// static/vendor/js/notifications.js
/**
 * Vendor notifications center page logic
 * View and manage notifications
 */

const vendorNotificationsLog = window.LogConfig.loggers.vendorNotifications ||
    window.LogConfig.createLogger('vendorNotifications', false);

vendorNotificationsLog.info('Loading...');

function vendorNotifications() {
    vendorNotificationsLog.info('vendorNotifications() called');

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

        // Set page identifier
        currentPage: 'notifications',

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

        // Notifications data
        notifications: [],
        stats: {
            total: 0,
            unread_count: 0
        },

        // Pagination
        page: 1,
        limit: 20,
        skip: 0,

        // Filters
        filters: {
            priority: '',
            is_read: ''
        },

        // Settings
        settings: null,
        showSettingsModal: false,
        settingsForm: {
            email_notifications: true,
            in_app_notifications: true
        },

        async init() {
            vendorNotificationsLog.info('Notifications init() called');

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

            try {
                await this.loadNotifications();
            } catch (error) {
                vendorNotificationsLog.error('Init failed:', error);
                this.error = 'Failed to initialize notifications page';
            } finally {
                this.loading = false;
            }

            vendorNotificationsLog.info('Notifications initialization complete');
        },

        /**
         * Load notifications with current filters
         */
        async loadNotifications() {
            this.loadingNotifications = true;
            this.error = '';

            try {
                this.skip = (this.page - 1) * this.limit;
                const params = new URLSearchParams();
                params.append('skip', this.skip);
                params.append('limit', this.limit);

                if (this.filters.is_read === 'false') {
                    params.append('unread_only', 'true');
                }

                const response = await apiClient.get(`/vendor/${this.vendorCode}/notifications?${params}`);

                this.notifications = response.notifications || [];
                this.stats.total = response.total || 0;
                this.stats.unread_count = response.unread_count || 0;

                vendorNotificationsLog.info(`Loaded ${this.notifications.length} notifications`);
            } catch (error) {
                vendorNotificationsLog.error('Failed to load notifications:', error);
                this.error = error.message || 'Failed to load notifications';
            } finally {
                this.loadingNotifications = false;
            }
        },

        /**
         * Mark notification as read
         */
        async markAsRead(notification) {
            try {
                await apiClient.put(`/vendor/${this.vendorCode}/notifications/${notification.id}/read`);

                // Update local state
                notification.is_read = true;
                this.stats.unread_count = Math.max(0, this.stats.unread_count - 1);

                Utils.showToast('Notification marked as read', 'success');
            } catch (error) {
                vendorNotificationsLog.error('Failed to mark as read:', error);
                Utils.showToast(error.message || 'Failed to mark notification as read', 'error');
            }
        },

        /**
         * Mark all notifications as read
         */
        async markAllAsRead() {
            try {
                await apiClient.put(`/vendor/${this.vendorCode}/notifications/mark-all-read`);

                // Update local state
                this.notifications.forEach(n => n.is_read = true);
                this.stats.unread_count = 0;

                Utils.showToast('All notifications marked as read', 'success');
            } catch (error) {
                vendorNotificationsLog.error('Failed to mark all as read:', error);
                Utils.showToast(error.message || 'Failed to mark all as read', 'error');
            }
        },

        /**
         * Delete notification
         */
        async deleteNotification(notificationId) {
            if (!confirm('Are you sure you want to delete this notification?')) {
                return;
            }

            try {
                await apiClient.delete(`/vendor/${this.vendorCode}/notifications/${notificationId}`);

                // Remove from local state
                const wasUnread = this.notifications.find(n => n.id === notificationId && !n.is_read);
                this.notifications = this.notifications.filter(n => n.id !== notificationId);
                this.stats.total = Math.max(0, this.stats.total - 1);
                if (wasUnread) {
                    this.stats.unread_count = Math.max(0, this.stats.unread_count - 1);
                }

                Utils.showToast('Notification deleted', 'success');
            } catch (error) {
                vendorNotificationsLog.error('Failed to delete notification:', error);
                Utils.showToast(error.message || 'Failed to delete notification', 'error');
            }
        },

        /**
         * Open settings modal
         */
        async openSettingsModal() {
            try {
                const response = await apiClient.get(`/vendor/${this.vendorCode}/notifications/settings`);
                this.settingsForm = {
                    email_notifications: response.email_notifications !== false,
                    in_app_notifications: response.in_app_notifications !== false
                };
                this.showSettingsModal = true;
            } catch (error) {
                vendorNotificationsLog.error('Failed to load settings:', error);
                Utils.showToast(error.message || 'Failed to load notification settings', 'error');
            }
        },

        /**
         * Save notification settings
         */
        async saveSettings() {
            try {
                await apiClient.put(`/vendor/${this.vendorCode}/notifications/settings`, this.settingsForm);
                Utils.showToast('Notification settings saved', 'success');
                this.showSettingsModal = false;
            } catch (error) {
                vendorNotificationsLog.error('Failed to save settings:', error);
                Utils.showToast(error.message || 'Failed to save settings', 'error');
            }
        },

        /**
         * Get notification icon based on type
         */
        getNotificationIcon(type) {
            const icons = {
                'order_received': 'shopping-cart',
                'order_shipped': 'truck',
                'order_delivered': 'check-circle',
                'low_stock': 'exclamation-triangle',
                'import_complete': 'cloud-download',
                'import_failed': 'x-circle',
                'team_invite': 'user-plus',
                'payment_received': 'credit-card',
                'system': 'cog'
            };
            return icons[type] || 'bell';
        },

        /**
         * Get priority color class
         */
        getPriorityClass(priority) {
            const classes = {
                'critical': 'bg-red-100 text-red-600 dark:bg-red-900 dark:text-red-300',
                'high': 'bg-orange-100 text-orange-600 dark:bg-orange-900 dark:text-orange-300',
                'normal': 'bg-blue-100 text-blue-600 dark:bg-blue-900 dark:text-blue-300',
                'low': 'bg-gray-100 text-gray-600 dark:bg-gray-700 dark:text-gray-300'
            };
            return classes[priority] || classes['normal'];
        },

        /**
         * Format date for display
         */
        formatDate(dateString) {
            if (!dateString) return '-';
            const date = new Date(dateString);
            const now = new Date();
            const diff = Math.floor((now - date) / 1000);

            // Show relative time for recent dates
            if (diff < 60) return 'Just now';
            if (diff < 3600) return `${Math.floor(diff / 60)}m ago`;
            if (diff < 86400) return `${Math.floor(diff / 3600)}h ago`;
            if (diff < 172800) return 'Yesterday';

            // Show full date for older dates
            return date.toLocaleDateString();
        },

        // Pagination methods
        get totalPages() {
            return Math.ceil(this.stats.total / this.limit);
        },

        prevPage() {
            if (this.page > 1) {
                this.page--;
                this.loadNotifications();
            }
        },

        nextPage() {
            if (this.page < this.totalPages) {
                this.page++;
                this.loadNotifications();
            }
        },

        goToPage(pageNum) {
            this.page = pageNum;
            this.loadNotifications();
        }
    };
}