// static/admin/js/marketplace-letzshop.js
/**
 * Admin marketplace Letzshop management page logic
 * Unified page for Products (Import/Export), Orders, and Settings
 */

// Use centralized logger
const marketplaceLetzshopLog = window.LogConfig.createLogger('MARKETPLACE-LETZSHOP');

marketplaceLetzshopLog.info('Loading...');

function adminMarketplaceLetzshop() {
    marketplaceLetzshopLog.info('adminMarketplaceLetzshop() called');

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

        // Set page identifier
        currentPage: 'marketplace-letzshop',

        // Tab state
        activeTab: 'products',

        // Loading states
        loading: false,
        importing: false,
        exporting: false,
        importingOrders: false,
        loadingOrders: false,
        loadingJobs: false,
        savingCredentials: false,
        savingCsvUrls: false,
        testingConnection: false,
        submittingTracking: false,

        // Messages
        error: '',
        successMessage: '',

        // Tom Select instance
        tomSelectInstance: null,

        // Selected vendor
        selectedVendor: null,

        // Letzshop status for selected vendor
        letzshopStatus: {
            is_configured: false,
            auto_sync_enabled: false,
            last_sync_at: null,
            last_sync_status: null
        },

        // Credentials
        credentials: null,
        showApiKey: false,

        // Import form
        importForm: {
            csv_url: '',
            language: 'fr',
            batch_size: 1000
        },

        // Export settings
        exportLanguage: 'fr',
        exportIncludeInactive: false,

        // Settings form
        settingsForm: {
            api_key: '',
            auto_sync_enabled: false,
            sync_interval_minutes: 15,
            letzshop_csv_url_fr: '',
            letzshop_csv_url_en: '',
            letzshop_csv_url_de: ''
        },

        // Orders
        orders: [],
        totalOrders: 0,
        ordersPage: 1,
        ordersLimit: 20,
        ordersFilter: '',
        orderStats: { pending: 0, confirmed: 0, rejected: 0, shipped: 0 },

        // Jobs
        jobs: [],
        jobsFilter: { type: '', status: '' },
        jobsPagination: { page: 1, per_page: 10, total: 0 },

        // Modals
        showTrackingModal: false,
        showOrderModal: false,
        selectedOrder: null,
        trackingForm: { tracking_number: '', tracking_carrier: '' },

        async init() {
            marketplaceLetzshopLog.info('init() called');

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

            // Initialize Tom Select after a short delay to ensure DOM is ready
            this.$nextTick(() => {
                this.initTomSelect();
            });

            marketplaceLetzshopLog.info('Initialization complete');
        },

        /**
         * Initialize Tom Select for vendor autocomplete
         */
        initTomSelect() {
            const selectEl = this.$refs.vendorSelect;
            if (!selectEl) {
                marketplaceLetzshopLog.error('Vendor select element not found');
                return;
            }

            // Wait for TomSelect to be available
            if (typeof TomSelect === 'undefined') {
                marketplaceLetzshopLog.warn('TomSelect not loaded yet, retrying...');
                setTimeout(() => this.initTomSelect(), 100);
                return;
            }

            marketplaceLetzshopLog.info('Initializing Tom Select');

            this.tomSelectInstance = new TomSelect(selectEl, {
                valueField: 'id',
                labelField: 'name',
                searchField: ['name', 'vendor_code'],
                maxOptions: 50,
                placeholder: 'Search vendor by name or code...',
                load: async (query, callback) => {
                    if (query.length < 2) {
                        callback([]);
                        return;
                    }
                    try {
                        const response = await apiClient.get(`/admin/vendors?search=${encodeURIComponent(query)}&limit=50`);
                        const vendors = response.vendors.map(v => ({
                            id: v.id,
                            name: v.name,
                            vendor_code: v.vendor_code
                        }));
                        callback(vendors);
                    } catch (error) {
                        marketplaceLetzshopLog.error('Failed to search vendors:', error);
                        callback([]);
                    }
                },
                render: {
                    option: (data, escape) => {
                        return `<div class="flex justify-between items-center">
                            <span>${escape(data.name)}</span>
                            <span class="text-xs text-gray-400 ml-2">${escape(data.vendor_code)}</span>
                        </div>`;
                    },
                    item: (data, escape) => {
                        return `<div>${escape(data.name)} <span class="text-gray-400">(${escape(data.vendor_code)})</span></div>`;
                    }
                },
                onChange: async (value) => {
                    if (value) {
                        await this.selectVendor(parseInt(value));
                    } else {
                        this.clearVendorSelection();
                    }
                }
            });
        },

        /**
         * Handle vendor selection
         */
        async selectVendor(vendorId) {
            marketplaceLetzshopLog.info('Selecting vendor:', vendorId);
            this.loading = true;
            this.error = '';

            try {
                // Load vendor details
                const vendor = await apiClient.get(`/admin/vendors/${vendorId}`);
                this.selectedVendor = vendor;

                // Pre-fill settings form with CSV URLs
                this.settingsForm.letzshop_csv_url_fr = vendor.letzshop_csv_url_fr || '';
                this.settingsForm.letzshop_csv_url_en = vendor.letzshop_csv_url_en || '';
                this.settingsForm.letzshop_csv_url_de = vendor.letzshop_csv_url_de || '';

                // Load Letzshop status and credentials
                await this.loadLetzshopStatus();

                // Load orders and jobs
                await Promise.all([
                    this.loadOrders(),
                    this.loadJobs()
                ]);

                marketplaceLetzshopLog.info('Vendor loaded:', vendor.name);
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to load vendor:', error);
                this.error = error.message || 'Failed to load vendor';
            } finally {
                this.loading = false;
            }
        },

        /**
         * Clear vendor selection
         */
        clearVendorSelection() {
            this.selectedVendor = null;
            this.letzshopStatus = { is_configured: false };
            this.credentials = null;
            this.orders = [];
            this.jobs = [];
            this.settingsForm = {
                api_key: '',
                auto_sync_enabled: false,
                sync_interval_minutes: 15,
                letzshop_csv_url_fr: '',
                letzshop_csv_url_en: '',
                letzshop_csv_url_de: ''
            };
        },

        /**
         * Load Letzshop status and credentials for selected vendor
         */
        async loadLetzshopStatus() {
            if (!this.selectedVendor) return;

            try {
                const response = await apiClient.get(`/admin/letzshop/vendors/${this.selectedVendor.id}/credentials`);
                this.credentials = response;
                this.letzshopStatus = {
                    is_configured: true,
                    auto_sync_enabled: response.auto_sync_enabled,
                    last_sync_at: response.last_sync_at,
                    last_sync_status: response.last_sync_status
                };
                this.settingsForm.auto_sync_enabled = response.auto_sync_enabled;
                this.settingsForm.sync_interval_minutes = response.sync_interval_minutes || 15;
            } catch (error) {
                if (error.status === 404) {
                    // Not configured
                    this.letzshopStatus = { is_configured: false };
                    this.credentials = null;
                } else {
                    marketplaceLetzshopLog.error('Failed to load Letzshop status:', error);
                }
            }
        },

        /**
         * Refresh all data for selected vendor
         */
        async refreshData() {
            if (!this.selectedVendor) return;
            await this.selectVendor(this.selectedVendor.id);
        },

        // ═══════════════════════════════════════════════════════════════
        // PRODUCTS TAB - IMPORT
        // ═══════════════════════════════════════════════════════════════

        /**
         * Quick fill import form from vendor CSV URLs
         */
        quickFillImport(language) {
            if (!this.selectedVendor) return;

            const urlMap = {
                'fr': this.selectedVendor.letzshop_csv_url_fr,
                'en': this.selectedVendor.letzshop_csv_url_en,
                'de': this.selectedVendor.letzshop_csv_url_de
            };

            const url = urlMap[language];
            if (url) {
                this.importForm.csv_url = url;
                this.importForm.language = language;
                marketplaceLetzshopLog.info('Quick filled import form:', language, url);
            }
        },

        /**
         * Start product import
         */
        async startImport() {
            if (!this.selectedVendor || !this.importForm.csv_url) return;

            this.importing = true;
            this.error = '';
            this.successMessage = '';

            try {
                const payload = {
                    vendor_id: this.selectedVendor.id,
                    source_url: this.importForm.csv_url,
                    marketplace: 'Letzshop',
                    language: this.importForm.language,
                    batch_size: this.importForm.batch_size
                };

                await apiClient.post('/admin/marketplace-import-jobs', payload);

                this.successMessage = 'Import job started successfully';
                this.importForm.csv_url = '';
                await this.loadJobs();
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to start import:', error);
                this.error = error.message || 'Failed to start import';
            } finally {
                this.importing = false;
            }
        },

        // ═══════════════════════════════════════════════════════════════
        // PRODUCTS TAB - EXPORT
        // ═══════════════════════════════════════════════════════════════

        /**
         * Download product export CSV
         */
        async downloadExport() {
            if (!this.selectedVendor) return;

            this.exporting = true;
            this.error = '';

            try {
                const params = new URLSearchParams({
                    language: this.exportLanguage,
                    include_inactive: this.exportIncludeInactive.toString()
                });

                const url = `/api/v1/admin/vendors/${this.selectedVendor.id}/export/letzshop?${params}`;

                // Create a link and trigger download
                const link = document.createElement('a');
                link.href = url;
                link.download = `${this.selectedVendor.vendor_code}_letzshop_export.csv`;
                document.body.appendChild(link);
                link.click();
                document.body.removeChild(link);

                this.successMessage = 'Export started';
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to export:', error);
                this.error = error.message || 'Failed to export products';
            } finally {
                this.exporting = false;
            }
        },

        // ═══════════════════════════════════════════════════════════════
        // ORDERS TAB
        // ═══════════════════════════════════════════════════════════════

        /**
         * Load orders for selected vendor
         */
        async loadOrders() {
            if (!this.selectedVendor || !this.letzshopStatus.is_configured) {
                this.orders = [];
                this.totalOrders = 0;
                return;
            }

            this.loadingOrders = true;
            this.error = '';

            try {
                const params = new URLSearchParams({
                    skip: ((this.ordersPage - 1) * this.ordersLimit).toString(),
                    limit: this.ordersLimit.toString()
                });

                if (this.ordersFilter) {
                    params.append('sync_status', this.ordersFilter);
                }

                const response = await apiClient.get(`/admin/letzshop/vendors/${this.selectedVendor.id}/orders?${params}`);
                this.orders = response.orders || [];
                this.totalOrders = response.total || 0;

                // Update order stats
                this.updateOrderStats();
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to load orders:', error);
                this.error = error.message || 'Failed to load orders';
            } finally {
                this.loadingOrders = false;
            }
        },

        /**
         * Update order stats based on current orders
         */
        updateOrderStats() {
            // Reset stats
            this.orderStats = { pending: 0, confirmed: 0, rejected: 0, shipped: 0 };

            // Count from orders list
            for (const order of this.orders) {
                if (this.orderStats.hasOwnProperty(order.sync_status)) {
                    this.orderStats[order.sync_status]++;
                }
            }
        },

        /**
         * Import orders from Letzshop
         */
        async importOrders() {
            if (!this.selectedVendor || !this.letzshopStatus.is_configured) return;

            this.importingOrders = true;
            this.error = '';
            this.successMessage = '';

            try {
                await apiClient.post(`/admin/letzshop/vendors/${this.selectedVendor.id}/sync`);
                this.successMessage = 'Orders imported successfully';
                await this.loadOrders();
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to import orders:', error);
                this.error = error.message || 'Failed to import orders';
            } finally {
                this.importingOrders = false;
            }
        },

        /**
         * Confirm an order
         */
        async confirmOrder(order) {
            if (!this.selectedVendor) return;

            try {
                await apiClient.post(`/admin/letzshop/vendors/${this.selectedVendor.id}/orders/${order.id}/confirm`);
                this.successMessage = 'Order confirmed';
                await this.loadOrders();
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to confirm order:', error);
                this.error = error.message || 'Failed to confirm order';
            }
        },

        /**
         * Reject an order
         */
        async rejectOrder(order) {
            if (!this.selectedVendor) return;

            if (!confirm('Are you sure you want to reject this order?')) return;

            try {
                await apiClient.post(`/admin/letzshop/vendors/${this.selectedVendor.id}/orders/${order.id}/reject`);
                this.successMessage = 'Order rejected';
                await this.loadOrders();
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to reject order:', error);
                this.error = error.message || 'Failed to reject order';
            }
        },

        /**
         * Open tracking modal
         */
        openTrackingModal(order) {
            this.selectedOrder = order;
            this.trackingForm = {
                tracking_number: order.tracking_number || '',
                tracking_carrier: order.tracking_carrier || ''
            };
            this.showTrackingModal = true;
        },

        /**
         * Submit tracking information
         */
        async submitTracking() {
            if (!this.selectedVendor || !this.selectedOrder) return;

            this.submittingTracking = true;

            try {
                await apiClient.post(
                    `/admin/letzshop/vendors/${this.selectedVendor.id}/orders/${this.selectedOrder.id}/tracking`,
                    this.trackingForm
                );
                this.successMessage = 'Tracking information saved';
                this.showTrackingModal = false;
                await this.loadOrders();
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to save tracking:', error);
                this.error = error.message || 'Failed to save tracking';
            } finally {
                this.submittingTracking = false;
            }
        },

        /**
         * View order details
         */
        viewOrderDetails(order) {
            this.selectedOrder = order;
            this.showOrderModal = true;
        },

        // ═══════════════════════════════════════════════════════════════
        // SETTINGS TAB
        // ═══════════════════════════════════════════════════════════════

        /**
         * Save Letzshop credentials
         */
        async saveCredentials() {
            if (!this.selectedVendor) return;

            this.savingCredentials = true;
            this.error = '';
            this.successMessage = '';

            try {
                const payload = {
                    auto_sync_enabled: this.settingsForm.auto_sync_enabled,
                    sync_interval_minutes: parseInt(this.settingsForm.sync_interval_minutes)
                };

                // Only include API key if it was provided (not just placeholder)
                if (this.settingsForm.api_key && this.settingsForm.api_key.length > 0) {
                    payload.api_key = this.settingsForm.api_key;
                }

                if (this.credentials) {
                    // Update existing
                    await apiClient.patch(`/admin/letzshop/vendors/${this.selectedVendor.id}/credentials`, payload);
                } else {
                    // Create new (API key required)
                    if (!payload.api_key) {
                        this.error = 'API key is required for initial setup';
                        this.savingCredentials = false;
                        return;
                    }
                    await apiClient.post(`/admin/letzshop/vendors/${this.selectedVendor.id}/credentials`, payload);
                }

                this.successMessage = 'Credentials saved successfully';
                this.settingsForm.api_key = ''; // Clear the input
                await this.loadLetzshopStatus();
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to save credentials:', error);
                this.error = error.message || 'Failed to save credentials';
            } finally {
                this.savingCredentials = false;
            }
        },

        /**
         * Test Letzshop connection
         */
        async testConnection() {
            if (!this.selectedVendor || !this.letzshopStatus.is_configured) return;

            this.testingConnection = true;
            this.error = '';
            this.successMessage = '';

            try {
                await apiClient.post(`/admin/letzshop/vendors/${this.selectedVendor.id}/test`);
                this.successMessage = 'Connection test successful!';
            } catch (error) {
                marketplaceLetzshopLog.error('Connection test failed:', error);
                this.error = error.message || 'Connection test failed';
            } finally {
                this.testingConnection = false;
            }
        },

        /**
         * Delete Letzshop credentials
         */
        async deleteCredentials() {
            if (!this.selectedVendor) return;

            if (!confirm('Are you sure you want to remove the Letzshop configuration? This will disable all Letzshop features for this vendor.')) {
                return;
            }

            try {
                await apiClient.delete(`/admin/letzshop/vendors/${this.selectedVendor.id}/credentials`);
                this.successMessage = 'Credentials removed';
                this.credentials = null;
                this.letzshopStatus = { is_configured: false };
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to delete credentials:', error);
                this.error = error.message || 'Failed to remove credentials';
            }
        },

        /**
         * Save CSV URLs to vendor
         */
        async saveCsvUrls() {
            if (!this.selectedVendor) return;

            this.savingCsvUrls = true;
            this.error = '';
            this.successMessage = '';

            try {
                await apiClient.patch(`/admin/vendors/${this.selectedVendor.id}`, {
                    letzshop_csv_url_fr: this.settingsForm.letzshop_csv_url_fr || null,
                    letzshop_csv_url_en: this.settingsForm.letzshop_csv_url_en || null,
                    letzshop_csv_url_de: this.settingsForm.letzshop_csv_url_de || null
                });

                // Update local vendor object
                this.selectedVendor.letzshop_csv_url_fr = this.settingsForm.letzshop_csv_url_fr;
                this.selectedVendor.letzshop_csv_url_en = this.settingsForm.letzshop_csv_url_en;
                this.selectedVendor.letzshop_csv_url_de = this.settingsForm.letzshop_csv_url_de;

                this.successMessage = 'CSV URLs saved successfully';
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to save CSV URLs:', error);
                this.error = error.message || 'Failed to save CSV URLs';
            } finally {
                this.savingCsvUrls = false;
            }
        },

        // ═══════════════════════════════════════════════════════════════
        // JOBS TABLE
        // ═══════════════════════════════════════════════════════════════

        /**
         * Load jobs for selected vendor
         */
        async loadJobs() {
            if (!this.selectedVendor) {
                this.jobs = [];
                return;
            }

            this.loadingJobs = true;

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

                if (this.jobsFilter.type) {
                    params.append('job_type', this.jobsFilter.type);
                }
                if (this.jobsFilter.status) {
                    params.append('status', this.jobsFilter.status);
                }

                const response = await apiClient.get(`/admin/letzshop/vendors/${this.selectedVendor.id}/jobs?${params}`);
                this.jobs = response.jobs || [];
                this.jobsPagination.total = response.total || 0;
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to load jobs:', error);
                // Don't show error for jobs - not critical
            } finally {
                this.loadingJobs = false;
            }
        },

        /**
         * View job details
         */
        viewJobDetails(job) {
            // For now, just log - could open a modal
            marketplaceLetzshopLog.info('View job details:', job);
            alert(`Job #${job.id}\nType: ${job.type}\nStatus: ${job.status}\nRecords: ${job.records_succeeded}/${job.records_processed}`);
        },

        /**
         * View job errors
         */
        async viewJobErrors(job) {
            if (job.type !== 'import') return;

            try {
                const response = await apiClient.get(`/admin/marketplace-import-jobs/${job.id}/errors`);
                const errors = response.errors || [];

                if (errors.length === 0) {
                    alert('No error details available');
                    return;
                }

                // Show errors in alert for now
                const errorText = errors.slice(0, 10).map(e =>
                    `Row ${e.row_number}: ${e.error_message}`
                ).join('\n');

                alert(`Import Errors (showing first 10):\n\n${errorText}`);
            } catch (error) {
                marketplaceLetzshopLog.error('Failed to load job errors:', error);
                this.error = 'Failed to load error details';
            }
        },

        // ═══════════════════════════════════════════════════════════════
        // UTILITIES
        // ═══════════════════════════════════════════════════════════════

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

        /**
         * Format duration between two dates
         */
        formatDuration(startDate, endDate) {
            if (!startDate) return '-';
            if (!endDate) return 'In progress...';

            try {
                const start = new Date(startDate);
                const end = new Date(endDate);
                const diffMs = end - start;

                if (diffMs < 1000) return '<1s';
                if (diffMs < 60000) return `${Math.round(diffMs / 1000)}s`;
                if (diffMs < 3600000) return `${Math.round(diffMs / 60000)}m`;
                return `${Math.round(diffMs / 3600000)}h`;
            } catch {
                return '-';
            }
        }
    };
}