import { fireEvent, render, screen, waitFor } from '@testing-library/react'
import { beforeEach, describe, expect, it, vi } from 'vitest'
import { createProviderFromPreset } from '../../src/ai/providerPresets'
import AiProviderSettings from '../../src/components/settings/AiProviderSettings'
import { useAiProviderStore } from '../../src/stores/aiProviderStore'
import { mockDesktopApi } from '../setup'

describe('AI provider settings', () => {
  beforeEach(() => {
    vi.clearAllMocks()
    useAiProviderStore.setState({
      providers: [],
      activeProviderId: '',
      isLoaded: true,
      catalogProviders: [],
      catalogUpdatedAt: null,
    })
    vi.mocked(mockDesktopApi.aiTestProvider).mockResolvedValue({
      success: true,
      status: 200,
      model: 'deepseek-chat',
      latencyMs: 92,
      answer: 'OK',
    })
  })

  it('keeps a new provider transient until a real connection test passes', async () => {
    render(<AiProviderSettings />)
    fireEvent.click(screen.getByRole('button', { name: '添加' }))

    expect(useAiProviderStore.getState().providers).toHaveLength(0)
    expect(mockDesktopApi.settingsSet).not.toHaveBeenCalled()
    const save = screen.getByRole('button', { name: '保存' })
    expect(save).toBeDisabled()

    fireEvent.change(screen.getByLabelText('API 密钥'), { target: { value: 'sk-test-only' } })
    fireEvent.click(screen.getByRole('button', { name: '测试' }))

    await waitFor(() => expect(mockDesktopApi.aiTestProvider).toHaveBeenCalled())
    expect(mockDesktopApi.aiProviderSaveKey).not.toHaveBeenCalled()
    expect(await screen.findByText(/可用/)).toBeVisible()
    expect(save).toBeEnabled()
    expect(screen.queryByRole('button', { name: '测试' })).not.toBeInTheDocument()

    fireEvent.click(save)
    await waitFor(() => expect(useAiProviderStore.getState().providers).toHaveLength(1))
    await waitFor(() => expect(screen.queryByRole('button', { name: '保存' })).not.toBeInTheDocument())
    expect(screen.queryByRole('button', { name: '测试' })).not.toBeInTheDocument()
    expect(screen.queryByText(/可用/)).not.toBeInTheDocument()
    expect(mockDesktopApi.aiProviderSaveKey).toHaveBeenCalledWith(expect.any(String), 'sk-test-only')
    expect(JSON.stringify(vi.mocked(mockDesktopApi.settingsSet).mock.calls)).not.toContain('sk-test-only')
  })

  it('invalidates a successful test whenever a connection field changes', async () => {
    render(<AiProviderSettings />)
    fireEvent.click(screen.getByRole('button', { name: '添加' }))
    fireEvent.change(screen.getByLabelText('API 密钥'), { target: { value: 'sk-test-only' } })
    fireEvent.click(screen.getByRole('button', { name: '测试' }))
    const save = screen.getByRole('button', { name: '保存' })
    await waitFor(() => expect(save).toBeEnabled())

    fireEvent.click(screen.getByRole('button', { name: '高级' }))
    fireEvent.change(screen.getByLabelText('接口地址'), { target: { value: 'https://proxy.example.com/v1' } })
    expect(save).toBeDisabled()
    expect(screen.getByText('请重新测试')).toBeVisible()
  })

  function loadSavedProvider() {
    const provider = { ...createProviderFromPreset('deepseek'), hasApiKey: true }
    useAiProviderStore.setState({ providers: [provider], activeProviderId: '' })
    return provider
  }

  it('hides clean actions, saves name changes without testing, and offers a default action', async () => {
    loadSavedProvider()
    render(<AiProviderSettings />)
    expect(screen.queryByRole('button', { name: '测试' })).not.toBeInTheDocument()
    expect(screen.queryByRole('button', { name: '保存' })).not.toBeInTheDocument()
    expect(screen.getByRole('button', { name: '设为默认' })).toBeVisible()

    fireEvent.change(screen.getByLabelText('名称'), { target: { value: 'Work' } })
    expect(screen.queryByRole('button', { name: '测试' })).not.toBeInTheDocument()
    expect(screen.queryByRole('button', { name: '设为默认' })).not.toBeInTheDocument()
    fireEvent.click(screen.getByRole('button', { name: '保存' }))
    await waitFor(() => expect(screen.queryByRole('button', { name: '保存' })).not.toBeInTheDocument())
    expect(useAiProviderStore.getState().providers[0].name).toBe('Work')
    expect(mockDesktopApi.aiTestProvider).not.toHaveBeenCalled()
  })

  it('requires validation for token edits and returns to clean state on revert or cancel', () => {
    const provider = loadSavedProvider()
    render(<AiProviderSettings />)
    fireEvent.change(screen.getByLabelText('API 密钥'), { target: { value: 'sk-new' } })
    expect(screen.getByRole('button', { name: '测试' })).toBeEnabled()
    expect(screen.getByRole('button', { name: '保存' })).toBeDisabled()
    fireEvent.change(screen.getByLabelText('API 密钥'), { target: { value: '' } })
    expect(screen.queryByRole('button', { name: '保存' })).not.toBeInTheDocument()

    fireEvent.click(screen.getByRole('button', { name: '高级' }))
    fireEvent.change(screen.getByLabelText('接口地址'), { target: { value: 'https://proxy.example.com/v1' } })
    expect(screen.getByRole('button', { name: '保存' })).toBeDisabled()
    fireEvent.click(screen.getByRole('button', { name: '取消修改' }))
    expect(screen.queryByRole('button', { name: '保存' })).not.toBeInTheDocument()
    expect(useAiProviderStore.getState().providers[0]).toEqual(provider)
  })

  it('keeps manual connection checks in advanced settings without requiring another save', async () => {
    loadSavedProvider()
    render(<AiProviderSettings />)
    fireEvent.click(screen.getByRole('button', { name: '高级' }))
    fireEvent.click(screen.getByRole('button', { name: '重新测试连接' }))
    expect(await screen.findByText(/可用/)).toBeVisible()
    expect(screen.queryByRole('button', { name: '保存' })).not.toBeInTheDocument()
    expect(mockDesktopApi.settingsSet).not.toHaveBeenCalled()
  })

  it('keeps edits available when saving fails', async () => {
    loadSavedProvider()
    vi.mocked(mockDesktopApi.settingsSet).mockRejectedValueOnce(new Error('Write failed'))
    render(<AiProviderSettings />)
    fireEvent.change(screen.getByLabelText('名称'), { target: { value: 'Unsaved name' } })
    fireEvent.click(screen.getByRole('button', { name: '保存' }))
    expect(await screen.findByRole('alert')).toHaveTextContent('Write failed')
    expect(screen.getByRole('button', { name: '保存' })).toBeEnabled()
    expect(screen.getByLabelText('名称')).toHaveValue('Unsaved name')
    expect(useAiProviderStore.getState().providers[0].name).toBe('DeepSeek')
  })
})