const fs = require("fs")
const md = require("../dist/markdown.node.js")
// const md = require("../build/debug/markdown.node.js")

const source = fs.readFileSync(__dirname + "/example.md")
const outbuf = md.parse(source, {
  bytes: true,
  onCodeBlock(lang, body) {
    console.log(`onCodeBlock (${lang})`)
    return html_escape(body.toString().toUpperCase())
  },
})
const outfile = __dirname + "/example.html"
console.log("write", outfile)
fs.writeFileSync(outfile, outbuf)

console.log(fs.readFileSync(outfile, "utf8"))

// mini benchmark
if (process.argv.includes("-bench")) {
  benchmark("bytes", {
    bytes: true,
  })
  benchmark("bytes + onCodeBlock", {
    bytes: true,
    onCodeBlock(lang, body) {
      return null // causes the body to be HTML-escaped & included as is
    },
  })
}

function benchmark(name, options) {
  console.log(`benchmark start ${name} (sampling ~2s of data)`)
  const timeStart = Date.now()
  const N = 1000, T = 2000
  let ntotal = 0
  while (Date.now() - timeStart < 2000) {
    for (let i = 0; i < N; i++) {
      global["dont-optimize-away"] = md.parse(source, options)
    }
    ntotal += N
  }
  const timeSpent = Date.now() - timeStart
  console.log(
    `benchmark end ${name} -- avg parse time: ` +
    `${((timeSpent / ntotal) * 1000).toFixed(1)}us`)
}

function html_escape(str) {
  return str.replace(/[&<>'"]/g, tag => ({
    '&': '&amp;','<': '&lt;','>': '&gt;',"'": '&#39;','"': '&quot;'
  }[tag]))
}