-- 009_live_persistence.sql — persistence for live races and lobby drivers.
--
-- The active race surface (lobby | countdown | racing) is now mirrored
-- in Postgres. finished_races continues to be the canonical archive
-- (no rename yet — it stays in the same shape and the next migration
-- will unify the two under a single `races` table).
--
-- live_races
--   One row per active race. Status is one of
--   lobby | countdown | racing. The `podium` column is reserved for
--   future use (we may eventually move finished_podium into this
--   table as well).
--
-- live_race_drivers
--   Many-to-many between live_races and drivers. The order column is
--   the car's slot in the race (0..max_cars-1).
--
-- lobby_drivers
--   Presence of a driver in the lobby: connected / idle / racing /
--   offline and the current race if racing.

CREATE TABLE IF NOT EXISTS live_races (
    id              TEXT PRIMARY KEY,
    name            TEXT NOT NULL,
    track_id        TEXT NOT NULL,
    max_cars        INT  NOT NULL,
    laps            INT  NOT NULL,
    time_limit_s    INT  NOT NULL,
    status          TEXT NOT NULL DEFAULT 'lobby'
                    CHECK (status IN ('lobby', 'countdown', 'racing', 'cancelled')),
    created_ms      BIGINT NOT NULL,
    started_ms      BIGINT NOT NULL DEFAULT 0,
    finished_ms     BIGINT NOT NULL DEFAULT 0,
    updated_ms      BIGINT NOT NULL
);

CREATE INDEX IF NOT EXISTS live_races_status_idx
    ON live_races (status, updated_ms DESC);
CREATE INDEX IF NOT EXISTS live_races_track_idx
    ON live_races (track_id);

CREATE TABLE IF NOT EXISTS live_race_drivers (
    race_id     TEXT NOT NULL REFERENCES live_races(id) ON DELETE CASCADE,
    driver_id   TEXT NOT NULL,
    slot        INT  NOT NULL DEFAULT 0,
    joined_ms   BIGINT NOT NULL,
    PRIMARY KEY (race_id, driver_id)
);

CREATE INDEX IF NOT EXISTS live_race_drivers_driver_idx
    ON live_race_drivers (driver_id);

CREATE TABLE IF NOT EXISTS lobby_drivers (
    driver_id     TEXT PRIMARY KEY,
    name          TEXT NOT NULL DEFAULT '',
    nickname      TEXT NOT NULL DEFAULT '',
    avatar_url    TEXT NOT NULL DEFAULT '',
    clan_id       TEXT NOT NULL DEFAULT '',
    clan_tag      TEXT NOT NULL DEFAULT '',
    status        TEXT NOT NULL DEFAULT 'idle'
                  CHECK (status IN ('idle', 'racing', 'offline')),
    current_race_id TEXT NOT NULL DEFAULT '',
    connected_ms  BIGINT NOT NULL,
    last_seen_ms  BIGINT NOT NULL
);

CREATE INDEX IF NOT EXISTS lobby_drivers_status_idx
    ON lobby_drivers (status);