/**
 * @copyright NHCarrigan
 * @license Naomi's Public License
 * @author Naomi Carrigan
 */
import { Component, Input, Output, EventEmitter, signal, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import type { Comment } from '@library/shared-types';
import { AuthService } from '../../services/auth.service';
import { SanitizeService } from '../../services/sanitize.service';
import { ReportModalComponent } from '../report-modal/report-modal.component';

@Component({
  selector: 'app-comment-display',
  standalone: true,
  imports: [CommonModule, FormsModule, ReportModalComponent],
  template: `
    <div class="comments-section">
      @if (comments().length > 0) {
        @for (comment of comments(); track comment.id) {
          <div class="comment">
            <div class="comment-header">
              @if (comment.user.avatar) {
                <img [src]="comment.user.avatar" [alt]="comment.user.username" class="comment-avatar">
              }
              <span class="comment-author">{{ comment.user.username }}</span>
              @if (comment.user.inDiscord) {
                <span class="discord-badge">Discord</span>
              }
              @if (comment.user.isVip) {
                <span class="vip-badge">VIP</span>
              }
              @if (comment.user.isMod) {
                <span class="mod-badge">Mod</span>
              }
              @if (comment.user.isStaff) {
                <span class="staff-badge">Staff</span>
              }
              <span class="comment-date">{{ formatDate(comment.createdAt) }}</span>
              @if (canEditComment(comment)) {
                <button (click)="startEdit(comment)" class="btn btn-secondary btn-xs">Edit</button>
              }
              @if (canDeleteComment(comment)) {
                <button (click)="onDelete.emit(comment.id)" class="btn btn-danger btn-xs">Delete</button>
              }
              @if (canReportComment(comment)) {
                <button (click)="openReportModal(comment)" class="btn btn-warning btn-xs">Report</button>
              }
            </div>
            @if (editingCommentId() === comment.id) {
              <div class="comment-edit-form">
                <textarea
                  [(ngModel)]="editCommentContent"
                  name="editComment"
                  rows="3"
                ></textarea>
                <div class="comment-edit-actions">
                  <button (click)="saveEdit(comment.id)" class="btn btn-primary btn-xs">Save</button>
                  <button (click)="cancelEdit()" class="btn btn-secondary btn-xs">Cancel</button>
                </div>
              </div>
            } @else {
              @if (comment.hasPendingReports) {
                <div class="comment-pending-review">[comment pending admin review]</div>
              } @else {
                <div class="comment-content" [innerHTML]="sanitizeService.sanitizeHtml(comment.content)"></div>
              }
            }
          </div>
        }
      } @else {
        <div class="no-comments">No comments yet. Be the first to comment!</div>
      }
    </div>

    @if (showReportModal()) {
      <app-report-modal
        [reportType]="'comment'"
        [targetId]="reportingCommentId()"
        (closeModal)="closeReportModal()"
      />
    }
  `,
  styles: [`
    .comments-section {
      margin-top: 1rem;
    }

    .comment {
      background: #f9fafb;
      padding: 0.75rem;
      border-radius: 0.375rem;
      margin-bottom: 0.75rem;
    }

    .comment-header {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      margin-bottom: 0.5rem;
      flex-wrap: wrap;
    }

    .comment-avatar {
      width: 2rem;
      height: 2rem;
      border-radius: 50%;
      object-fit: cover;
    }

    .comment-author {
      font-weight: 600;
      color: #1f2937;
    }

    .discord-badge,
    .vip-badge,
    .mod-badge,
    .staff-badge {
      padding: 0.125rem 0.5rem;
      border-radius: 0.25rem;
      font-size: 0.75rem;
      font-weight: 600;
    }

    .discord-badge {
      background: #5865f2;
      color: white;
    }

    .vip-badge {
      background: #fbbf24;
      color: #78350f;
    }

    .mod-badge {
      background: #10b981;
      color: white;
    }

    .staff-badge {
      background: #8b5cf6;
      color: white;
    }

    .comment-date {
      font-size: 0.75rem;
      color: #6b7280;
    }

    .comment-content {
      font-size: 0.9rem;
      color: #4b5563;
    }

    .comment-pending-review {
      font-size: 0.9rem;
      color: #9b59b6;
      font-style: italic;
      padding: 0.5rem;
      background: #f3e8ff;
      border-radius: 0.25rem;
    }

    .comment-edit-form {
      margin-top: 0.5rem;
    }

    .comment-edit-form textarea {
      width: 100%;
      padding: 0.5rem;
      border: 1px solid #d1d5db;
      border-radius: 0.375rem;
      font-family: inherit;
      resize: vertical;
    }

    .comment-edit-actions {
      display: flex;
      gap: 0.5rem;
      margin-top: 0.5rem;
    }

    .no-comments {
      text-align: center;
      color: #6b7280;
      padding: 2rem;
      font-style: italic;
    }

    .btn {
      padding: 0.25rem 0.75rem;
      border: none;
      border-radius: 0.25rem;
      cursor: pointer;
      font-size: 0.875rem;
      transition: all 0.2s;
    }

    .btn-xs {
      padding: 0.125rem 0.5rem;
      font-size: 0.75rem;
    }

    .btn-primary {
      background: #3b82f6;
      color: white;
    }

    .btn-primary:hover {
      background: #2563eb;
    }

    .btn-secondary {
      background: #6b7280;
      color: white;
    }

    .btn-secondary:hover {
      background: #4b5563;
    }

    .btn-danger {
      background: #ef4444;
      color: white;
    }

    .btn-danger:hover {
      background: #dc2626;
    }

    .btn-warning {
      background: #f59e0b;
      color: white;
    }

    .btn-warning:hover {
      background: #d97706;
    }
  `]
})
export class CommentDisplayComponent {
  private readonly authService = inject(AuthService);
  readonly sanitizeService = inject(SanitizeService);

  @Input({ required: true }) comments = signal<Comment[]>([]);
  @Output() onEdit = new EventEmitter<{ commentId: string; content: string }>();
  @Output() onDelete = new EventEmitter<string>();

  editingCommentId = signal<string | null>(null);
  editCommentContent = '';
  showReportModal = signal(false);
  reportingCommentId = signal<string>('');

  formatDate(date: Date | string): string {
    const d = new Date(date);
    return d.toLocaleDateString('en-GB', {
      year: 'numeric',
      month: 'short',
      day: 'numeric',
      hour: '2-digit',
      minute: '2-digit',
    });
  }

  canEditComment(comment: Comment): boolean {
    const user = this.authService.user();
    if (!user) return false;
    return comment.userId === user.id || this.authService.isAdmin();
  }

  canDeleteComment(comment: Comment): boolean {
    const user = this.authService.user();
    if (!user) return false;
    return comment.userId === user.id || this.authService.isAdmin();
  }

  canReportComment(comment: Comment): boolean {
    const user = this.authService.user();
    if (!user) return false;
    // Users can report comments they didn't write (but not their own)
    return comment.userId !== user.id;
  }

  startEdit(comment: Comment): void {
    this.editingCommentId.set(comment.id);
    this.editCommentContent = comment.rawContent ?? comment.content;
  }

  saveEdit(commentId: string): void {
    this.onEdit.emit({ commentId, content: this.editCommentContent });
    this.cancelEdit();
  }

  cancelEdit(): void {
    this.editingCommentId.set(null);
    this.editCommentContent = '';
  }

  openReportModal(comment: Comment): void {
    this.reportingCommentId.set(comment.id);
    this.showReportModal.set(true);
  }

  closeReportModal(): void {
    this.showReportModal.set(false);
    this.reportingCommentId.set('');
  }
}