-- Author: fruit.com.cn
-- 剧单：运营编排的短剧集合，归属某个分类，并可关联多部短剧
-- 幂等，仅提交文件，由发布流程执行

CREATE TABLE IF NOT EXISTS drama_playlist (
  id                BIGINT PRIMARY KEY,
  classification_id BIGINT      NOT NULL DEFAULT 0,
  name              VARCHAR(64) NOT NULL,
  sort              INTEGER     NOT NULL DEFAULT 0,
  status            SMALLINT    NOT NULL DEFAULT 1,
  created_at        TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at        TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
);
CREATE UNIQUE INDEX IF NOT EXISTS uk_drama_playlist_name ON drama_playlist (name);
CREATE INDEX IF NOT EXISTS idx_drama_playlist_classification ON drama_playlist (classification_id);
COMMENT ON TABLE drama_playlist IS '剧单；归属分类，可关联多部短剧';

CREATE TABLE IF NOT EXISTS drama_playlist_drama (
  id          BIGINT PRIMARY KEY,
  playlist_id BIGINT NOT NULL,
  drama_id    BIGINT NOT NULL,
  created_at  TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
);
CREATE UNIQUE INDEX IF NOT EXISTS uk_playlist_drama ON drama_playlist_drama (playlist_id, drama_id);
CREATE INDEX IF NOT EXISTS idx_playlist_drama_drama ON drama_playlist_drama (drama_id);
COMMENT ON TABLE drama_playlist_drama IS '剧单与短剧的关联关系';

DROP TRIGGER IF EXISTS trg_drama_playlist_updated_at ON drama_playlist;
CREATE TRIGGER trg_drama_playlist_updated_at
  BEFORE UPDATE ON drama_playlist
  FOR EACH ROW EXECUTE FUNCTION set_updated_at();