import { jest } from '@jest/globals';

// Mock axios
jest.unstable_mockModule('axios', () => ({
  default: {
    post: jest.fn(),
  },
}));

// Mock the discord.js module
jest.unstable_mockModule('discord.js', () => ({
  SlashCommandBuilder: jest.fn().mockReturnValue({
    setName: jest.fn().mockReturnThis(),
    setDescription: jest.fn().mockReturnThis(),
    addStringOption: jest.fn().mockImplementation(callback => {
      const option = {
        setName: jest.fn().mockReturnThis(),
        setDescription: jest.fn().mockReturnThis(),
        setRequired: jest.fn().mockReturnThis(),
      };
      callback(option);
      return {
        toJSON: jest.fn().mockReturnValue({
          name: 'ask',
          description: 'Ask a question to the AI',
          options: [
            {
              name: 'prompt',
              description: 'Your question or prompt',
              type: 3,
              required: true,
            },
          ],
        }),
      };
    }),
    toJSON: jest.fn(),
  }),
}));

const axios = (await import('axios')).default;
const { createMockInteraction } = await import('../utils/testUtils.js');
const AskCommand = (await import('../../commands/ask.js')).default;
const askCommand = new AskCommand();

describe('Ask Command', () => {
  describe('Command Structure', () => {
    it('should have correct name and description', () => {
      const commandData = askCommand.defineCommand().toJSON();
      expect(commandData.name).toBe('ask');
      expect(commandData.description).toBe('Ask a question to the AI');
    });

    it('should have required command properties', () => {
      expect(askCommand).toHaveProperty('defineCommand');
      expect(askCommand).toHaveProperty('run');
      expect(typeof askCommand.run).toBe('function');
    });

    it('should have correct option configuration', () => {
      const commandData = askCommand.defineCommand().toJSON();
      const [promptOption] = commandData.options;

      expect(promptOption.name).toBe('prompt');
      expect(promptOption.description).toBe('Your question or prompt');
      expect(promptOption.required).toBe(true);
    });
  });

  describe('Command Execution', () => {
    let interaction;
    const mockPrompt = 'What is the meaning of life?';
    const mockApiResponse = {
      data: {
        choices: [
          {
            message: {
              content: 'The meaning of life is 42.',
            },
          },
        ],
      },
    };

    beforeEach(() => {
      process.env.NANOGPT_API_KEY = 'test-api-key';
      jest.clearAllMocks();

      interaction = createMockInteraction({
        commandName: 'ask',
        stringOptions: {
          prompt: mockPrompt,
        },
      });
    });

    it('should handle successful API response', async () => {
      axios.post.mockResolvedValueOnce(mockApiResponse);

      await askCommand.run(interaction);

      expect(axios.post).toHaveBeenCalledWith(
        'https://nano-gpt.com/api/v1/chat/completions',
        expect.objectContaining({
          model: 'deepseek/deepseek-v3.2',
        }),
        expect.any(Object),
      );

      expect(interaction.followUp).toHaveBeenCalledWith({
        content: expect.not.stringContaining('Web search enabled'),
        split: false,
        allowedMentions: { parse: [] },
      });
    });

    it('should handle long responses with proper chunking', async () => {
      const longResponse = 'A'.repeat(2500);
      axios.post.mockResolvedValueOnce({
        data: {
          choices: [
            {
              message: {
                content: longResponse,
              },
            },
          ],
        },
      });

      await askCommand.run(interaction);

      expect(interaction.followUp).toHaveBeenCalledTimes(2);
      expect(interaction.followUp.mock.calls[1][0].content).toContain('(continued)');
    });

    it('should handle code blocks in chunked responses', async () => {
      const responseWithCodeBlock = "Here's a code example:\n```python\nprint('hello')\n```".repeat(
        20,
      );
      axios.post.mockResolvedValueOnce({
        data: {
          choices: [
            {
              message: {
                content: responseWithCodeBlock,
              },
            },
          ],
        },
      });

      await askCommand.run(interaction);

      // Verify that code blocks are not split in the middle
      interaction.followUp.mock.calls.forEach(call => {
        const { content } = call[0];
        const openBlocks = (content.match(/```/g) || []).length;
        expect(openBlocks % 2).toBe(0); // Should always be even
      });
    });

    it('should handle API errors', async () => {
      const error = new Error('API Error');
      error.response = { data: 'API Error Details' };
      axios.post.mockRejectedValueOnce(error);

      await askCommand.run(interaction);

      expect(interaction.followUp).toHaveBeenCalledWith({
        content: 'Sorry, there was an error processing your request.',
        ephemeral: true,
      });
    });

    it('should handle rate limit errors', async () => {
      const error = new Error('Rate Limit Exceeded');
      error.response = { status: 429, data: 'Too Many Requests' };
      axios.post.mockRejectedValueOnce(error);

      await askCommand.run(interaction);

      expect(interaction.followUp).toHaveBeenCalledWith({
        content: 'The AI service is currently busy. Please try again in a few moments.',
        ephemeral: true,
      });
    });

    it('should handle timeout errors', async () => {
      const error = new Error('Timeout');
      error.code = 'ETIMEDOUT';
      axios.post.mockRejectedValueOnce(error);

      await askCommand.run(interaction);

      expect(interaction.followUp).toHaveBeenCalledWith({
        content: 'The request timed out. Please try again.',
        ephemeral: true,
      });
    });

    it('should handle invalid request errors', async () => {
      const error = new Error('Bad Request');
      error.response = { status: 400, data: 'Invalid Request' };
      axios.post.mockRejectedValueOnce(error);

      await askCommand.run(interaction);

      expect(interaction.followUp).toHaveBeenCalledWith({
        content: 'Invalid request. Please try rephrasing your question.',
        ephemeral: true,
      });
    });

    it('should send API request with correct headers', async () => {
      axios.post.mockResolvedValueOnce(mockApiResponse);

      await askCommand.run(interaction);

      expect(axios.post).toHaveBeenCalledWith(expect.any(String), expect.any(Object), {
        headers: {
          Authorization: 'Bearer test-api-key',
          'Content-Type': 'application/json',
        },
      });
    });

    it('should handle defer reply failure', async () => {
      interaction = createMockInteraction({
        commandName: 'ask',
        stringOptions: {
          prompt: mockPrompt,
        },
        deferFails: true,
      });

      await askCommand.run(interaction);

      expect(interaction.followUp).toHaveBeenCalledWith(
        expect.objectContaining({
          content: 'Sorry, there was an error processing your request.',
          ephemeral: true,
        }),
      );
    });

    it('should handle follow up failure', async () => {
      interaction = createMockInteraction({
        commandName: 'ask',
        stringOptions: {
          prompt: mockPrompt,
        },
        followUpFails: true,
      });

      axios.post.mockResolvedValueOnce(mockApiResponse);

      await expect(askCommand.run(interaction)).rejects.toThrow('Failed to follow up');
    });
  });
});