const {
  IntegrationDispatchError,
  dispatchOutboxEvent,
} = require("../../src/services/integrations/dispatcher");

describe("dispatchOutboxEvent", () => {
  const originalFetch = global.fetch;

  afterEach(() => {
    global.fetch = originalFetch;
    vi.restoreAllMocks();
  });

  it("handles mock ERP success", async () => {
    const result = await dispatchOutboxEvent({
      config: {
        erpSyncEnabled: true,
        erpSyncProvider: "mock",
      },
      eventType: "erp.reimbursement.paid",
      payload: {
        reimbursementId: "rb-1",
        formNumber: "BX-001",
      },
    });

    expect(result.channel).toBe("erp");
    expect(result.code).toBe("mock_synced");
    expect(result.response.externalId).toContain("BX-001");
  });

  it("loads IM channel and dispatches mock wecom message", async () => {
    const prisma = {
      notificationChannel: {
        findUnique: vi.fn().mockResolvedValue({
          id: "channel-1",
          channel_type: "wecom",
          name: "采购经理群",
          enabled: true,
          config_json: {
            mode: "mock",
            routing: {},
          },
          template_json: {
            title: "{{title}}",
            body: "{{body}}",
            footer: "来自海音达工作台",
            deepLinkLabel: "查看详情",
          },
        }),
      },
    };

    const result = await dispatchOutboxEvent({
      prisma,
      config: {
        imNotifierEnabled: true,
      },
      eventType: "notification.im",
      payload: {
        channelId: "channel-1",
        channelType: "wecom",
        notificationType: "workflow.task_assigned",
        title: "【待办】采购申请待审批",
        body: "采购申请已流转到你，请及时处理。",
      },
    });

    expect(prisma.notificationChannel.findUnique).toHaveBeenCalledWith({
      where: { id: "channel-1" },
      select: {
        id: true,
        channel_type: true,
        name: true,
        enabled: true,
        config_json: true,
        template_json: true,
      },
    });
    expect(result.channel).toBe("im");
    expect(result.code).toBe("mock_sent");
    expect(result.previewMessage).toContain("采购申请待审批");
  });

  it("safely skips missing IM channel", async () => {
    const result = await dispatchOutboxEvent({
      prisma: {
        notificationChannel: {
          findUnique: vi.fn().mockResolvedValue(null),
        },
      },
      config: {
        imNotifierEnabled: true,
      },
      eventType: "notification.im",
      payload: {
        channelId: "missing-channel",
        channelType: "wecom",
      },
    });

    expect(result.channel).toBe("im");
    expect(result.code).toBe("channel_not_found");
    expect(result.skipped).toBe(true);
  });

  it("safely skips disabled IM channel", async () => {
    const result = await dispatchOutboxEvent({
      prisma: {
        notificationChannel: {
          findUnique: vi.fn().mockResolvedValue({
            id: "channel-2",
            channel_type: "wecom",
            name: "disabled",
            enabled: false,
            config_json: { mode: "mock", routing: {} },
            template_json: null,
          }),
        },
      },
      config: {
        imNotifierEnabled: true,
      },
      eventType: "notification.im",
      payload: {
        channelId: "channel-2",
        channelType: "wecom",
      },
    });

    expect(result.code).toBe("channel_disabled");
    expect(result.skipped).toBe(true);
  });

  it("maps wecom 4xx as non-retryable IM dispatch error", async () => {
    global.fetch = vi.fn().mockResolvedValue({
      ok: false,
      status: 400,
      json: vi.fn().mockResolvedValue({ errcode: 40013, errmsg: "bad request" }),
    });

    await expect(
      dispatchOutboxEvent({
        prisma: {
          notificationChannel: {
            findUnique: vi.fn().mockResolvedValue({
              id: "channel-3",
              channel_type: "wecom",
              name: "wecom-4xx",
              enabled: true,
              config_json: {
                mode: "wecom_webhook",
                webhookUrl: "https://example.com/wecom",
                timeoutMs: 500,
                routing: {},
              },
              template_json: null,
            }),
          },
        },
        config: {
          imNotifierEnabled: true,
        },
        eventType: "notification.im",
        payload: {
          channelId: "channel-3",
          channelType: "wecom",
          title: "test",
          body: "body",
        },
      }),
    ).rejects.toMatchObject({
      name: "IntegrationDispatchError",
      code: "wecom_http_4xx",
      retryable: false,
    });
  });

  it("maps wecom 5xx as retryable IM dispatch error", async () => {
    global.fetch = vi.fn().mockResolvedValue({
      ok: false,
      status: 503,
      json: vi.fn().mockResolvedValue({ errcode: 500, errmsg: "server error" }),
    });

    await expect(
      dispatchOutboxEvent({
        prisma: {
          notificationChannel: {
            findUnique: vi.fn().mockResolvedValue({
              id: "channel-4",
              channel_type: "wecom",
              name: "wecom-5xx",
              enabled: true,
              config_json: {
                mode: "wecom_webhook",
                webhookUrl: "https://example.com/wecom",
                timeoutMs: 500,
                routing: {},
              },
              template_json: null,
            }),
          },
        },
        config: {
          imNotifierEnabled: true,
        },
        eventType: "notification.im",
        payload: {
          channelId: "channel-4",
          channelType: "wecom",
          title: "test",
          body: "body",
        },
      }),
    ).rejects.toMatchObject({
      name: "IntegrationDispatchError",
      code: "wecom_http_5xx",
      retryable: true,
    });
  });

  it("maps wecom timeout as retryable IM dispatch error", async () => {
    global.fetch = vi.fn().mockRejectedValue({ name: "AbortError" });

    await expect(
      dispatchOutboxEvent({
        prisma: {
          notificationChannel: {
            findUnique: vi.fn().mockResolvedValue({
              id: "channel-5",
              channel_type: "wecom",
              name: "wecom-timeout",
              enabled: true,
              config_json: {
                mode: "wecom_webhook",
                webhookUrl: "https://example.com/wecom",
                timeoutMs: 500,
                routing: {},
              },
              template_json: null,
            }),
          },
        },
        config: {
          imNotifierEnabled: true,
        },
        eventType: "notification.im",
        payload: {
          channelId: "channel-5",
          channelType: "wecom",
          title: "test",
          body: "body",
        },
      }),
    ).rejects.toMatchObject({
      name: "IntegrationDispatchError",
      code: "wecom_timeout",
      retryable: true,
    });
  });

  it("throws non-retryable error for unsupported event", async () => {
    await expect(
      dispatchOutboxEvent({
        config: { erpSyncEnabled: true, erpSyncProvider: "mock" },
        eventType: "unsupported.event",
        payload: {},
      }),
    ).rejects.toMatchObject({
      name: "IntegrationDispatchError",
      code: "unsupported_outbox_event",
      retryable: false,
    });
  });

  it("preserves error class semantics", () => {
    const error = new IntegrationDispatchError({
      code: "unit_test",
      message: "unit test",
      retryable: true,
      statusCode: 503,
    });

    expect(error).toBeInstanceOf(Error);
    expect(error.code).toBe("unit_test");
    expect(error.retryable).toBe(true);
    expect(error.statusCode).toBe(503);
  });
});