CREATE TABLE "user_oauth_accounts" (
  "id" UUID NOT NULL DEFAULT gen_random_uuid(),
  "user_id" UUID NOT NULL,
  "provider" TEXT NOT NULL,
  "provider_user_id" TEXT NOT NULL,
  "email" TEXT,
  "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "updated_at" TIMESTAMPTZ(3) NOT NULL,
  CONSTRAINT "user_oauth_accounts_pkey" PRIMARY KEY ("id")
);

CREATE UNIQUE INDEX "user_oauth_accounts_provider_provider_user_id_key"
  ON "user_oauth_accounts"("provider", "provider_user_id");

CREATE INDEX "user_oauth_accounts_user_id_idx" ON "user_oauth_accounts"("user_id");

ALTER TABLE "user_oauth_accounts"
  ADD CONSTRAINT "user_oauth_accounts_user_id_fkey"
  FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;

COMMENT ON TABLE "user_oauth_accounts" IS '중앙 사용자와 외부 OAuth 제공자 계정을 매핑한다';
COMMENT ON COLUMN "user_oauth_accounts"."id" IS 'OAuth 계정 매핑 고유 ID';
COMMENT ON COLUMN "user_oauth_accounts"."user_id" IS '연결된 중앙 사용자 ID';
COMMENT ON COLUMN "user_oauth_accounts"."provider" IS 'OAuth 제공자 코드. 예: google';
COMMENT ON COLUMN "user_oauth_accounts"."provider_user_id" IS 'OAuth 제공자가 발급한 사용자 고유 ID';
COMMENT ON COLUMN "user_oauth_accounts"."email" IS 'OAuth 제공자에서 받은 이메일';
COMMENT ON COLUMN "user_oauth_accounts"."created_at" IS '매핑 생성 시각';
COMMENT ON COLUMN "user_oauth_accounts"."updated_at" IS '매핑 수정 시각';