-- CreateEnum
CREATE TYPE "ApprovableModelEnum" AS ENUM ('SKILL', 'PARENT');

-- CreateTable
CREATE TABLE "approvals" (
    "id" BIGSERIAL NOT NULL,
    "entity_type" "ApprovableModelEnum" NOT NULL,
    "entity_id" BIGINT NOT NULL,
    "status" "ApprovalStatusEnum" NOT NULL DEFAULT 'PENDING',
    "reviewed_by" BIGINT,
    "reviewed_at" TIMESTAMP(3),
    "reason" VARCHAR(500),
    "is_active" BOOLEAN NOT NULL DEFAULT true,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
    "updated_at" TIMESTAMP(3) NOT NULL,
    "deactivated_at" TIMESTAMP(3),
    "deactivated_by_id" BIGINT,

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

-- CreateIndex
CREATE INDEX "approvals_entity_type_entity_id_idx" ON "approvals"("entity_type", "entity_id");

-- AddForeignKey
ALTER TABLE "approvals" ADD CONSTRAINT "approvals_reviewed_by_fkey" FOREIGN KEY ("reviewed_by") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;

-- AddForeignKey
ALTER TABLE "approvals" ADD CONSTRAINT "approvals_deactivated_by_id_fkey" FOREIGN KEY ("deactivated_by_id") REFERENCES "users"("id") ON DELETE RESTRICT ON UPDATE CASCADE;