import { fireEvent, render, screen, waitFor } from '@testing-library/react'
import userEvent from '@testing-library/user-event'
import { beforeEach, describe, expect, it, vi } from 'vitest'
import SFTPView from '../../src/components/sftp/SFTPView'
import { usePoolStore } from '../../src/stores/connection/poolStore'
import { useSessionStore } from '../../src/stores/sessionStore'
import { useTabStore } from '../../src/stores/tabStore'
import { mockDesktopApi } from '../setup'

const session = {
  id: 'opsbase',
  name: 'OpsBase',
  host: 'opsbase.cn',
  port: 55555,
  username: 'root',
  authType: 'agent' as const,
}

const remoteFile = {
  filename: 'remote.txt',
  longname: '-rw-r--r-- 1 root root 12 Jul 30 12:00 remote.txt',
  attrs: { size: 12, mtime: 1_700_000_000, mode: 0o100644 },
}

function createDataTransfer(): DataTransfer {
  const values = new Map<string, string>()
  const transfer = {
    effectAllowed: 'all',
    dropEffect: 'none',
    files: [] as unknown as FileList,
    types: [] as string[],
    setData(type: string, value: string) {
      values.set(type, value)
      if (!this.types.includes(type)) this.types.push(type)
    },
    getData(type: string) {
      return values.get(type) || ''
    },
  }
  return transfer as unknown as DataTransfer
}

describe('SFTP basic transfer acceptance', () => {
  beforeEach(() => {
    vi.clearAllMocks()
    window.opsxApi = mockDesktopApi
    usePoolStore.setState({ connections: new Map() })
    useSessionStore.setState({ sessions: [session] })
    useTabStore.setState({
      tabs: [{ id: 'sftp-tab', title: 'SFTP: OpsBase', type: 'sftp', sessionId: session.id, isActive: true }],
      activeTabId: 'sftp-tab',
    })
    vi.mocked(mockDesktopApi.sshConnect).mockResolvedValue({ success: true, connectionId: 'conn-sftp' })
    vi.mocked(mockDesktopApi.sessionGetById).mockResolvedValue({ success: true, session })
    vi.mocked(mockDesktopApi.sftpConnect).mockResolvedValue({ success: true, sftpId: 'sftp-native' })
    vi.mocked(mockDesktopApi.sftpListDirectory).mockResolvedValue({ success: true, files: [remoteFile] })
    vi.mocked(mockDesktopApi.getHomePath).mockResolvedValue({ success: true, path: '/Users/test' })
    vi.mocked(mockDesktopApi.localReadDir).mockResolvedValue({ success: true, files: [] })
  })

  it('uploads the absolute path returned by the native file picker', async () => {
    const user = userEvent.setup()
    vi.mocked(mockDesktopApi.showOpenDialog).mockResolvedValueOnce({
      canceled: false,
      filePaths: ['/tmp/actual-selected.txt'],
    })
    vi.mocked(mockDesktopApi.localGetStats).mockResolvedValueOnce({
      success: true,
      stats: { name: 'actual-selected.txt', path: '/tmp/actual-selected.txt', type: 'file', size: 17 },
    })

    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)
    await screen.findByRole('button', { name: '上传到远程' })
    await user.click(screen.getByRole('button', { name: '上传到远程' }))

    await waitFor(() => {
      expect(mockDesktopApi.sftpUpload).toHaveBeenCalledWith(
        'sftp-native',
        '/tmp/actual-selected.txt',
        '/root/actual-selected.txt'
      )
    })
  })

  it('downloads a selected remote file into the current local directory', async () => {
    const user = userEvent.setup()
    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)

    await screen.findByRole('button', { name: '上传到远程' })
    await user.click(await screen.findByText('remote.txt'))
    await user.click(screen.getByRole('button', { name: '下载到本地' }))

    await waitFor(() => {
      expect(mockDesktopApi.sftpDownload).toHaveBeenCalledWith(
        'sftp-native',
        '/root/remote.txt',
        '/Users/test/remote.txt'
      )
    })
  })

  it('shows the native upload failure instead of reporting success', async () => {
    const user = userEvent.setup()
    vi.mocked(mockDesktopApi.showOpenDialog).mockResolvedValueOnce({
      canceled: false,
      filePaths: ['/tmp/denied.txt'],
    })
    vi.mocked(mockDesktopApi.localGetStats).mockResolvedValueOnce({
      success: true,
      stats: { name: 'denied.txt', path: '/tmp/denied.txt', type: 'file', size: 4 },
    })
    vi.mocked(mockDesktopApi.sftpUpload).mockResolvedValueOnce({
      success: false,
      error: 'Permission denied',
    })

    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)
    await screen.findByRole('button', { name: '上传到远程' })
    await user.click(screen.getByRole('button', { name: '上传到远程' }))

    expect(await screen.findByText(/权限|Permission denied|失败/)).toBeVisible()
  })

  it('uploads by pointer-dragging a local row onto the remote panel', async () => {
    vi.mocked(mockDesktopApi.localReadDir).mockResolvedValue({
      success: true,
      files: [{ name: 'local.txt', path: '/Users/test/local.txt', type: 'file', size: 8, modified: 1_700_000_000 }],
    })
    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)
    await screen.findByRole('button', { name: '上传到远程' })

    const localRow = await screen.findByText('local.txt')
    const remotePanel = screen.getByLabelText('远程文件面板')
    const originalElementFromPoint = document.elementFromPoint
    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: vi.fn(() => remotePanel),
    })

    fireEvent.pointerDown(localRow, { button: 0, pointerId: 11, clientX: 10, clientY: 10 })
    fireEvent.pointerMove(localRow, { pointerId: 11, clientX: 30, clientY: 30 })
    fireEvent.pointerUp(localRow, { button: 0, pointerId: 11, clientX: 30, clientY: 30 })

    await waitFor(() => {
      expect(mockDesktopApi.sftpUpload).toHaveBeenCalledWith(
        'sftp-native',
        '/Users/test/local.txt',
        '/root/local.txt'
      )
    })

    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: originalElementFromPoint,
    })
  })

  it('downloads by pointer-dragging a remote row onto the local panel', async () => {
    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)
    await screen.findByRole('button', { name: '上传到远程' })

    const remoteRow = await screen.findByText('remote.txt')
    const localPanel = screen.getByLabelText('本地文件面板')
    const originalElementFromPoint = document.elementFromPoint
    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: vi.fn(() => localPanel),
    })

    fireEvent.pointerDown(remoteRow, { button: 0, pointerId: 12, clientX: 50, clientY: 50 })
    fireEvent.pointerMove(remoteRow, { pointerId: 12, clientX: 70, clientY: 70 })
    fireEvent.pointerUp(remoteRow, { button: 0, pointerId: 12, clientX: 70, clientY: 70 })

    await waitFor(() => {
      expect(mockDesktopApi.sftpDownload).toHaveBeenCalledWith(
        'sftp-native',
        '/root/remote.txt',
        '/Users/test/remote.txt'
      )
    })

    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: originalElementFromPoint,
    })
  })

  it('still accepts OS file HTML5 drops onto the remote panel', async () => {
    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)
    await screen.findByRole('button', { name: '上传到远程' })

    const file = new File(['hello'], 'from-os.txt', { type: 'text/plain' })
    Object.defineProperty(file, 'path', { value: '/Users/test/from-os.txt' })
    const transfer = createDataTransfer()
    Object.defineProperty(transfer, 'types', { value: ['Files'] })
    Object.defineProperty(transfer, 'files', {
      value: {
        length: 1,
        0: file,
        item: (index: number) => (index === 0 ? file : null),
        [Symbol.iterator]: function* () {
          yield file
        },
      },
    })

    fireEvent.dragEnter(screen.getByLabelText('远程文件面板'), { dataTransfer: transfer })
    fireEvent.drop(screen.getByLabelText('远程文件面板'), { dataTransfer: transfer })

    await waitFor(() => {
      expect(mockDesktopApi.sftpUpload).toHaveBeenCalledWith(
        'sftp-native',
        '/Users/test/from-os.txt',
        '/root/from-os.txt'
      )
    })
  })

  it('transfers both ways through pointer dragging when the WebView does not deliver HTML5 drop', async () => {
    vi.mocked(mockDesktopApi.localReadDir).mockResolvedValue({
      success: true,
      files: [{ name: 'local.txt', path: '/Users/test/local.txt', type: 'file', size: 8, modified: 1_700_000_000 }],
    })
    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)
    const localRow = await screen.findByText('local.txt')
    const remoteRow = await screen.findByText('remote.txt')
    const localPanel = screen.getByLabelText('本地文件面板')
    const remotePanel = screen.getByLabelText('远程文件面板')
    const hitTest = vi.fn<() => Element | null>(() => remotePanel)
    const originalElementFromPoint = document.elementFromPoint
    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: hitTest,
    })

    fireEvent.pointerDown(localRow, { button: 0, pointerId: 1, clientX: 10, clientY: 10 })
    fireEvent.pointerMove(localRow, { pointerId: 1, clientX: 30, clientY: 30 })
    fireEvent.pointerUp(localRow, { button: 0, pointerId: 1, clientX: 30, clientY: 30 })

    await waitFor(() => {
      expect(mockDesktopApi.sftpUpload).toHaveBeenCalledWith(
        'sftp-native',
        '/Users/test/local.txt',
        '/root/local.txt'
      )
    })

    hitTest.mockReturnValue(localPanel)
    fireEvent.pointerDown(remoteRow, { button: 0, pointerId: 2, clientX: 50, clientY: 50 })
    fireEvent.pointerMove(remoteRow, { pointerId: 2, clientX: 70, clientY: 70 })
    fireEvent.pointerUp(remoteRow, { button: 0, pointerId: 2, clientX: 70, clientY: 70 })

    await waitFor(() => {
      expect(mockDesktopApi.sftpDownload).toHaveBeenCalledWith(
        'sftp-native',
        '/root/remote.txt',
        '/Users/test/remote.txt'
      )
    })

    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: originalElementFromPoint,
    })
  })

  it('uses the directory under the pointer as the transfer destination', async () => {
    vi.mocked(mockDesktopApi.localReadDir).mockResolvedValue({
      success: true,
      files: [{ name: 'local.txt', path: '/Users/test/local.txt', type: 'file', size: 8, modified: 1_700_000_000 }],
    })
    vi.mocked(mockDesktopApi.sftpListDirectory).mockResolvedValue({
      success: true,
      files: [
        remoteFile,
        {
          filename: 'archive',
          longname: 'drwxr-xr-x 1 root root 0 Jul 30 12:00 archive',
          attrs: { size: 0, mtime: 1_700_000_000, mode: 0o040755 },
        },
      ],
    })
    render(<SFTPView tabId="sftp-tab" sessionId={session.id} />)
    const localRow = await screen.findByText('local.txt')
    const archiveRow = await screen.findByText('archive')
    const originalElementFromPoint = document.elementFromPoint
    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: vi.fn(() => archiveRow),
    })

    fireEvent.pointerDown(localRow, { button: 0, pointerId: 3, clientX: 10, clientY: 10 })
    fireEvent.pointerMove(localRow, { pointerId: 3, clientX: 40, clientY: 40 })
    fireEvent.pointerUp(localRow, { button: 0, pointerId: 3, clientX: 40, clientY: 40 })

    await waitFor(() => {
      expect(mockDesktopApi.sftpUpload).toHaveBeenCalledWith(
        'sftp-native',
        '/Users/test/local.txt',
        '/root/archive/local.txt'
      )
    })

    Object.defineProperty(document, 'elementFromPoint', {
      configurable: true,
      value: originalElementFromPoint,
    })
  })
})