import fs from 'node:fs';
import path from 'node:path';

import Database from 'better-sqlite3';

import type { AppConfig } from './config.js';

const schemaSql = `
CREATE TABLE IF NOT EXISTS users (
  id TEXT PRIMARY KEY,
  username TEXT NOT NULL UNIQUE,
  password_hash TEXT NOT NULL,
  token_version INTEGER NOT NULL DEFAULT 1,
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS save_snapshots (
  user_id TEXT PRIMARY KEY,
  version INTEGER NOT NULL,
  saved_at TEXT NOT NULL,
  bottom_tab TEXT NOT NULL,
  game_state_json TEXT NOT NULL,
  current_story_json TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE TABLE IF NOT EXISTS runtime_settings (
  user_id TEXT PRIMARY KEY,
  music_volume REAL NOT NULL,
  updated_at TEXT NOT NULL,
  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE TABLE IF NOT EXISTS custom_world_profiles (
  user_id TEXT NOT NULL,
  profile_id TEXT NOT NULL,
  payload_json TEXT NOT NULL,
  updated_at TEXT NOT NULL,
  PRIMARY KEY (user_id, profile_id),
  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);
`;

export type AppDatabase = Database.Database;

export function createDatabase(config: AppConfig) {
  const sqliteDir = path.dirname(config.sqlitePath);
  fs.mkdirSync(sqliteDir, { recursive: true });

  const db = new Database(config.sqlitePath);
  db.pragma('journal_mode = WAL');
  db.pragma('foreign_keys = ON');
  db.exec(schemaSql);
  return db;
}