CREATE TABLE IF NOT EXISTS users (
  id TEXT PRIMARY KEY,
  username TEXT NOT NULL UNIQUE,
  name TEXT NOT NULL,
  password_hash TEXT NOT NULL,
  role TEXT NOT NULL DEFAULT 'user' CHECK (role IN ('user', 'admin')),
  avatar_url TEXT NOT NULL DEFAULT '',
  state TEXT NOT NULL DEFAULT '',
  created_at TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS questions (
  id TEXT PRIMARY KEY,
  author_id TEXT NOT NULL REFERENCES users(id),
  title TEXT NOT NULL,
  body TEXT NOT NULL,
  city TEXT NOT NULL DEFAULT '',
  hunt_date TEXT NOT NULL,
  hidden INTEGER NOT NULL DEFAULT 0,
  created_at TEXT NOT NULL
);

CREATE INDEX IF NOT EXISTS idx_questions_hunt_date ON questions(hunt_date, hidden);

CREATE TABLE IF NOT EXISTS votes (
  user_id TEXT NOT NULL REFERENCES users(id),
  question_id TEXT NOT NULL REFERENCES questions(id) ON DELETE CASCADE,
  value INTEGER NOT NULL CHECK (value IN (-1, 1)),
  PRIMARY KEY (user_id, question_id)
);

CREATE TABLE IF NOT EXISTS answers (
  question_id TEXT PRIMARY KEY REFERENCES questions(id) ON DELETE CASCADE,
  author_id TEXT NOT NULL REFERENCES users(id),
  body TEXT NOT NULL,
  created_at TEXT NOT NULL,
  updated_at TEXT NOT NULL
);

CREATE TABLE IF NOT EXISTS sessions (
  token TEXT PRIMARY KEY,
  data BYTEA NOT NULL,
  expiry TIMESTAMPTZ NOT NULL
);
CREATE INDEX IF NOT EXISTS sessions_expiry_idx ON sessions (expiry);