/**
 * @fileoverview Notification List Component for Rantii
 * @author retoor <retoor@molodetz.nl>
 * @description Displays user notifications and mentions
 * @keywords notification, list, alerts, mentions, updates
 */

import { BaseComponent } from './base-component.js';
import { formatRelativeTime } from '../utils/date.js';

class NotificationList extends BaseComponent {
    init() {
        this.notifications = [];
        this.isLoading = false;
        this.unreadCount = 0;
        this.render();
        this.bindEvents();
    }

    async load() {
        if (!this.isLoggedIn()) {
            this.render();
            return;
        }

        this.isLoading = true;
        this.render();

        try {
            const result = await this.getApi()?.getNotifications();
            if (result?.success) {
                this.notifications = result.notifications || [];
                this.unreadCount = result.unread?.total || 0;
            }
        } catch (error) {
            this.notifications = [];
        } finally {
            this.isLoading = false;
            this.render();
        }
    }

    render() {
        this.addClass('notification-list');

        if (!this.isLoggedIn()) {
            this.setHtml(`
                <div class="notification-auth">
                    <p>Sign in to view notifications</p>
                    <button class="btn btn-primary login-btn">Sign In</button>
                </div>
            `);
            return;
        }

        if (this.isLoading) {
            this.setHtml(`
                <div class="notification-loading">
                    <loading-spinner text="Loading notifications..."></loading-spinner>
                </div>
            `);
            return;
        }

        if (this.notifications.length === 0) {
            this.setHtml(`
                <div class="notification-empty">
                    <svg viewBox="0 0 24 24" width="48" height="48">
                        <path fill="currentColor" d="M12 22c1.1 0 2-.9 2-2h-4c0 1.1.9 2 2 2zm6-6v-5c0-3.07-1.63-5.64-4.5-6.32V4c0-.83-.67-1.5-1.5-1.5s-1.5.67-1.5 1.5v.68C7.64 5.36 6 7.92 6 11v5l-2 2v1h16v-1l-2-2zm-2 1H8v-6c0-2.48 1.51-4.5 4-4.5s4 2.02 4 4.5v6z"/>
                    </svg>
                    <p>No notifications</p>
                </div>
            `);
            return;
        }

        this.setHtml(`
            <header class="notification-header">
                <h2>Notifications</h2>
                ${this.unreadCount > 0 ? `
                    <button class="clear-btn">Mark all read</button>
                ` : ''}
            </header>
            <div class="notification-items">
                ${this.notifications.map(notif => `
                    <notification-item
                        data-notif='${JSON.stringify(notif).replace(/'/g, '&#39;')}'>
                    </notification-item>
                `).join('')}
            </div>
        `);

        this.initNotificationItems();
    }

    initNotificationItems() {
        const items = this.$$('notification-item');
        items.forEach(item => {
            const notifData = item.dataset.notif;
            if (notifData) {
                try {
                    const notif = JSON.parse(notifData.replace(/&#39;/g, "'"));
                    item.setNotification(notif);
                } catch (e) {}
            }
        });
    }

    bindEvents() {
        this.on(this, 'click', this.handleClick);
    }

    handleClick(e) {
        const loginBtn = e.target.closest('.login-btn');
        const clearBtn = e.target.closest('.clear-btn');

        if (loginBtn) {
            this.getRouter()?.goToLogin();
            return;
        }

        if (clearBtn) {
            this.clearNotifications();
        }
    }

    async clearNotifications() {
        try {
            await this.getApi()?.clearNotifications();
            this.unreadCount = 0;
            this.emit('notifications-cleared');
            await this.load();
        } catch (error) {}
    }

    onConnected() {
        this.load();
    }

    onDisconnected() {
        this.isLoading = false;
    }

    getUnreadCount() {
        return this.unreadCount;
    }

    refresh() {
        this.load();
    }
}

customElements.define('notification-list', NotificationList);

class NotificationItem extends BaseComponent {
    init() {
        this.notifData = null;
        this.render();
        this.bindEvents();
    }

    setNotification(notif) {
        this.notifData = notif;
        this.render();
    }

    render() {
        if (!this.notifData) {
            this.setHtml('');
            return;
        }

        const notif = this.notifData;
        const isUnread = notif.read === 0;
        const typeLabel = this.getTypeLabel(notif.type);
        const username = notif.username || notif.user_username || notif.name || 'Someone';

        this.addClass('notification-item');
        if (isUnread) {
            this.addClass('unread');
        }

        this.setHtml(`
            <div class="notif-content">
                <div class="notif-icon">${this.getTypeIcon(notif.type)}</div>
                <div class="notif-body">
                    <span class="notif-username">${username}</span>
                    <span class="notif-action">${typeLabel}</span>
                </div>
                <time class="notif-time">${formatRelativeTime(notif.created_time)}</time>
            </div>
        `);
    }

    getTypeLabel(type) {
        const labels = {
            'comment_mention': 'mentioned you',
            'comment_content': 'commented on your rant',
            'comment_vote': 'upvoted your comment',
            'rant_vote': 'upvoted your rant',
            'comment_discuss': 'replied to a discussion'
        };
        return labels[type] || 'interacted';
    }

    getTypeIcon(type) {
        if (type.includes('mention')) {
            return `<svg viewBox="0 0 24 24" width="20" height="20"><path fill="currentColor" d="M12 2C6.48 2 2 6.48 2 12s4.48 10 10 10h5v-2h-5c-4.34 0-8-3.66-8-8s3.66-8 8-8 8 3.66 8 8v1.43c0 .79-.71 1.57-1.5 1.57s-1.5-.78-1.5-1.57V12c0-2.76-2.24-5-5-5s-5 2.24-5 5 2.24 5 5 5c1.38 0 2.64-.56 3.54-1.47.65.89 1.77 1.47 2.96 1.47 1.97 0 3.5-1.6 3.5-3.57V12c0-5.52-4.48-10-10-10zm0 13c-1.66 0-3-1.34-3-3s1.34-3 3-3 3 1.34 3 3-1.34 3-3 3z"/></svg>`;
        }
        if (type.includes('vote')) {
            return `<svg viewBox="0 0 24 24" width="20" height="20"><path fill="currentColor" d="M7.41 15.41L12 10.83l4.59 4.58L18 14l-6-6-6 6z"/></svg>`;
        }
        return `<svg viewBox="0 0 24 24" width="20" height="20"><path fill="currentColor" d="M21.99 4c0-1.1-.89-2-1.99-2H4c-1.1 0-2 .9-2 2v12c0 1.1.9 2 2 2h14l4 4-.01-18z"/></svg>`;
    }

    bindEvents() {
        this.on(this, 'click', this.handleClick);
    }

    handleClick() {
        if (this.notifData?.rant_id) {
            this.getRouter()?.goToRant(
                this.notifData.rant_id,
                this.notifData.comment_id
            );
        }
    }
}

customElements.define('notification-item', NotificationItem);

export { NotificationList, NotificationItem };