#!/usr/bin/env node

const fs = require('fs')
const path = require('path')

const { wrapTextByChars } = require('../miniprogram/utils/core/text-layout')
const { generateSvgFromFont } = require('../miniprogram/utils/core/svg-builder')
const opentype = require('../frontend/node_modules/opentype.js/dist/opentype.js')

function findFirstFontFile(rootDir) {
  const entries = fs.readdirSync(rootDir, { withFileTypes: true })
  for (const entry of entries) {
    const fullPath = path.join(rootDir, entry.name)
    if (entry.isDirectory()) {
      const nested = findFirstFontFile(fullPath)
      if (nested) return nested
      continue
    }

    if (/\.(ttf|otf)$/i.test(entry.name)) {
      return fullPath
    }
  }
  return null
}

function assert(condition, message) {
  if (!condition) {
    throw new Error(message)
  }
}

function run() {
  console.log('开始执行小程序核心模块测试...')

  const wrapped = wrapTextByChars('123456', 2)
  assert(wrapped === '12\n34\n56', 'wrapTextByChars 结果不符合预期')

  const fontFile = findFirstFontFile(path.join(__dirname, '..', 'frontend', 'public', 'fonts'))
  assert(fontFile, '未找到可用字体文件')

  const buffer = fs.readFileSync(fontFile)
  const font = opentype.parse(buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength))

  const result = generateSvgFromFont({
    text: '星程字体转换',
    font,
    fontSize: 120,
    fillColor: '#000000',
    letterSpacing: 0,
  })

  assert(typeof result.svg === 'string' && result.svg.includes('<svg'), 'SVG 内容无效')
  assert(result.svg.includes('<path'), 'SVG 未生成路径')
  assert(result.width > 0 && result.height > 0, 'SVG 尺寸计算无效')

  console.log('小程序核心模块测试通过。')
}

run()