import { render, screen, waitFor } from "@testing-library/react";
import userEvent from "@testing-library/user-event";
import { describe, expect, it, vi, beforeEach, afterEach } from "vitest";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { ConversationTabTitle } from "#/components/features/conversation/conversation-tabs/conversation-tab-title";
import GitService from "#/api/git-service/git-service.api";
import V1GitService from "#/api/git-service/v1-git-service.api";
import { useConversationStore } from "#/stores/conversation-store";
import { useAgentStore } from "#/stores/agent-store";
import { useOptimisticUserMessageStore } from "#/stores/optimistic-user-message-store";
import { AgentState } from "#/types/agent-state";
import { createChatMessage } from "#/services/chat-service";

// Mock the services that the hook depends on
vi.mock("#/api/git-service/git-service.api");
vi.mock("#/api/git-service/v1-git-service.api");

// Mock i18n
vi.mock("react-i18next", async (importOriginal) => {
  const actual = await importOriginal<typeof import("react-i18next")>();
  return {
    ...actual,
    useTranslation: () => ({
      t: (key: string) => key,
    }),
  };
});

// Mock services for Build button
const mockSend = vi.fn();

vi.mock("#/hooks/use-send-message", () => ({
  useSendMessage: vi.fn(() => ({
    send: mockSend,
  })),
}));

vi.mock("#/services/chat-service", () => ({
  createChatMessage: vi.fn((content, imageUrls, fileUrls, timestamp) => ({
    action: "message",
    args: { content, image_urls: imageUrls, file_urls: fileUrls, timestamp },
  })),
}));

// Mock the hooks that useUnifiedGetGitChanges depends on
vi.mock("#/hooks/use-conversation-id", () => ({
  useConversationId: () => ({
    conversationId: "test-conversation-id",
  }),
}));

vi.mock("#/hooks/query/use-active-conversation", () => ({
  useActiveConversation: () => ({
    data: {
      conversation_version: "V0",
      url: null,
      session_api_key: null,
      selected_repository: null,
    },
  }),
}));

vi.mock("#/hooks/use-runtime-is-ready", () => ({
  useRuntimeIsReady: () => true,
}));

vi.mock("#/utils/get-git-path", () => ({
  getGitPath: () => "/workspace",
}));

describe("ConversationTabTitle", () => {
  let queryClient: QueryClient;

  beforeEach(() => {
    queryClient = new QueryClient({
      defaultOptions: {
        queries: {
          retry: false,
        },
      },
    });

    // Mock GitService methods
    vi.mocked(GitService.getGitChanges).mockResolvedValue([]);
    vi.mocked(V1GitService.getGitChanges).mockResolvedValue([]);

    // Reset stores for Build button tests
    useConversationStore.setState({
      planContent: null,
      conversationMode: "plan",
    });
    useAgentStore.setState({
      curAgentState: AgentState.AWAITING_USER_INPUT,
    });
    useOptimisticUserMessageStore.setState({
      optimisticUserMessage: null,
    });
  });

  afterEach(() => {
    vi.clearAllMocks();
    queryClient.clear();
    localStorage.clear();
  });

  const renderWithProviders = (ui: React.ReactElement) => {
    return render(
      <QueryClientProvider client={queryClient}>{ui}</QueryClientProvider>,
    );
  };

  describe("Rendering", () => {
    it("should render the title", () => {
      // Arrange
      const title = "Test Title";

      // Act
      renderWithProviders(
        <ConversationTabTitle title={title} conversationKey="browser" />,
      );

      // Assert
      expect(screen.getByText(title)).toBeInTheDocument();
    });

    it("should show refresh button when conversationKey is 'editor'", () => {
      // Arrange
      const title = "Changes";

      // Act
      renderWithProviders(
        <ConversationTabTitle title={title} conversationKey="editor" />,
      );

      // Assert
      const refreshButton = screen.getByRole("button");
      expect(refreshButton).toBeInTheDocument();
    });

    it("should not show refresh button when conversationKey is not 'editor'", () => {
      // Arrange
      const title = "Browser";

      // Act
      renderWithProviders(
        <ConversationTabTitle title={title} conversationKey="browser" />,
      );

      // Assert
      expect(screen.queryByRole("button")).not.toBeInTheDocument();
    });
  });

  describe("User Interactions", () => {
    it("should call refetch and trigger GitService.getGitChanges when refresh button is clicked", async () => {
      // Arrange
      const user = userEvent.setup();
      const title = "Changes";
      const mockGitChanges: Array<{
        path: string;
        status: "M" | "A" | "D" | "R" | "U";
      }> = [
        { path: "file1.ts", status: "M" },
        { path: "file2.ts", status: "A" },
      ];

      vi.mocked(GitService.getGitChanges).mockResolvedValue(mockGitChanges);

      renderWithProviders(
        <ConversationTabTitle title={title} conversationKey="editor" />,
      );

      const refreshButton = screen.getByRole("button");

      // Wait for initial query to complete
      await waitFor(() => {
        expect(GitService.getGitChanges).toHaveBeenCalled();
      });

      // Clear the mock to track refetch calls
      vi.mocked(GitService.getGitChanges).mockClear();

      // Act
      await user.click(refreshButton);

      // Assert - refetch should trigger another service call
      await waitFor(() => {
        expect(GitService.getGitChanges).toHaveBeenCalledWith(
          "test-conversation-id",
        );
      });
    });
  });

  describe("Build Button", () => {
    it("should show Build button when conversationKey is 'planner' and planContent exists", () => {
      // Arrange
      useConversationStore.setState({ planContent: "# Plan content" });

      // Act
      renderWithProviders(
        <ConversationTabTitle title="Planner" conversationKey="planner" />,
      );

      // Assert
      const buildButton = screen.getByTestId("planner-tab-build-button");
      expect(buildButton).toBeInTheDocument();
    });

    it("should not show Build button when conversationKey is not 'planner'", () => {
      // Arrange
      useConversationStore.setState({ planContent: "# Plan content" });

      // Act
      renderWithProviders(
        <ConversationTabTitle title="Browser" conversationKey="browser" />,
      );

      // Assert
      expect(
        screen.queryByTestId("planner-tab-build-button"),
      ).not.toBeInTheDocument();
    });

    it("should disable Build button when no planContent exists", () => {
      // Arrange
      useConversationStore.setState({ planContent: null });
      useAgentStore.setState({ curAgentState: AgentState.AWAITING_USER_INPUT });

      // Act
      renderWithProviders(
        <ConversationTabTitle title="Planner" conversationKey="planner" />,
      );

      // Assert
      const buildButton = screen.getByTestId("planner-tab-build-button");
      expect(buildButton).toBeDisabled();
    });

    it("should disable Build button when agent is running", () => {
      // Arrange
      useConversationStore.setState({ planContent: "# Plan content" });
      useAgentStore.setState({ curAgentState: AgentState.RUNNING });

      // Act
      renderWithProviders(
        <ConversationTabTitle title="Planner" conversationKey="planner" />,
      );

      // Assert
      const buildButton = screen.getByTestId("planner-tab-build-button");
      expect(buildButton).toBeDisabled();
    });

    it("should switch to code mode and send message when Build button is clicked", async () => {
      // Arrange
      const user = userEvent.setup();
      useConversationStore.setState({
        planContent: "# Plan content",
        conversationMode: "plan",
      });
      useAgentStore.setState({ curAgentState: AgentState.AWAITING_USER_INPUT });

      renderWithProviders(
        <ConversationTabTitle title="Planner" conversationKey="planner" />,
      );

      const buildButton = screen.getByTestId("planner-tab-build-button");

      // Act
      await user.click(buildButton);

      // Assert
      expect(useConversationStore.getState().conversationMode).toBe("code");
      expect(createChatMessage).toHaveBeenCalledWith(
        "Execute the plan based on the .agents_tmp/PLAN.md file.",
        [],
        [],
        expect.any(String),
      );
      expect(mockSend).toHaveBeenCalled();
    });
  });
});