import { test } from 'node:test'
import assert from 'node:assert/strict'
import { quantize, countBeads, validateGrid, cropRect } from '../src/core/pattern.ts'
let colors = [{ code: 'B', name: '黑', hex: '#000000', location: '', available: true }, { code: 'W', name: '白', hex: '#ffffff', location: '', available: true }]
test('透明像素不是白色豆；统计仅包括实际豆子', () => {
  let cells = quantize(new Uint8ClampedArray([255,255,255,255, 0,0,0,255, 255,255,255,0]), colors)
  assert.deepEqual(cells, ['W','B',null])
  assert.deepEqual(countBeads(cells), { W: 1, B: 1 })
})
test('色板量化使用最近的可用颜色', () => {
  assert.deepEqual(quantize(new Uint8ClampedArray([230,230,230,255]), colors), ['W'])
  assert.throws(() => quantize(new Uint8ClampedArray([0,0,0,255]), []), /色板/)
})
test('非法尺寸、未知色号、空图不能保存', () => {
  assert.throws(() => validateGrid(2, 2, ['W'], colors), /网格/)
  assert.throws(() => validateGrid(1, 1, ['X'], colors), /色号/)
  assert.throws(() => validateGrid(1, 1, [null], colors), /空/)
  assert.doesNotThrow(() => validateGrid(1, 1, ['W'], colors))
})
test('中心裁剪保持目标比例', () => {
  assert.deepEqual(cropRect(400,200,1), { x:100,y:0,width:200,height:200 })
  assert.deepEqual(cropRect(200,400,1), { x:0,y:100,width:200,height:200 })
})