const path = require("node:path");
const { pathToFileURL } = require("node:url");
const { spawnSync } = require("node:child_process");

const ROOT_DIR = path.resolve(__dirname, "../../../..");
const SCRIPT_PATH = path.join(ROOT_DIR, "scripts/qa/check-ocr-provider-samples.mjs");
const OCR_PDF_MAX_BYTES = 7 * 1024 * 1024;

function syntheticPdf(body = "synthetic") {
  return Buffer.from(`%PDF-1.7\n${body}\n%%EOF\n`, "ascii");
}

function providerConfig() {
  return {
    ocrProvider: "tencent",
    tencentSecretId: "synthetic-id",
    tencentSecretKey: "synthetic-key",
    tencentOcrRegion: "ap-beijing",
    ocrTimeoutMs: 5000,
  };
}

function normalizedResult(overrides = {}) {
  return {
    documentSubtype: "VatElectronicCommonInvoice",
    documentCategory: "vat_invoice",
    documentCount: 1,
    invoiceCode: "synthetic-code",
    invoiceNumber: "synthetic-number",
    invoiceDate: "2026-01-01",
    amount: "1.00",
    taxAmount: "0.01",
    totalAmount: "1.01",
    sellerName: "synthetic-seller",
    buyerName: "synthetic-buyer",
    transportMode: "pdf_native",
    ...overrides,
  };
}

describe("check-ocr-provider-samples", () => {
  let liveRunner;

  beforeAll(async () => {
    liveRunner = await import(pathToFileURL(SCRIPT_PATH).href);
  });

  it.each([
    ["vat_invoice", normalizedResult()],
    [
      "full_vat_invoice",
      normalizedResult({
        documentSubtype: "VatElectronicInvoiceFull",
        documentCategory: "full_vat_invoice",
        invoiceCode: null,
      }),
    ],
    [
      "electronic_train_ticket",
      normalizedResult({
        documentSubtype: "ElectronicTrainTicketFull",
        documentCategory: "electronic_train_ticket",
        invoiceCode: null,
        sellerName: null,
      }),
    ],
  ])("accepts category-aware required fields for %s", async (_category, result) => {
    const runOcr = vi.fn().mockResolvedValue(result);

    const summary = await liveRunner.runLiveSampleCheck({
      alias: "SAMPLE-PDF-TEST",
      buffer: syntheticPdf(),
      config: providerConfig(),
      runOcr,
      now: vi.fn().mockReturnValueOnce(100).mockReturnValueOnce(125),
    });

    expect(summary.status).toBe("PASS");
    expect(summary.elapsedMs).toBe(25);
    expect(summary.documentCategory).toBe(result.documentCategory);
    expect(summary.missingRequiredFields).toEqual([]);
    expect(runOcr).toHaveBeenCalledTimes(1);
    expect(runOcr.mock.calls[0][0]).toMatchObject({
      ocrType: "vat",
      sourceMimeType: "application/pdf",
    });
  });

  it("holds a railway ticket when its buyer field is missing", async () => {
    const summary = await liveRunner.runLiveSampleCheck({
      alias: "SAMPLE-PDF-TRAIN",
      buffer: syntheticPdf(),
      config: providerConfig(),
      runOcr: vi.fn().mockResolvedValue(
        normalizedResult({
          documentSubtype: "ElectronicTrainTicketFull",
          documentCategory: "electronic_train_ticket",
          invoiceCode: null,
          sellerName: null,
          buyerName: null,
        }),
      ),
    });

    expect(summary.status).toBe("HOLD");
    expect(summary.missingRequiredFields).toEqual(["buyerName"]);
  });

  it("never exposes provider raw fields or normalized business values", async () => {
    const summary = await liveRunner.runLiveSampleCheck({
      alias: "SAMPLE-PDF-PRIVACY",
      buffer: syntheticPdf(),
      config: providerConfig(),
      runOcr: vi.fn().mockResolvedValue(
        normalizedResult({
          raw: {
            passengerIdentity: "forbidden-identity-marker",
            response: "forbidden-response-marker",
          },
        }),
      ),
    });
    const serialized = JSON.stringify(summary);

    expect(serialized).not.toContain("forbidden-identity-marker");
    expect(serialized).not.toContain("forbidden-response-marker");
    expect(serialized).not.toContain("synthetic-number");
    expect(serialized).not.toContain("synthetic-seller");
    expect(summary.fieldHits.invoiceNumber).toBe(true);
    expect(summary.fieldHits.sellerName).toBe(true);
  });

  it.each([
    ["non-pdf", Buffer.from("not a pdf", "ascii"), "sample_pdf_invalid"],
    ["truncated", Buffer.from("%PDF-1.7\nmissing eof", "ascii"), "sample_pdf_invalid"],
    ["oversized", Buffer.alloc(OCR_PDF_MAX_BYTES + 1, 0x20), "sample_too_large"],
  ])("rejects %s before provider invocation", async (_caseName, buffer, errorCode) => {
    const runOcr = vi.fn();

    await expect(
      liveRunner.runLiveSampleCheck({
        alias: "SAMPLE-PDF-TEST",
        buffer,
        config: providerConfig(),
        runOcr,
      }),
    ).rejects.toMatchObject({ code: errorCode });
    expect(runOcr).not.toHaveBeenCalled();
  });

  it("consumes one stdin PDF and returns only a safe config error without credentials", () => {
    const result = spawnSync(process.execPath, [SCRIPT_PATH, "--alias=SAMPLE-PDF-STDIN"], {
      cwd: ROOT_DIR,
      env: {
        ...process.env,
        TENCENT_SECRET_ID: "",
        TENCENT_SECRET_KEY: "",
      },
      input: syntheticPdf(),
      encoding: "utf8",
    });
    const summary = JSON.parse(result.stdout.trim());

    expect(result.status).toBe(1);
    expect(result.stderr).toBe("");
    expect(summary).toEqual({
      alias: "SAMPLE-PDF-STDIN",
      provider: "tencent",
      status: "HOLD",
      transportMode: "pdf_native",
      errorCode: "ocr_credentials_missing",
    });
  });
});