// static/vendor/js/order-detail.js
/**
 * Vendor order detail page logic
 * View order details, manage status, handle shipments, and invoice integration
 */

const orderDetailLog = window.LogConfig.loggers.orderDetail ||
    window.LogConfig.createLogger('orderDetail', false);

orderDetailLog.info('Loading...');

function vendorOrderDetail() {
    orderDetailLog.info('vendorOrderDetail() called');

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

        // Set page identifier
        currentPage: 'orders',

        // Order ID from URL
        orderId: window.orderDetailData?.orderId || null,

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

        // Order data
        order: null,
        shipmentStatus: null,
        invoice: null,

        // Modal states
        showStatusModal: false,
        showShipAllModal: false,
        newStatus: '',
        trackingNumber: '',
        trackingProvider: '',

        // Order statuses
        statuses: [
            { value: 'pending', label: 'Pending', color: 'yellow' },
            { value: 'processing', label: 'Processing', color: 'blue' },
            { value: 'partially_shipped', label: 'Partially Shipped', color: 'orange' },
            { value: 'shipped', label: 'Shipped', color: 'indigo' },
            { value: 'delivered', label: 'Delivered', color: 'green' },
            { value: 'cancelled', label: 'Cancelled', color: 'red' },
            { value: 'refunded', label: 'Refunded', color: 'gray' }
        ],

        async init() {
            orderDetailLog.info('Order detail init() called, orderId:', this.orderId);

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

            // IMPORTANT: Call parent init first to set vendorCode from URL
            const parentInit = data().init;
            if (parentInit) {
                await parentInit.call(this);
            }

            if (!this.orderId) {
                this.error = 'Order ID not provided';
                this.loading = false;
                return;
            }

            try {
                await this.loadOrderDetails();
            } catch (error) {
                orderDetailLog.error('Init failed:', error);
                this.error = 'Failed to load order details';
            }

            orderDetailLog.info('Order detail initialization complete');
        },

        /**
         * Load order details from API
         */
        async loadOrderDetails() {
            this.loading = true;
            this.error = '';

            try {
                // Load order details
                const orderResponse = await apiClient.get(
                    `/vendor/orders/${this.orderId}`
                );
                this.order = orderResponse;
                this.newStatus = this.order.status;

                orderDetailLog.info('Loaded order:', this.order.order_number);

                // Load shipment status
                await this.loadShipmentStatus();

                // Load invoice if exists
                await this.loadInvoice();

            } catch (error) {
                orderDetailLog.error('Failed to load order details:', error);
                this.error = error.message || 'Failed to load order details';
            } finally {
                this.loading = false;
            }
        },

        /**
         * Load shipment status for partial shipment tracking
         */
        async loadShipmentStatus() {
            try {
                const response = await apiClient.get(
                    `/vendor/orders/${this.orderId}/shipment-status`
                );
                this.shipmentStatus = response;
                orderDetailLog.info('Loaded shipment status:', response);
            } catch (error) {
                orderDetailLog.warn('Failed to load shipment status:', error);
                // Not critical - continue without shipment status
            }
        },

        /**
         * Load invoice for this order
         */
        async loadInvoice() {
            try {
                // Search for invoices linked to this order
                const response = await apiClient.get(
                    `/vendor/invoices?order_id=${this.orderId}&limit=1`
                );
                if (response.invoices && response.invoices.length > 0) {
                    this.invoice = response.invoices[0];
                    orderDetailLog.info('Loaded invoice:', this.invoice.invoice_number);
                }
            } catch (error) {
                orderDetailLog.warn('Failed to load invoice:', error);
                // Not critical - continue without invoice
            }
        },

        /**
         * Get status color class
         */
        getStatusColor(status) {
            const statusObj = this.statuses.find(s => s.value === status);
            return statusObj ? statusObj.color : 'gray';
        },

        /**
         * Get status label
         */
        getStatusLabel(status) {
            const statusObj = this.statuses.find(s => s.value === status);
            return statusObj ? statusObj.label : status;
        },

        /**
         * Get item shipment status
         */
        getItemShipmentStatus(itemId) {
            if (!this.shipmentStatus?.items) return null;
            return this.shipmentStatus.items.find(i => i.item_id === itemId);
        },

        /**
         * Check if item can be shipped
         */
        canShipItem(itemId) {
            const status = this.getItemShipmentStatus(itemId);
            if (!status) return true; // Assume can ship if no status
            return !status.is_fully_shipped;
        },

        /**
         * Format price for display
         */
        formatPrice(cents) {
            if (cents === null || cents === undefined) return '-';
            return new Intl.NumberFormat('de-DE', {
                style: 'currency',
                currency: 'EUR'
            }).format(cents / 100);
        },

        /**
         * Format date/time for display
         */
        formatDateTime(dateStr) {
            if (!dateStr) return '-';
            return new Date(dateStr).toLocaleDateString('de-DE', {
                year: 'numeric',
                month: 'short',
                day: 'numeric',
                hour: '2-digit',
                minute: '2-digit'
            });
        },

        /**
         * Update order status
         */
        async updateOrderStatus(status) {
            this.saving = true;
            try {
                const payload = { status };

                // Add tracking info if shipping
                if (status === 'shipped' && this.trackingNumber) {
                    payload.tracking_number = this.trackingNumber;
                    payload.tracking_provider = this.trackingProvider;
                }

                await apiClient.put(
                    `/vendor/orders/${this.orderId}/status`,
                    payload
                );

                Utils.showToast(`Order status updated to ${this.getStatusLabel(status)}`, 'success');
                await this.loadOrderDetails();

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

        /**
         * Confirm status update from modal
         */
        async confirmStatusUpdate() {
            await this.updateOrderStatus(this.newStatus);
            this.showStatusModal = false;
            this.trackingNumber = '';
            this.trackingProvider = '';
        },

        /**
         * Ship a single item
         */
        async shipItem(itemId) {
            this.saving = true;
            try {
                await apiClient.post(
                    `/vendor/orders/${this.orderId}/items/${itemId}/ship`,
                    {}
                );

                Utils.showToast('Item shipped successfully', 'success');
                await this.loadOrderDetails();

            } catch (error) {
                orderDetailLog.error('Failed to ship item:', error);
                Utils.showToast(error.message || 'Failed to ship item', 'error');
            } finally {
                this.saving = false;
            }
        },

        /**
         * Ship all remaining items
         */
        async shipAllItems() {
            this.saving = true;
            try {
                // Ship each unshipped item
                const unshippedItems = this.shipmentStatus?.items?.filter(i => !i.is_fully_shipped) || [];

                for (const item of unshippedItems) {
                    await apiClient.post(
                        `/vendor/orders/${this.orderId}/items/${item.item_id}/ship`,
                        {}
                    );
                }

                // Update order status to shipped with tracking
                const payload = { status: 'shipped' };
                if (this.trackingNumber) {
                    payload.tracking_number = this.trackingNumber;
                    payload.tracking_provider = this.trackingProvider;
                }

                await apiClient.put(
                    `/vendor/orders/${this.orderId}/status`,
                    payload
                );

                Utils.showToast('All items shipped', 'success');
                this.showShipAllModal = false;
                this.trackingNumber = '';
                this.trackingProvider = '';
                await this.loadOrderDetails();

            } catch (error) {
                orderDetailLog.error('Failed to ship all items:', error);
                Utils.showToast(error.message || 'Failed to ship items', 'error');
            } finally {
                this.saving = false;
            }
        },

        /**
         * Create invoice for this order
         */
        async createInvoice() {
            this.creatingInvoice = true;
            try {
                const response = await apiClient.post(
                    `/vendor/invoices`,
                    { order_id: this.orderId }
                );

                this.invoice = response;
                Utils.showToast(`Invoice ${response.invoice_number} created`, 'success');

            } catch (error) {
                orderDetailLog.error('Failed to create invoice:', error);
                Utils.showToast(error.message || 'Failed to create invoice', 'error');
            } finally {
                this.creatingInvoice = false;
            }
        },

        /**
         * Download invoice PDF
         */
        async downloadInvoicePdf() {
            if (!this.invoice) return;

            this.downloadingPdf = true;
            try {
                const response = await fetch(
                    `/api/v1/vendor/${this.vendorCode}/invoices/${this.invoice.id}/pdf`,
                    {
                        headers: {
                            'Authorization': `Bearer ${window.Auth?.getToken()}`
                        }
                    }
                );

                if (!response.ok) {
                    throw new Error('Failed to download PDF');
                }

                const blob = await response.blob();
                const url = window.URL.createObjectURL(blob);
                const a = document.createElement('a');
                a.href = url;
                a.download = `${this.invoice.invoice_number}.pdf`;
                document.body.appendChild(a);
                a.click();
                window.URL.revokeObjectURL(url);
                a.remove();

                Utils.showToast('Invoice downloaded', 'success');

            } catch (error) {
                orderDetailLog.error('Failed to download invoice PDF:', error);
                Utils.showToast(error.message || 'Failed to download PDF', 'error');
            } finally {
                this.downloadingPdf = false;
            }
        }
    };
}