PRAGMA foreign_keys = ON;

CREATE TABLE IF NOT EXISTS users (
  id TEXT PRIMARY KEY,
  email TEXT NOT NULL UNIQUE,
  username TEXT NOT NULL UNIQUE,
  password_hash TEXT NOT NULL,
  created_at INTEGER NOT NULL,
  updated_at INTEGER NOT NULL
);

CREATE TABLE IF NOT EXISTS sessions (
  id TEXT PRIMARY KEY,
  user_id TEXT NOT NULL,
  token_hash TEXT NOT NULL UNIQUE,
  expires_at INTEGER NOT NULL,
  created_at INTEGER NOT NULL,
  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE TABLE IF NOT EXISTS save_slots (
  id TEXT PRIMARY KEY,
  user_id TEXT NOT NULL,
  slot_key TEXT NOT NULL,
  label TEXT NOT NULL,
  state_json TEXT NOT NULL,
  revision INTEGER NOT NULL DEFAULT 1,
  created_at INTEGER NOT NULL,
  updated_at INTEGER NOT NULL,
  UNIQUE(user_id, slot_key),
  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
);

CREATE INDEX IF NOT EXISTS idx_sessions_user_id ON sessions(user_id);
CREATE INDEX IF NOT EXISTS idx_save_slots_user_id ON save_slots(user_id);