document.addEventListener('DOMContentLoaded', () => {
    
    // --- CONFIGURATION ---
    const workerUrl = 'https://form-handler-worker.aiagents.workers.dev/'; // Ensure this is your correct worker URL

    // --- ELEMENT SELECTIONS ---
    // Forms
    const submissionForm = document.getElementById('vessel-exchange-form');
    const lookupForm = document.getElementById('deal-lookup-form');
    const adminForm = document.getElementById('admin-action-form');
    
    // Buttons
    const showSubmissionButton = document.getElementById('show-submission-button');
    const submissionFormSubmitButton = document.getElementById('submit-button');
    const adminApproveButton = document.getElementById('admin-approve-button');
    const adminDeclineButton = document.getElementById('admin-decline-button');
    const submissionModalCloseButton = document.getElementById('submission-modal-close-button');
    const dealModalCloseButton = document.getElementById('modal-close-button');

    // Modals & Containers
    const submissionModal = document.getElementById('submission-modal');
    const dealModal = document.getElementById('deal-modal');
    const lookupContainer = document.getElementById('lookup-container');
    const lookupInput = document.getElementById('lookup-deal-id');
    
    // Status Message Areas
    const submissionStatus = document.getElementById('status-message');
    const adminStatus = document.getElementById('admin-status-message');
    
    // --- EVENT LISTENERS ---

    // Show the submission form modal
    if(showSubmissionButton) {
        showSubmissionButton.addEventListener('click', () => {
            submissionModal.classList.remove('hidden');
        });
    }

    // Close the submission form modal
    if(submissionModal) {
        submissionModalCloseButton.addEventListener('click', () => closeModal(submissionModal));
        submissionModal.addEventListener('click', (event) => {
            if (event.target === submissionModal) closeModal(submissionModal);
        });
    }

    // Close the deal info modal
    if (dealModal) {
        dealModalCloseButton.addEventListener('click', () => closeModal(dealModal));
        dealModal.addEventListener('click', (event) => {
            if (event.target === dealModal) closeModal(dealModal);
        });
    }

    // Handle New Deal Submissions
    if (submissionForm) {
        submissionForm.addEventListener('submit', handleFormSubmit);
    }

    // Handle Deal Status Lookups
    if (lookupForm) {
        lookupForm.addEventListener('submit', handleLookupSubmit);
    }

    // Handle Admin Actions
    if (adminForm) {
        adminApproveButton.addEventListener('click', () => handleAdminClick('approve'));
        adminDeclineButton.addEventListener('click', () => handleAdminClick('decline'));
    }

    // --- HANDLER FUNCTIONS ---

    /**
     * Handles the main form submission to create a new deal.
     */
    async function handleFormSubmit(event) {
        event.preventDefault();
        
        showStatus(submissionStatus, 'Submitting...');
        submissionFormSubmitButton.disabled = true;
        
        try {
            const formData = new FormData(submissionForm);
            const response = await fetch(workerUrl, { method: 'POST', body: formData });
            const resultText = await response.text();

            if (!response.ok) {
                throw new Error(resultText); 
            }
            
            const result = JSON.parse(resultText);
            const dealId = result.deal_id;
            
            showSuccess(submissionStatus, `Success! Deal ID copied below.`);
            lookupInput.value = dealId;
            
            lookupContainer.classList.add('highlight');
            setTimeout(() => lookupContainer.classList.remove('highlight'), 2000);

            submissionForm.reset();
            
            // This logic now correctly closes the modal after a success
            setTimeout(() => closeModal(submissionModal), 2500);

        } catch (error) {
            showError(submissionStatus, error.message);
        } finally {
            submissionFormSubmitButton.disabled = false;
        }
    }

    /**
     * Handles the lookup form submission to check a deal's status.
     */
    async function handleLookupSubmit(event) {
        event.preventDefault();
        const lookupButton = document.getElementById('lookup-button');
        lookupButton.disabled = true;

        try {
            if (!lookupInput.value) throw new Error("Please enter a Deal ID.");
            const response = await fetch(`${workerUrl}?deal_id=${lookupInput.value}`, { method: 'GET' });
            const result = await response.json();
            if (!response.ok) throw new Error(result.error || 'Failed to fetch deal.');
            openDealInfoModal(result);
        } catch (error) {
            alert(`Error: ${error.message}`);
        } finally {
            lookupButton.disabled = false;
        }
    }

    /**
     * Handles clicks on the admin approve/decline buttons.
     */
    async function handleAdminClick(action) {
        const dealId = document.getElementById('admin-deal-id').value;
        if (!dealId) {
            showError(adminStatus, 'Please enter a Deal ID.');
            return;
        }

        showStatus(adminStatus, 'Processing action...');
        adminApproveButton.disabled = true;
        adminDeclineButton.disabled = true;

        const formData = new FormData();
        formData.append('action', action);
        formData.append('deal_id', dealId);

        try {
            const response = await fetch(workerUrl, { method: 'POST', body: formData });
            const resultText = await response.text();
            const result = JSON.parse(resultText);
            if (!response.ok) throw new Error(result.message || result.error || resultText);
            showSuccess(adminStatus, result.message);
        } catch (error) {
            showError(adminStatus, error.message);
        } finally {
            adminApproveButton.disabled = false;
            adminDeclineButton.disabled = false;
        }
    }

    
    // --- UI HELPER FUNCTIONS ---

    function openDealInfoModal(dealData) { /* ... (same as before) ... */ }

    function closeModal(modalElement) {
        if (modalElement) {
            modalElement.classList.add('hidden');
        }
    }
    
    function showStatus(element, message) { /* ... (same as before) ... */ }
    function showSuccess(element, message) { /* ... (same as before) ... */ }
    function showError(element, message) { /* ... (same as before) ... */ }
});