/**
 * @file sdig-collaboration-sidebar.ts
 * @description Compact collaboration sidebar for the contract editor
 */

import {
  DeesElement,
  property,
  html,
  customElement,
  type TemplateResult,
  css,
  cssManager,
  state,
} from '@design.estate/dees-element';

import * as plugins from '../../plugins.js';

declare global {
  interface HTMLElementTagNameMap {
    'sdig-collaboration-sidebar': SdigCollaborationSidebar;
  }
}

// Comment interface
interface IComment {
  id: string;
  userId: string;
  userName: string;
  userColor: string;
  content: string;
  createdAt: number;
  updatedAt?: number;
  anchorPath?: string;
  anchorText?: string;
  resolved: boolean;
  replies: IComment[];
}

// Suggestion interface
interface ISuggestion {
  id: string;
  userId: string;
  userName: string;
  userColor: string;
  originalText: string;
  suggestedText: string;
  path: string;
  status: 'pending' | 'accepted' | 'rejected';
  createdAt: number;
}

// Presence interface
interface IPresence {
  userId: string;
  userName: string;
  userColor: string;
  currentSection: string;
  cursorPosition?: { path: string; offset: number };
  lastActive: number;
}

@customElement('sdig-collaboration-sidebar')
export class SdigCollaborationSidebar extends DeesElement {
  // ============================================================================
  // STATIC
  // ============================================================================

  public static demo = () => html`
    <div style="width: 320px; height: 600px; border: 1px solid #ccc;">
      <sdig-collaboration-sidebar
        .contract=${plugins.sdDemodata.demoContract}
      ></sdig-collaboration-sidebar>
    </div>
  `;

  public static styles = [
    cssManager.defaultStyles,
    css`
      :host {
        display: block;
        height: 100%;
        overflow: hidden;
      }

      .sidebar-container {
        display: flex;
        flex-direction: column;
        height: 100%;
      }

      /* Presence bar */
      .presence-bar {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 16px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border-bottom: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
      }

      .presence-avatars {
        display: flex;
        align-items: center;
      }

      .presence-avatar {
        width: 28px;
        height: 28px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 11px;
        font-weight: 600;
        color: white;
        margin-left: -6px;
        border: 2px solid ${cssManager.bdTheme('#f9fafb', '#111111')};
        cursor: pointer;
        position: relative;
      }

      .presence-avatar:first-child {
        margin-left: 0;
      }

      .presence-avatar .status-dot {
        position: absolute;
        bottom: -1px;
        right: -1px;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: #10b981;
        border: 2px solid ${cssManager.bdTheme('#f9fafb', '#111111')};
      }

      .presence-avatar .status-dot.away {
        background: #f59e0b;
      }

      .presence-count {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 28px;
        height: 28px;
        border-radius: 50%;
        background: ${cssManager.bdTheme('#e5e7eb', '#3f3f46')};
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        font-size: 11px;
        font-weight: 600;
        margin-left: -6px;
        border: 2px solid ${cssManager.bdTheme('#f9fafb', '#111111')};
      }

      .presence-label {
        font-size: 12px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      /* Scrollable content */
      .sidebar-content {
        flex: 1;
        overflow-y: auto;
        padding: 12px;
      }

      /* Collapsible sections */
      .collapsible-section {
        margin-bottom: 12px;
        border: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        border-radius: 8px;
        overflow: hidden;
        background: ${cssManager.bdTheme('#ffffff', '#0a0a0a')};
      }

      .section-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 10px 12px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        cursor: pointer;
        user-select: none;
        transition: background 0.15s ease;
      }

      .section-header:hover {
        background: ${cssManager.bdTheme('#f3f4f6', '#18181b')};
      }

      .section-title {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 600;
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
      }

      .section-title dees-icon {
        font-size: 14px;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
      }

      .section-badge {
        padding: 2px 6px;
        border-radius: 9999px;
        font-size: 10px;
        font-weight: 600;
        background: ${cssManager.bdTheme('#dbeafe', '#1e3a5f')};
        color: ${cssManager.bdTheme('#1e40af', '#93c5fd')};
      }

      .section-chevron {
        font-size: 14px;
        color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
        transition: transform 0.2s ease;
      }

      .section-chevron.expanded {
        transform: rotate(180deg);
      }

      .section-body {
        padding: 0;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.2s ease, padding 0.2s ease;
      }

      .section-body.expanded {
        padding: 12px;
        max-height: 1000px;
      }

      /* Compact comment cards */
      .comment-card {
        display: flex;
        gap: 10px;
        padding: 10px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border-radius: 6px;
        margin-bottom: 8px;
        cursor: pointer;
        transition: background 0.15s ease;
      }

      .comment-card:last-child {
        margin-bottom: 0;
      }

      .comment-card:hover {
        background: ${cssManager.bdTheme('#f3f4f6', '#18181b')};
      }

      .comment-card.resolved {
        opacity: 0.6;
      }

      .comment-avatar {
        width: 24px;
        height: 24px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 10px;
        font-weight: 600;
        color: white;
        flex-shrink: 0;
      }

      .comment-body {
        flex: 1;
        min-width: 0;
      }

      .comment-meta {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-bottom: 4px;
      }

      .comment-author {
        font-size: 12px;
        font-weight: 600;
        color: ${cssManager.bdTheme('#374151', '#d1d5db')};
      }

      .comment-time {
        font-size: 10px;
        color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
      }

      .comment-preview {
        font-size: 12px;
        line-height: 1.4;
        color: ${cssManager.bdTheme('#6b7280', '#9ca3af')};
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
      }

      .comment-replies {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        font-size: 10px;
        color: ${cssManager.bdTheme('#3b82f6', '#60a5fa')};
        margin-top: 4px;
      }

      .comment-replies dees-icon {
        font-size: 12px;
      }

      /* Suggestion cards */
      .suggestion-card {
        padding: 10px;
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
        border-radius: 6px;
        margin-bottom: 8px;
        cursor: pointer;
        transition: background 0.15s ease;
      }

      .suggestion-card:last-child {
        margin-bottom: 0;
      }

      .suggestion-card:hover {
        background: ${cssManager.bdTheme('#f3f4f6', '#18181b')};
      }

      .suggestion-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 8px;
      }

      .suggestion-user {
        display: flex;
        align-items: center;
        gap: 6px;
      }

      .suggestion-status {
        display: flex;
        align-items: center;
        gap: 4px;
        padding: 2px 6px;
        border-radius: 9999px;
        font-size: 10px;
        font-weight: 500;
      }

      .suggestion-status dees-icon {
        font-size: 10px;
      }

      .suggestion-status.pending {
        background: ${cssManager.bdTheme('#fef3c7', '#422006')};
        color: ${cssManager.bdTheme('#92400e', '#fcd34d')};
      }

      .suggestion-status.accepted {
        background: ${cssManager.bdTheme('#d1fae5', '#064e3b')};
        color: ${cssManager.bdTheme('#065f46', '#6ee7b7')};
      }

      .suggestion-status.rejected {
        background: ${cssManager.bdTheme('#fee2e2', '#450a0a')};
        color: ${cssManager.bdTheme('#991b1b', '#fca5a5')};
      }

      .suggestion-diff {
        font-family: 'Roboto Mono', monospace;
        font-size: 11px;
        line-height: 1.4;
      }

      .diff-removed {
        background: ${cssManager.bdTheme('#fee2e2', '#450a0a')};
        color: ${cssManager.bdTheme('#991b1b', '#fca5a5')};
        text-decoration: line-through;
        padding: 1px 3px;
        border-radius: 2px;
      }

      .diff-added {
        background: ${cssManager.bdTheme('#d1fae5', '#064e3b')};
        color: ${cssManager.bdTheme('#065f46', '#6ee7b7')};
        padding: 1px 3px;
        border-radius: 2px;
      }

      /* Quick add comment */
      .quick-add {
        padding: 12px;
        border-top: 1px solid ${cssManager.bdTheme('#e5e5e5', '#27272a')};
        background: ${cssManager.bdTheme('#f9fafb', '#111111')};
      }

      .quick-add-input {
        width: 100%;
        padding: 10px 12px;
        font-size: 13px;
        color: ${cssManager.bdTheme('#111111', '#fafafa')};
        background: ${cssManager.bdTheme('#ffffff', '#0a0a0a')};
        border: 1px solid ${cssManager.bdTheme('#d1d5db', '#3f3f46')};
        border-radius: 6px;
        outline: none;
        resize: none;
        min-height: 60px;
        font-family: inherit;
        box-sizing: border-box;
      }

      .quick-add-input:focus {
        border-color: ${cssManager.bdTheme('#3b82f6', '#60a5fa')};
        box-shadow: 0 0 0 3px ${cssManager.bdTheme('rgba(59, 130, 246, 0.1)', 'rgba(96, 165, 250, 0.1)')};
      }

      .quick-add-input::placeholder {
        color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
      }

      .quick-add-actions {
        display: flex;
        justify-content: flex-end;
        margin-top: 8px;
      }

      .btn {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 12px;
        font-size: 12px;
        font-weight: 500;
        border-radius: 6px;
        border: none;
        cursor: pointer;
        transition: all 0.15s ease;
      }

      .btn-primary {
        background: ${cssManager.bdTheme('#111111', '#fafafa')};
        color: ${cssManager.bdTheme('#ffffff', '#09090b')};
      }

      .btn-primary:hover {
        background: ${cssManager.bdTheme('#333333', '#e5e5e5')};
      }

      .btn-primary:disabled {
        opacity: 0.5;
        cursor: not-allowed;
      }

      /* Empty state */
      .empty-state {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 24px 16px;
        text-align: center;
        color: ${cssManager.bdTheme('#9ca3af', '#6b7280')};
      }

      .empty-state dees-icon {
        font-size: 32px;
        margin-bottom: 8px;
        opacity: 0.5;
      }

      .empty-state p {
        margin: 0;
        font-size: 12px;
      }
    `,
  ];

  // ============================================================================
  // PROPERTIES
  // ============================================================================

  @property({ type: Object })
  public accessor contract: plugins.sdInterfaces.IPortableContract | null = null;

  @property({ type: Boolean })
  public accessor readonly: boolean = false;

  // ============================================================================
  // STATE
  // ============================================================================

  @state()
  private accessor commentsExpanded: boolean = true;

  @state()
  private accessor suggestionsExpanded: boolean = true;

  @state()
  private accessor newCommentText: string = '';

  // Demo presence data
  @state()
  private accessor presenceList: IPresence[] = [
    { userId: '1', userName: 'Alice Smith', userColor: '#3b82f6', currentSection: 'content', lastActive: Date.now() },
    { userId: '2', userName: 'Bob Johnson', userColor: '#10b981', currentSection: 'parties', lastActive: Date.now() - 60000 },
    { userId: '3', userName: 'Carol Davis', userColor: '#f59e0b', currentSection: 'terms', lastActive: Date.now() - 300000 },
  ];

  // Demo comments data
  @state()
  private accessor comments: IComment[] = [
    {
      id: '1',
      userId: '1',
      userName: 'Alice Smith',
      userColor: '#3b82f6',
      content: 'Can we clarify the payment terms in paragraph 3? The current wording seems ambiguous.',
      createdAt: Date.now() - 3600000,
      anchorPath: 'paragraphs.2',
      anchorText: 'Compensation',
      resolved: false,
      replies: [
        {
          id: '1-1',
          userId: '2',
          userName: 'Bob Johnson',
          userColor: '#10b981',
          content: 'Good point. I\'ll update the wording to be more specific.',
          createdAt: Date.now() - 1800000,
          resolved: false,
          replies: [],
        },
      ],
    },
    {
      id: '2',
      userId: '3',
      userName: 'Carol Davis',
      userColor: '#f59e0b',
      content: 'The termination clause needs to comply with the latest regulations.',
      createdAt: Date.now() - 86400000,
      resolved: true,
      replies: [],
    },
    {
      id: '3',
      userId: '2',
      userName: 'Bob Johnson',
      userColor: '#10b981',
      content: 'Should we add an automatic renewal clause?',
      createdAt: Date.now() - 7200000,
      resolved: false,
      replies: [],
    },
  ];

  // Demo suggestions data
  @state()
  private accessor suggestions: ISuggestion[] = [
    {
      id: '1',
      userId: '1',
      userName: 'Alice Smith',
      userColor: '#3b82f6',
      originalText: 'monthly salary',
      suggestedText: 'monthly gross salary',
      path: 'paragraphs.2.content',
      status: 'pending',
      createdAt: Date.now() - 7200000,
    },
    {
      id: '2',
      userId: '3',
      userName: 'Carol Davis',
      userColor: '#f59e0b',
      originalText: '30 days',
      suggestedText: '60 days',
      path: 'paragraphs.5.content',
      status: 'pending',
      createdAt: Date.now() - 3600000,
    },
  ];

  // ============================================================================
  // EVENT HANDLERS
  // ============================================================================

  private handleCommentClick(comment: IComment) {
    this.dispatchEvent(
      new CustomEvent('comment-click', {
        detail: { comment },
        bubbles: true,
        composed: true,
      })
    );
  }

  private handleSuggestionClick(suggestion: ISuggestion) {
    this.dispatchEvent(
      new CustomEvent('suggestion-click', {
        detail: { suggestion },
        bubbles: true,
        composed: true,
      })
    );
  }

  private handleAddComment() {
    if (!this.newCommentText.trim()) return;

    const newComment: IComment = {
      id: `comment-${Date.now()}`,
      userId: 'current-user',
      userName: 'You',
      userColor: '#6366f1',
      content: this.newCommentText,
      createdAt: Date.now(),
      resolved: false,
      replies: [],
    };

    this.comments = [newComment, ...this.comments];
    this.newCommentText = '';

    this.dispatchEvent(
      new CustomEvent('add-comment', {
        detail: { comment: newComment },
        bubbles: true,
        composed: true,
      })
    );
  }

  // ============================================================================
  // HELPERS
  // ============================================================================

  private formatTimeAgo(timestamp: number): string {
    const seconds = Math.floor((Date.now() - timestamp) / 1000);
    if (seconds < 60) return 'now';
    const minutes = Math.floor(seconds / 60);
    if (minutes < 60) return `${minutes}m`;
    const hours = Math.floor(minutes / 60);
    if (hours < 24) return `${hours}h`;
    const days = Math.floor(hours / 24);
    return `${days}d`;
  }

  private getActivePresence(): IPresence[] {
    const fiveMinutesAgo = Date.now() - 300000;
    return this.presenceList.filter((p) => p.lastActive > fiveMinutesAgo);
  }

  private getOpenComments(): IComment[] {
    return this.comments.filter((c) => !c.resolved);
  }

  private getPendingSuggestions(): ISuggestion[] {
    return this.suggestions.filter((s) => s.status === 'pending');
  }

  // ============================================================================
  // RENDER
  // ============================================================================

  public render(): TemplateResult {
    const activePresence = this.getActivePresence();
    const openComments = this.getOpenComments();
    const pendingSuggestions = this.getPendingSuggestions();

    return html`
      <div class="sidebar-container">
        <!-- Presence Bar -->
        <div class="presence-bar">
          <div class="presence-avatars">
            ${activePresence.slice(0, 3).map(
              (p) => html`
                <div
                  class="presence-avatar"
                  style="background: ${p.userColor}"
                  title="${p.userName} - ${p.currentSection}"
                >
                  ${p.userName.charAt(0)}
                  <span class="status-dot ${Date.now() - p.lastActive > 60000 ? 'away' : ''}"></span>
                </div>
              `
            )}
            ${activePresence.length > 3
              ? html`<div class="presence-count">+${activePresence.length - 3}</div>`
              : ''}
          </div>
          <span class="presence-label">${activePresence.length} active</span>
        </div>

        <!-- Scrollable Content -->
        <div class="sidebar-content">
          <!-- Comments Section -->
          <div class="collapsible-section">
            <div
              class="section-header"
              @click=${() => (this.commentsExpanded = !this.commentsExpanded)}
            >
              <div class="section-title">
                <dees-icon .icon=${'lucide:MessageCircle'}></dees-icon>
                Comments
                ${openComments.length > 0
                  ? html`<span class="section-badge">${openComments.length}</span>`
                  : ''}
              </div>
              <dees-icon
                class="section-chevron ${this.commentsExpanded ? 'expanded' : ''}"
                .icon=${'lucide:ChevronDown'}
              ></dees-icon>
            </div>
            <div class="section-body ${this.commentsExpanded ? 'expanded' : ''}">
              ${this.comments.length > 0
                ? this.comments.slice(0, 5).map((comment) => this.renderCommentCard(comment))
                : html`
                    <div class="empty-state">
                      <dees-icon .icon=${'lucide:MessageSquare'}></dees-icon>
                      <p>No comments yet</p>
                    </div>
                  `}
            </div>
          </div>

          <!-- Suggestions Section -->
          <div class="collapsible-section">
            <div
              class="section-header"
              @click=${() => (this.suggestionsExpanded = !this.suggestionsExpanded)}
            >
              <div class="section-title">
                <dees-icon .icon=${'lucide:GitPullRequest'}></dees-icon>
                Suggestions
                ${pendingSuggestions.length > 0
                  ? html`<span class="section-badge">${pendingSuggestions.length}</span>`
                  : ''}
              </div>
              <dees-icon
                class="section-chevron ${this.suggestionsExpanded ? 'expanded' : ''}"
                .icon=${'lucide:ChevronDown'}
              ></dees-icon>
            </div>
            <div class="section-body ${this.suggestionsExpanded ? 'expanded' : ''}">
              ${this.suggestions.length > 0
                ? this.suggestions.slice(0, 5).map((suggestion) => this.renderSuggestionCard(suggestion))
                : html`
                    <div class="empty-state">
                      <dees-icon .icon=${'lucide:Edit3'}></dees-icon>
                      <p>No suggestions yet</p>
                    </div>
                  `}
            </div>
          </div>
        </div>

        <!-- Quick Add Comment -->
        ${!this.readonly
          ? html`
              <div class="quick-add">
                <textarea
                  class="quick-add-input"
                  placeholder="Add a comment..."
                  .value=${this.newCommentText}
                  @input=${(e: Event) => (this.newCommentText = (e.target as HTMLTextAreaElement).value)}
                ></textarea>
                <div class="quick-add-actions">
                  <button
                    class="btn btn-primary"
                    @click=${this.handleAddComment}
                    ?disabled=${!this.newCommentText.trim()}
                  >
                    <dees-icon .icon=${'lucide:Send'}></dees-icon>
                    Add
                  </button>
                </div>
              </div>
            `
          : ''}
      </div>
    `;
  }

  private renderCommentCard(comment: IComment): TemplateResult {
    return html`
      <div
        class="comment-card ${comment.resolved ? 'resolved' : ''}"
        @click=${() => this.handleCommentClick(comment)}
      >
        <div class="comment-avatar" style="background: ${comment.userColor}">
          ${comment.userName.charAt(0)}
        </div>
        <div class="comment-body">
          <div class="comment-meta">
            <span class="comment-author">${comment.userName}</span>
            <span class="comment-time">${this.formatTimeAgo(comment.createdAt)}</span>
          </div>
          <div class="comment-preview">${comment.content}</div>
          ${comment.replies.length > 0
            ? html`
                <div class="comment-replies">
                  <dees-icon .icon=${'lucide:MessageSquare'}></dees-icon>
                  ${comment.replies.length} ${comment.replies.length === 1 ? 'reply' : 'replies'}
                </div>
              `
            : ''}
        </div>
      </div>
    `;
  }

  private renderSuggestionCard(suggestion: ISuggestion): TemplateResult {
    return html`
      <div class="suggestion-card" @click=${() => this.handleSuggestionClick(suggestion)}>
        <div class="suggestion-header">
          <div class="suggestion-user">
            <div class="comment-avatar" style="background: ${suggestion.userColor}; width: 20px; height: 20px; font-size: 9px;">
              ${suggestion.userName.charAt(0)}
            </div>
            <span class="comment-author">${suggestion.userName}</span>
          </div>
          <div class="suggestion-status ${suggestion.status}">
            <dees-icon .icon=${suggestion.status === 'pending' ? 'lucide:Clock' : suggestion.status === 'accepted' ? 'lucide:Check' : 'lucide:X'}></dees-icon>
            ${suggestion.status}
          </div>
        </div>
        <div class="suggestion-diff">
          <span class="diff-removed">${suggestion.originalText}</span>
          <span> → </span>
          <span class="diff-added">${suggestion.suggestedText}</span>
        </div>
      </div>
    `;
  }
}