// Pawprint Wrapper - Sidebar Logic

class PawprintSidebar {
  constructor() {
    this.config = null;
    this.currentUser = null;
    this.sidebar = null;
    this.toggleBtn = null;
  }

  async init() {
    // Load configuration
    await this.loadConfig();

    // Create sidebar elements
    this.createSidebar();
    this.createToggleButton();

    // Setup event listeners
    this.setupEventListeners();

    // Check if user is already logged in
    this.checkCurrentUser();

    // Load saved sidebar state
    this.loadSidebarState();
  }

  async loadConfig() {
    try {
      const response = await fetch('/wrapper/config.json');
      this.config = await response.json();
      console.log('[Pawprint] Config loaded:', this.config.nest_name);
    } catch (error) {
      console.error('[Pawprint] Failed to load config:', error);
      // Use default config
      this.config = {
        nest_name: 'default',
        wrapper: {
          environment: {
            backend_url: 'http://localhost:8000',
            frontend_url: 'http://localhost:3000'
          },
          users: []
        }
      };
    }
  }

  createSidebar() {
    const sidebar = document.createElement('div');
    sidebar.id = 'pawprint-sidebar';
    sidebar.innerHTML = this.getSidebarHTML();
    document.body.appendChild(sidebar);
    this.sidebar = sidebar;
  }

  createToggleButton() {
    const button = document.createElement('button');
    button.id = 'sidebar-toggle';
    button.innerHTML = '<span class="icon">◀</span>';
    button.title = 'Toggle Pawprint Sidebar (Ctrl+Shift+P)';
    document.body.appendChild(button);
    this.toggleBtn = button;
  }

  getSidebarHTML() {
    const users = this.config.wrapper.users || [];

    return `
      <div class="sidebar-header">
        <h2>🐾 Pawprint</h2>
        <div class="nest-name">${this.config.nest_name}</div>
      </div>

      <div class="sidebar-content">
        <div id="status-container"></div>

        <!-- Quick Login Panel -->
        <div class="panel">
          <h3>👤 Quick Login</h3>

          <div id="current-user-display" style="display: none;">
            <div class="current-user">
              Logged in as: <strong id="current-username"></strong>
              <button class="logout-btn" onclick="pawprintSidebar.logout()">
                Logout
              </button>
            </div>
          </div>

          <div class="user-cards">
            ${users.map(user => `
              <div class="user-card" data-user-id="${user.id}" onclick="pawprintSidebar.loginAs('${user.id}')">
                <div class="icon">${user.icon}</div>
                <div class="info">
                  <span class="label">${user.label}</span>
                  <span class="role">${user.role}</span>
                </div>
              </div>
            `).join('')}
          </div>
        </div>

        <!-- Environment Info Panel -->
        <div class="panel">
          <h3>🌍 Environment</h3>
          <div style="font-size: 12px; opacity: 0.8;">
            <div style="margin-bottom: 8px;">
              <strong>Backend:</strong><br>
              <code style="font-size: 11px;">${this.config.wrapper.environment.backend_url}</code>
            </div>
            <div>
              <strong>Frontend:</strong><br>
              <code style="font-size: 11px;">${this.config.wrapper.environment.frontend_url}</code>
            </div>
          </div>
        </div>
      </div>

      <div class="sidebar-footer">
        Pawprint Dev Tools
      </div>
    `;
  }

  setupEventListeners() {
    // Toggle button
    this.toggleBtn.addEventListener('click', () => this.toggle());

    // Keyboard shortcut: Ctrl+Shift+P
    document.addEventListener('keydown', (e) => {
      if (e.ctrlKey && e.shiftKey && e.key === 'P') {
        e.preventDefault();
        this.toggle();
      }
    });
  }

  toggle() {
    this.sidebar.classList.toggle('expanded');
    this.saveSidebarState();
  }

  saveSidebarState() {
    const isExpanded = this.sidebar.classList.contains('expanded');
    localStorage.setItem('pawprint_sidebar_expanded', isExpanded);
  }

  loadSidebarState() {
    const isExpanded = localStorage.getItem('pawprint_sidebar_expanded') === 'true';
    if (isExpanded) {
      this.sidebar.classList.add('expanded');
    }
  }

  showStatus(message, type = 'info') {
    const container = document.getElementById('status-container');
    const statusDiv = document.createElement('div');
    statusDiv.className = `status-message ${type}`;
    statusDiv.textContent = message;
    container.innerHTML = '';
    container.appendChild(statusDiv);

    // Auto-remove after 5 seconds
    setTimeout(() => {
      statusDiv.remove();
    }, 5000);
  }

  async loginAs(userId) {
    const user = this.config.wrapper.users.find(u => u.id === userId);
    if (!user) return;

    this.showStatus(`Logging in as ${user.label}... ⏳`, 'info');

    try {
      const backendUrl = this.config.wrapper.environment.backend_url;
      const response = await fetch(`${backendUrl}/api/token/`, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          username: user.username,
          password: user.password
        })
      });

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

      const data = await response.json();

      // Store tokens
      localStorage.setItem('access_token', data.access);
      localStorage.setItem('refresh_token', data.refresh);

      // Store user info
      localStorage.setItem('user_info', JSON.stringify({
        username: user.username,
        label: user.label,
        role: data.details?.role || user.role
      }));

      this.showStatus(`✓ Logged in as ${user.label}`, 'success');
      this.currentUser = user;
      this.updateCurrentUserDisplay();

      // Reload page after short delay
      setTimeout(() => {
        window.location.reload();
      }, 1000);

    } catch (error) {
      console.error('[Pawprint] Login error:', error);
      this.showStatus(`✗ Login failed: ${error.message}`, 'error');
    }
  }

  logout() {
    localStorage.removeItem('access_token');
    localStorage.removeItem('refresh_token');
    localStorage.removeItem('user_info');

    this.showStatus('✓ Logged out', 'success');
    this.currentUser = null;
    this.updateCurrentUserDisplay();

    // Reload page after short delay
    setTimeout(() => {
      window.location.reload();
    }, 1000);
  }

  checkCurrentUser() {
    const userInfo = localStorage.getItem('user_info');
    if (userInfo) {
      try {
        this.currentUser = JSON.parse(userInfo);
        this.updateCurrentUserDisplay();
      } catch (error) {
        console.error('[Pawprint] Failed to parse user info:', error);
      }
    }
  }

  updateCurrentUserDisplay() {
    const display = document.getElementById('current-user-display');
    const username = document.getElementById('current-username');

    if (this.currentUser) {
      display.style.display = 'block';
      username.textContent = this.currentUser.username;

      // Highlight active user card
      document.querySelectorAll('.user-card').forEach(card => {
        card.classList.remove('active');
      });

      const activeCard = document.querySelector(`.user-card[data-user-id="${this.getUserIdByUsername(this.currentUser.username)}"]`);
      if (activeCard) {
        activeCard.classList.add('active');
      }
    } else {
      display.style.display = 'none';
    }
  }

  getUserIdByUsername(username) {
    const user = this.config.wrapper.users.find(u => u.username === username);
    return user ? user.id : null;
  }
}

// Initialize sidebar when DOM is ready
const pawprintSidebar = new PawprintSidebar();

if (document.readyState === 'loading') {
  document.addEventListener('DOMContentLoaded', () => pawprintSidebar.init());
} else {
  pawprintSidebar.init();
}

console.log('[Pawprint] Sidebar script loaded');