/**
 * Alpine.js v3 global data initialization
 * Provides theme toggle, menu controls, sidebar sections, and page state
 */
function data() {
  // ─────────────────────────────────────────────────────────────────
  // Theme (dark mode) persistence
  // ─────────────────────────────────────────────────────────────────
  function getThemeFromLocalStorage() {
    if (window.localStorage.getItem('dark')) {
      return JSON.parse(window.localStorage.getItem('dark'))
    }
    return (
      !!window.matchMedia &&
      window.matchMedia('(prefers-color-scheme: dark)').matches
    )
  }

  function setThemeToLocalStorage(value) {
    window.localStorage.setItem('dark', value)
  }

  // ─────────────────────────────────────────────────────────────────
  // Sidebar sections persistence
  // ─────────────────────────────────────────────────────────────────
  const SIDEBAR_STORAGE_KEY = 'admin_sidebar_sections';

  // Default state: Platform Administration open, others closed
  const defaultSections = {
    superAdmin: true,  // Super admin section (only visible to super admins)
    platformAdmin: true,
    vendorOps: false,
    marketplace: false,
    billing: false,
    contentMgmt: false,
    devTools: false,
    platformHealth: false,
    monitoring: false,
    settingsSection: false
  };

  function getSidebarSectionsFromStorage() {
    try {
      const stored = window.localStorage.getItem(SIDEBAR_STORAGE_KEY);
      if (stored) {
        return { ...defaultSections, ...JSON.parse(stored) };
      }
    } catch (e) {
      console.warn('Failed to parse sidebar sections from localStorage:', e);
    }
    return { ...defaultSections };
  }

  function saveSidebarSectionsToStorage(sections) {
    try {
      window.localStorage.setItem(SIDEBAR_STORAGE_KEY, JSON.stringify(sections));
    } catch (e) {
      console.warn('Failed to save sidebar sections to localStorage:', e);
    }
  }

  // ─────────────────────────────────────────────────────────────────
  // Last visited page tracking (for redirect after login)
  // ─────────────────────────────────────────────────────────────────
  const LAST_PAGE_KEY = 'admin_last_visited_page';
  const currentPath = window.location.pathname;

  // Save current page (exclude login, logout, error pages)
  if (currentPath.startsWith('/admin/') &&
      !currentPath.includes('/login') &&
      !currentPath.includes('/logout') &&
      !currentPath.includes('/errors/')) {
    try {
      window.localStorage.setItem(LAST_PAGE_KEY, currentPath);
    } catch (e) {
      // Ignore storage errors
    }
  }

  // Helper to get admin profile from localStorage
  function getAdminProfileFromStorage() {
    try {
      // Check admin_user first (set by login), then adminProfile (legacy)
      const stored = window.localStorage.getItem('admin_user') ||
                     window.localStorage.getItem('adminProfile');
      if (stored) {
        return JSON.parse(stored);
      }
    } catch (e) {
      console.warn('Failed to parse admin profile from localStorage:', e);
    }
    return null;
  }

  // Map pages to their parent sections
  const pageSectionMap = {
    // Super Admin section
    'admin-users': 'superAdmin',
    // Platform Administration
    companies: 'platformAdmin',
    vendors: 'platformAdmin',
    messages: 'platformAdmin',
    // Vendor Operations (Products, Customers, Inventory, Orders, Shipping)
    'marketplace-products': 'vendorOps',
    'vendor-products': 'vendorOps',
    customers: 'vendorOps',
    inventory: 'vendorOps',
    orders: 'vendorOps',
    // Future: shipping will map to 'vendorOps'
    // Marketplace
    'marketplace-letzshop': 'marketplace',
    // Content Management
    'platform-homepage': 'contentMgmt',
    'content-pages': 'contentMgmt',
    'vendor-theme': 'contentMgmt',
    // Developer Tools
    components: 'devTools',
    icons: 'devTools',
    // Platform Health
    testing: 'platformHealth',
    'code-quality': 'platformHealth',
    // Platform Monitoring
    imports: 'monitoring',
    'background-tasks': 'monitoring',
    logs: 'monitoring',
    'notifications-settings': 'monitoring',
    // Platform Settings
    settings: 'settingsSection',
    profile: 'settingsSection',
    'api-keys': 'settingsSection'
  };

  return {
    // ─────────────────────────────────────────────────────────────────
    // Theme
    // ─────────────────────────────────────────────────────────────────
    dark: getThemeFromLocalStorage(),
    toggleTheme() {
      this.dark = !this.dark
      setThemeToLocalStorage(this.dark)
    },

    // ─────────────────────────────────────────────────────────────────
    // Mobile side menu
    // ─────────────────────────────────────────────────────────────────
    isSideMenuOpen: false,
    toggleSideMenu() {
      this.isSideMenuOpen = !this.isSideMenuOpen
    },
    closeSideMenu() {
      this.isSideMenuOpen = false
    },

    // ─────────────────────────────────────────────────────────────────
    // Notifications menu
    // ─────────────────────────────────────────────────────────────────
    isNotificationsMenuOpen: false,
    toggleNotificationsMenu() {
      this.isNotificationsMenuOpen = !this.isNotificationsMenuOpen
    },
    closeNotificationsMenu() {
      this.isNotificationsMenuOpen = false
    },

    // ─────────────────────────────────────────────────────────────────
    // Profile menu
    // ─────────────────────────────────────────────────────────────────
    isProfileMenuOpen: false,
    toggleProfileMenu() {
      this.isProfileMenuOpen = !this.isProfileMenuOpen
    },
    closeProfileMenu() {
      this.isProfileMenuOpen = false
    },

    // ─────────────────────────────────────────────────────────────────
    // Pages menu (legacy)
    // ─────────────────────────────────────────────────────────────────
    isPagesMenuOpen: false,
    togglePagesMenu() {
      this.isPagesMenuOpen = !this.isPagesMenuOpen
    },

    // ─────────────────────────────────────────────────────────────────
    // Collapsible sidebar sections
    // ─────────────────────────────────────────────────────────────────
    openSections: getSidebarSectionsFromStorage(),

    toggleSection(section) {
      this.openSections[section] = !this.openSections[section];
      saveSidebarSectionsToStorage(this.openSections);
    },

    // Auto-expand section containing current page
    expandSectionForCurrentPage() {
      const section = pageSectionMap[this.currentPage];
      if (section && !this.openSections[section]) {
        this.openSections[section] = true;
        saveSidebarSectionsToStorage(this.openSections);
      }
    },

    // ─────────────────────────────────────────────────────────────────
    // Page identifier - will be set by individual pages
    // ─────────────────────────────────────────────────────────────────
    currentPage: '',

    // ─────────────────────────────────────────────────────────────────
    // Admin profile and super admin flag
    // ─────────────────────────────────────────────────────────────────
    adminProfile: getAdminProfileFromStorage(),

    get isSuperAdmin() {
      return this.adminProfile?.is_super_admin === true;
    }
  }
}

/**
 * Language selector component for i18n support
 * Used by language_selector macros in templates
 *
 * @param {string} currentLang - Current language code (e.g., 'fr')
 * @param {Array} enabledLanguages - Array of enabled language codes
 * @returns {Object} Alpine.js component data
 */
function languageSelector(currentLang, enabledLanguages) {
    return {
        isLangOpen: false,
        currentLang: currentLang || 'fr',
        languages: enabledLanguages || ['fr', 'de', 'en'],
        languageNames: {
            'en': 'English',
            'fr': 'Français',
            'de': 'Deutsch',
            'lb': 'Lëtzebuergesch'
        },
        languageFlags: {
            'en': 'gb',
            'fr': 'fr',
            'de': 'de',
            'lb': 'lu'
        },
        async setLanguage(lang) {
            if (lang === this.currentLang) {
                this.isLangOpen = false;
                return;
            }
            try {
                const response = await fetch('/api/v1/language/set', {
                    method: 'POST',
                    headers: {
                        'Content-Type': 'application/json',
                    },
                    body: JSON.stringify({ language: lang })
                });
                if (response.ok) {
                    this.currentLang = lang;
                    window.location.reload();
                }
            } catch (error) {
                console.error('Failed to set language:', error);
            }
            this.isLangOpen = false;
        }
    };
}

// Export to window for use in templates
window.languageSelector = languageSelector;

/**
 * Header messages badge component
 * Shows unread message count in header
 */
function headerMessages() {
    return {
        unreadCount: 0,
        pollInterval: null,

        async init() {
            await this.fetchUnreadCount();
            // Poll every 30 seconds
            this.pollInterval = setInterval(() => this.fetchUnreadCount(), 30000);
        },

        destroy() {
            if (this.pollInterval) {
                clearInterval(this.pollInterval);
            }
        },

        async fetchUnreadCount() {
            try {
                const response = await apiClient.get('/admin/messages/unread-count');
                this.unreadCount = response.total_unread || 0;
            } catch (error) {
                // Silently fail - don't spam console for auth issues on login page
            }
        }
    };
}

// Export to window
window.headerMessages = headerMessages;

/**
 * Platform Settings Utility
 * Provides cached access to platform-wide settings
 */
const PlatformSettings = {
    // Cache key and TTL
    CACHE_KEY: 'platform_settings_cache',
    CACHE_TTL: 5 * 60 * 1000, // 5 minutes

    /**
     * Get cached settings or fetch from API
     */
    async get() {
        try {
            const cached = localStorage.getItem(this.CACHE_KEY);
            if (cached) {
                const { data, timestamp } = JSON.parse(cached);
                if (Date.now() - timestamp < this.CACHE_TTL) {
                    return data;
                }
            }

            // Fetch from API
            const response = await apiClient.get('/admin/settings/display/public');
            const settings = {
                rows_per_page: response.rows_per_page || 20
            };

            // Cache the result
            localStorage.setItem(this.CACHE_KEY, JSON.stringify({
                data: settings,
                timestamp: Date.now()
            }));

            return settings;
        } catch (error) {
            console.warn('Failed to load platform settings, using defaults:', error);
            return { rows_per_page: 20 };
        }
    },

    /**
     * Get rows per page setting
     */
    async getRowsPerPage() {
        const settings = await this.get();
        return settings.rows_per_page;
    },

    /**
     * Clear the cache (call after saving settings)
     */
    clearCache() {
        localStorage.removeItem(this.CACHE_KEY);
    }
};

// Export to window
window.PlatformSettings = PlatformSettings;