-- W2-2 심사위원 역할 권한(잼 스코프). 멱등. db/apply-local-ddl.sh 로 실행 DB 비파괴 적용.
-- 선행: docs/jam-ddl.sql(jams — 알파벳 글롭 순 jam-ddl 먼저 적용).
-- 전역 user_permissions(RBAC) 변경 없음 — 잼 회차별 역할은 잼 스코프 조인이 정석.
-- 추가만, 파괴 없음.

-- ===========================================================================
-- 1) jam_judges (잼별 심사위원. 잼 스코프 역할. 전역 권한과 별도 축)
-- ===========================================================================
CREATE SEQUENCE IF NOT EXISTS "jam_judges_id_seq";
CREATE TABLE IF NOT EXISTS "jam_judges" (
    "id"          bigint DEFAULT nextval('jam_judges_id_seq'::regclass) NOT NULL,
    "jam_id"      bigint NOT NULL,                          -- 잼 회차(FK jams)
    "user_id"     bigint NOT NULL,                          -- 심사위원(FK users; 누구나 가능)
    "assigned_by" bigint,                                   -- 지정 관리자(FK users; 감사 보조, nullable)
    "created_at"  timestamp with time zone DEFAULT now() NOT NULL,
    PRIMARY KEY ("id")
);
ALTER SEQUENCE "jam_judges_id_seq" OWNED BY "jam_judges"."id";
DO $$
BEGIN
    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'jam_judges_jam_fkey') THEN
        ALTER TABLE "jam_judges" ADD CONSTRAINT "jam_judges_jam_fkey"
            FOREIGN KEY ("jam_id") REFERENCES "jams" ("id");
    END IF;
    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'jam_judges_user_fkey') THEN
        ALTER TABLE "jam_judges" ADD CONSTRAINT "jam_judges_user_fkey"
            FOREIGN KEY ("user_id") REFERENCES "users" ("id");
    END IF;
    IF NOT EXISTS (SELECT 1 FROM pg_constraint WHERE conname = 'jam_judges_assigned_by_fkey') THEN
        ALTER TABLE "jam_judges" ADD CONSTRAINT "jam_judges_assigned_by_fkey"
            FOREIGN KEY ("assigned_by") REFERENCES "users" ("id");
    END IF;
END
$$;
-- 같은 잼에 같은 유저 중복 지정 방지(멱등 지정). 잼 종료 후 잔존(J5) — soft delete 없음(이력=행 존재).
-- 해제는 hard DELETE(역할 회수). 재지정은 다시 INSERT.
CREATE UNIQUE INDEX IF NOT EXISTS "ux_jam_judges_jam_user"
    ON "jam_judges" ("jam_id", "user_id");
CREATE INDEX IF NOT EXISTS "idx_jam_judges_jam"
    ON "jam_judges" ("jam_id");