/**
 * Global application state and constants
 */

// Set to true to enable verbose console logging for development.
const DEBUG = false;

// Check if File System Access API is available
const hasFileSystemAccess = 'showDirectoryPicker' in window;

// Directory and file handles
let directoryHandle = null;
let fileTree = {};
let currentFileHandle = null;

// True when the page is served over HTTP(S) and the file tree is sourced
// from the server's JSON directory listing instead of the local FS API.
let serverSourceMode = false;

// Map to store editor instances for each file
// Key: file path, Value: { editor, container, tocContainer, etc. }
const editorInstances = new Map();

// Current TOC max depth (1-6)
let tocMaxDepth = 3;

// Scratchpad ID constant
const SCRATCHPAD_ID = '__scratchpad__';

// Default scratchpad markdown — shown the first time mdedit loads.
// Acts as both a welcome message and a starter pad for quick notes.
const SCRATCHPAD_WELCOME = [
    '# Welcome to ZDDC Markdown',
    '',
    'All editing happens locally on your computer — nothing is uploaded.',
    '',
    'Use this **Scratchpad** for quick notes. Download it any time with the ⬇',
    'button on the Scratchpad row in the file list.',
    '',
    'Click **Select Directory** above to open a folder of Markdown files,',
    'or just start typing here.',
    '',
].join('\n');