// Run "tsc" with watch, upon successful compilation run mocha tests.

var child_process = require("child_process");

var spawn = child_process.spawn;

var readline = require("readline");

var chalk = require("chalk");

var mocha = null;

var mochal = null;

var errors = 0;

function compilationStarted() {

if (mocha) {

mocha.kill('SIGINT');

}

mocha = null;

mochal = null;

errors = 0;

}

function foundErrors() {

errors ++;

}

function compilationComplete() {

if (errors) {

console.log(" " + chalk.red("TS errors. Will not start mocha."));

return;

} else {

console.log(" " + chalk.gray("Run mocha."));

}

mocha = spawn("./node_modules/.bin/mocha", ["--colors"]);

mocha.on('close', code => {

if (code) {

console.log(chalk.gray("mocha: ") + "Exited with " + code);

} else {

console.log(chalk.gray("mocha: ") + chalk.red("Exited with " + code));

}

mocha = null;

mochal = null;

});

mochal = readline.createInterface({ input: mocha.stdout });

mochal.on('line', line => {

console.log(chalk.gray('mocha: ') + line);

});

}

var tsc = spawn("./node_modules/.bin/tsc", ["--watch"]);

var tscl = readline.createInterface({ input: tsc.stdout });

tscl.on('line', line => {

console.log(chalk.gray(" tsc: ") + line);

if (line.indexOf("Compilation complete.") >= 0) {

compilationComplete();

} else if (line.indexOf("File change detected.") >= 0) {

compilationStarted();

} else if (line.indexOf(": error TS") >= 0) {

foundErrors();

}

});