// db.js
const Database = require('better-sqlite3');

const db = new Database('todos.db');
db.pragma('journal_mode = WAL');

// Création table si absente
db.exec(`
  CREATE TABLE IF NOT EXISTS users (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    pseudo TEXT NOT NULL,
    discord_id TEXT NOT NULL UNIQUE,
    created_at TEXT NOT NULL DEFAULT (datetime('now'))
  );

  CREATE TABLE IF NOT EXISTS todos (
    id INTEGER PRIMARY KEY AUTOINCREMENT,
    users_id INTEGER NOT NULL,
    title TEXT NOT NULL,
    completed INTEGER NOT NULL DEFAULT 0,
    created_at TEXT NOT NULL DEFAULT (datetime('now')),
    FOREIGN KEY (users_id) REFERENCES users(id) ON DELETE CASCADE
  );
`);

// Ajout de l'utilisateur test si absent
const userTest = db.prepare('SELECT * FROM users WHERE id = 1').get();
if (!userTest) {
    db.prepare('INSERT INTO users (id, pseudo, discord_id) VALUES (?, ?, ?)').run(1, 'test', 'null id');
}

module.exports = {
    // USERS
    allUsers: () => db.prepare('SELECT * FROM users ORDER BY id DESC').all(),
    getUserById: (id) => db.prepare('SELECT * FROM users WHERE id = ?').get(id),
    getUserByDiscordId: (discord_id) => db.prepare('SELECT * FROM users WHERE discord_id = ?').get(discord_id),
    createUser: (pseudo, discord_id) =>
        db.prepare('INSERT INTO users (pseudo, discord_id) VALUES (?, ?)').run(pseudo, discord_id),

    // TODOS
    allTodos: () => db.prepare('SELECT * FROM todos ORDER BY id DESC').all(),
    getTodo: (id) => db.prepare('SELECT * FROM todos WHERE id = ?').get(id),
    getTodosByUser: (users_id) => db.prepare('SELECT * FROM todos WHERE users_id = ? ORDER BY id DESC').all(users_id),
    createTodo: (users_id, title) =>
        db.prepare('INSERT INTO todos (users_id, title) VALUES (?, ?)').run(users_id, title),
    updateTodo: (id, { title, completed }) =>
        db.prepare('UPDATE todos SET title = COALESCE(?, title), completed = COALESCE(?, completed) WHERE id = ?')
            .run(title ?? null, typeof completed === 'number' ? completed : null, id),
    removeTodo: (id) => db.prepare('DELETE FROM todos WHERE id = ?').run(id),
};