/**
 * @fileoverview Vote Buttons Component for Rantii
 * @author retoor <retoor@molodetz.nl>
 * @description Upvote and downvote controls for rants and comments
 * @keywords vote, upvote, downvote, score, rating
 */

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

class VoteButtons extends BaseComponent {
    static get observedAttributes() {
        return ['score', 'vote-state', 'type', 'item-id', 'disabled'];
    }

    init() {
        this.render();
        this.bindEvents();
    }

    render() {
        const score = parseInt(this.getAttr('score') || '0', 10);
        const voteState = parseInt(this.getAttr('vote-state') || '0', 10);
        const disabled = this.hasAttr('disabled');

        this.addClass('vote-buttons');

        this.setHtml(`
            <button class="vote-btn upvote ${voteState === 1 ? 'active' : ''}"
                    aria-label="Upvote"
                    ${disabled ? 'disabled' : ''}>
                <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>
            </button>
            <span class="vote-score ${voteState === 1 ? 'positive' : ''} ${voteState === -1 ? 'negative' : ''}">${score}</span>
            <button class="vote-btn downvote ${voteState === -1 ? 'active' : ''}"
                    aria-label="Downvote"
                    ${disabled ? 'disabled' : ''}>
                <svg viewBox="0 0 24 24" width="20" height="20">
                    <path fill="currentColor" d="M7.41 8.59L12 13.17l4.59-4.58L18 10l-6 6-6-6z"/>
                </svg>
            </button>
        `);
    }

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

    handleClick(e) {
        const btn = e.target.closest('.vote-btn');
        if (!btn || btn.disabled) return;

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

        const currentState = parseInt(this.getAttr('vote-state') || '0', 10);
        let newVote;

        if (btn.classList.contains('upvote')) {
            newVote = currentState === 1 ? 0 : 1;
        } else if (btn.classList.contains('downvote')) {
            newVote = currentState === -1 ? 0 : -1;
        }

        if (newVote !== undefined) {
            this.emit('vote', {
                vote: newVote,
                type: this.getAttr('type'),
                itemId: this.getAttr('item-id')
            });
        }
    }

    setScore(score) {
        this.setAttr('score', score.toString());
        const scoreEl = this.$('.vote-score');
        if (scoreEl) {
            scoreEl.textContent = score;
        }
    }

    setVoteState(state) {
        this.setAttr('vote-state', state.toString());
        this.render();
    }

    updateVote(score, voteState) {
        this.setAttr('score', score.toString());
        this.setAttr('vote-state', voteState.toString());
        this.render();
    }

    disable() {
        this.setAttr('disabled', '');
        this.render();
    }

    enable() {
        this.removeAttribute('disabled');
        this.render();
    }

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

customElements.define('vote-buttons', VoteButtons);

export { VoteButtons };