/**
 * FediStream Notifications JavaScript
 *
 * @package WP_FediStream
 */

( function( $ ) {
	'use strict';

	const Notifications = {
		unreadCount: 0,
		isOpen: false,
		pollTimer: null,

		init: function() {
			this.createDropdown();
			this.bindEvents();
			this.loadNotifications();
			this.startPolling();
		},

		createDropdown: function() {
			const dropdown = `
				<div class="fedistream-notifications-dropdown" style="display: none;">
					<div class="notifications-header">
						<h4>${fedistreamNotifications.i18n.viewAll || 'Notifications'}</h4>
						<button class="mark-all-read" title="${fedistreamNotifications.i18n.markAllRead}">
							<span class="dashicons dashicons-yes-alt"></span>
						</button>
					</div>
					<div class="notifications-list">
						<div class="loading">${fedistreamNotifications.i18n.loading || 'Loading...'}</div>
					</div>
					<div class="notifications-footer">
						<a href="#" class="view-all">${fedistreamNotifications.i18n.viewAll}</a>
					</div>
				</div>
			`;

			$( '.fedistream-notifications-menu' ).append( dropdown );
		},

		bindEvents: function() {
			const self = this;

			// Toggle dropdown.
			$( document ).on( 'click', '#wp-admin-bar-fedistream-notifications > a', function( e ) {
				e.preventDefault();
				self.toggleDropdown();
			} );

			// Close dropdown when clicking outside.
			$( document ).on( 'click', function( e ) {
				if ( ! $( e.target ).closest( '.fedistream-notifications-menu' ).length ) {
					self.closeDropdown();
				}
			} );

			// Mark all as read.
			$( document ).on( 'click', '.fedistream-notifications-dropdown .mark-all-read', function( e ) {
				e.preventDefault();
				e.stopPropagation();
				self.markAllRead();
			} );

			// Mark single as read.
			$( document ).on( 'click', '.notification-item', function() {
				const id = $( this ).data( 'id' );
				const isRead = $( this ).hasClass( 'is-read' );

				if ( ! isRead ) {
					self.markRead( id, $( this ) );
				}
			} );

			// Delete notification.
			$( document ).on( 'click', '.notification-item .delete-btn', function( e ) {
				e.preventDefault();
				e.stopPropagation();
				const item = $( this ).closest( '.notification-item' );
				const id = item.data( 'id' );
				self.deleteNotification( id, item );
			} );
		},

		toggleDropdown: function() {
			if ( this.isOpen ) {
				this.closeDropdown();
			} else {
				this.openDropdown();
			}
		},

		openDropdown: function() {
			$( '.fedistream-notifications-dropdown' ).show();
			this.isOpen = true;
			this.loadNotifications();
		},

		closeDropdown: function() {
			$( '.fedistream-notifications-dropdown' ).hide();
			this.isOpen = false;
		},

		loadNotifications: function() {
			const self = this;

			$.ajax( {
				url: fedistreamNotifications.ajaxUrl,
				type: 'POST',
				data: {
					action: 'fedistream_get_notifications',
					nonce: fedistreamNotifications.nonce,
					limit: 10
				},
				success: function( response ) {
					if ( response.success ) {
						self.renderNotifications( response.data.notifications );
						self.updateUnreadCount( response.data.unread_count );
					}
				},
				error: function() {
					$( '.notifications-list' ).html(
						'<p class="error">' + fedistreamNotifications.i18n.error + '</p>'
					);
				}
			} );
		},

		renderNotifications: function( notifications ) {
			const container = $( '.notifications-list' );
			container.empty();

			if ( ! notifications || notifications.length === 0 ) {
				container.html(
					'<p class="empty">' + fedistreamNotifications.i18n.noNotifications + '</p>'
				);
				return;
			}

			notifications.forEach( function( notification ) {
				container.append( this.createNotificationItem( notification ) );
			}, this );
		},

		createNotificationItem: function( notification ) {
			const isRead = notification.is_read ? 'is-read' : '';
			const icon = this.getNotificationIcon( notification.type );
			const time = this.formatTime( notification.created_at );
			const link = this.getNotificationLink( notification );

			return `
				<div class="notification-item ${isRead}" data-id="${notification.id}">
					<div class="notification-icon">
						<span class="dashicons dashicons-${icon}"></span>
					</div>
					<div class="notification-content">
						<div class="notification-title">${this.escapeHtml( notification.title )}</div>
						<div class="notification-message">${this.escapeHtml( notification.message )}</div>
						<div class="notification-time">${time}</div>
					</div>
					<div class="notification-actions">
						<button class="delete-btn" title="Delete">
							<span class="dashicons dashicons-no-alt"></span>
						</button>
					</div>
					${link ? `<a href="${link}" class="notification-link"></a>` : ''}
				</div>
			`;
		},

		getNotificationIcon: function( type ) {
			const icons = {
				'new_release': 'album',
				'new_follower': 'admin-users',
				'fediverse_like': 'heart',
				'fediverse_boost': 'megaphone',
				'playlist_added': 'playlist-audio',
				'purchase': 'cart',
				'system': 'info'
			};
			return icons[ type ] || 'bell';
		},

		getNotificationLink: function( notification ) {
			const data = notification.data || {};

			if ( data.album_url ) {
				return data.album_url;
			}
			if ( data.track_url ) {
				return data.track_url;
			}
			if ( data.artist_url ) {
				return data.artist_url;
			}

			return null;
		},

		markRead: function( notificationId, element ) {
			const self = this;

			$.ajax( {
				url: fedistreamNotifications.ajaxUrl,
				type: 'POST',
				data: {
					action: 'fedistream_mark_notification_read',
					nonce: fedistreamNotifications.nonce,
					notification_id: notificationId
				},
				success: function( response ) {
					if ( response.success ) {
						element.addClass( 'is-read' );
						self.updateUnreadCount( response.data.unread_count );
					}
				}
			} );
		},

		markAllRead: function() {
			const self = this;

			$.ajax( {
				url: fedistreamNotifications.ajaxUrl,
				type: 'POST',
				data: {
					action: 'fedistream_mark_all_notifications_read',
					nonce: fedistreamNotifications.nonce
				},
				success: function( response ) {
					if ( response.success ) {
						$( '.notification-item' ).addClass( 'is-read' );
						self.updateUnreadCount( 0 );
					}
				}
			} );
		},

		deleteNotification: function( notificationId, element ) {
			const self = this;

			$.ajax( {
				url: fedistreamNotifications.ajaxUrl,
				type: 'POST',
				data: {
					action: 'fedistream_delete_notification',
					nonce: fedistreamNotifications.nonce,
					notification_id: notificationId
				},
				success: function( response ) {
					if ( response.success ) {
						element.fadeOut( 200, function() {
							$( this ).remove();

							// Check if list is empty.
							if ( $( '.notification-item' ).length === 0 ) {
								$( '.notifications-list' ).html(
									'<p class="empty">' + fedistreamNotifications.i18n.noNotifications + '</p>'
								);
							}
						} );
						self.updateUnreadCount( response.data.unread_count );
					}
				}
			} );
		},

		updateUnreadCount: function( count ) {
			this.unreadCount = count;

			const badge = $( '.fedistream-notification-count' );

			if ( count > 0 ) {
				if ( badge.length ) {
					badge.text( count );
				} else {
					$( '#wp-admin-bar-fedistream-notifications .ab-icon' ).after(
						'<span class="fedistream-notification-count">' + count + '</span>'
					);
				}
			} else {
				badge.remove();
			}
		},

		startPolling: function() {
			const self = this;
			const interval = fedistreamNotifications.pollInterval || 60000;

			this.pollTimer = setInterval( function() {
				if ( ! self.isOpen ) {
					self.checkForNewNotifications();
				}
			}, interval );
		},

		checkForNewNotifications: function() {
			const self = this;

			$.ajax( {
				url: fedistreamNotifications.ajaxUrl,
				type: 'POST',
				data: {
					action: 'fedistream_get_notifications',
					nonce: fedistreamNotifications.nonce,
					unread_only: true,
					limit: 1
				},
				success: function( response ) {
					if ( response.success ) {
						self.updateUnreadCount( response.data.unread_count );
					}
				}
			} );
		},

		formatTime: function( dateString ) {
			const date = new Date( dateString );
			const now = new Date();
			const diff = Math.floor( ( now - date ) / 1000 );

			if ( diff < 60 ) {
				return fedistreamNotifications.i18n.justNow || 'Just now';
			} else if ( diff < 3600 ) {
				const mins = Math.floor( diff / 60 );
				return mins + 'm ago';
			} else if ( diff < 86400 ) {
				const hours = Math.floor( diff / 3600 );
				return hours + 'h ago';
			} else if ( diff < 604800 ) {
				const days = Math.floor( diff / 86400 );
				return days + 'd ago';
			} else {
				return date.toLocaleDateString();
			}
		},

		escapeHtml: function( text ) {
			const div = document.createElement( 'div' );
			div.textContent = text;
			return div.innerHTML;
		}
	};

	// Initialize on document ready.
	$( document ).ready( function() {
		if ( $( '.fedistream-notifications-menu' ).length ) {
			Notifications.init();
		}
	} );

} )( jQuery );