import { afterEach, describe, expect, it, vi } from "vitest";

const { createGoogleGenAIMock, downloadMock, generateVideosMock, getVideosOperationMock } =
  vi.hoisted(() => {
    const generateVideosMock = vi.fn();
    const getVideosOperationMock = vi.fn();
    const downloadMock = vi.fn();
    const createGoogleGenAIMock = vi.fn(() => {
      return {
        models: {
          generateVideos: generateVideosMock,
        },
        operations: {
          getVideosOperation: getVideosOperationMock,
        },
        files: {
          download: downloadMock,
        },
      };
    });
    return { createGoogleGenAIMock, downloadMock, generateVideosMock, getVideosOperationMock };
  });

vi.mock("./google-genai-runtime.js", () => ({
  createGoogleGenAI: createGoogleGenAIMock,
}));

import * as providerAuthRuntime from "openclaw/plugin-sdk/provider-auth-runtime";
import { expectExplicitVideoGenerationCapabilities } from "openclaw/plugin-sdk/provider-test-contracts";
import { buildGoogleVideoGenerationProvider } from "./video-generation-provider.js";

describe("google video generation provider", () => {
  afterEach(() => {
    vi.restoreAllMocks();
    vi.unstubAllGlobals();
    downloadMock.mockReset();
    generateVideosMock.mockReset();
    getVideosOperationMock.mockReset();
    createGoogleGenAIMock.mockClear();
  });

  it("declares explicit mode capabilities", () => {
    expectExplicitVideoGenerationCapabilities(buildGoogleVideoGenerationProvider());
  });

  it("submits generation and returns inline video bytes", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockResolvedValue({
      done: true,
      name: "operations/123",
      response: {
        generatedVideos: [
          {
            video: {
              videoBytes: Buffer.from("mp4-bytes").toString("base64"),
              mimeType: "video/mp4",
            },
          },
        ],
      },
    });

    const provider = buildGoogleVideoGenerationProvider();
    const result = await provider.generateVideo({
      provider: "google",
      model: "veo-3.1-fast-generate-preview",
      prompt: "A tiny robot watering a windowsill garden",
      cfg: {},
      aspectRatio: "16:9",
      resolution: "720P",
      durationSeconds: 3,
      audio: true,
    });

    expect(generateVideosMock).toHaveBeenCalledTimes(1);
    const [request] = generateVideosMock.mock.calls[0] ?? [];
    expect(request).toEqual(
      expect.objectContaining({
        model: "veo-3.1-fast-generate-preview",
        prompt: "A tiny robot watering a windowsill garden",
        config: expect.objectContaining({
          durationSeconds: 4,
          aspectRatio: "16:9",
          resolution: "720p",
        }),
      }),
    );
    expect(request?.config).not.toHaveProperty("numberOfVideos");
    expect(request?.config).not.toHaveProperty("generateAudio");
    expect(result.videos).toHaveLength(1);
    expect(result.videos[0]?.mimeType).toBe("video/mp4");
    expect(createGoogleGenAIMock).toHaveBeenCalledWith(
      expect.objectContaining({
        apiKey: "google-key",
        httpOptions: expect.not.objectContaining({
          baseUrl: expect.anything(),
          apiVersion: expect.anything(),
        }),
      }),
    );
  });

  it("strips /v1beta suffix from configured baseUrl before passing to GoogleGenAI SDK", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockResolvedValue({
      done: true,
      response: {
        generatedVideos: [
          { video: { videoBytes: Buffer.from("mp4").toString("base64"), mimeType: "video/mp4" } },
        ],
      },
    });

    const provider = buildGoogleVideoGenerationProvider();
    await provider.generateVideo({
      provider: "google",
      model: "veo-3.1-fast-generate-preview",
      prompt: "A tiny robot watering a windowsill garden",
      cfg: {
        models: {
          providers: {
            google: { baseUrl: "https://generativelanguage.googleapis.com/v1beta", models: [] },
          },
        },
      },
      durationSeconds: 3,
    });

    expect(createGoogleGenAIMock).toHaveBeenCalledWith(
      expect.objectContaining({
        httpOptions: expect.objectContaining({
          baseUrl: "https://generativelanguage.googleapis.com",
        }),
      }),
    );
  });

  it("downloads MLDev direct video uri responses without routing through the Files API", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockResolvedValue({
      done: true,
      response: {
        generatedVideos: [
          {
            video: {
              uri: "https://generativelanguage.googleapis.com/v1beta/files/generated-video:download?alt=media",
              mimeType: "video/mp4",
            },
          },
        ],
      },
    });
    const fetchMock = vi.fn(async () => {
      return new Response("direct-mp4", {
        status: 200,
        statusText: "OK",
        headers: { "content-type": "video/mp4" },
      });
    });
    vi.stubGlobal("fetch", fetchMock);

    const provider = buildGoogleVideoGenerationProvider();
    const result = await provider.generateVideo({
      provider: "google",
      model: "veo-3.1-fast-generate-preview",
      prompt: "A tiny robot watering a windowsill garden",
      cfg: {},
      durationSeconds: 3,
    });

    expect(fetchMock).toHaveBeenCalledTimes(1);
    const [[downloadUrl]] = fetchMock.mock.calls as unknown as [[string, RequestInit?]];
    expect(downloadUrl).toBe(
      "https://generativelanguage.googleapis.com/v1beta/files/generated-video:download?alt=media&key=google-key",
    );
    expect(downloadMock).not.toHaveBeenCalled();
    expect(result.videos[0]?.buffer).toEqual(Buffer.from("direct-mp4"));
    expect(result.videos[0]?.mimeType).toBe("video/mp4");
  });

  it("falls back to REST predictLongRunning when text-only SDK video generation returns 404", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockRejectedValue(Object.assign(new Error("sdk 404"), { status: 404 }));
    const fetchMock = vi
      .fn()
      .mockResolvedValueOnce(
        new Response(
          JSON.stringify({
            done: true,
            name: "operations/rest-123",
            response: {
              generateVideoResponse: {
                generatedSamples: [
                  {
                    video: {
                      uri: "https://generativelanguage.googleapis.com/v1beta/files/rest-video:download?alt=media",
                      mimeType: "video/mp4",
                    },
                  },
                ],
              },
            },
          }),
        ),
      )
      .mockResolvedValueOnce(
        new Response("rest-video", {
          status: 200,
          statusText: "OK",
          headers: { "content-type": "video/mp4" },
        }),
      );
    vi.stubGlobal("fetch", fetchMock);

    const provider = buildGoogleVideoGenerationProvider();
    const result = await provider.generateVideo({
      provider: "google",
      model: "google/models/veo-3.1-fast-generate-preview",
      prompt: "A tiny robot watering a windowsill garden",
      cfg: {},
      durationSeconds: 3,
    });

    expect(fetchMock).toHaveBeenCalledTimes(2);
    expect(String(fetchMock.mock.calls[0]?.[0])).toBe(
      "https://generativelanguage.googleapis.com/v1beta/models/veo-3.1-fast-generate-preview:predictLongRunning",
    );
    expect(JSON.parse(String(fetchMock.mock.calls[0]?.[1]?.body))).toEqual({
      instances: [{ prompt: "A tiny robot watering a windowsill garden" }],
      parameters: { durationSeconds: 4 },
    });
    expect(String(fetchMock.mock.calls[1]?.[0])).toBe(
      "https://generativelanguage.googleapis.com/v1beta/files/rest-video:download?alt=media&key=google-key",
    );
    expect(downloadMock).not.toHaveBeenCalled();
    expect(result.videos[0]?.buffer).toEqual(Buffer.from("rest-video"));
  });

  it("does not fall back to REST when SDK video generation with reference inputs returns 404", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockRejectedValue(Object.assign(new Error("sdk 404"), { status: 404 }));
    const fetchMock = vi.fn();
    vi.stubGlobal("fetch", fetchMock);

    const provider = buildGoogleVideoGenerationProvider();
    await expect(
      provider.generateVideo({
        provider: "google",
        model: "veo-3.1-fast-generate-preview",
        prompt: "Animate this sketch",
        cfg: {},
        inputImages: [{ buffer: Buffer.from("img"), mimeType: "image/png" }],
      }),
    ).rejects.toThrow("sdk 404");

    expect(fetchMock).not.toHaveBeenCalled();
  });

  it("does NOT strip /v1beta when it appears mid-path (end-anchor proof)", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockResolvedValue({
      done: true,
      response: {
        generatedVideos: [
          { video: { videoBytes: Buffer.from("mp4").toString("base64"), mimeType: "video/mp4" } },
        ],
      },
    });

    const provider = buildGoogleVideoGenerationProvider();
    await provider.generateVideo({
      provider: "google",
      model: "veo-3.1-fast-generate-preview",
      prompt: "test",
      cfg: {
        models: {
          providers: { google: { baseUrl: "https://proxy.example.com/v1beta/route", models: [] } },
        },
      },
      durationSeconds: 3,
    });

    expect(createGoogleGenAIMock).toHaveBeenCalledWith(
      expect.objectContaining({
        httpOptions: expect.objectContaining({
          baseUrl: "https://proxy.example.com/v1beta/route",
        }),
      }),
    );
  });

  it("passes baseUrl unchanged when no /v1beta suffix is present", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockResolvedValue({
      done: true,
      response: {
        generatedVideos: [
          { video: { videoBytes: Buffer.from("mp4").toString("base64"), mimeType: "video/mp4" } },
        ],
      },
    });

    const provider = buildGoogleVideoGenerationProvider();
    await provider.generateVideo({
      provider: "google",
      model: "veo-3.1-fast-generate-preview",
      prompt: "test",
      cfg: {
        models: {
          providers: {
            google: { baseUrl: "https://generativelanguage.googleapis.com", models: [] },
          },
        },
      },
      durationSeconds: 3,
    });

    expect(createGoogleGenAIMock).toHaveBeenCalledWith(
      expect.objectContaining({
        httpOptions: expect.objectContaining({
          baseUrl: "https://generativelanguage.googleapis.com",
        }),
      }),
    );
  });

  it("rejects mixed image and video inputs", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    const provider = buildGoogleVideoGenerationProvider();

    await expect(
      provider.generateVideo({
        provider: "google",
        model: "veo-3.1-fast-generate-preview",
        prompt: "Animate",
        cfg: {},
        inputImages: [{ buffer: Buffer.from("img"), mimeType: "image/png" }],
        inputVideos: [{ buffer: Buffer.from("vid"), mimeType: "video/mp4" }],
      }),
    ).rejects.toThrow("Google video generation does not support image and video inputs together.");
  });

  it("rounds unsupported durations to the nearest Veo value", async () => {
    vi.spyOn(providerAuthRuntime, "resolveApiKeyForProvider").mockResolvedValue({
      apiKey: "google-key",
      source: "env",
      mode: "api-key",
    });
    generateVideosMock.mockResolvedValue({
      done: true,
      response: {
        generatedVideos: [
          {
            video: {
              videoBytes: Buffer.from("mp4-bytes").toString("base64"),
              mimeType: "video/mp4",
            },
          },
        ],
      },
    });

    const provider = buildGoogleVideoGenerationProvider();
    await provider.generateVideo({
      provider: "google",
      model: "veo-3.1-fast-generate-preview",
      prompt: "A tiny robot watering a windowsill garden",
      cfg: {},
      durationSeconds: 5,
    });

    expect(generateVideosMock).toHaveBeenCalledWith(
      expect.objectContaining({
        config: expect.objectContaining({
          durationSeconds: 6,
        }),
      }),
    );
  });
});