import Database from 'better-sqlite3';
import { mkdirSync } from 'fs';

mkdirSync('data', { recursive: true });

const db = new Database('data/fiddles.db');
db.pragma('journal_mode = WAL');
db.pragma('foreign_keys = ON');

db.exec(`
  CREATE TABLE IF NOT EXISTS fiddles (
    id TEXT PRIMARY KEY,
    title TEXT NOT NULL DEFAULT 'Untitled',
    html TEXT NOT NULL DEFAULT '',
    css TEXT NOT NULL DEFAULT '',
    css_type TEXT NOT NULL DEFAULT 'css',
    js TEXT NOT NULL DEFAULT '',
    js_type TEXT NOT NULL DEFAULT 'javascript',
    created_at TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at TEXT NOT NULL DEFAULT (datetime('now'))
  )
`);

// Migration: add js_type column for existing databases
try {
  db.exec(`ALTER TABLE fiddles ADD COLUMN js_type TEXT NOT NULL DEFAULT 'javascript'`);
} catch (_) { /* column already exists */ }

export const stmts = {
  insert: db.prepare(`
    INSERT INTO fiddles (id, title, html, css, css_type, js, js_type)
    VALUES (@id, @title, @html, @css, @css_type, @js, @js_type)
  `),
  get: db.prepare('SELECT * FROM fiddles WHERE id = ?'),
  update: db.prepare(`
    UPDATE fiddles SET title = @title, html = @html, css = @css,
      css_type = @css_type, js = @js, js_type = @js_type, updated_at = datetime('now')
    WHERE id = @id
  `),
  list: db.prepare('SELECT id, title, css_type, js_type, created_at, updated_at FROM fiddles ORDER BY updated_at DESC LIMIT 50'),
};

export default db;