/**
 * Notification Manager Module
 * Handles system notifications, alerts, and toasts
 */

export default class NotificationManager {
    constructor(app) {
        this.app = app;
        this.container = null;
        this.queue = [];
        this.maxNotifications = 3;
        this.defaultDuration = 3000;
        this.notificationCount = 0;
    }

    async initialize() {
        this.setupNotificationContainer();
        this.setupEventListeners();
        await this.checkNotificationPermission();
    }

    setupNotificationContainer() {
        // Create container for notifications if it doesn't exist
        if (!this.container) {
            this.container = document.createElement('div');
            this.container.className = 'notifications-container';
            document.body.appendChild(this.container);
        }
    }

    setupEventListeners() {
        // Handle notification interactions
        this.container.addEventListener('click', (e) => {
            const notification = e.target.closest('.notification');
            if (notification) {
                if (e.target.classList.contains('notification-close')) {
                    this.dismiss(notification);
                } else {
                    this.handleNotificationClick(notification);
                }
            }
        });

        // Handle animation end
        this.container.addEventListener('animationend', (e) => {
            if (e.target.classList.contains('notification') && 
                e.target.classList.contains('hiding')) {
                e.target.remove();
                this.notificationCount--;
                this.processQueue();
            }
        });
    }

    async checkNotificationPermission() {
        if ('Notification' in window) {
            // Check if we already have permission
            if (Notification.permission === 'default') {
                try {
                    const permission = await Notification.requestPermission();
                    if (permission === 'granted') {
                        console.log('Notification permission granted');
                    }
                } catch (error) {
                    console.warn('Failed to request notification permission:', error);
                }
            }
        }
    }

    show(message, type = 'success', options = {}) {
        const notificationData = {
            message,
            type,
            options: {
                duration: options.duration || this.defaultDuration,
                icon: this.getIconForType(type),
                action: options.action || null,
                actionText: options.actionText || null,
                progress: options.progress || false,
                html: options.html || false,
                sound: options.sound !== false,
                ...options
            }
        };

        if (this.notificationCount >= this.maxNotifications) {
            this.queue.push(notificationData);
        } else {
            this.createNotification(notificationData);
        }
    }

    createNotification({ message, type, options }) {
        const notification = document.createElement('div');
        notification.className = `notification ${type}`;
        notification.setAttribute('role', 'alert');

        // Create notification content
        const content = document.createElement('div');
        content.className = 'notification-content';
        
        // Add icon if provided
        if (options.icon) {
            const icon = document.createElement('span');
            icon.className = 'notification-icon';
            icon.textContent = options.icon;
            content.appendChild(icon);
        }

        // Add message
        const messageElement = document.createElement('span');
        messageElement.className = 'notification-message';
        if (options.html) {
            messageElement.innerHTML = message;
        } else {
            messageElement.textContent = message;
        }
        content.appendChild(messageElement);

        notification.appendChild(content);

        // Add action button if provided
        if (options.action && options.actionText) {
            const actionButton = document.createElement('button');
            actionButton.className = 'notification-action';
            actionButton.textContent = options.actionText;
            actionButton.addEventListener('click', (e) => {
                e.stopPropagation();
                options.action();
                this.dismiss(notification);
            });
            notification.appendChild(actionButton);
        }

        // Add close button
        const closeButton = document.createElement('button');
        closeButton.className = 'notification-close';
        closeButton.innerHTML = '×';
        closeButton.setAttribute('aria-label', 'Close notification');
        notification.appendChild(closeButton);

        // Add progress bar if enabled
        if (options.progress) {
            const progressBar = document.createElement('div');
            progressBar.className = 'notification-progress';
            notification.appendChild(progressBar);
        }

        // Play sound if enabled
        if (options.sound) {
            this.playNotificationSound();
        }

        // Add to container
        this.container.appendChild(notification);
        this.notificationCount++;

        // Trigger system notification if app is not focused
        if (document.hidden && Notification.permission === 'granted') {
            this.showSystemNotification(message, type);
        }

        // Auto dismiss after duration
        if (options.duration > 0) {
            setTimeout(() => {
                this.dismiss(notification);
            }, options.duration);
        }

        // Return notification element for potential future reference
        return notification;
    }

    dismiss(notification) {
        if (!notification.classList.contains('hiding')) {
            notification.classList.add('hiding');
            notification.style.height = notification.offsetHeight + 'px';
            requestAnimationFrame(() => {
                notification.style.height = '0';
                notification.style.margin = '0';
                notification.style.padding = '0';
            });
        }
    }

    processQueue() {
        if (this.queue.length > 0 && this.notificationCount < this.maxNotifications) {
            const nextNotification = this.queue.shift();
            this.createNotification(nextNotification);
        }
    }

    clear() {
        this.queue = [];
        const notifications = this.container.querySelectorAll('.notification');
        notifications.forEach(notification => this.dismiss(notification));
    }

    getIconForType(type) {
        switch (type) {
            case 'success': return '✅';
            case 'error': return '❌';
            case 'warning': return '⚠️';
            case 'info': return 'ℹ️';
            default: return null;
        }
    }

    handleNotificationClick(notification) {
        // Handle notification click events
        const data = notification.dataset;
        if (data.action) {
            try {
                const action = new Function(data.action);
                action.call(this.app);
            } catch (error) {
                console.error('Failed to execute notification action:', error);
            }
        }
    }

    playNotificationSound() {
        // Create and play notification sound
        const audio = new Audio('data:audio/mp3;base64,SUQzBAAAAAAAI1RTU0UAAAAPAAADTGF2ZjU4LjI5LjEwMAAAAAAAAAAAAAAA//OEAAAAAAAAAAAAAAAAAAAAAAAASW5mbwAAAA8AAAAUAAAiUAAYGBgYJCQkJCQwMDAwMDw8PDw8SEhISEhUVFRUVGBgYGBgbGxsbGx4eHh4eISEhISEkJCQkJCcnJycnKioqKiotLS0tLS8vLy8vMjIyMjI1NTU1NTg4ODg4OTk5OTk8PDw8PD////////////////////8AAAAATGF2YzU4LjU0AAAAAAAAAAAAAAAAJAYAAAAAAAAAIlA+Z2YAN///////////////////////////////////////////////////////////////////////////8227K7stdiUKJS5QQEBAQEAhISEhIBwcHBwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA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