CREATE TABLE "course_week_references" (
  "id" UUID NOT NULL DEFAULT gen_random_uuid(),
  "week_id" UUID NOT NULL,
  "title" TEXT NOT NULL,
  "original_file_name" TEXT NOT NULL,
  "stored_file_name" TEXT NOT NULL,
  "content_type" TEXT,
  "file_size_bytes" INTEGER NOT NULL DEFAULT 0,
  "sort_order" INTEGER NOT NULL DEFAULT 0,
  "created_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  "updated_at" TIMESTAMPTZ(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

  CONSTRAINT "course_week_references_pkey" PRIMARY KEY ("id")
);

CREATE INDEX "course_week_references_week_id_idx" ON "course_week_references"("week_id");
CREATE UNIQUE INDEX "course_week_references_week_id_stored_file_name_key" ON "course_week_references"("week_id", "stored_file_name");

ALTER TABLE "course_week_references"
ADD CONSTRAINT "course_week_references_week_id_fkey"
FOREIGN KEY ("week_id") REFERENCES "course_weeks"("id") ON DELETE CASCADE ON UPDATE CASCADE;