import { describe, it, expect, vi } from 'vitest'
import { render, screen } from '@testing-library/react'
import userEvent from '@testing-library/user-event'
import { Button } from './button'

describe('Button', () => {
  it('renders with default variant', () => {
    render(<Button>Click me</Button>)
    const button = screen.getByRole('button', { name: 'Click me' })
    expect(button).toBeInTheDocument()
  })

  it('renders as disabled', () => {
    render(<Button disabled>Disabled</Button>)
    const button = screen.getByRole('button', { name: 'Disabled' })
    expect(button).toBeDisabled()
  })

  it('handles click events', async () => {
    const user = userEvent.setup()
    const onClick = vi.fn()
    render(<Button onClick={onClick}>Click</Button>)
    await user.click(screen.getByRole('button'))
    expect(onClick).toHaveBeenCalledTimes(1)
  })

  it('does not fire click when disabled', async () => {
    const user = userEvent.setup()
    const onClick = vi.fn()
    render(<Button disabled onClick={onClick}>Click</Button>)
    await user.click(screen.getByRole('button'))
    expect(onClick).not.toHaveBeenCalled()
  })

  it('renders with destructive variant', () => {
    render(<Button variant="destructive">Delete</Button>)
    const button = screen.getByRole('button', { name: 'Delete' })
    expect(button.className).toContain('bg-destructive')
  })

  it('renders with outline variant', () => {
    render(<Button variant="outline">Outline</Button>)
    const button = screen.getByRole('button', { name: 'Outline' })
    expect(button.className).toContain('border')
  })

  it('renders with different sizes', () => {
    const { rerender } = render(<Button size="sm">Small</Button>)
    expect(screen.getByRole('button').className).toContain('h-9')

    rerender(<Button size="lg">Large</Button>)
    expect(screen.getByRole('button').className).toContain('h-11')
  })

  it('renders as child with asChild prop', () => {
    render(
      <Button asChild>
        <a href="/test">Link</a>
      </Button>
    )
    const link = screen.getByRole('link', { name: 'Link' })
    expect(link).toBeInTheDocument()
    expect(link.tagName).toBe('A')
  })

  it('applies custom className', () => {
    render(<Button className="custom-class">Custom</Button>)
    expect(screen.getByRole('button').className).toContain('custom-class')
  })
})