import { afterEach, describe, expect, it, vi } from 'vitest'
import { copyText } from './copyText'

describe('copyText', () => {
  afterEach(() => {
    vi.restoreAllMocks()
    vi.unstubAllGlobals()
    Reflect.deleteProperty(document, 'execCommand')
    document.querySelectorAll('textarea[aria-hidden="true"]').forEach((element) => element.remove())
  })

  it('uses the Clipboard API when it is available', async () => {
    const writeText = vi.fn().mockResolvedValue(undefined)
    vi.stubGlobal('navigator', { clipboard: { writeText } })

    await copyText('request-123')

    expect(writeText).toHaveBeenCalledWith('request-123')
  })

  it('falls back to a temporary textarea when Clipboard API access is denied', async () => {
    vi.stubGlobal('navigator', { clipboard: { writeText: vi.fn().mockRejectedValue(new Error('denied')) } })
    const execCommand = vi.fn().mockReturnValue(true)
    Object.defineProperty(document, 'execCommand', { configurable: true, value: execCommand })

    await copyText('trace-456')

    expect(execCommand).toHaveBeenCalledWith('copy')
    expect(document.querySelector('textarea[aria-hidden="true"]')).toBeNull()
  })
})