-- CreateTable: PriceHistory (listing price change tracking)
CREATE TABLE "PriceHistory" (
    "id" TEXT NOT NULL,
    "listingId" TEXT NOT NULL,
    "oldPrice" BIGINT NOT NULL,
    "newPrice" BIGINT NOT NULL,
    "changedAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

-- CreateIndex
CREATE INDEX "PriceHistory_listingId_changedAt_idx" ON "PriceHistory"("listingId", "changedAt" DESC);

-- AddForeignKey
ALTER TABLE "PriceHistory" ADD CONSTRAINT "PriceHistory_listingId_fkey" FOREIGN KEY ("listingId") REFERENCES "Listing"("id") ON DELETE CASCADE ON UPDATE CASCADE;