CREATE TABLE IF NOT EXISTS users (
  id uuid PRIMARY KEY,
  email text NOT NULL UNIQUE,
  nick text NOT NULL UNIQUE,
  data jsonb NOT NULL
);
CREATE TABLE IF NOT EXISTS sessions (
  hash text PRIMARY KEY,
  user_id uuid NOT NULL REFERENCES users(id),
  expires_at timestamptz NOT NULL
);
CREATE INDEX IF NOT EXISTS sessions_expiry ON sessions(expires_at);
CREATE TABLE IF NOT EXISTS rooms (
  id uuid PRIMARY KEY,
  code text NOT NULL UNIQUE,
  game_id text NOT NULL,
  game_version text NOT NULL,
  visibility text NOT NULL CHECK (visibility IN ('public','private')),
  status text NOT NULL CHECK (status IN ('waiting','playing','finished')),
  created_at timestamptz NOT NULL,
  data jsonb NOT NULL
);
CREATE INDEX IF NOT EXISTS rooms_status ON rooms(status,created_at DESC);
CREATE INDEX IF NOT EXISTS rooms_players ON rooms USING gin ((data->'players'));
CREATE TABLE IF NOT EXISTS match_events (
  room_id uuid NOT NULL REFERENCES rooms(id),
  sequence integer NOT NULL,
  action_id text NOT NULL,
  actor_id uuid NOT NULL REFERENCES users(id),
  data jsonb NOT NULL,
  PRIMARY KEY(room_id,sequence),
  UNIQUE(room_id,action_id)
);
CREATE TABLE IF NOT EXISTS chat_messages (
  id uuid PRIMARY KEY,
  room_id uuid NOT NULL REFERENCES rooms(id),
  user_id uuid NOT NULL REFERENCES users(id),
  data jsonb NOT NULL
);
CREATE INDEX IF NOT EXISTS chat_room ON chat_messages(room_id);
CREATE TABLE IF NOT EXISTS match_results (
  room_id uuid NOT NULL REFERENCES rooms(id),
  user_id uuid NOT NULL REFERENCES users(id),
  outcome text NOT NULL CHECK (outcome IN ('win','loss','draw')),
  placement integer NOT NULL CHECK (placement>0),
  reason text NOT NULL,
  PRIMARY KEY(room_id,user_id)
);
CREATE INDEX IF NOT EXISTS results_user ON match_results(user_id);