import { describe, expect, it } from 'vitest'
import { resolveUploadEncoding } from './imageUpload'

describe('resolveUploadEncoding', () => {
  it('带透明通道的图必须输出 PNG，避免透明区域被压成实色', () => {
    const encoding = resolveUploadEncoding('home-banner', true)

    expect(encoding.outputType).toBe('image/png')
    expect(encoding.extension).toBe('png')
    expect(encoding.maxSide).toBe(1920)
    expect(encoding.quality).toBe(0.84)
  })

  it('不透明图继续用 WebP 压缩', () => {
    const encoding = resolveUploadEncoding('home-banner', false)

    expect(encoding.outputType).toBe('image/webp')
    expect(encoding.extension).toBe('webp')
  })

  it('未登记的 scene 使用兜底参数', () => {
    const encoding = resolveUploadEncoding('unknown-scene', false)

    expect(encoding.maxSide).toBe(1600)
    expect(encoding.quality).toBe(0.82)
  })

  it('头像等小尺寸场景保留各自的边长上限', () => {
    expect(resolveUploadEncoding('avatar', false).maxSide).toBe(512)
    expect(resolveUploadEncoding('qrcode', true).maxSide).toBe(2560)
  })
})