/**
 * @fileoverview User Avatar Component for Rantii
 * @author retoor <retoor@molodetz.nl>
 * @description Displays user avatar with fallback to initials
 * @keywords avatar, user, profile, image, picture
 */

import { BaseComponent } from './base-component.js';
import { buildAvatarUrl } from '../utils/url.js';

class UserAvatar extends BaseComponent {
    static get observedAttributes() {
        return ['avatar', 'username', 'size', 'user-id'];
    }

    init() {
        this.render();
    }

    render() {
        const avatarData = this.getAttr('avatar');
        const username = this.getAttr('username') || '';
        const size = this.getAttr('size') || 'medium';
        const userId = this.getAttr('user-id');

        this.addClass('avatar', `avatar-${size}`);

        let avatar = null;
        if (avatarData) {
            try {
                avatar = JSON.parse(avatarData);
            } catch (e) {
                avatar = null;
            }
        }

        const bgColor = avatar?.b || '#54556e';
        const imageUrl = buildAvatarUrl(avatar);

        if (imageUrl) {
            this.setHtml(`
                <div class="avatar-wrapper" style="background-color: ${bgColor}">
                    <img class="avatar-image" src="${imageUrl}" alt="${username}" loading="lazy">
                </div>
            `);
        } else {
            const initials = this.getInitials(username);
            this.setHtml(`
                <div class="avatar-wrapper avatar-initials" style="background-color: ${bgColor}">
                    <span>${initials}</span>
                </div>
            `);
        }

        if (userId || username) {
            this.style.cursor = 'pointer';
            this.setAttribute('role', 'button');
            this.setAttribute('tabindex', '0');
        }
    }

    getInitials(username) {
        if (!username) return '?';
        return username.substring(0, 2).toUpperCase();
    }

    onAttributeChanged(name, oldValue, newValue) {
        this.render();
    }

    onConnected() {
        this.on(this, 'click', this.handleClick);
        this.on(this, 'keydown', this.handleKeydown);
    }

    handleClick(e) {
        const username = this.getAttr('username');
        if (username) {
            this.getRouter()?.goToUser(username);
        }
    }

    handleKeydown(e) {
        if (e.key === 'Enter' || e.key === ' ') {
            e.preventDefault();
            this.handleClick(e);
        }
    }

    setAvatar(avatar, username) {
        if (avatar && typeof avatar === 'object') {
            this.setAttr('avatar', JSON.stringify(avatar));
        }
        if (username) {
            this.setAttr('username', username);
        }
        this.render();
    }
}

customElements.define('user-avatar', UserAvatar);

export { UserAvatar };