var fs = require('fs');

var path = require('path');

module.exports = function (grunt) {

grunt.registerTask('generator', function () {

var config = grunt.config('generator.settings');

var mixinsDir = path.resolve(__dirname, '..', 'mixins');

// Check whether mixins folder exists

if (!fs.existsSync(mixinsDir)) {

grunt.fail.fatal('Mixins folder does not exist. Try to install the whole workflow again,\nor send issue on github.');

}

// Check whether concrete mixin folder exists

if (fs.existsSync(path.resolve(mixinsDir, config.mixin_css_name))) {

grunt.fail.fatal(config.mixin_css_name + ' folder already exists. Choose another name.');

}

// Create folder

var folder = fs.mkdirSync(path.resolve(mixinsDir, config.mixin_css_name));

grunt.log.ok('Folder created – DONE');

// Create files inside folder

var srcDir = path.resolve(__dirname, 'src');

// Check whether mixin template exists

if (fs.existsSync(path.resolve(srcDir, 'mixin-template.js'))) {

grunt.fail.fatal('Mixin template does not exist. Try to install the whole workflow again,\nor send issue on github.');

}

function fileCreator(mixin_name, data, exported, done) {

done = done || function(){};

if (mixin_name) {

var mixinTemplatePath = path.resolve(srcDir, mixin_name + '.js');

var mixinFile = fs.readFileSync(mixinTemplatePath, 'utf8');

mixinFile = mixinFile.replace(/{{\s*(\w+\s*\|?\s*\w+)\s*}}/g, function (match, variable) {

return (!(config[variable] instanceof Array) && (config[variable])) || (JSON.stringify(data[variable]).replace(/"/g, '\''));

});

}

fs.writeFileSync(path.resolve(mixinsDir, exported.path, exported.file), mixinFile || '##');

done();

}

fileCreator('mixin-template', config, {

path: config.mixin_css_name,

file: config.mixin_css_name + '.js'

}, function () {

grunt.log.ok('Mixin file created – DONE');

});

fileCreator('test-template', config, {

path: config.mixin_css_name,

file: 'test.js'

}, function () {

grunt.log.ok('Test file created – DONE');

});

fileCreator('documentation-template', config, {

path: config.mixin_css_name,

file: config.mixin_css_name + '.md'

}, function () {

grunt.log.ok('Document file created – DONE');

});

});

};