import { afterEach, expect, test, vi } from "vitest";

import { POST } from "../../../app/api/orders/route";

afterEach(() => {
  vi.unstubAllEnvs();
  vi.unstubAllGlobals();
});

test("proxies order creation to the backend and returns normalized success data", async () => {
  vi.stubEnv("BACKEND_BASE_URL", "http://backend.test/api/v1");

  const fetchMock = vi.fn().mockResolvedValue(
    new Response(
      JSON.stringify({
        order_id: 77,
        workflow_id: "wf-77",
        status: "created",
      }),
      {
        status: 201,
        headers: {
          "content-type": "application/json",
        },
      },
    ),
  );

  vi.stubGlobal("fetch", fetchMock);

  const request = new Request("http://localhost/api/orders", {
    method: "POST",
    headers: {
      "content-type": "application/json",
    },
    body: JSON.stringify({
      customer_level: "mid",
      service_mode: "semi_pro",
      model_id: 101,
      garment_asset_id: 303,
      scene_ref_asset_id: 404,
    }),
  });

  const response = await POST(request);
  const payload = await response.json();

  expect(response.status).toBe(201);
  expect(payload).toEqual({
    mode: "proxy",
    data: {
      orderId: 77,
      workflowId: "wf-77",
      status: "created",
    },
  });
  expect(fetchMock).toHaveBeenCalledWith(
    "http://backend.test/api/v1/orders",
    expect.objectContaining({
      method: "POST",
    }),
  );
});

test("rejects invalid order creation payloads before proxying", async () => {
  const fetchMock = vi.fn();
  vi.stubGlobal("fetch", fetchMock);

  const request = new Request("http://localhost/api/orders", {
    method: "POST",
    headers: {
      "content-type": "application/json",
    },
    body: JSON.stringify({
      customer_level: "low",
      service_mode: "semi_pro",
      model_id: 101,
      garment_asset_id: 303,
      scene_ref_asset_id: 404,
    }),
  });

  const response = await POST(request);
  const payload = await response.json();

  expect(response.status).toBe(400);
  expect(payload).toMatchObject({
    error: "VALIDATION_ERROR",
  });
  expect(fetchMock).not.toHaveBeenCalled();
});

test("rejects malformed JSON before validation or proxying", async () => {
  const fetchMock = vi.fn();
  vi.stubGlobal("fetch", fetchMock);

  const request = new Request("http://localhost/api/orders", {
    method: "POST",
    headers: {
      "content-type": "application/json",
    },
    body: "{bad json",
  });

  const response = await POST(request);
  const payload = await response.json();

  expect(response.status).toBe(400);
  expect(payload).toEqual({
    error: "INVALID_JSON",
    message: "请求体必须是合法 JSON。",
  });
  expect(fetchMock).not.toHaveBeenCalled();
});

test("normalizes upstream validation errors from the backend", async () => {
  vi.stubEnv("BACKEND_BASE_URL", "http://backend.test/api/v1");

  const fetchMock = vi.fn().mockResolvedValue(
    new Response(
      JSON.stringify({
        detail: "scene_ref_asset_id is invalid",
      }),
      {
        status: 422,
        headers: {
          "content-type": "application/json",
        },
      },
    ),
  );

  vi.stubGlobal("fetch", fetchMock);

  const request = new Request("http://localhost/api/orders", {
    method: "POST",
    headers: {
      "content-type": "application/json",
    },
    body: JSON.stringify({
      customer_level: "mid",
      service_mode: "semi_pro",
      model_id: 101,
      garment_asset_id: 303,
      scene_ref_asset_id: 404,
    }),
  });

  const response = await POST(request);
  const payload = await response.json();

  expect(response.status).toBe(400);
  expect(payload).toEqual({
    error: "VALIDATION_ERROR",
    message: "scene_ref_asset_id is invalid",
    details: {
      detail: "scene_ref_asset_id is invalid",
    },
  });
});

test("accepts order creation payloads without a scene asset id", async () => {
  vi.stubEnv("BACKEND_BASE_URL", "http://backend.test/api/v1");

  const fetchMock = vi.fn().mockResolvedValue(
    new Response(
      JSON.stringify({
        order_id: 88,
        workflow_id: "wf-88",
        status: "created",
      }),
      {
        status: 201,
        headers: {
          "content-type": "application/json",
        },
      },
    ),
  );

  vi.stubGlobal("fetch", fetchMock);

  const request = new Request("http://localhost/api/orders", {
    method: "POST",
    headers: {
      "content-type": "application/json",
    },
    body: JSON.stringify({
      customer_level: "low",
      service_mode: "auto_basic",
      model_id: 101,
      garment_asset_id: 303,
    }),
  });

  const response = await POST(request);
  const payload = await response.json();

  expect(response.status).toBe(201);
  expect(payload).toEqual({
    mode: "proxy",
    data: {
      orderId: 88,
      workflowId: "wf-88",
      status: "created",
    },
  });
  expect(fetchMock).toHaveBeenCalledWith(
    "http://backend.test/api/v1/orders",
    expect.objectContaining({
      method: "POST",
      body: JSON.stringify({
        customer_level: "low",
        service_mode: "auto_basic",
        model_id: 101,
        garment_asset_id: 303,
      }),
    }),
  );
});