 密钥格式",
      "warning"
    );
    return;
  }

  const keyItems = vertexApiKeyContainer.querySelectorAll(`.${ARRAY_ITEM_CLASS}`);
  let deleteCount = 0;

  keyItems.forEach((item) => {
    const input = item.querySelector(
      `.${ARRAY_INPUT_CLASS}.${SENSITIVE_INPUT_CLASS}`
    );
    const realValue =
      input &&
      (input.hasAttribute("data-real-value")
        ? input.getAttribute("data-real-value")
        : input.value);
    if (realValue && keysToDelete.has(realValue)) {
      item.remove();
      deleteCount++;
    }
  });

  closeModal(bulkDeleteVertexApiKeyModal);

  if (deleteCount > 0) {
    showNotification(`成功删除了 ${deleteCount} 个匹配的 Vertex 密钥`, "success");
  } else {
    showNotification("列表中未找到您输入的任何 Vertex 密钥进行删除", "info");
  }
  bulkDeleteVertexApiKeyInput.value = "";
}

/**
 * Switches the active configuration tab.
 * @param {string} tabId - The ID of the tab to switch to.
 */
function switchTab(tabId) {
  console.log(`Switching to tab: ${tabId}`);

  // 定义选中态和未选中态的样式
  const activeStyle = "background-color: #3b82f6 !important; color: #ffffff !important; border: 2px solid #2563eb !important; box-shadow: 0 4px 12px -2px rgba(59, 130, 246, 0.4), 0 2px 6px -1px rgba(59, 130, 246, 0.2) !important; transform: translateY(-2px) !important; font-weight: 600 !important;";
  const inactiveStyle = "background-color: #f8fafc !important; color: #64748b !important; border: 2px solid #e2e8f0 !important; box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1) !important; font-weight: 500 !important; transform: none !important;";

  // 更新标签按钮状态
  const tabButtons = document.querySelectorAll(".tab-btn");
  console.log(`Found ${tabButtons.length} tab buttons`);

  tabButtons.forEach((button) => {
    const buttonTabId = button.getAttribute("data-tab");
    if (buttonTabId === tabId) {
      // 激活状态：直接设置内联样式
      button.classList.add("active");
      button.setAttribute("style", activeStyle);
      console.log(`Applied active style to button: ${buttonTabId}`);
    } else {
      // 非激活状态：直接设置内联样式
      button.classList.remove("active");
      button.setAttribute("style", inactiveStyle);
      console.log(`Applied inactive style to button: ${buttonTabId}`);
    }
  });

  // 更新内容区域
  const sections = document.querySelectorAll(".config-section");
  sections.forEach((section) => {
    if (section.id === `${tabId}-section`) {
      section.classList.add("active");
    } else {
      section.classList.remove("active");
    }
  });
}

/**
 * Toggles the visibility of configuration sections for different upload providers.
 * @param {string} provider - The selected upload provider.
 */
function toggleProviderConfig(provider) {
  const providerConfigs = document.querySelectorAll(".provider-config");
  providerConfigs.forEach((config) => {
    if (config.getAttribute("data-provider") === provider) {
      config.classList.add("active");
    } else {
      config.classList.remove("active");
    }
  });
}

/**
 * Creates and appends an input field for an array item.
 * @param {string} key - The configuration key for the array.
 * @param {string} value - The initial value for the input field.
 * @param {boolean} isSensitive - Whether the input is for sensitive data.
 * @param {string|null} modelId - Optional model ID for thinking models.
 * @returns {HTMLInputElement} The created input element.
 */
function createArrayInput(key, value, isSensitive, modelId = null) {
  const input = document.createElement("input");
  input.type = "text";
  input.name = `${key}[]`; // Used for form submission if not handled by JS
  input.value = value;
  let inputClasses = `${ARRAY_INPUT_CLASS} flex-grow px-3 py-2 border-none rounded-l-md focus:outline-none form-input-themed`;
  if (isSensitive) {
    inputClasses += ` ${SENSITIVE_INPUT_CLASS}`;
  }
  input.className = inputClasses;
  if (modelId) {
    input.setAttribute("data-model-id", modelId);
    input.placeholder = "思考模型名称";
  }
  return input;
}

/**
 * Creates a generate token button for allowed tokens.
 * @returns {HTMLButtonElement} The created button element.
 */
function createGenerateTokenButton() {
  const generateBtn = document.createElement("button");
  generateBtn.type = "button";
  generateBtn.className =
    "generate-btn px-2 py-2 text-gray-500 hover:text-primary-600 focus:outline-none rounded-r-md bg-gray-100 hover:bg-gray-200 transition-colors";
  generateBtn.innerHTML = '<i class="fas fa-dice"></i>';
  generateBtn.title = "生成随机令牌";
  // Event listener will be added via delegation in DOMContentLoaded
  return generateBtn;
}

/**
 * Creates a remove button for an array item.
 * @returns {HTMLButtonElement} The created button element.
 */
function createRemoveButton() {
  const removeBtn = document.createElement("button");
  removeBtn.type = "button";
  removeBtn.className =
    "remove-btn text-gray-400 hover:text-red-500 focus:outline-none transition-colors duration-150";
  removeBtn.innerHTML = '<i class="fas fa-trash-alt"></i>';
  removeBtn.title = "删除";
  // Event listener will be added via delegation in DOMContentLoaded
  return removeBtn;
}

/**
 * Adds a new item to an array configuration section (e.g., API_KEYS, ALLOWED_TOKENS).
 * This function is typically called by a "+" button.
 * @param {string} key - The configuration key for the array (e.g., 'API_KEYS').
 */
function addArrayItem(key) {
  const container = document.getElementById(`${key}_container`);
  if (!container) return;

  const newItemValue = ""; // New items start empty
  const modelId = addArrayItemWithValue(key, newItemValue); // This adds the DOM element

  if (key === "THINKING_MODELS" && modelId) {
    createAndAppendBudgetMapItem(newItemValue, 0, modelId); // Default budget 0
  }
}

/**
 * Adds an array item with a specific value to the DOM.
 * This is used both for initially populating the form and for adding new items.
 * @param {string} key - The configuration key (e.g., 'API_KEYS', 'THINKING_MODELS').
 * @param {string} value - The value for the array item.
 * @returns {string|null} The generated modelId if it's a thinking model, otherwise null.
 */
function addArrayItemWithValue(key, value) {
  const container = document.getElementById(`${key}_container`);
  if (!container) return null;

  const isThinkingModel = key === "THINKING_MODELS";
  const isAllowedToken = key === "ALLOWED_TOKENS";
  const isVertexApiKey = key === "VERTEX_API_KEYS"; // 新增判断
  const isSensitive =
    key === "API_KEYS" || isAllowedToken || isVertexApiKey; // 更新敏感判断
  const modelId = isThinkingModel ? generateUUID() : null;

  const arrayItem = document.createElement("div");
  arrayItem.className = `${ARRAY_ITEM_CLASS} flex items-center mb-2 gap-2`;
  if (isThinkingModel) {
    arrayItem.setAttribute("data-model-id", modelId);
  }

  const inputWrapper = document.createElement("div");
  inputWrapper.className =
    "flex items-center flex-grow rounded-md focus-within:border-blue-500 focus-within:ring focus-within:ring-blue-500 focus-within:ring-opacity-50";
  // Apply light theme border directly via style
  inputWrapper.style.border = "1px solid rgba(0, 0, 0, 0.12)";
  inputWrapper.style.backgroundColor = "transparent"; // Ensure wrapper is transparent

  const input = createArrayInput(
    key,
    value,
    isSensitive,
    isThinkingModel ? modelId : null
  );
  inputWrapper.appendChild(input);

  if (isAllowedToken) {
    const generateBtn = createGenerateTokenButton();
    inputWrapper.appendChild(generateBtn);
  } else {
    // Ensure right-side rounding if no button is present
    input.classList.add("rounded-r-md");
  }

  const removeBtn = createRemoveButton();

  arrayItem.appendChild(inputWrapper);
  arrayItem.appendChild(removeBtn);
  container.appendChild(arrayItem);

  // Initialize sensitive field if applicable
  if (isSensitive && input.value) {
    if (configForm && typeof initializeSensitiveFields === "function") {
      const focusoutEvent = new Event("focusout", {
        bubbles: true,
        cancelable: true,
      });
      input.dispatchEvent(focusoutEvent);
    }
  }
  return isThinkingModel ? modelId : null;
}

/**
 * Creates and appends a DOM element for a thinking model's budget mapping.
 * @param {string} mapKey - The model name (key for the map).
 * @param {number|string} mapValue - The budget value.
 * @param {string} modelId - The unique ID of the corresponding thinking model.
 */
function createAndAppendBudgetMapItem(mapKey, mapValue, modelId) {
  const container = document.getElementById("THINKING_BUDGET_MAP_container");
  if (!container) {
    console.error(
      "Cannot add budget item: THINKING_BUDGET_MAP_container not found!"
    );
    return;
  }

  // If container currently only has the placeholder, clear it
  const placeholder = container.querySelector(".text-gray-500.italic");
  // Check if the only child is the placeholder before clearing
  if (
    placeholder &&
    container.children.length === 1 &&
    container.firstChild === placeholder
  ) {
    container.innerHTML = "";
  }

  const mapItem = document.createElement("div");
  mapItem.className = `${MAP_ITEM_CLASS} flex items-center mb-2 gap-2`;
  mapItem.setAttribute("data-model-id", modelId);

  const keyInput = document.createElement("input");
  keyInput.type = "text";
  keyInput.value = mapKey;
  keyInput.placeholder = "模型名称 (自动关联)";
  keyInput.readOnly = true;
  keyInput.className = `${MAP_KEY_INPUT_CLASS} flex-grow px-3 py-2 border border-gray-300 rounded-md focus:outline-none bg-gray-100 text-gray-500`;
  keyInput.setAttribute("data-model-id", modelId);

  const valueInput = document.createElement("input");
  valueInput.type = "number";
  const intValue = parseInt(mapValue, 10);
  valueInput.value = isNaN(intValue) ? 0 : intValue;
  valueInput.placeholder = "预算 (整数)";
  valueInput.className = `${MAP_VALUE_INPUT_CLASS} w-24 px-3 py-2 border border-gray-300 rounded-md focus:outline-none focus:border-primary-500 focus:ring focus:ring-primary-200 focus:ring-opacity-50`;
  valueInput.min = -1;
  valueInput.max = 32767;
  valueInput.addEventListener("input", function () {
    let val = this.value.replace(/[^0-9-]/g, "");
    if (val !== "") {
      val = parseInt(val, 10);
      if (val < -1) val = -1;
      if (val > 32767) val = 32767;
    }
    this.value = val; // Corrected variable name
  });

  // Remove Button - Removed for budget map items
  // const removeBtn = document.createElement('button');
  // removeBtn.type = 'button';
  // removeBtn.className = 'remove-btn text-gray-300 cursor-not-allowed focus:outline-none'; // Kept original class for reference
  // removeBtn.innerHTML = '<i class="fas fa-trash-alt"></i>';
  // removeBtn.title = '请从上方模型列表删除';
  // removeBtn.disabled = true;

  mapItem.appendChild(keyInput);
  mapItem.appendChild(valueInput);
  // mapItem.appendChild(removeBtn); // Do not append the remove button

  container.appendChild(mapItem);
}

/**
 * Collects all data from the configuration form.
 * @returns {object} An object containing all configuration data.
 */
function collectFormData() {
  const formData = {};

  // 处理普通输入和 select
  const inputsAndSelects = document.querySelectorAll(
    'input[type="text"], input[type="number"], input[type="password"], select, textarea'
  );
  inputsAndSelects.forEach((element) => {
    if (
      element.name &&
      !element.name.includes("[]") &&
      !element.closest(".array-container") &&
      !element.closest(`.${MAP_ITEM_CLASS}`) &&
      !element.closest(`.${SAFETY_SETTING_ITEM_CLASS}`)
    ) {
      if (element.type === "number") {
        formData[element.name] = parseFloat(element.value);
      } else if (
        element.classList.contains(SENSITIVE_INPUT_CLASS) &&
        element.hasAttribute("data-real-value")
      ) {
        formData[element.name] = element.getAttribute("data-real-value");
      } else {
        formData[element.name] = element.value;
      }
    }
  });

  const checkboxes = document.querySelectorAll('input[type="checkbox"]');
  checkboxes.forEach((checkbox) => {
    formData[checkbox.name] = checkbox.checked;
  });

  const arrayContainers = document.querySelectorAll(".array-container");
  arrayContainers.forEach((container) => {
    const key = container.id.replace("_container", "");
    const arrayInputs = container.querySelectorAll(`.${ARRAY_INPUT_CLASS}`);
    formData[key] = Array.from(arrayInputs)
      .map((input) => {
        if (
          input.classList.contains(SENSITIVE_INPUT_CLASS) &&
          input.hasAttribute("data-real-value")
        ) {
          return input.getAttribute("data-real-value");
        }
        return input.value;
      })
      .filter(
        (value) => value && value.trim() !== "" && value !== MASKED_VALUE
      ); // Ensure MASKED_VALUE is also filtered if not handled
  });

  const budgetMapContainer = document.getElementById(
    "THINKING_BUDGET_MAP_container"
  );
  if (budgetMapContainer) {
    formData["THINKING_BUDGET_MAP"] = {};
    const mapItems = budgetMapContainer.querySelectorAll(`.${MAP_ITEM_CLASS}`);
    mapItems.forEach((item) => {
      const keyInput = item.querySelector(`.${MAP_KEY_INPUT_CLASS}`);
      const valueInput = item.querySelector(`.${MAP_VALUE_INPUT_CLASS}`);
      if (keyInput && valueInput && keyInput.value.trim() !== "") {
        const budgetValue = parseInt(valueInput.value, 10);
        formData["THINKING_BUDGET_MAP"][keyInput.value.trim()] = isNaN(
          budgetValue
        )
          ? 0
          : budgetValue;
      }
    });
  }

  if (safetySettingsContainer) {
    formData["SAFETY_SETTINGS"] = [];
    const settingItems = safetySettingsContainer.querySelectorAll(
      `.${SAFETY_SETTING_ITEM_CLASS}`
    );
    settingItems.forEach((item) => {
      const categorySelect = item.querySelector(".safety-category-select");
      const thresholdSelect = item.querySelector(".safety-threshold-select");
      if (
        categorySelect &&
        thresholdSelect &&
        categorySelect.value &&
        thresholdSelect.value
      ) {
        formData["SAFETY_SETTINGS"].push({
          category: categorySelect.value,
          threshold: thresholdSelect.value,
        });
      }
    });
  }

  // --- 新增：收集自动删除错误日志的配置 ---
  const autoDeleteEnabledCheckbox = document.getElementById(
    "AUTO_DELETE_ERROR_LOGS_ENABLED"
  );
  if (autoDeleteEnabledCheckbox) {
    formData["AUTO_DELETE_ERROR_LOGS_ENABLED"] =
      autoDeleteEnabledCheckbox.checked;
  }

  const autoDeleteDaysSelect = document.getElementById(
    "AUTO_DELETE_ERROR_LOGS_DAYS"
  );
  if (autoDeleteDaysSelect) {
    // 如果复选框未选中，则不应提交天数，或者可以提交一个默认/无效值，
    // 但后端应该只在 ENABLED 为 true 时才关心 DAYS。
    // 这里我们总是收集它，后端逻辑会处理。
    formData["AUTO_DELETE_ERROR_LOGS_DAYS"] = parseInt(
      autoDeleteDaysSelect.value,
      10
    );
  }
  // --- 结束：收集自动删除错误日志的配置 ---

  // --- 新增：收集自动删除请求日志的配置 ---
  const autoDeleteRequestEnabledCheckbox = document.getElementById(
    "AUTO_DELETE_REQUEST_LOGS_ENABLED"
  );
  if (autoDeleteRequestEnabledCheckbox) {
    formData["AUTO_DELETE_REQUEST_LOGS_ENABLED"] =
      autoDeleteRequestEnabledCheckbox.checked;
  }

  const autoDeleteRequestDaysSelect = document.getElementById(
    "AUTO_DELETE_REQUEST_LOGS_DAYS"
  );
  if (autoDeleteRequestDaysSelect) {
    formData["AUTO_DELETE_REQUEST_LOGS_DAYS"] = parseInt(
      autoDeleteRequestDaysSelect.value,
      10
    );
  }
  // --- 结束：收集自动删除请求日志的配置 ---

  // --- 新增：收集假流式配置 ---
  const fakeStreamEnabledCheckbox = document.getElementById(
    "FAKE_STREAM_ENABLED"
  );
  if (fakeStreamEnabledCheckbox) {
    formData["FAKE_STREAM_ENABLED"] = fakeStreamEnabledCheckbox.checked;
  }
  const fakeStreamIntervalInput = document.getElementById(
    "FAKE_STREAM_EMPTY_DATA_INTERVAL_SECONDS"
  );
  if (fakeStreamIntervalInput) {
    formData["FAKE_STREAM_EMPTY_DATA_INTERVAL_SECONDS"] = parseInt(
      fakeStreamIntervalInput.value,
      10
    );
  }
  // --- 结束：收集假流式配置 ---

  return formData;
}

/**
 * Stops the scheduler task on the server.
 */
async function stopScheduler() {
  try {
    const response = await fetch("/api/scheduler/stop", { method: "POST" });
    if (!response.ok) {
      console.warn(`停止定时任务失败: ${response.status}`);
    } else {
      console.log("定时任务已停止");
    }
  } catch (error) {
    console.error("调用停止定时任务API时出错:", error);
  }
}

/**
 * Starts the scheduler task on the server.
 */
async function startScheduler() {
  try {
    const response = await fetch("/api/scheduler/start", { method: "POST" });
    if (!response.ok) {
      console.warn(`启动定时任务失败: ${response.status}`);
    } else {
      console.log("定时任务已启动");
    }
  } catch (error) {
    console.error("调用启动定时任务API时出错:", error);
  }
}

/**
 * Saves the current configuration to the server.
 */
async function saveConfig() {
  try {
    const formData = collectFormData();

    showNotification("正在保存配置...", "info");

    // 1. 停止定时任务
    await stopScheduler();

    const response = await fetch("/api/config", {
      method: "PUT",
      headers: {
        "Content-Type": "application/json",
      },
      body: JSON.stringify(formData),
    });

    if (!response.ok) {
      const errorData = await response.json();
      throw new Error(
        errorData.detail || `HTTP error! status: ${response.status}`
      );
    }

    const result = await response.json();

    // 移除居中的 saveStatus 提示

    showNotification("配置保存成功", "success");

    // 3. 启动新的定时任务
    await startScheduler();
  } catch (error) {
    console.error("保存配置失败:", error);
    // 保存失败时，也尝试重启定时任务，以防万一
    await startScheduler();
    // 移除居中的 saveStatus 提示

    showNotification("保存配置失败: " + error.message, "error");
  }
}

/**
 * Initiates the configuration reset process by showing a confirmation modal.
 * @param {Event} [event] - The click event, if triggered by a button.
 */
function resetConfig(event) {
  // 阻止事件冒泡和默认行为
  if (event) {
    event.preventDefault();
    event.stopPropagation();
  }

  console.log(
    "resetConfig called. Event target:",
    event ? event.target.id : "No event"
  );

  // Ensure modal is shown only if the event comes from the reset button
  if (
    !event ||
    event.target.id === "resetBtn" ||
    (event.currentTarget && event.currentTarget.id === "resetBtn")
  ) {
    if (resetConfirmModal) {
      openModal(resetConfirmModal);
    } else {
      console.error(
        "Reset confirmation modal not found! Falling back to default confirm."
      );
      if (confirm("确定要重置所有配置吗？这将恢复到默认值。")) {
        executeReset();
      }
    }
  }
}

/**
 * Executes the actual configuration reset after confirmation.
 */
async function executeReset() {
  try {
    showNotification("正在重置配置...", "info");

    // 1. 停止定时任务
    await stopScheduler();
    const response = await fetch("/api/config/reset", { method: "POST" });
    if (!response.ok) {
      throw new Error(`HTTP error! status: ${response.status}`);
    }
    const config = await response.json();
    populateForm(config);
    // Re-initialize masking for sensitive fields after reset
    if (configForm && typeof initializeSensitiveFields === "function") {
      const sensitiveFields = configForm.querySelectorAll(
        `.${SENSITIVE_INPUT_CLASS}`
      );
      sensitiveFields.forEach((field) => {
        if (field.type === "password") {
          if (field.value) field.setAttribute("data-real-value", field.value);
        } else if (
          field.type === "text" ||
          field.tagName.toLowerCase() === "textarea"
        ) {
          const focusoutEvent = new Event("focusout", {
            bubbles: true,
            cancelable: true,
          });
          field.dispatchEvent(focusoutEvent);
        }
      });
    }
    showNotification("配置已重置为默认值", "success");

    // 3. 启动新的定时任务
    await startScheduler();
  } catch (error) {
    console.error("重置配置失败:", error);
    showNotification("重置配置失败: " + error.message, "error");
    // 重置失败时，也尝试重启定时任务
    await startScheduler();
  }
}

/**
 * Displays a notification message to the user.
 * @param {string} message - The message to display.
 * @param {string} [type='info'] - The type of notification ('info', 'success', 'error', 'warning').
 */
function showNotification(message, type = "info") {
  const notification = document.getElementById("notification");
  notification.textContent = message;

  // 统一样式为黑色半透明，与 keys_status.js 保持一致
  notification.classList.remove("bg-danger-500");
  notification.classList.add("bg-black");
  notification.style.backgroundColor = "rgba(0,0,0,0.8)";
  notification.style.color = "#fff";

  // 应用过渡效果
  notification.style.opacity = "1";
  notification.style.transform = "translate(-50%, 0)";

  // 设置自动消失
  setTimeout(() => {
    notification.style.opacity = "0";
    notification.style.transform = "translate(-50%, 10px)";
  }, 3000);
}

/**
 * Refreshes the current page.
 * @param {HTMLButtonElement} [button] - The button that triggered the refresh (to show loading state).
 */
function refreshPage(button) {
  if (button) button.classList.add("loading");
  location.reload();
}

/**
 * Scrolls the page to the top.
 */
function scrollToTop() {
  window.scrollTo({ top: 0, behavior: "smooth" });
}

/**
 * Scrolls the page to the bottom.
 */
function scrollToBottom() {
  window.scrollTo({ top: document.body.scrollHeight, behavior: "smooth" });
}

/**
 * Toggles the visibility of scroll-to-top/bottom buttons based on scroll position.
 */
function toggleScrollButtons() {
  const scrollButtons = document.querySelector(".scroll-buttons");
  if (scrollButtons) {
    scrollButtons.style.display = window.scrollY > 200 ? "flex" : "none";
  }
}

/**
 * Generates a random token string.
 * @returns {string} A randomly generated token.
 */
function generateRandomToken() {
  const characters =
    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_";
  const length = 48;
  let result = "sk-";
  for (let i = 0; i < length; i++) {
    result += characters.charAt(Math.floor(Math.random() * characters.length));
  }
  return result;
}

/**
 * Adds a new safety setting item to the DOM.
 * @param {string} [category=''] - The initial category for the setting.
 * @param {string} [threshold=''] - The initial threshold for the setting.
 */
function addSafetySettingItem(category = "", threshold = "") {
  const container = document.getElementById("SAFETY_SETTINGS_container");
  if (!container) {
    console.error(
      "Cannot add safety setting: SAFETY_SETTINGS_container not found!"
    );
    return;
  }

  // 如果容器当前只有占位符，则清除它
  const placeholder = container.querySelector(".text-gray-500.italic");
  if (
    placeholder &&
    container.children.length === 1 &&
    container.firstChild === placeholder
  ) {
    container.innerHTML = "";
  }

  const harmCategories = [
    "HARM_CATEGORY_HARASSMENT",
    "HARM_CATEGORY_HATE_SPEECH",
    "HARM_CATEGORY_SEXUALLY_EXPLICIT",
    "HARM_CATEGORY_DANGEROUS_CONTENT",
    "HARM_CATEGORY_CIVIC_INTEGRITY", // 根据需要添加或移除
  ];
  const harmThresholds = [
    "BLOCK_NONE",
    "BLOCK_LOW_AND_ABOVE",
    "BLOCK_MEDIUM_AND_ABOVE",
    "BLOCK_ONLY_HIGH",
    "OFF", // 根据 Google API 文档添加或移除
  ];

  const settingItem = document.createElement("div");
  settingItem.className = `${SAFETY_SETTING_ITEM_CLASS} flex items-center mb-2 gap-2`;

  const categorySelect = document.createElement("select");
  categorySelect.className =
    "safety-category-select flex-grow px-3 py-2 rounded-md focus:outline-none focus:border-primary-500 focus:ring focus:ring-primary-200 focus:ring-opacity-50 form-select-themed";
  harmCategories.forEach((cat) => {
    const option = document.createElement("option");
    option.value = cat;
    option.textContent = cat.replace("HARM_CATEGORY_", "");
    if (cat === category) option.selected = true;
    categorySelect.appendChild(option);
  });

  const thresholdSelect = document.createElement("select");
  thresholdSelect.className =
    "safety-threshold-select w-48 px-3 py-2 rounded-md focus:outline-none focus:border-primary-500 focus:ring focus:ring-primary-200 focus:ring-opacity-50 form-select-themed";
  harmThresholds.forEach((thr) => {
    const option = document.createElement("option");
    option.value = thr;
    option.textContent = thr.replace("BLOCK_", "").replace("_AND_ABOVE", "+");
    if (thr === threshold) option.selected = true;
    thresholdSelect.appendChild(option);
  });

  const removeBtn = document.createElement("button");
  removeBtn.type = "button";
  removeBtn.className =
    "remove-btn text-gray-400 hover:text-red-500 focus:outline-none transition-colors duration-150";
  removeBtn.innerHTML = '<i class="fas fa-trash-alt"></i>';
  removeBtn.title = "删除此设置";
  // Event listener for removeBtn is now handled by event delegation in DOMContentLoaded

  settingItem.appendChild(categorySelect);
  settingItem.appendChild(thresholdSelect);
  settingItem.appendChild(removeBtn);

  container.appendChild(settingItem);
}

// --- Model Helper Functions ---
async function fetchModels() {
  if (cachedModelsList) {
    return cachedModelsList;
  }
  try {
    showNotification("正在从 /api/config/ui/models 加载模型列表...", "info");
    const response = await fetch("/api/config/ui/models");
    if (!response.ok) {
      const errorData = await response.text();
      throw new Error(`HTTP error ${response.status}: ${errorData}`);
    }
    const responseData = await response.json(); // Changed variable name to responseData
    // The backend returns an object like: { object: "list", data: [{id: "m1"}, {id: "m2"}], success: true }
    if (
      responseData &&
      responseData.success &&
      Array.isArray(responseData.data)
    ) {
      cachedModelsList = responseData.data; // Use responseData.data
      showNotification("模型列表加载成功", "success");
      return cachedModelsList;
    } else {
      console.error("Invalid model list format received:", responseData);
      throw new Error("模型列表格式无效或请求未成功");
    }
  } catch (error) {
    console.error("加载模型列表失败:", error);
    showNotification(`加载模型列表失败: ${error.message}`, "error");
    cachedModelsList = []; // Avoid repeated fetches on error for this session, or set to null to retry
    return [];
  }
}

function renderModelsInModal() {
  if (!modelHelperListContainer) return;
  if (!cachedModelsList) {
    modelHelperListContainer.innerHTML =
      '<p class="text-gray-400 text-sm italic">模型列表尚未加载。</p>';
    return;
  }

  const searchTerm = modelHelperSearchInput.value.toLowerCase();
  const filteredModels = cachedModelsList.filter((model) =>
    model.id.toLowerCase().includes(searchTerm)
  );

  modelHelperListContainer.innerHTML = ""; // Clear previous items

  if (filteredModels.length === 0) {
    modelHelperListContainer.innerHTML =
      '<p class="text-gray-400 text-sm italic">未找到匹配的模型。</p>';
    return;
  }

  filteredModels.forEach((model) => {
    const modelItemElement = document.createElement("button");
    modelItemElement.type = "button";
    modelItemElement.textContent = model.id;
    modelItemElement.className =
      "block w-full text-left px-4 py-2 rounded-md hover:bg-blue-100 focus:bg-blue-100 focus:outline-none transition-colors text-gray-700 hover:text-gray-800";
    // Add any other classes for styling, e.g., from existing modals or array items

    modelItemElement.addEventListener("click", () =>
      handleModelSelection(model.id)
    );
    modelHelperListContainer.appendChild(modelItemElement);
  });
}

async function openModelHelperModal() {
  if (!currentModelHelperTarget) {
    console.error("Model helper target not set.");
    showNotification("无法打开模型助手：目标未设置", "error");
    return;
  }

  await fetchModels(); // Ensure models are loaded
  renderModelsInModal(); // Render them (handles empty/error cases internally)

  if (modelHelperTitleElement) {
    if (
      currentModelHelperTarget.type === "input" &&
      currentModelHelperTarget.target
    ) {
      const label = document.querySelector(
        `label[for="${currentModelHelperTarget.target.id}"]`
      );
      modelHelperTitleElement.textContent = label
        ? `为 "${label.textContent.trim()}" 选择模型`
        : "选择模型";
    } else if (currentModelHelperTarget.type === "array") {
      modelHelperTitleElement.textContent = `为 ${currentModelHelperTarget.targetKey} 添加模型`;
    } else {
      modelHelperTitleElement.textContent = "选择模型";
    }
  }
  if (modelHelperSearchInput) modelHelperSearchInput.value = ""; // Clear search on open
  if (modelHelperModal) openModal(modelHelperModal);
}

function handleModelSelection(selectedModelId) {
  if (!currentModelHelperTarget) return;

  if (
    currentModelHelperTarget.type === "input" &&
    currentModelHelperTarget.target
  ) {
    const inputElement = currentModelHelperTarget.target;
    inputElement.value = selectedModelId;
    // If the input is a sensitive field, dispatch focusout to trigger masking behavior if needed
    if (inputElement.classList.contains(SENSITIVE_INPUT_CLASS)) {
      const event = new Event("focusout", { bubbles: true, cancelable: true });
      inputElement.dispatchEvent(event);
    }
    // Dispatch input event for any other listeners
    inputElement.dispatchEvent(new Event("input", { bubbles: true }));
  } else if (
    currentModelHelperTarget.type === "array" &&
    currentModelHelperTarget.targetKey
  ) {
    const modelId = addArrayItemWithValue(
      currentModelHelperTarget.targetKey,
      selectedModelId
    );
    if (currentModelHelperTarget.targetKey === "THINKING_MODELS" && modelId) {
      // Automatically add corresponding budget map item with default budget 0
      createAndAppendBudgetMapItem(selectedModelId, 0, modelId);
    }
  }

  if (modelHelperModal) closeModal(modelHelperModal);
  currentModelHelperTarget = null; // Reset target
}

// -- End Model Helper Functions --