/**
 * @fileoverview Comment Form Component for Rantii
 * @author retoor <retoor@molodetz.nl>
 * @description Form for posting new comments
 * @keywords comment, form, post, reply, input
 */

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

class CommentForm extends BaseComponent {
    static get observedAttributes() {
        return ['rant-id'];
    }

    init() {
        this.isSubmitting = false;
        this.render();
        this.bindEvents();
        this.loadDraft();
    }

    render() {
        const rantId = this.getAttr('rant-id');
        const isLoggedIn = this.isLoggedIn();

        this.addClass('comment-form');

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

        this.setHtml(`
            <form class="comment-form-inner">
                <div class="form-group">
                    <textarea
                        class="comment-input"
                        placeholder="Write a comment..."
                        rows="3"
                        maxlength="5000"
                        ${this.isSubmitting ? 'disabled' : ''}></textarea>
                </div>
                <div class="form-actions">
                    <span class="char-count">0 / 5000</span>
                    <button type="submit"
                            class="btn btn-primary submit-btn"
                            ${this.isSubmitting ? 'disabled' : ''}>
                        ${this.isSubmitting ? '<loading-spinner size="small"></loading-spinner>' : 'Post'}
                    </button>
                </div>
            </form>
        `);
    }

    bindEvents() {
        this.on(this, 'click', this.handleClick);
        this.on(this, 'submit', this.handleSubmit);
        this.on(this, 'input', this.handleInput);
    }

    handleClick(e) {
        const loginBtn = e.target.closest('.login-btn');
        if (loginBtn) {
            this.getRouter()?.goToLogin();
        }
    }

    async handleSubmit(e) {
        e.preventDefault();

        if (this.isSubmitting) return;

        const textarea = this.$('.comment-input');
        if (!textarea) return;

        const text = textarea.value.trim();
        if (!text) return;

        const rantId = this.getAttr('rant-id');
        if (!rantId) return;

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

        try {
            const result = await this.getApi()?.postComment(rantId, text);
            if (result?.success) {
                this.clearDraft();
                this.emit('comment-posted', { rantId, comment: result.comment });
                this.isSubmitting = false;
                this.render();
            } else {
                this.getApp()?.toast?.error(result?.error || 'Failed to post comment');
                this.isSubmitting = false;
                this.render();
            }
        } catch (error) {
            this.getApp()?.toast?.error('Failed to post comment');
            this.isSubmitting = false;
            this.render();
        }
    }

    handleInput(e) {
        if (e.target.classList.contains('comment-input')) {
            const textarea = e.target;
            const count = textarea.value.length;
            const countEl = this.$('.char-count');
            if (countEl) {
                countEl.textContent = `${count} / 5000`;
            }
            this.saveDraft(textarea.value);
        }
    }

    loadDraft() {
        const rantId = this.getAttr('rant-id');
        if (rantId) {
            const draft = this.getStorage()?.getDraftComment(rantId);
            if (draft) {
                const textarea = this.$('.comment-input');
                if (textarea) {
                    textarea.value = draft;
                    const countEl = this.$('.char-count');
                    if (countEl) {
                        countEl.textContent = `${draft.length} / 5000`;
                    }
                }
            }
        }
    }

    saveDraft(text) {
        const rantId = this.getAttr('rant-id');
        if (rantId) {
            this.getStorage()?.setDraftComment(rantId, text);
        }
    }

    clearDraft() {
        const rantId = this.getAttr('rant-id');
        if (rantId) {
            this.getStorage()?.clearDraftComment(rantId);
        }
    }

    reset() {
        const textarea = this.$('.comment-input');
        if (textarea) {
            textarea.value = '';
        }
        const countEl = this.$('.char-count');
        if (countEl) {
            countEl.textContent = '0 / 5000';
        }
        this.clearDraft();
    }

    focus() {
        const textarea = this.$('.comment-input');
        if (textarea) {
            textarea.focus();
        }
    }

    onAttributeChanged(name, oldValue, newValue) {
        if (name === 'rant-id') {
            this.loadDraft();
        }
    }
}

customElements.define('comment-form', CommentForm);

export { CommentForm };