"use strict";

/* eslint-env browser, jquery */

let Runner = require("./runner.js");
let benchmarks = require("./benchmarks.js");

$("#run").click(() => {
  // Results Table Manipulation

  let resultsTable = $("#results-table");

  function appendResult(klass, title, url, inputSize, parseTime) {
    const KB = 1024;
    const MS_IN_S = 1000;

    resultsTable.append(
        "<tr class='" + klass + "'>"
      +   "<td class='title'>"
      +     (url !== null ? "<a href='" + url + "'>" : "")
      +       title
      +     (url !== null ? "</a>" : "")
      +   "</td>"
      +   "<td class='input-size'>"
      +     "<span class='value'>"
      +       (inputSize / KB).toFixed(2)
      +     "</span>"
      +     "&nbsp;<span class='unit'>kB</span>"
      +   "</td>"
      +   "<td class='parse-time'>"
      +     "<span class='value'>"
      +       parseTime.toFixed(2)
      +     "</span>"
      +     "&nbsp;<span class='unit'>ms</span>"
      +   "</td>"
      +   "<td class='parse-speed'>"
      +     "<span class='value'>"
      +       ((inputSize / KB) / (parseTime / MS_IN_S)).toFixed(2)
      +     "</span>"
      +     "&nbsp;<span class='unit'>kB/s</span>"
      +   "</td>"
      + "</tr>"
    );
  }

  // Main

  // Each input is parsed multiple times and the results are averaged. We
  // do this for two reasons:
  //
  //   1. To warm up the interpreter (PEG.js-generated parsers will be
  //      most likely used repeatedly, so it makes sense to measure
  //      performance after warming up).
  //
  //   2. To minimize random errors.

  let runCount = parseInt($("#run-count").val(), 10);
  let options = {
    cache: $("#cache").is(":checked"),
    optimize: $("#optimize").val()
  };

  if (isNaN(runCount) || runCount <= 0) {
    alert("Number of runs must be a positive integer.");

    return;
  }

  Runner.run(benchmarks, runCount, options, {
    readFile(file) {
      return $.ajax({
        type: "GET",
        url: "benchmark/" + file,
        dataType: "text",
        async: false
      }).responseText;
    },

    testStart() {
      // Nothing to do.
    },

    testFinish(benchmark, test, inputSize, parseTime) {
      appendResult(
        "individual",
        test.title,
        "benchmark/" + benchmark.id + "/" + test.file,
        inputSize,
        parseTime
      );
    },

    benchmarkStart(benchmark) {
      resultsTable.append(
          "<tr class='heading'><th colspan='4'>"
        +   "<a href='../../examples/" + benchmark.id + ".pegjs'>"
        +     benchmark.title
        +   "</a>"
        + "</th></tr>"
      );
    },

    benchmarkFinish(benchmark, inputSize, parseTime) {
      appendResult(
        "benchmark-total",
        benchmark.title + " total",
        null,
        inputSize,
        parseTime
      );
    },

    start() {
      $("#run-count, #cache, #run").attr("disabled", "disabled");

      resultsTable.show();
      $("#results-table tr").slice(1).remove();
    },

    finish(inputSize, parseTime) {
      appendResult(
        "total",
        "Total",
        null,
        inputSize,
        parseTime
      );

      $.scrollTo("max", { axis: "y", duration: 500 });

      $("#run-count, #cache, #run").removeAttr("disabled");
    }
  });
});

$(document).ready(() => {
  $("#run").focus();
});