/*
 * decaffeinate suggestions:
 * DS102: Remove unnecessary code created because of implicit returns
 * DS207: Consider shorter variations of null checks
 * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
 */
const request = require("request");
const Settings = require("settings-sharelatex");
const async = require("async");
const fs = require("fs");
const _ = require("underscore");
const concurentCompiles = 5;
const totalCompiles = 50;

const buildUrl = path => `http://${Settings.internal.clsi.host}:${Settings.internal.clsi.port}/${path}`;

const mainTexContent = fs.readFileSync("./bulk.tex", "utf-8");

const compileTimes = [];
let failedCount = 0;

const getAverageCompileTime = function() {
	const totalTime = _.reduce(compileTimes, (sum, time)=> sum + time
	, 0);
	return totalTime / compileTimes.length;
};

const makeRequest = function(compileNumber, callback){
	let bulkBodyCount = 7;
	let bodyContent = "";
	while (--bulkBodyCount) {
		bodyContent = (bodyContent+=mainTexContent);
	}


	const startTime = new Date();
	return request.post({
		url: buildUrl(`project/loadcompile-${compileNumber}/compile`),
		json: {
			compile: {
				resources: [{
					path: "main.tex",
					content: `\
\\documentclass{article}
\\begin{document}
${bodyContent}
\\end{document}\
`
				}
				]
			}
		}
		}, function(err, response, body){
			if (response.statusCode !== 200) {
				failedCount++;
				return callback(`compile ${compileNumber} failed`);
			}
			if (err != null) {
				failedCount++;
				return callback("failed");
			}
			const totalTime = new Date() - startTime;
			console.log(totalTime+"ms");
			compileTimes.push(totalTime);
			return callback(err);
	});
};


const jobs = _.map(__range__(1, totalCompiles, true), i=>
	cb=> makeRequest(i, cb)
);

const startTime = new Date();
async.parallelLimit(jobs, concurentCompiles, function(err){
	if (err != null) {
		console.error(err);
	}
	console.log(`total time taken = ${(new Date() - startTime)/1000}s`);
	console.log(`total compiles = ${totalCompiles}`);
	console.log(`concurent compiles = ${concurentCompiles}`);
	console.log(`average time = ${getAverageCompileTime()/1000}s`);
	console.log(`max time = ${_.max(compileTimes)/1000}s`);
	console.log(`min time = ${_.min(compileTimes)/1000}s`);
	return console.log(`total failures = ${failedCount}`);
});


function __range__(left, right, inclusive) {
  let range = [];
  let ascending = left < right;
  let end = !inclusive ? right : ascending ? right + 1 : right - 1;
  for (let i = left; ascending ? i < end : i > end; ascending ? i++ : i--) {
    range.push(i);
  }
  return range;
}