import { renderHook, act } from '@testing-library/react'
import { describe, it, expect, vi, beforeEach } from 'vitest'
import { useLlamacppDevices } from '../useLlamacppDevices'

// Mock the ServiceHub
const mockGetLlamacppDevices = vi.fn()
vi.mock('@/hooks/useServiceHub', () => ({
  getServiceHub: () => ({
    hardware: () => ({
      getLlamacppDevices: mockGetLlamacppDevices,
    }),
    providers: () => ({
      updateSettings: vi.fn().mockResolvedValue(undefined),
    }),
  }),
}))

// Mock useModelProvider
const mockUpdateProvider = vi.fn()
vi.mock('../useModelProvider', () => ({
  useModelProvider: {
    getState: () => ({
      getProviderByName: () => ({
        settings: [
          {
            key: 'device',
            controller_props: { value: '' },
          },
        ],
      }),
      updateProvider: mockUpdateProvider,
    }),
  },
}))

// Mock the window.core object
Object.defineProperty(window, 'core', {
  value: {
    extensionManager: {
      getByName: vi.fn(),
    },
  },
  writable: true,
})

describe('useLlamacppDevices', () => {

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

  it('should initialize with default state', () => {
    const { result } = renderHook(() => useLlamacppDevices())

    expect(result.current.devices).toEqual([])
    expect(result.current.loading).toBe(false)
    expect(result.current.error).toBeNull()
    expect(typeof result.current.fetchDevices).toBe('function')
    expect(typeof result.current.clearError).toBe('function')
    expect(typeof result.current.setDevices).toBe('function')
    expect(typeof result.current.toggleDevice).toBe('function')
  })

  it('should fetch devices successfully with activation status', async () => {
    const mockDevices = [
      { id: 'CUDA0', name: 'NVIDIA GeForce RTX 4090', mem: 24576, free: 20480 },
      { id: 'CUDA1', name: 'NVIDIA GeForce RTX 3080', mem: 10240, free: 8192 },
    ]

    mockGetLlamacppDevices.mockResolvedValue(mockDevices)

    const { result } = renderHook(() => useLlamacppDevices())

    await act(async () => {
      await result.current.fetchDevices()
    })

    // Should have devices with activated property (empty setting means all activated)
    expect(result.current.devices).toEqual([
      { ...mockDevices[0], activated: true },
      { ...mockDevices[1], activated: true },
    ])
    expect(result.current.loading).toBe(false)
    expect(result.current.error).toBeNull()
    expect(mockGetLlamacppDevices).toHaveBeenCalledOnce()
  })

  it('should clear error', () => {
    const { result } = renderHook(() => useLlamacppDevices())

    // Set an error first
    act(() => {
      result.current.setDevices([])
    })

    // Clear the error
    act(() => {
      result.current.clearError()
    })

    expect(result.current.error).toBeNull()
  })

  it('should set devices directly', () => {
    const mockDevices = [
      { id: 'CUDA0', name: 'NVIDIA GeForce RTX 4090', mem: 24576, free: 20480 },
    ]

    const { result } = renderHook(() => useLlamacppDevices())

    act(() => {
      result.current.setDevices(mockDevices)
    })

    expect(result.current.devices).toEqual(mockDevices)
  })

  it('should toggle device activation', async () => {
    const { result } = renderHook(() => useLlamacppDevices())

    // Set initial devices with activation status
    act(() => {
      result.current.setDevices([
        { id: 'CUDA0', name: 'NVIDIA GeForce RTX 4090', mem: 24576, free: 20480, activated: false },
        { id: 'CUDA1', name: 'NVIDIA GeForce RTX 3080', mem: 10240, free: 8192, activated: false },
      ])
    })

    // Toggle a device on
    await act(async () => {
      await result.current.toggleDevice('CUDA0')
    })

    expect(result.current.devices[0].activated).toBe(true)
    expect(result.current.devices[1].activated).toBe(false)

    // Toggle the same device off
    await act(async () => {
      await result.current.toggleDevice('CUDA0')
    })

    expect(result.current.devices[0].activated).toBe(false)
    expect(result.current.devices[1].activated).toBe(false)

    // Toggle multiple devices
    await act(async () => {
      await result.current.toggleDevice('CUDA0')
    })
    await act(async () => {
      await result.current.toggleDevice('CUDA1')
    })

    expect(result.current.devices[0].activated).toBe(true)
    expect(result.current.devices[1].activated).toBe(true)
  })

})