const sqlite3 = require('sqlite3').verbose();
const path = require('path');
const bcrypt = require('bcryptjs');

const dbPath = process.env.DB_PATH || path.join(__dirname, '../data/database.sqlite');
const db = new sqlite3.Database(dbPath);

console.log('Using database at', dbPath);

db.serialize(() => {
    // Users: mit created_at fuer Client-Ablauf (30 Tage)
    db.run(`CREATE TABLE IF NOT EXISTS users (
        id INTEGER PRIMARY KEY AUTOINCREMENT,
        username TEXT UNIQUE NOT NULL,
        password_hash TEXT NOT NULL,
        role TEXT NOT NULL DEFAULT 'client',
        created_at DATETIME DEFAULT CURRENT_TIMESTAMP
    )`);

    // Migration: created_at hinzufuegen falls Tabelle schon existiert
    db.run(`ALTER TABLE users ADD COLUMN created_at DATETIME DEFAULT CURRENT_TIMESTAMP`, (err) => {
        // Ignoriere Fehler wenn Spalte schon existiert
    });

    // Ordner-Zuweisung (neu)
    db.run(`CREATE TABLE IF NOT EXISTS user_folders (
        user_id INTEGER,
        folder_name TEXT,
        FOREIGN KEY(user_id) REFERENCES users(id),
        UNIQUE(user_id, folder_name)
    )`);

    // Alte Tabelle behalten fuer Kompatibilitaet, aber nicht mehr nutzen
    db.run(`CREATE TABLE IF NOT EXISTS user_images (
        user_id INTEGER,
        image_name TEXT,
        FOREIGN KEY(user_id) REFERENCES users(id),
        UNIQUE(user_id, image_name)
    )`);

    // Default-Admin erstellen wenn keiner existiert
    db.get('SELECT * FROM users WHERE username = ?', ['admin'], (err, row) => {
        if (!row) {
            const hash = bcrypt.hashSync('admin123', 10);
            db.run('INSERT INTO users (username, password_hash, role) VALUES (?, ?, ?)', ['admin', hash, 'admin']);
            console.log('Default admin created: admin / admin123');
        }
    });
});

module.exports = db;