type ExecFileCallback = (
  error: (Error & { code?: string | number }) | null,
  stdout: string,
  stderr: string,
) => void
type ExecFileMock = (
  command: string,
  args: readonly string[],
  options: { encoding: string; signal: AbortSignal; windowsHide: boolean },
  callback: ExecFileCallback,
) => void

const { execFileMock } = vi.hoisted(() => ({ execFileMock: vi.fn<ExecFileMock>() }))

vi.mock('node:child_process', () => ({ execFile: execFileMock }))

import { release as osRelease } from 'node:os'
import { describe, expect, it, vi } from 'vitest'
import { openNativePath, openNativeTextFile, type PathOpenerRunner } from '../src/native-path-opener.ts'

const signal = () => new AbortController().signal

describe('native path opener', () => {
  it('opens with macOS open(1)', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '', stderr: '' }))
    await openNativePath('/Users/test/file.txt', signal(), { platform: 'darwin', run })
    expect(run).toHaveBeenCalledWith('open', ['/Users/test/file.txt'], expect.any(AbortSignal))
  })

  it('bypasses macOS file associations for text documents', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '', stderr: '' }))
    await openNativeTextFile('/Users/test/settings.yaml', signal(), { platform: 'darwin', run })
    expect(run).toHaveBeenCalledWith('open', ['-t', '/Users/test/settings.yaml'], expect.any(AbortSignal))
  })

  it('uses the Linux desktop association for text documents', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '', stderr: '' }))
    await openNativeTextFile('/tmp/settings.yaml', signal(), {
      platform: 'linux', osRelease: '6.8.0-generic', env: {}, run,
    })
    expect(run).toHaveBeenCalledWith('xdg-open', ['/tmp/settings.yaml'], expect.any(AbortSignal))
  })

  it.each([
    ['distribution marker', { WSL_DISTRO_NAME: 'Ubuntu' }, '6.8.0-generic'],
    ['interop marker', { WSL_INTEROP: '/run/WSL/123_interop' }, '6.8.0-generic'],
    ['kernel release', {}, '5.15.153.1-microsoft-standard-WSL2'],
  ])('hands WSL text documents to the Windows desktop from the %s', async (_label, env, osRelease) => {
    const requestSignal = signal()
    const run = vi.fn<PathOpenerRunner>(async command => command === 'wslpath'
      ? { stdout: '\\\\wsl.localhost\\Ubuntu\\home\\test user\\settings.yaml\r\n', stderr: '' }
      : { stdout: '', stderr: '' })
    await openNativeTextFile('/home/test user/settings.yaml', requestSignal, {
      platform: 'linux', osRelease, env, run,
    })
    expect(run.mock.calls).toEqual([
      ['wslpath', ['-w', '/home/test user/settings.yaml'], requestSignal],
      [
        'powershell.exe',
        [
          '-NoProfile',
          '-Command',
          "Invoke-Item -LiteralPath '\\\\wsl.localhost\\Ubuntu\\home\\test user\\settings.yaml'",
        ],
        requestSignal,
      ],
    ])
  })

  it('rejects an empty WSL path translation before invoking Windows', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '\r\n', stderr: '' }))
    await expect(openNativeTextFile('/home/test/settings.yaml', signal(), {
      platform: 'linux', osRelease: '6.8.0-generic', env: { WSL_DISTRO_NAME: 'Ubuntu' }, run,
    })).rejects.toThrow('wslpath returned no Windows path')
    expect(run).toHaveBeenCalledOnce()
  })

  it('does not invoke Windows when the request aborts during WSL path translation', async () => {
    const abort = new AbortController()
    const run = vi.fn<PathOpenerRunner>(async () => {
      abort.abort(new Error('closed'))
      return { stdout: '\\\\wsl.localhost\\Ubuntu\\home\\test\\settings.yaml\n', stderr: '' }
    })
    await expect(openNativeTextFile('/home/test/settings.yaml', abort.signal, {
      platform: 'linux', osRelease: '6.8.0-generic', env: { WSL_DISTRO_NAME: 'Ubuntu' }, run,
    })).rejects.toThrow('closed')
    expect(run).toHaveBeenCalledOnce()
  })

  it('opens with Windows Invoke-Item and escapes single quotes', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '', stderr: '' }))
    await openNativePath("C:\\work\\o'reilly.txt", signal(), { platform: 'win32', run })
    expect(run).toHaveBeenCalledWith(
      'powershell.exe',
      ['-NoProfile', '-Command', "Invoke-Item -LiteralPath 'C:\\work\\o''reilly.txt'"],
      expect.any(AbortSignal),
    )
  })

  it('uses the Windows desktop association for text documents', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '', stderr: '' }))
    await openNativeTextFile('C:\\work\\settings.yaml', signal(), { platform: 'win32', run })
    expect(run).toHaveBeenCalledWith(
      'powershell.exe',
      ['-NoProfile', '-Command', "Invoke-Item -LiteralPath 'C:\\work\\settings.yaml'"],
      expect.any(AbortSignal),
    )
  })

  it('opens with Linux xdg-open', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '', stderr: '' }))
    await openNativePath('/tmp/a.txt', signal(), {
      platform: 'linux', osRelease: '6.8.0-generic',
      env: { WSL_DISTRO_NAME: '', WSL_INTEROP: '' }, run,
    })
    expect(run).toHaveBeenCalledWith('xdg-open', ['/tmp/a.txt'], expect.any(AbortSignal))
  })

  it('rejects unsupported platforms', async () => {
    await expect(openNativePath('/x', signal(), { platform: 'freebsd' as NodeJS.Platform }))
      .rejects.toThrow('unsupported on freebsd')
  })

  it('uses the current process platform when no platform override is supplied', async () => {
    const run = vi.fn<PathOpenerRunner>(async () => ({ stdout: '', stderr: '' }))
    await openNativePath('/tmp/platform-default.txt', signal(), {
      osRelease: '6.8.0-generic', env: {}, run,
    })
    const expected = process.platform === 'win32'
      ? 'powershell.exe'
      : process.platform === 'linux'
        ? 'xdg-open'
        : 'open'
    expect(run.mock.calls[0]?.[0]).toBe(expected)
  })

  it('samples ambient WSL markers and kernel release when no fact overrides are supplied', async () => {
    const ambientWsl = [process.env.WSL_DISTRO_NAME, process.env.WSL_INTEROP]
      .some(value => value !== undefined && value !== '')
      || osRelease().toLowerCase().includes('microsoft')
    const run = vi.fn<PathOpenerRunner>(async command => command === 'wslpath'
      ? { stdout: 'C:\\settings.yaml\n', stderr: '' }
      : { stdout: '', stderr: '' })
    await openNativePath('/tmp/ambient-facts.yaml', signal(), { platform: 'linux', run })
    expect(run.mock.calls[0]?.[0]).toBe(ambientWsl ? 'wslpath' : 'xdg-open')
  })

  it('runs the default command adapter without a shell and preserves command failures', async () => {
    execFileMock.mockImplementationOnce((_command, _args, _options, callback) => {
      callback(null, '', '')
    })
    await openNativePath('/tmp/default.txt', signal(), { platform: 'darwin' })
    const [command, args, options] = execFileMock.mock.calls[0]!
    expect(command).toBe('open')
    expect(args).toEqual(['/tmp/default.txt'])
    expect(options.encoding).toBe('utf8')
    expect(options.windowsHide).toBe(true)
    expect(options.signal).toBeInstanceOf(AbortSignal)

    const commandError = Object.assign(new Error('open failed'), { code: 1 })
    execFileMock.mockImplementationOnce((_command, _args, _options, callback) => {
      callback(commandError, 'partial output', 'failure details')
    })
    await expect(openNativePath('/tmp/missing.txt', signal(), { platform: 'darwin' })).rejects.toMatchObject({
      message: 'open failed', cause: commandError, code: 1,
      stdout: 'partial output', stderr: 'failure details',
    })
  })
})