var path = require('path');

var underscore = require('underscore');
var webpack = require('webpack');

var defs = require('./package.defs.js');

var distWebpackConfig = require('./webpack.dist.js');
var exampleWebpackConfig = require('./webpack.example.js');

module.exports = function (grunt) {
  grunt.loadNpmTasks('grunt-contrib-clean');
  grunt.loadNpmTasks('grunt-contrib-sass');
  grunt.loadNpmTasks('grunt-karma');
  grunt.loadNpmTasks('grunt-webpack');
  grunt.loadNpmTasks('gruntify-eslint');

  grunt.initConfig({
    clean: {
      options: {
        force: true
      },
      all: [
        defs.LIB_DIR,
        path.resolve(defs.EXAMPLE_ASSETS_DIR, 'example.js'),
        path.resolve(defs.EXAMPLE_ASSETS_DIR, 'example.js.map'),
        path.resolve(defs.EXAMPLE_ASSETS_DIR, 'example.css'),
        path.resolve(defs.EXAMPLE_ASSETS_DIR, 'example.css.map')
      ]
    },
    eslint: {
      example: {
        src: ['./example/example.js']
      },
      sources: {
        src: ['./src/**/*.js']
      },
      tests: {
        src: ['./tests/**/*.spec.js']
      },
      tools: {
        src: [
          './Gruntfile.js', './karma.conf.js', './package.defs.js',
          './webpack.dist.js', './webpack.example.js'
        ]
      }
    },
    karma: {
      options: {
        configFile: 'karma.conf.js'
      },
      dist: {
        browsers: ['ChromiumHeadless'],
        reporters: ['progress'],
        singleRun: true,
        webpackMiddleware: {
          noInfo: true,
          stats: 'errors-only'
        }
      }
    },
    sass: {
      dist: {
        src: [path.resolve(defs.SRC_DIR, 'Popup.scss')],
        dest: path.resolve(defs.LIB_DIR, defs.CSS_FILENAME_DIST),
        options: {
          precision: 10,
          sourcemap: 'auto',
          style: 'compressed'
        }
      },
      example: {
        src: [path.resolve(defs.EXAMPLE_DIR, 'example.scss')],
        dest: path.resolve(defs.EXAMPLE_ASSETS_DIR, 'example.css'),
        options: {
          precision: 10,
          sourcemap: 'auto',
          style: 'expanded'
        }
      }
    },
    webpack: {
      dist: distWebpackConfig,
      example: exampleWebpackConfig
    }
  });

  grunt.registerTask('dist', [
    'clean', 'eslint', 'karma:dist', 'sass:dist', 'webpack:dist'
  ]);

  grunt.registerTask('example', [
    'clean', 'sass:example', 'webpack:dist', 'webpack:example'
  ]);
};