-- CASHV: 付款批次银行回单附件。用于记录网银/银行侧付款完成后的回单证据，不接真实支付接口。
CREATE TABLE "payment_batch_receipt_attachments" (
    "id" UUID NOT NULL,
    "payment_batch_id" UUID NOT NULL,
    "storage_path" TEXT NOT NULL,
    "original_name" TEXT NOT NULL,
    "mime_type" TEXT NOT NULL,
    "file_size" INTEGER NOT NULL,
    "file_sha256" TEXT NOT NULL,
    "uploaded_by" UUID NOT NULL,
    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,

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

CREATE INDEX "idx_payment_batch_receipts_batch_created"
    ON "payment_batch_receipt_attachments"("payment_batch_id", "created_at");

CREATE INDEX "idx_payment_batch_receipts_uploader"
    ON "payment_batch_receipt_attachments"("uploaded_by");

CREATE INDEX "idx_payment_batch_receipts_file_sha256"
    ON "payment_batch_receipt_attachments"("file_sha256");

ALTER TABLE "payment_batch_receipt_attachments"
    ADD CONSTRAINT "payment_batch_receipt_attachments_payment_batch_id_fkey"
    FOREIGN KEY ("payment_batch_id") REFERENCES "payment_batches"("id")
    ON DELETE CASCADE ON UPDATE CASCADE;

ALTER TABLE "payment_batch_receipt_attachments"
    ADD CONSTRAINT "payment_batch_receipt_attachments_uploaded_by_fkey"
    FOREIGN KEY ("uploaded_by") REFERENCES "employees"("id")
    ON DELETE RESTRICT ON UPDATE CASCADE;