/**
 * @fileoverview Post Form Component for Rantii
 * @author retoor <retoor@molodetz.nl>
 * @description Form for creating new rants
 * @keywords post, form, create, rant, new
 */

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

class PostForm extends BaseComponent {
    init() {
        this.isSubmitting = false;
        this.render();
        this.bindEvents();
        this.loadDraft();
    }

    render() {
        const isLoggedIn = this.isLoggedIn();

        this.addClass('post-form');

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

        this.setHtml(`
            <form class="post-form-inner">
                <header class="form-header">
                    <h2>Create Rant</h2>
                    <button type="button" class="close-btn" aria-label="Close">
                        <svg viewBox="0 0 24 24" width="24" height="24">
                            <path fill="currentColor" d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12z"/>
                        </svg>
                    </button>
                </header>
                <div class="form-group">
                    <textarea
                        class="post-input"
                        placeholder="What's on your mind?"
                        rows="6"
                        maxlength="5000"
                        ${this.isSubmitting ? 'disabled' : ''}></textarea>
                </div>
                <div class="form-group">
                    <input
                        type="text"
                        class="tags-input"
                        placeholder="Tags (comma separated)"
                        maxlength="100"
                        ${this.isSubmitting ? 'disabled' : ''}>
                </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');
        const closeBtn = e.target.closest('.close-btn');

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

        if (closeBtn) {
            this.emit('close');
        }
    }

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

        if (this.isSubmitting) return;

        const textarea = this.$('.post-input');
        const tagsInput = this.$('.tags-input');

        if (!textarea) return;

        const text = textarea.value.trim();
        if (!text) {
            this.getApp()?.toast?.error('Please enter some text');
            return;
        }

        const tags = tagsInput ? tagsInput.value.trim() : '';

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

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

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

    saveDraft(text) {
        this.getStorage()?.setDraftRant(text);
    }

    clearDraft() {
        this.getStorage()?.clearDraftRant();
    }

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

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

customElements.define('post-form', PostForm);

class PostModal extends BaseComponent {
    init() {
        this.keydownHandler = (e) => this.handleKeydown(e);
        this.render();
        this.bindEvents();
    }

    render() {
        this.addClass('modal', 'post-modal');

        this.setHtml(`
            <div class="modal-backdrop"></div>
            <div class="modal-content">
                <post-form></post-form>
            </div>
        `);

        requestAnimationFrame(() => this.addClass('modal-visible'));
    }

    bindEvents() {
        this.on(this, 'click', this.handleClick);
        this.on(this, 'close', this.close);
        this.on(this, 'post-created', this.close);
        document.addEventListener('keydown', this.keydownHandler);
    }

    handleClick(e) {
        if (e.target.classList.contains('modal-backdrop')) {
            this.close();
        }
    }

    handleKeydown(e) {
        if (e.key === 'Escape') {
            this.close();
        }
    }

    close() {
        document.removeEventListener('keydown', this.keydownHandler);
        this.removeClass('modal-visible');
        setTimeout(() => this.remove(), 300);
    }

    open() {
        document.body.appendChild(this);
        const form = this.$('post-form');
        if (form) {
            form.focus();
        }
    }
}

customElements.define('post-modal', PostModal);

export { PostForm, PostModal };