import { MessageInput } from '@components/PageComponents/Messages/MessageInput.tsx';
import { useDevice } from "@core/stores/deviceStore.ts";
import { vi, describe, it, expect, beforeEach, Mock } from 'vitest';
import { render, screen, fireEvent, waitFor } from '@testing-library/react';
import userEvent from '@testing-library/user-event';

vi.mock("@core/stores/deviceStore.ts", () => ({
  useDevice: vi.fn(),
}));

vi.mock("@core/utils/debounce.ts", () => ({
  debounce: (fn: () => void) => fn,
}));

vi.mock("@components/UI/Button.tsx", () => ({
  Button: ({ children, ...props }: { children: React.ReactNode }) => <button {...props}>{children}</button>
}));

vi.mock("@components/UI/Input.tsx", () => ({
  Input: (props: any) => <input {...props} />
}));

vi.mock("lucide-react", () => ({
  SendIcon: () => <div data-testid="send-icon">Send</div>
}));

// TODO: getting an error with this test
describe('MessageInput Component', () => {
  const mockProps = {
    to: "broadcast" as const,
    channel: 0 as const,
    maxBytes: 100,
  };

  const mockSetMessageDraft = vi.fn();
  const mockSetMessageState = vi.fn();
  const mockSendText = vi.fn().mockResolvedValue(123);

  beforeEach(() => {
    vi.clearAllMocks();

    (useDevice as Mock).mockReturnValue({
      connection: {
        sendText: mockSendText,
      },
      setMessageState: mockSetMessageState,
      messageDraft: "",
      setMessageDraft: mockSetMessageDraft,
      hardware: {
        myNodeNum: 1234567890,
      },
    });
  });

  it('renders correctly with initial state', () => {
    render(<MessageInput {...mockProps} />);

    expect(screen.getByPlaceholderText('Enter Message')).toBeInTheDocument();
    expect(screen.getByTestId('send-icon')).toBeInTheDocument();

    expect(screen.getByText('0/100')).toBeInTheDocument();
  });

  it('updates local draft and byte count when typing', () => {
    render(<MessageInput {...mockProps} />);

    const inputField = screen.getByPlaceholderText('Enter Message');
    fireEvent.change(inputField, { target: { value: 'Hello' } })

    expect(screen.getByText('5/100')).toBeInTheDocument();
    expect(inputField).toHaveValue('Hello');
    expect(mockSetMessageDraft).toHaveBeenCalledWith('Hello');
  });

  it.skip('does not allow input exceeding max bytes', () => {
    render(<MessageInput {...mockProps} maxBytes={5} />);

    const inputField = screen.getByPlaceholderText('Enter Message');

    expect(screen.getByText('0/100')).toBeInTheDocument();

    userEvent.type(inputField, 'Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis p')

    expect(screen.getByText('100/100')).toBeInTheDocument();
    expect(inputField).toHaveValue('Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean m');
  });

  it('sends message and resets form when submitting', async () => {
    try {
      render(<MessageInput {...mockProps} />);

      const inputField = screen.getByPlaceholderText('Enter Message');
      const submitButton = screen.getByText('Send');

      fireEvent.change(inputField, { target: { value: 'Test Message' } });
      fireEvent.click(submitButton);

      const form = screen.getByRole('form');
      fireEvent.submit(form);

      expect(mockSendText).toHaveBeenCalledWith('Test message', 'broadcast', true, 0);

      await waitFor(() => {
        expect(mockSetMessageState).toHaveBeenCalledWith(
          'broadcast',
          0,
          'broadcast',
          1234567890,
          123,
          'ack'
        );

      });

      expect(inputField).toHaveValue('');
      expect(screen.getByText('0/100')).toBeInTheDocument();
      expect(mockSetMessageDraft).toHaveBeenCalledWith('');
    } catch (e) {
      console.error(e);
    }
  });
  it('prevents sending empty messages', () => {
    render(<MessageInput {...mockProps} />);

    const form = screen.getByPlaceholderText('Enter Message')
    fireEvent.submit(form);

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

  it('initializes with existing message draft', () => {
    (useDevice as Mock).mockReturnValue({
      connection: {
        sendText: mockSendText,
      },
      setMessageState: mockSetMessageState,
      messageDraft: "Existing draft",
      setMessageDraft: mockSetMessageDraft,
      isQueueingMessages: false,
      queueStatus: { free: 10 },
      hardware: {
        myNodeNum: 1234567890,
      },
    });

    render(<MessageInput {...mockProps} />);

    const inputField = screen.getByRole('textbox');

    expect(inputField).toHaveValue('Existing draft');
  });
});