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

function makeFrame(): Frame {
  return {
    id: 'f',
    width: 400,
    height: 300,
    background: '#111111',
    layers: [
      {
        id: 'base',
        name: 'Base',
        visible: true,
        locked: false,
        objects: [
          { id: 'o1', type: 'text', x: 40, y: 40, width: 80, height: 40, rotate: 0, zIndex: 0, props: { text: 'A', fontSize: 16, color: '#fff' } },
          { id: 'o2', type: 'text', x: 200, y: 40, width: 80, height: 40, rotate: 0, zIndex: 1, props: { text: 'B', fontSize: 16, color: '#fff' } },
        ],
      },
    ],
  }
}

describe('Canvas resize behavior (단일 선택 UX)', () => {
  it('단일 선택일 때 우하단 핸들 드래그로만 크기가 변하고, 다른 객체는 그대로 유지된다', () => {
    const frame = makeFrame()
    render(<Canvas frame={frame} />)
    const canvas = screen.getByTestId('wysiwyg-canvas')
    const obj1 = screen.getByTestId('obj-o1') as HTMLDivElement
    const obj2 = screen.getByTestId('obj-o2') as HTMLDivElement

    // o1만 선택
    fireEvent.mouseDown(obj1, { clientX: 50, clientY: 50 })

    const handle = screen.getByTestId('resize-handle-o1')
    // 우하단 방향으로 드래그 → width/height 증가
    fireEvent.mouseDown(handle, { clientX: 120, clientY: 80 })
    fireEvent.mouseMove(canvas, { clientX: 180, clientY: 140 })
    fireEvent.mouseUp(canvas)

    const w1 = parseInt(obj1.style.width, 10)
    const h1 = parseInt(obj1.style.height, 10)
    expect(w1).toBeGreaterThan(80)
    expect(h1).toBeGreaterThan(40)

    // o2는 변하지 않는다
    const w2 = parseInt(obj2.style.width, 10)
    const h2 = parseInt(obj2.style.height, 10)
    expect(w2).toBe(80)
    expect(h2).toBe(40)

    // 반대 방향으로 드래그하면 줄어든다
    const handle2 = screen.getByTestId('resize-handle-o1')
    fireEvent.mouseDown(handle2, { clientX: 180, clientY: 140 })
    fireEvent.mouseMove(canvas, { clientX: 130, clientY: 100 })
    fireEvent.mouseUp(canvas)
    const w1b = parseInt(obj1.style.width, 10)
    const h1b = parseInt(obj1.style.height, 10)
    expect(w1b).toBeLessThan(w1)
    expect(h1b).toBeLessThan(h1)
  })
})