import { Component, inject, OnInit } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { ApiService, Project } from '../../services/api.service';

@Component({
  selector: 'app-projects',
  standalone: true,
  imports: [CommonModule, FormsModule],
  template: `
    <div class="projects-container">
      <div class="toolbar">
        <h2>Projects</h2>
        <div class="toolbar-actions">
          <button class="btn btn-primary" (click)="createProject()">
            New Project
          </button>
          <button class="btn btn-secondary" disabled>
            Import Project
          </button>
          <input
            type="text"
            placeholder="Search projects..."
            [(ngModel)]="searchTerm"
            (input)="filterProjects()"
            class="search-input"
          >
          <label class="checkbox-label">
            <input
              type="checkbox"
              [(ngModel)]="showDeleted"
              (change)="loadProjects()"
            >
            Display Deleted
          </label>
          <div class="view-toggle">
            <button [class.active]="viewMode === 'card'" (click)="viewMode = 'card'">
              Card
            </button>
            <button [class.active]="viewMode === 'list'" (click)="viewMode = 'list'">
              List
            </button>
          </div>
        </div>
      </div>

      @if (loading) {
        <div class="loading">
          <span class="spinner"></span> Loading projects...
        </div>
      } @else if (filteredProjects.length === 0) {
        <div class="empty-state">
          <p>No projects found.</p>
          <button class="btn btn-primary" (click)="createProject()">
            Create your first project
          </button>
        </div>
      } @else {
        @if (viewMode === 'card') {
          <div class="project-cards">
            @for (project of filteredProjects; track project.id) {
              <div class="project-card" [class.disabled]="!project.enabled" [class.deleted]="project.deleted">
                <div class="project-icon">🛩️</div>
                <h3>{{ project.name }}</h3>
                <p>{{ project.caption || 'No description' }}</p>
                <div class="project-meta">
                  <span>Versions: {{ project.versions.length || 0 }} ({{ getPublishedCount(project) }} published)</span>
                  <span>Status: {{ project.enabled ? '✓ Enabled' : '✗ Disabled' }}</span>
                  <span>Last update: {{ getRelativeTime(project.last_update_date) }}</span>
                </div>
                <div class="project-actions">
                  <button class="btn btn-secondary" (click)="editProject(project)">Edit</button>
                  <button class="btn btn-secondary" (click)="manageVersions(project)">Versions</button>
                  <button class="btn btn-secondary" (click)="exportProject(project)">Export</button>
                  <button class="btn btn-secondary" (click)="toggleProject(project)">
                    {{ project.enabled ? 'Disable' : 'Enable' }}
                  </button>
                </div>
              </div>
            }
          </div>
        } @else {
          <table class="table">
            <thead>
              <tr>
                <th>Name</th>
                <th>Caption</th>
                <th>Versions</th>
                <th>Enabled</th>
                <th>Deleted</th>
                <th>Last Update</th>
                <th>Actions</th>
              </tr>
            </thead>
            <tbody>
              @for (project of filteredProjects; track project.id) {
                <tr [class.deleted]="project.deleted">
                  <td>{{ project.name }}</td>
                  <td>{{ project.caption || '-' }}</td>
                  <td>{{ project.versions.length || 0 }} ({{ getPublishedCount(project) }} published)</td>
                  <td>
                    @if (project.enabled) {
                      <span class="status-badge enabled">✓</span>
                    } @else {
                      <span class="status-badge">✗</span>
                    }
                  </td>
                  <td>
                    @if (project.deleted) {
                      <span class="status-badge deleted">✓</span>
                    } @else {
                      <span class="status-badge">✗</span>
                    }
                  </td>
                  <td>{{ getRelativeTime(project.last_update_date) }}</td>
                  <td class="actions">
                    <button class="action-btn" title="Edit" (click)="editProject(project)">🖊️</button>
                    <button class="action-btn" title="Versions" (click)="manageVersions(project)">📋</button>
                    <button class="action-btn" title="Export" (click)="exportProject(project)">📤</button>
                    @if (!project.deleted) {
                      <button class="action-btn danger" title="Delete" (click)="deleteProject(project)">🗑️</button>
                    }
                  </td>
                </tr>
              }
            </tbody>
          </table>
        }
      }

      @if (message) {
        <div class="alert" [class.alert-success]="!isError" [class.alert-danger]="isError">
          {{ message }}
        </div>
      }
    </div>
  `,
  styles: [`
    .projects-container {
      .toolbar {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 1.5rem;

        h2 {
          margin: 0;
        }

        .toolbar-actions {
          display: flex;
          gap: 0.5rem;
          align-items: center;
        }
      }

      .search-input {
        padding: 0.375rem 0.75rem;
        border: 1px solid #ced4da;
        border-radius: 0.25rem;
        width: 200px;
      }

      .checkbox-label {
        display: flex;
        align-items: center;
        gap: 0.25rem;
        cursor: pointer;
      }

      .view-toggle {
        display: flex;
        border: 1px solid #ced4da;
        border-radius: 0.25rem;
        overflow: hidden;

        button {
          background: white;
          border: none;
          padding: 0.375rem 0.75rem;
          cursor: pointer;

          &.active {
            background-color: #007bff;
            color: white;
          }
        }
      }

      .loading, .empty-state {
        text-align: center;
        padding: 3rem;
        background-color: white;
        border-radius: 0.25rem;

        p {
          margin-bottom: 1rem;
          color: #6c757d;
        }
      }

      .project-cards {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
        gap: 1rem;
      }

      .project-card {
        background: white;
        border: 1px solid #dee2e6;
        border-radius: 0.5rem;
        padding: 1.5rem;

        &:hover {
          box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
        }

        &.disabled {
          opacity: 0.7;
        }

        &.deleted {
          background-color: #f8f9fa;
        }

        .project-icon {
          font-size: 2rem;
          margin-bottom: 0.5rem;
        }

        h3 {
          margin: 0 0 0.5rem 0;
          font-size: 1.25rem;
        }

        p {
          color: #6c757d;
          margin-bottom: 1rem;
        }

        .project-meta {
          font-size: 0.875rem;
          color: #6c757d;
          margin-bottom: 1rem;

          span {
            display: block;
            margin-bottom: 0.25rem;
          }
        }

        .project-actions {
          display: flex;
          gap: 0.5rem;
          flex-wrap: wrap;

          button {
            flex: 1;
            min-width: 80px;
            font-size: 0.875rem;
            padding: 0.375rem 0.5rem;
          }
        }
      }

      .status-badge {
        &.enabled { color: #28a745; }
        &.deleted { color: #dc3545; }
      }

      .actions {
        display: flex;
        gap: 0.25rem;
      }

      .action-btn {
        background: none;
        border: none;
        cursor: pointer;
        font-size: 1.1rem;
        padding: 0.25rem;
        border-radius: 0.25rem;

        &:hover {
          background-color: #f8f9fa;
        }

        &.danger:hover {
          background-color: #f8d7da;
        }
      }

      tr.deleted {
        opacity: 0.6;
        background-color: #f8f9fa;
      }
    }
  `]
})
export class ProjectsComponent implements OnInit {
  private apiService = inject(ApiService);

  projects: Project[] = [];
  filteredProjects: Project[] = [];
  loading = true;
  showDeleted = false;
  searchTerm = '';
  viewMode: 'card' | 'list' = 'card';
  message = '';
  isError = false;

  ngOnInit() {
    this.loadProjects();
  }

  loadProjects() {
    this.loading = true;
    this.apiService.getProjects(this.showDeleted).subscribe({
      next: (projects) => {
        this.projects = projects;
        this.filterProjects();
        this.loading = false;
      },
      error: (err) => {
        this.showMessage('Failed to load projects', true);
        this.loading = false;
      }
    });
  }

  filterProjects() {
    const term = this.searchTerm.toLowerCase();
    this.filteredProjects = this.projects.filter(project =>
      project.name.toLowerCase().includes(term) ||
      (project.caption || '').toLowerCase().includes(term)
    );
  }

  getPublishedCount(project: Project): number {
    return project.versions.filter(v => v.published).length || 0;
  }

  getRelativeTime(timestamp: string): string {
    const date = new Date(timestamp);
    const now = new Date();
    const diff = now.getTime() - date.getTime();

    const minutes = Math.floor(diff / 60000);
    const hours = Math.floor(diff / 3600000);
    const days = Math.floor(diff / 86400000);

    if (minutes < 1) return 'just now';
    if (minutes < 60) return `${minutes} min ago`;
    if (hours < 24) return `${hours} hour${hours > 1 ? 's' : ''} ago`;
    return `${days} day${days > 1 ? 's' : ''} ago`;
  }

  createProject() {
    // TODO: Open create dialog
    console.log('Create project - not implemented yet');
  }

  editProject(project: Project) {
    // TODO: Open edit dialog
    console.log('Edit project:', project.name);
  }

  manageVersions(project: Project) {
    // TODO: Open versions dialog
    console.log('Manage versions:', project.name);
  }

  exportProject(project: Project) {
    this.apiService.exportProject(project.id).subscribe({
      next: (data) => {
        const blob = new Blob([JSON.stringify(data, null, 2)], { type: 'application/json' });
        const url = window.URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = `${project.name}_export.json`;
        a.click();
        window.URL.revokeObjectURL(url);
        this.showMessage(`Project "${project.name}" exported successfully`, false);
      },
      error: (err) => {
        this.showMessage('Failed to export project', true);
      }
    });
  }

  toggleProject(project: Project) {
    this.apiService.toggleProject(project.id).subscribe({
      next: (result) => {
        project.enabled = result.enabled;
        this.showMessage(`Project "${project.name}" ${result.enabled ? 'enabled' : 'disabled'}`, false);
      },
      error: (err) => {
        this.showMessage('Failed to toggle project', true);
      }
    });
  }

  deleteProject(project: Project) {
    if (confirm(`Are you sure you want to delete "${project.name}"?`)) {
      this.apiService.deleteProject(project.id).subscribe({
        next: () => {
          this.showMessage(`Project "${project.name}" deleted successfully`, false);
          this.loadProjects();
        },
        error: (err) => {
          this.showMessage(err.error?.detail || 'Failed to delete project', true);
        }
      });
    }
  }

  private showMessage(message: string, isError: boolean) {
    this.message = message;
    this.isError = isError;

    setTimeout(() => {
      this.message = '';
    }, 5000);
  }
}