import { describe, it, expect } from 'vitest'
import { render, fireEvent } from '@testing-library/react'
import { Canvas } from '@/components/wysiwyg/Canvas'
import type { Frame } from '@/lib/wysiwyg/schema'

function makeFrame(): Frame {
  return {
    id: 'f1',
    width: 320,
    height: 200,
    background: '#ffffff',
    layers: [
      { id: 'l1', name: 'L1', visible: true, locked: false, objects: [
        { id: 'o1', type: 'image', x: 101, y: 99, width: 50, height: 40, rotate: 0, zIndex: 0, props: { src: 'x', alt: '' } },
      ] },
    ],
  }
}

describe('Canvas guidelines during drag with snap', () => {
  it('shows x/y guide lines snapping to 8px grid while dragging', () => {
    const frame = makeFrame()
    const { getByTestId, queryByTestId } = render(<Canvas frame={frame} />)
    const canvas = getByTestId('wysiwyg-canvas')
    const obj = getByTestId('obj-o1')

    expect(queryByTestId('guide-x')).toBeNull()
    expect(queryByTestId('guide-y')).toBeNull()

    fireEvent.mouseDown(obj, { clientX: 200, clientY: 150 })
    fireEvent.mouseMove(canvas, { clientX: 203, clientY: 151 })

    expect(getByTestId('guide-x')).toBeInTheDocument()
    expect(getByTestId('guide-y')).toBeInTheDocument()

    fireEvent.mouseUp(canvas)

    expect(queryByTestId('guide-x')).toBeNull()
    expect(queryByTestId('guide-y')).toBeNull()
  })
})