// static/admin/js/dashboard.js

// Log levels: 0 = None, 1 = Error, 2 = Warning, 3 = Info, 4 = Debug
const DASHBOARD_LOG_LEVEL = 3; // Set to 3 for production, 4 for full debugging

const dashLog = {
    error: (...args) => DASHBOARD_LOG_LEVEL >= 1 && console.error('❌ [DASHBOARD ERROR]', ...args),
    warn: (...args) => DASHBOARD_LOG_LEVEL >= 2 && console.warn('⚠️ [DASHBOARD WARN]', ...args),
    info: (...args) => DASHBOARD_LOG_LEVEL >= 3 && console.info('ℹ️ [DASHBOARD INFO]', ...args),
    debug: (...args) => DASHBOARD_LOG_LEVEL >= 4 && console.log('🔍 [DASHBOARD DEBUG]', ...args)
};

function adminDashboard() {
    return {
        // Inherit base layout functionality from init-alpine.js
        ...data(),

        // Dashboard-specific state
        currentPage: 'dashboard',
        stats: {
            totalVendors: 0,
            activeUsers: 0,
            verifiedVendors: 0,
            importJobs: 0
        },
        recentVendors: [],
        loading: true,
        error: null,

        /**
         * Initialize dashboard
         */
        async init() {
            dashLog.info('=== DASHBOARD INITIALIZING ===');
            dashLog.debug('Current URL:', window.location.href);
            dashLog.debug('Current pathname:', window.location.pathname);

            const token = localStorage.getItem('admin_token');
            dashLog.debug('Has admin_token?', !!token);
            if (token) {
                dashLog.debug('Token preview:', token.substring(0, 20) + '...');
            }

            // Prevent multiple initializations
            if (window._dashboardInitialized) {
                dashLog.warn('Dashboard already initialized, skipping...');
                return;
            }
            window._dashboardInitialized = true;
            dashLog.debug('Dashboard initialization flag set');

            await this.loadDashboard();
            dashLog.info('=== DASHBOARD INITIALIZATION COMPLETE ===');
        },

        /**
         * Load all dashboard data
         */
        async loadDashboard() {
            dashLog.info('Loading dashboard data...');
            this.loading = true;
            this.error = null;
            dashLog.debug('Dashboard state: loading=true, error=null');

            try {
                dashLog.info('Starting parallel data fetch...');
                const startTime = Date.now();

                // Load stats and vendors in parallel
                await Promise.all([
                    this.loadStats(),
                    this.loadRecentVendors()
                ]);

                const duration = Date.now() - startTime;
                dashLog.info(`Dashboard data loaded successfully in ${duration}ms`);

            } catch (error) {
                dashLog.error('Dashboard load error:', error);
                dashLog.error('Error details:', {
                    message: error.message,
                    name: error.name,
                    stack: error.stack
                });

                this.error = error.message;
                Utils.showToast('Failed to load dashboard data', 'error');

            } finally {
                this.loading = false;
                dashLog.debug('Dashboard state: loading=false');
                dashLog.info('Dashboard load attempt finished');
            }
        },

        /**
         * Load platform statistics
         */
        async loadStats() {
            dashLog.info('Loading platform statistics...');
            dashLog.debug('API endpoint: /admin/dashboard/stats/platform');

            try {
                const startTime = Date.now();
                const data = await apiClient.get('/admin/dashboard/stats/platform');
                const duration = Date.now() - startTime;

                dashLog.info(`Stats loaded in ${duration}ms`);
                dashLog.debug('Raw stats data:', data);

                // Map API response to stats cards
                this.stats = {
                    totalVendors: data.vendors?.total_vendors || 0,
                    activeUsers: data.users?.active_users || 0,
                    verifiedVendors: data.vendors?.verified_vendors || 0,
                    importJobs: data.imports?.total_imports || 0
                };

                dashLog.info('Stats mapped:', this.stats);

            } catch (error) {
                dashLog.error('Failed to load stats:', error);
                throw error;
            }
        },

        /**
         * Load recent vendors
         */
        async loadRecentVendors() {
            dashLog.info('Loading recent vendors...');
            dashLog.debug('API endpoint: /admin/dashboard');

            try {
                const startTime = Date.now();
                const data = await apiClient.get('/admin/dashboard');
                const duration = Date.now() - startTime;

                dashLog.info(`Recent vendors loaded in ${duration}ms`);
                dashLog.debug('Vendors data:', {
                    count: data.recent_vendors?.length || 0,
                    hasData: !!data.recent_vendors
                });

                this.recentVendors = data.recent_vendors || [];

                if (this.recentVendors.length > 0) {
                    dashLog.info(`Loaded ${this.recentVendors.length} recent vendors`);
                    dashLog.debug('First vendor:', this.recentVendors[0]);
                } else {
                    dashLog.warn('No recent vendors found');
                }

            } catch (error) {
                dashLog.error('Failed to load recent vendors:', error);
                throw error;
            }
        },

        /**
         * Format date for display
         */
        formatDate(dateString) {
            if (!dateString) {
                dashLog.debug('formatDate called with empty dateString');
                return '-';
            }
            const formatted = Utils.formatDate(dateString);
            dashLog.debug(`Date formatted: ${dateString} -> ${formatted}`);
            return formatted;
        },

        /**
         * Navigate to vendor detail page
         */
        viewVendor(vendorCode) {
            dashLog.info('Navigating to vendor:', vendorCode);
            const url = `/admin/vendors?code=${vendorCode}`;
            dashLog.debug('Navigation URL:', url);
            window.location.href = url;
        },

        /**
         * Refresh dashboard data
         */
        async refresh() {
            dashLog.info('=== DASHBOARD REFRESH TRIGGERED ===');
            await this.loadDashboard();
            Utils.showToast('Dashboard refreshed', 'success');
            dashLog.info('=== DASHBOARD REFRESH COMPLETE ===');
        }
    };
}

dashLog.info('Dashboard module loaded');