var path = require('path');

var getFile = require('./get-file');

var compare = require('./compare-solution');

module.exports = function createProblem(dirname) {

var exports = {};

var problemName = dirname.split(path.sep);

problemName = problemName[problemName.length-1];

exports.init = function (workshopper) {

var postfix = workshopper.lang === 'en' ? '' : '_' + workshopper.lang;

this.problem = getFile(path.join(dirname, 'problem' + postfix + '.md'));

this.solution = getFile(path.join(dirname, 'solution' + postfix + '.md'));

this.solutionPath = path.resolve(dirname, "../../solutions", problemName, "index.js");

this.troubleshootingPath = path.join(dirname, '../../troubleshooting' + postfix + '.md');

}

exports.verify = function (args, cb) {

var attemptPath = path.resolve(process.cwd(), args[0]);

compare(this.solutionPath, attemptPath, function(match, obj) {

if(match) {

return cb(true);

}

if(!obj) {

// An error occured, we've already printed an error

return;

}

var message = getFile(this.troubleshootingPath);

message = message.replace(/%solution%/g, obj.solution);

message = message.replace(/%attempt%/g, obj.attempt);

message = message.replace(/%diff%/g, obj.diff);

message = message.replace(/%filename%/g, args[0]);

exports.fail = message;

cb(false);

}.bind(this));

};

exports.run = function (args) {

require(path.resolve(process.cwd(), args[0]));

};

return exports;

}