// static/admin/js/vendors.js

// ✅ Use centralized logger - ONE LINE!
const vendorsLog = window.LogConfig.loggers.vendors;

// ============================================
// VENDOR LIST FUNCTION
// ============================================
function adminVendors() {
    return {
        // Inherit base layout functionality from init-alpine.js
        ...data(),

        // ✅ CRITICAL: Page identifier for sidebar active state
        currentPage: 'vendors',

        // Vendors page specific state
        vendors: [],
        stats: {
            total: 0,
            verified: 0,
            pending: 0,
            inactive: 0
        },
        loading: false,
        error: null,

        // Search and filters
        filters: {
            search: '',
            is_active: '',
            is_verified: ''
        },

        // Pagination state (server-side)
        pagination: {
            page: 1,
            per_page: 10,
            total: 0,
            pages: 0
        },

        // Initialize
        async init() {
            vendorsLog.info('=== VENDORS PAGE INITIALIZING ===');

            // Prevent multiple initializations
            if (window._vendorsInitialized) {
                vendorsLog.warn('Vendors page already initialized, skipping...');
                return;
            }
            window._vendorsInitialized = true;

            vendorsLog.group('Loading vendors data');
            await this.loadVendors();
            await this.loadStats();
            vendorsLog.groupEnd();

            vendorsLog.info('=== VENDORS PAGE INITIALIZATION COMPLETE ===');
        },

        // Debounced search
        debouncedSearch() {
            if (this._searchTimeout) {
                clearTimeout(this._searchTimeout);
            }
            this._searchTimeout = setTimeout(() => {
                vendorsLog.info('Search triggered:', this.filters.search);
                this.pagination.page = 1;
                this.loadVendors();
            }, 300);
        },

        // Computed: Get vendors for current page (already paginated from server)
        get paginatedVendors() {
            return this.vendors;
        },

        // Computed: Total number of pages
        get totalPages() {
            return this.pagination.pages;
        },

        // Computed: Start index for pagination display
        get startIndex() {
            if (this.pagination.total === 0) return 0;
            return (this.pagination.page - 1) * this.pagination.per_page + 1;
        },

        // Computed: End index for pagination display
        get endIndex() {
            const end = this.pagination.page * this.pagination.per_page;
            return end > this.pagination.total ? this.pagination.total : end;
        },

        // Computed: Generate page numbers array with ellipsis
        get pageNumbers() {
            const pages = [];
            const totalPages = this.totalPages;
            const current = this.pagination.page;

            if (totalPages <= 7) {
                // Show all pages if 7 or fewer
                for (let i = 1; i <= totalPages; i++) {
                    pages.push(i);
                }
            } else {
                // Always show first page
                pages.push(1);

                if (current > 3) {
                    pages.push('...');
                }

                // Show pages around current page
                const start = Math.max(2, current - 1);
                const end = Math.min(totalPages - 1, current + 1);

                for (let i = start; i <= end; i++) {
                    pages.push(i);
                }

                if (current < totalPages - 2) {
                    pages.push('...');
                }

                // Always show last page
                pages.push(totalPages);
            }

            return pages;
        },

        // Load vendors list with search and pagination
        async loadVendors() {
            vendorsLog.info('Loading vendors list...');
            this.loading = true;
            this.error = null;

            try {
                // Build query parameters
                const params = new URLSearchParams();
                params.append('skip', (this.pagination.page - 1) * this.pagination.per_page);
                params.append('limit', this.pagination.per_page);

                if (this.filters.search) {
                    params.append('search', this.filters.search);
                }
                if (this.filters.is_active !== '') {
                    params.append('is_active', this.filters.is_active);
                }
                if (this.filters.is_verified !== '') {
                    params.append('is_verified', this.filters.is_verified);
                }

                const url = `/admin/vendors?${params}`;
                window.LogConfig.logApiCall('GET', url, null, 'request');

                const startTime = performance.now();
                const response = await apiClient.get(url);
                const duration = performance.now() - startTime;

                window.LogConfig.logApiCall('GET', url, response, 'response');
                window.LogConfig.logPerformance('Load Vendors', duration);

                // Handle response with pagination info
                if (response.vendors) {
                    this.vendors = response.vendors;
                    this.pagination.total = response.total;
                    this.pagination.pages = Math.ceil(response.total / this.pagination.per_page);

                    vendorsLog.info(`Loaded ${this.vendors.length} vendors (total: ${response.total})`);
                } else {
                    // Fallback for different response structures
                    this.vendors = response.items || response || [];
                    this.pagination.total = this.vendors.length;
                    this.pagination.pages = Math.ceil(this.vendors.length / this.pagination.per_page);

                    vendorsLog.info(`Vendors loaded in ${duration}ms`, {
                        count: this.vendors.length,
                        hasVendors: this.vendors.length > 0
                    });
                }

                if (this.vendors.length > 0) {
                    vendorsLog.debug('First vendor:', this.vendors[0]);
                }

            } catch (error) {
                window.LogConfig.logError(error, 'Load Vendors');
                this.error = error.message || 'Failed to load vendors';
                Utils.showToast('Failed to load vendors', 'error');
            } finally {
                this.loading = false;
            }
        },

        // Load statistics
        async loadStats() {
            vendorsLog.info('Loading vendor statistics...');

            try {
                const url = '/admin/vendors/stats';
                window.LogConfig.logApiCall('GET', url, null, 'request');

                const startTime = performance.now();
                const response = await apiClient.get(url);
                const duration = performance.now() - startTime;

                window.LogConfig.logApiCall('GET', url, response, 'response');
                window.LogConfig.logPerformance('Load Vendor Stats', duration);

                this.stats = response;
                vendorsLog.info(`Stats loaded in ${duration}ms`, this.stats);

            } catch (error) {
                window.LogConfig.logError(error, 'Load Vendor Stats');
                // Don't show error toast for stats, just log it
            }
        },

        // Pagination: Go to specific page
        goToPage(pageNum) {
            if (pageNum === '...' || pageNum < 1 || pageNum > this.totalPages) {
                return;
            }
            vendorsLog.info('Going to page:', pageNum);
            this.pagination.page = pageNum;
            this.loadVendors();
        },

        // Pagination: Go to next page
        nextPage() {
            if (this.pagination.page < this.totalPages) {
                vendorsLog.info('Going to next page');
                this.pagination.page++;
                this.loadVendors();
            }
        },

        // Pagination: Go to previous page
        previousPage() {
            if (this.pagination.page > 1) {
                vendorsLog.info('Going to previous page');
                this.pagination.page--;
                this.loadVendors();
            }
        },

        // Format date (matches dashboard pattern)
        formatDate(dateString) {
            if (!dateString) {
                vendorsLog.debug('formatDate called with empty dateString');
                return '-';
            }
            const formatted = Utils.formatDate(dateString);
            vendorsLog.debug(`Date formatted: ${dateString} -> ${formatted}`);
            return formatted;
        },

        // View vendor details
        viewVendor(vendorCode) {
            vendorsLog.info('Navigating to vendor details:', vendorCode);
            const url = `/admin/vendors/${vendorCode}`;
            vendorsLog.debug('Navigation URL:', url);
            window.location.href = url;
        },

        // Edit vendor
        editVendor(vendorCode) {
            vendorsLog.info('Navigating to vendor edit:', vendorCode);
            const url = `/admin/vendors/${vendorCode}/edit`;
            vendorsLog.debug('Navigation URL:', url);
            window.location.href = url;
        },

        // Delete vendor
        async deleteVendor(vendor) {
            vendorsLog.info('Delete vendor requested:', vendor.vendor_code);

            if (!confirm(`Are you sure you want to delete vendor "${vendor.name}"?\n\nThis action cannot be undone.`)) {
                vendorsLog.info('Delete cancelled by user');
                return;
            }

            try {
                const url = `/admin/vendors/${vendor.vendor_code}`;
                window.LogConfig.logApiCall('DELETE', url, null, 'request');

                vendorsLog.info('Deleting vendor:', vendor.vendor_code);
                await apiClient.delete(url);

                window.LogConfig.logApiCall('DELETE', url, null, 'response');

                Utils.showToast('Vendor deleted successfully', 'success');
                vendorsLog.info('Vendor deleted successfully');

                // Reload data
                await this.loadVendors();
                await this.loadStats();

            } catch (error) {
                window.LogConfig.logError(error, 'Delete Vendor');
                Utils.showToast(error.message || 'Failed to delete vendor', 'error');
            }
        },

        // Refresh vendors list
        async refresh() {
            vendorsLog.info('=== VENDORS REFRESH TRIGGERED ===');

            vendorsLog.group('Refreshing vendors data');
            await this.loadVendors();
            await this.loadStats();
            vendorsLog.groupEnd();

            Utils.showToast('Vendors list refreshed', 'success');
            vendorsLog.info('=== VENDORS REFRESH COMPLETE ===');
        }
    };
}

vendorsLog.info('Vendors module loaded');