ALTER TABLE "payment_batch_receipt_attachments" ADD COLUMN "receipt_ocr_version" INTEGER NOT NULL DEFAULT 0;
ALTER TABLE "payment_batch_receipt_attachments"
  ADD COLUMN "receipt_ocr_state" VARCHAR(32) NOT NULL DEFAULT 'legacy',
  ADD COLUMN "receipt_ocr_started_at" TIMESTAMP(3);

CREATE TABLE "payment_receipt_verifications" (
  "id" UUID NOT NULL,
  "attachment_id" UUID NOT NULL,
  "source_sha256" VARCHAR(64) NOT NULL,
  "source_version" INTEGER NOT NULL,
  "status" VARCHAR(32) NOT NULL,
  "pages_expected" INTEGER NOT NULL,
  "pages_processed" INTEGER NOT NULL,
  "normalized_encrypted" TEXT NOT NULL,
  "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT "payment_receipt_verifications_pkey" PRIMARY KEY ("id"),
  CONSTRAINT "payment_receipt_verifications_pages_check" CHECK (
    pages_expected >= 0 AND pages_processed BETWEEN 0 AND pages_expected
  ),
  CONSTRAINT "payment_receipt_verifications_attachment_id_fkey" FOREIGN KEY ("attachment_id")
    REFERENCES "payment_batch_receipt_attachments"("id") ON DELETE RESTRICT ON UPDATE CASCADE
);
CREATE INDEX "payment_receipt_verifications_attachment_id_created_at_idx"
  ON "payment_receipt_verifications"("attachment_id", "created_at");

CREATE TABLE "payment_receipt_matches" (
  "id" UUID NOT NULL,
  "verification_id" UUID NOT NULL,
  "item_id" UUID NOT NULL,
  "page_number" INTEGER NOT NULL CHECK (page_number BETWEEN 1 AND 20),
  "fingerprint" VARCHAR(64) NOT NULL,
  "key_id" VARCHAR(64) NOT NULL,
  CONSTRAINT "payment_receipt_matches_pkey" PRIMARY KEY ("id"),
  CONSTRAINT "payment_receipt_matches_verification_id_fkey" FOREIGN KEY ("verification_id")
    REFERENCES "payment_receipt_verifications"("id") ON DELETE RESTRICT ON UPDATE CASCADE,
  CONSTRAINT "payment_receipt_matches_item_id_fkey" FOREIGN KEY ("item_id")
    REFERENCES "payment_batch_items"("id") ON DELETE RESTRICT ON UPDATE CASCADE
);
CREATE UNIQUE INDEX "payment_receipt_matches_verification_id_page_number_key"
  ON "payment_receipt_matches"("verification_id", "page_number");
CREATE UNIQUE INDEX "payment_receipt_matches_verification_id_item_id_key"
  ON "payment_receipt_matches"("verification_id", "item_id");
CREATE INDEX "payment_receipt_matches_item_id_idx" ON "payment_receipt_matches"("item_id");

CREATE TABLE "payment_receipt_claims" (
  "fingerprint" VARCHAR(64) NOT NULL,
  "key_id" VARCHAR(64) NOT NULL,
  "item_id" UUID NOT NULL,
  "verification_id" UUID NOT NULL,
  "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  CONSTRAINT "payment_receipt_claims_pkey" PRIMARY KEY ("fingerprint"),
  CONSTRAINT "payment_receipt_claims_item_id_fkey" FOREIGN KEY ("item_id")
    REFERENCES "payment_batch_items"("id") ON DELETE RESTRICT ON UPDATE CASCADE,
  CONSTRAINT "payment_receipt_claims_verification_id_fkey" FOREIGN KEY ("verification_id")
    REFERENCES "payment_receipt_verifications"("id") ON DELETE RESTRICT ON UPDATE CASCADE
);
CREATE UNIQUE INDEX "payment_receipt_claims_item_id_key" ON "payment_receipt_claims"("item_id");