// static/admin/js/orders.js
/**
 * Admin orders management page logic
 * View and manage orders across all vendors
 */

const adminOrdersLog = window.LogConfig.loggers.adminOrders ||
    window.LogConfig.createLogger('adminOrders', false);

adminOrdersLog.info('Loading...');

function adminOrders() {
    adminOrdersLog.info('adminOrders() called');

    return {
        // Inherit base layout state
        ...data(),

        // Set page identifier
        currentPage: 'orders',

        // Loading states
        loading: true,
        error: '',
        saving: false,

        // Orders data
        orders: [],
        stats: {
            total_orders: 0,
            pending_orders: 0,
            processing_orders: 0,
            shipped_orders: 0,
            delivered_orders: 0,
            cancelled_orders: 0,
            refunded_orders: 0,
            total_revenue: 0,
            vendors_with_orders: 0
        },

        // Filters
        filters: {
            search: '',
            vendor_id: '',
            status: '',
            channel: ''
        },

        // Available vendors for filter dropdown
        vendors: [],

        // Pagination
        pagination: {
            page: 1,
            per_page: 50,
            total: 0,
            pages: 0
        },

        // Modal states
        showStatusModal: false,
        showDetailModal: false,
        selectedOrder: null,
        selectedOrderDetail: null,

        // Status update form
        statusForm: {
            status: '',
            tracking_number: '',
            reason: ''
        },

        // Debounce timer
        searchTimeout: null,

        // Computed: Total 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: Page numbers for pagination
        get pageNumbers() {
            const pages = [];
            const totalPages = this.totalPages;
            const current = this.pagination.page;

            if (totalPages <= 7) {
                for (let i = 1; i <= totalPages; i++) {
                    pages.push(i);
                }
            } else {
                pages.push(1);
                if (current > 3) {
                    pages.push('...');
                }
                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('...');
                }
                pages.push(totalPages);
            }
            return pages;
        },

        async init() {
            adminOrdersLog.info('Orders init() called');

            // Guard against multiple initialization
            if (window._adminOrdersInitialized) {
                adminOrdersLog.warn('Already initialized, skipping');
                return;
            }
            window._adminOrdersInitialized = true;

            // Load data in parallel
            await Promise.all([
                this.loadStats(),
                this.loadVendors(),
                this.loadOrders()
            ]);

            adminOrdersLog.info('Orders initialization complete');
        },

        /**
         * Load order statistics
         */
        async loadStats() {
            try {
                const response = await apiClient.get('/admin/orders/stats');
                this.stats = response;
                adminOrdersLog.info('Loaded stats:', this.stats);
            } catch (error) {
                adminOrdersLog.error('Failed to load stats:', error);
            }
        },

        /**
         * Load available vendors for filter
         */
        async loadVendors() {
            try {
                const response = await apiClient.get('/admin/orders/vendors');
                this.vendors = response.vendors || [];
                adminOrdersLog.info('Loaded vendors:', this.vendors.length);
            } catch (error) {
                adminOrdersLog.error('Failed to load vendors:', error);
            }
        },

        /**
         * Load orders with filtering and pagination
         */
        async loadOrders() {
            this.loading = true;
            this.error = '';

            try {
                const params = new URLSearchParams({
                    skip: (this.pagination.page - 1) * this.pagination.per_page,
                    limit: this.pagination.per_page
                });

                // Add filters
                if (this.filters.search) {
                    params.append('search', this.filters.search);
                }
                if (this.filters.vendor_id) {
                    params.append('vendor_id', this.filters.vendor_id);
                }
                if (this.filters.status) {
                    params.append('status', this.filters.status);
                }
                if (this.filters.channel) {
                    params.append('channel', this.filters.channel);
                }

                const response = await apiClient.get(`/admin/orders?${params.toString()}`);

                this.orders = response.orders || [];
                this.pagination.total = response.total || 0;
                this.pagination.pages = Math.ceil(this.pagination.total / this.pagination.per_page);

                adminOrdersLog.info('Loaded orders:', this.orders.length, 'of', this.pagination.total);
            } catch (error) {
                adminOrdersLog.error('Failed to load orders:', error);
                this.error = error.message || 'Failed to load orders';
            } finally {
                this.loading = false;
            }
        },

        /**
         * Debounced search handler
         */
        debouncedSearch() {
            clearTimeout(this.searchTimeout);
            this.searchTimeout = setTimeout(() => {
                this.pagination.page = 1;
                this.loadOrders();
            }, 300);
        },

        /**
         * Refresh orders list
         */
        async refresh() {
            await Promise.all([
                this.loadStats(),
                this.loadVendors(),
                this.loadOrders()
            ]);
        },

        /**
         * View order details
         */
        async viewOrder(order) {
            try {
                const response = await apiClient.get(`/admin/orders/${order.id}`);
                this.selectedOrderDetail = response;
                this.showDetailModal = true;
            } catch (error) {
                adminOrdersLog.error('Failed to load order details:', error);
                Utils.showToast('Failed to load order details.', 'error');
            }
        },

        /**
         * Open status update modal
         */
        openStatusModal(order) {
            this.selectedOrder = order;
            this.statusForm = {
                status: order.status,
                tracking_number: order.tracking_number || '',
                reason: ''
            };
            this.showStatusModal = true;
        },

        /**
         * Update order status
         */
        async updateStatus() {
            if (!this.selectedOrder || this.statusForm.status === this.selectedOrder.status) return;

            this.saving = true;
            try {
                const payload = {
                    status: this.statusForm.status
                };

                if (this.statusForm.tracking_number) {
                    payload.tracking_number = this.statusForm.tracking_number;
                }

                if (this.statusForm.reason) {
                    payload.reason = this.statusForm.reason;
                }

                await apiClient.patch(`/admin/orders/${this.selectedOrder.id}/status`, payload);

                adminOrdersLog.info('Updated order status:', this.selectedOrder.id);

                this.showStatusModal = false;
                this.selectedOrder = null;

                Utils.showToast('Order status updated successfully.', 'success');

                await this.refresh();
            } catch (error) {
                adminOrdersLog.error('Failed to update order status:', error);
                Utils.showToast(error.message || 'Failed to update status.', 'error');
            } finally {
                this.saving = false;
            }
        },

        /**
         * Get CSS class for status badge
         */
        getStatusClass(status) {
            const classes = {
                pending: 'text-orange-700 bg-orange-100 dark:bg-orange-700 dark:text-orange-100',
                processing: 'text-blue-700 bg-blue-100 dark:bg-blue-700 dark:text-blue-100',
                shipped: 'text-purple-700 bg-purple-100 dark:bg-purple-700 dark:text-purple-100',
                delivered: 'text-green-700 bg-green-100 dark:bg-green-700 dark:text-green-100',
                cancelled: 'text-red-700 bg-red-100 dark:bg-red-700 dark:text-red-100',
                refunded: 'text-gray-700 bg-gray-100 dark:bg-gray-700 dark:text-gray-100'
            };
            return classes[status] || 'text-gray-700 bg-gray-100 dark:bg-gray-700 dark:text-gray-100';
        },

        /**
         * Format price for display
         */
        formatPrice(price, currency = 'EUR') {
            if (price === null || price === undefined) return '-';
            return new Intl.NumberFormat('en-US', {
                style: 'currency',
                currency: currency || 'EUR'
            }).format(price);
        },

        /**
         * Format date for display
         */
        formatDate(dateString) {
            if (!dateString) return '-';
            const date = new Date(dateString);
            return date.toLocaleDateString('en-GB', {
                day: '2-digit',
                month: 'short',
                year: 'numeric'
            });
        },

        /**
         * Format time for display
         */
        formatTime(dateString) {
            if (!dateString) return '';
            const date = new Date(dateString);
            return date.toLocaleTimeString('en-GB', {
                hour: '2-digit',
                minute: '2-digit'
            });
        },

        /**
         * Format full date and time
         */
        formatDateTime(dateString) {
            if (!dateString) return '-';
            const date = new Date(dateString);
            return date.toLocaleString('en-GB', {
                day: '2-digit',
                month: 'short',
                year: 'numeric',
                hour: '2-digit',
                minute: '2-digit'
            });
        },

        /**
         * Pagination: Previous page
         */
        previousPage() {
            if (this.pagination.page > 1) {
                this.pagination.page--;
                this.loadOrders();
            }
        },

        /**
         * Pagination: Next page
         */
        nextPage() {
            if (this.pagination.page < this.totalPages) {
                this.pagination.page++;
                this.loadOrders();
            }
        },

        /**
         * Pagination: Go to specific page
         */
        goToPage(pageNum) {
            if (pageNum !== '...' && pageNum >= 1 && pageNum <= this.totalPages) {
                this.pagination.page = pageNum;
                this.loadOrders();
            }
        }
    };
}