-- R111: 报销附件材料。用于支付截图、合同、订单、说明等非发票材料，不参与发票 OCR/查重。
CREATE TABLE "reimbursement_attachments" (
    "id" UUID NOT NULL,
    "reimbursement_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 "reimbursement_attachments_pkey" PRIMARY KEY ("id")
);

CREATE INDEX "idx_reimbursement_attachments_form_created"
    ON "reimbursement_attachments"("reimbursement_id", "created_at");

CREATE INDEX "idx_reimbursement_attachments_uploader"
    ON "reimbursement_attachments"("uploaded_by");

CREATE INDEX "idx_reimbursement_attachments_file_sha256"
    ON "reimbursement_attachments"("file_sha256");

ALTER TABLE "reimbursement_attachments"
    ADD CONSTRAINT "reimbursement_attachments_reimbursement_id_fkey"
    FOREIGN KEY ("reimbursement_id") REFERENCES "reimbursement_forms"("id")
    ON DELETE CASCADE ON UPDATE CASCADE;

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