/**
 * Frontend Service Tests für SAAP API Client
 * Tests für API-Kommunikation mit dem Backend
 */

import { describe, it, expect, beforeEach, vi } from 'vitest'
import axios from 'axios'

// Create mock axios instance
const mockAxiosInstance = {
  get: vi.fn(),
  post: vi.fn(),
  put: vi.fn(),
  delete: vi.fn(),
  interceptors: {
    request: { use: vi.fn(), eject: vi.fn() },
    response: { use: vi.fn(), eject: vi.fn() }
  }
}

// Mock axios completely
vi.mock('axios', () => {
  return {
    default: {
      create: vi.fn(() => mockAxiosInstance),
      get: vi.fn(),
      post: vi.fn()
    }
  }
})

// Import after mocking
const { saapApi } = await import('../src/services/saapApi.js')

describe('SAAP API Service', () => {
  beforeEach(() => {
    // Clear all mocks before each test
    vi.clearAllMocks()
  })

  describe('getAgents', () => {
    it('should fetch all agents successfully', async () => {
      const mockAgents = {
        agents: [
          { id: 'jane_alesi', name: 'Jane Alesi', status: 'active' },
          { id: 'john_alesi', name: 'John Alesi', status: 'inactive' }
        ],
        total: 2
      }

      mockAxiosInstance.get.mockResolvedValue({ data: mockAgents })

      const result = await saapApi.getAgents()

      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/agents')
      expect(result).toEqual(mockAgents)
      expect(result.agents).toHaveLength(2)
    })

    it('should handle API errors gracefully', async () => {
      mockAxiosInstance.get.mockRejectedValue(new Error('Network error'))

      await expect(saapApi.getAgents()).rejects.toThrow('Network error')
    })
  })

  describe('getAgent', () => {
    it('should fetch specific agent by ID', async () => {
      const mockAgent = {
        id: 'jane_alesi',
        name: 'Jane Alesi',
        type: 'coordinator',
        status: 'active'
      }

      mockAxiosInstance.get.mockResolvedValue({ data: mockAgent })

      const result = await saapApi.getAgent('jane_alesi')

      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/agents/jane_alesi')
      expect(result).toEqual(mockAgent)
    })

    it('should handle 404 for non-existent agent', async () => {
      mockAxiosInstance.get.mockRejectedValue({
        response: { status: 404, data: { detail: 'Agent not found' } }
      })

      await expect(saapApi.getAgent('nonexistent')).rejects.toThrow()
    })
  })

  describe('createAgent', () => {
    it('should create new agent successfully', async () => {
      const newAgent = {
        id: 'test_agent',
        name: 'Test Agent',
        type: 'developer',
        description: 'Test agent'
      }

      const mockResponse = {
        success: true,
        agent: { ...newAgent, status: 'inactive' }
      }

      mockAxiosInstance.post.mockResolvedValue({ data: mockResponse })

      const result = await saapApi.createAgent(newAgent)

      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/agents', newAgent)
      expect(result.success).toBe(true)
      expect(result.agent.id).toBe('test_agent')
    })

    it('should handle validation errors', async () => {
      mockAxiosInstance.post.mockRejectedValue({
        response: { status: 422, data: { detail: 'Validation error' } }
      })

      await expect(saapApi.createAgent({})).rejects.toThrow()
    })
  })

  describe('startAgent', () => {
    it('should start agent successfully', async () => {
      const mockResponse = {
        success: true,
        message: 'Agent started',
        status: 'active'
      }

      mockAxiosInstance.post.mockResolvedValue({ data: mockResponse })

      const result = await saapApi.startAgent('jane_alesi')

      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/agents/jane_alesi/start')
      expect(result.success).toBe(true)
    })
  })

  describe('stopAgent', () => {
    it('should stop agent successfully', async () => {
      const mockResponse = {
        success: true,
        message: 'Agent stopped',
        status: 'inactive'
      }

      mockAxiosInstance.post.mockResolvedValue({ data: mockResponse })

      const result = await saapApi.stopAgent('jane_alesi')

      expect(mockAxiosInstance.post).toHaveBeenCalledWith('/agents/jane_alesi/stop')
      expect(result.success).toBe(true)
    })
  })

  describe('chatWithAgent', () => {
    it('should send chat message to agent', async () => {
      const mockResponse = {
        success: true,
        response: {
          content: 'Hello! How can I help you?',
          provider: 'colossus'
        }
      }

      mockAxiosInstance.post.mockResolvedValue({ data: mockResponse })

      const result = await saapApi.chatWithAgent('jane_alesi', 'Hello')

      expect(mockAxiosInstance.post).toHaveBeenCalledWith(
        '/agents/jane_alesi/chat',
        { message: 'Hello' }
      )
      expect(result.success).toBe(true)
      expect(result.response.content).toBeDefined()
    })

    it('should handle empty message', async () => {
      mockAxiosInstance.post.mockRejectedValue({
        response: { status: 400, data: { detail: 'Message required' } }
      })

      await expect(saapApi.chatWithAgent('jane_alesi', '')).rejects.toThrow()
    })
  })

  describe('getAgentTemplates', () => {
    it('should fetch all agent templates', async () => {
      const mockTemplates = {
        templates: {
          jane_alesi: { id: 'jane_alesi', name: 'Jane Alesi' },
          john_alesi: { id: 'john_alesi', name: 'John Alesi' }
        },
        count: 2
      }

      mockAxiosInstance.get.mockResolvedValue({ data: mockTemplates })

      const result = await saapApi.getAgentTemplates()

      expect(mockAxiosInstance.get).toHaveBeenCalledWith('/templates/agents')
      expect(result.count).toBe(2)
      expect(result.templates).toHaveProperty('jane_alesi')
    })
  })

  describe('multiAgentChat', () => {
    it('should send multi-agent chat request', async () => {
      const mockResponse = {
        success: true,
        coordinator: 'jane_alesi',
        specialist_agent: 'john_alesi',
        delegation_used: true,
        response: {
          content: 'Coordinated response'
        }
      }

      mockAxiosInstance.post.mockResolvedValue({ data: mockResponse })

      const result = await saapApi.multiAgentChat('Create a website')

      // Verify the call was made to the correct endpoint
      expect(mockAxiosInstance.post).toHaveBeenCalledWith(
        '/multi-agent/chat',
        expect.objectContaining({
          preferred_agent: null,
          task_priority: 'normal'
        }),
        expect.objectContaining({
          timeout: 240000
        })
      )
      expect(result.success).toBe(true)
      expect(result.delegation_used).toBe(true)
    })
  })
})

describe('SAAP API Error Handling', () => {
  it('should handle network errors', async () => {
    mockAxiosInstance.get.mockRejectedValue(new Error('Network Error'))

    await expect(saapApi.getAgents()).rejects.toThrow('Network Error')
  })

  it('should handle timeout errors', async () => {
    mockAxiosInstance.get.mockRejectedValue({ code: 'ECONNABORTED' })

    await expect(saapApi.getAgents()).rejects.toThrow()
  })

  it('should handle server errors (500)', async () => {
    mockAxiosInstance.get.mockRejectedValue({
      response: { status: 500, data: { detail: 'Internal Server Error' } }
    })

    await expect(saapApi.getAgents()).rejects.toThrow()
  })
})