const mockExistsSync = jest.fn()
jest.mock('fs', () => ({ existsSync: (...args: unknown[]) => mockExistsSync(...args) }))

import { buildYtdlpCommand } from '../ytdlp'

function setPlatform(platform: NodeJS.Platform) {
  Object.defineProperty(process, 'platform', { value: platform })
}

describe('buildYtdlpCommand', () => {
  const originalPlatform = process.platform

  afterEach(() => {
    setPlatform(originalPlatform)
    mockExistsSync.mockReset()
  })

  it('runs the bundled binary directly on Linux', () => {
    setPlatform('linux')
    mockExistsSync.mockReturnValue(true)
    const { command, args } = buildYtdlpCommand(['-J', 'https://x.test'])
    expect(command).toContain('yt-dlp')
    expect(args).toEqual(['-J', 'https://x.test'])
  })

  it('runs the bundled binary through python on Windows', () => {
    setPlatform('win32')
    mockExistsSync.mockReturnValue(true)
    const { command, args } = buildYtdlpCommand(['-J', 'https://x.test'])
    expect(command).toBe('python')
    expect(args[0]).toContain('yt-dlp')
    expect(args.slice(1)).toEqual(['-J', 'https://x.test'])
  })

  it('runs a system-wide yt-dlp directly on Windows when no bundled binary exists', () => {
    setPlatform('win32')
    mockExistsSync.mockReturnValue(false)
    const { command, args } = buildYtdlpCommand(['-J', 'https://x.test'])
    expect(command).toBe('yt-dlp')
    expect(args).toEqual(['-J', 'https://x.test'])
  })

  it('runs a system-wide yt-dlp directly on Linux when no bundled binary exists', () => {
    setPlatform('linux')
    mockExistsSync.mockReturnValue(false)
    const { command, args } = buildYtdlpCommand(['-J', 'https://x.test'])
    expect(command).toBe('yt-dlp')
    expect(args).toEqual(['-J', 'https://x.test'])
  })
})