import { Editor } from '@tiptap/core';
import StarterKit from '@tiptap/starter-kit';
import { Markdown } from 'tiptap-markdown';
import Placeholder from '@tiptap/extension-placeholder';
import BubbleMenu from '@tiptap/extension-bubble-menu';
import './styles.css';
import 'remixicon/fonts/remixicon.css';

// DOM Elements
const saveBtn = document.getElementById('save-btn');
const editorContainer = document.getElementById('editor-container');
const bubbleMenuEl = document.getElementById('bubble-menu');

// Editor Instance
let editor;
let currentFileId = null;

// CSRF Helper
function getCookie(name) {
    let cookieValue = null;
    if (document.cookie && document.cookie !== '') {
        const cookies = document.cookie.split(';');
        for (let i = 0; i < cookies.length; i++) {
            const cookie = cookies[i].trim();
            if (cookie.substring(0, name.length + 1) === (name + '=')) {
                cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
                break;
            }
        }
    }
    return cookieValue;
}

// Initialize Editor (only once)
function initEditor() {
    // Bubble Menu Buttons
    const btnBold = document.getElementById('btn-bold');
    const btnItalic = document.getElementById('btn-italic');
    const btnStrike = document.getElementById('btn-strike');
    const btnCode = document.getElementById('btn-code');

    editor = new Editor({
        element: document.querySelector('#editor'),
        extensions: [
            StarterKit,
            Markdown,
            Placeholder.configure({
                placeholder: "Type '/' for commands...",
            }),
            BubbleMenu.configure({
                element: bubbleMenuEl,
                tippyOptions: { duration: 100 },
            }),
        ],
        content: '',
        editorProps: {
            attributes: {
                class: 'prose prose-sm sm:prose lg:prose-lg max-w-none focus:outline-none',
            },
        },
        onSelectionUpdate({ editor }) {
            btnBold?.classList.toggle('is-active', editor.isActive('bold'));
            btnItalic?.classList.toggle('is-active', editor.isActive('italic'));
            btnStrike?.classList.toggle('is-active', editor.isActive('strike'));
            btnCode?.classList.toggle('is-active', editor.isActive('code'));
        }
    });

    // Bubble Menu Listeners
    if (btnBold) btnBold.addEventListener('click', () => editor.chain().focus().toggleBold().run());
    if (btnItalic) btnItalic.addEventListener('click', () => editor.chain().focus().toggleItalic().run());
    if (btnStrike) btnStrike.addEventListener('click', () => editor.chain().focus().toggleStrike().run());
    if (btnCode) btnCode.addEventListener('click', () => editor.chain().focus().toggleCode().run());

    // Container Focus
    if (editorContainer) {
        editorContainer.addEventListener('click', () => {
            if (editor && !editor.isFocused) {
                editor.chain().focus().run();
            }
        });
    }

    // Expose to global scope for SPA usage
    window.editorInstance = editor;
    window.setEditorFileId = (fileId) => { currentFileId = fileId; };
}

// Save Content
if (saveBtn) {
    saveBtn.addEventListener('click', async () => {
        if (!editor || !currentFileId) return;

        saveBtn.disabled = true;
        saveBtn.textContent = 'Saving...';

        const markdownContent = editor.storage.markdown.getMarkdown();
        const saveUrl = `/file/content/${currentFileId}/save/`;

        try {
            const response = await fetch(saveUrl, {
                method: 'POST',
                headers: {
                    'Content-Type': 'application/json',
                    'X-CSRFToken': getCookie('csrftoken')
                },
                body: JSON.stringify({ content: markdownContent })
            });

            if (response.ok) {
                saveBtn.textContent = 'Saved!';
                setTimeout(() => {
                    saveBtn.textContent = 'Save Changes';
                    saveBtn.disabled = false;
                }, 1000);
            } else {
                throw new Error('Save failed');
            }
        } catch (err) {
            alert('Failed to save file');
            saveBtn.textContent = 'Save Changes';
            saveBtn.disabled = false;
        }
    });
}

// Initialize editor on load
if (document.querySelector('#editor')) {
    initEditor();
}