module.exports = function (grunt) {
    'use strict';
    // Configuration
    grunt.initConfig({
        pkg: grunt.file.readJSON('package.json'),
        compass: {
            config: 'config.rb'
        },
        jshint: {
            options: grunt.file.readJSON('.jshintrc'),
            files: ['src/js/**/*.js']
        },
        uglify: {
            options: {
                sourceMap: function (script) {
                    return 'src/source_maps/' + script + '.map';
                },
                sourceMapRoot: '/whitemill/',
                // in a live environment when website is in www.[name].com, use the below sourceMapRoot if sourceMaps are still needed
                //sourceMapRoot: '/',
                sourceMappingURL: function (script) {
                    //return '../src/source_maps/' + script.replace(/^.+\//, "") + '.map';
                    return '../src/source_maps/' + script + '.map';
                }
            },
            src: {
                files: [{
                    expand: true,
                    cwd: 'src/js/',
                    src: ['**/*.js', '!rjs/**/*.js'],
                    dest: 'js/',
                    //ext: '.min.js',    //commenting out for now
                }]
            },
            modernizr: {
                files: [{                   // Dictionary of files
                    expand: true,           // Enable dynamic expansion.
                    cwd: 'bower_components/modernizr',         // Src matches are relative to this path.
                    src: ['**/*.js', '!**/grunt*', '!test/**/*.js'],      // Actual pattern(s) to match.
                    dest: 'js/libs/'           // Destination path prefix.
                    //ext: '.js'         // Dest filepaths will have this extension.
                }],
                options: {
                    sourceMappingURL: function (script) {
                        //return '../src/source_maps/' + script.replace(/^.+\//, "") + '.map';
                        return '../../src/source_maps/' + script + '.map';
                    }
                }
            },
            respond: {
                files: [{                   // Dictionary of files
                    expand: true,           // Enable dynamic expansion.
                    cwd: 'bower_components/respond',         // Src matches are relative to this path.
                    src: ['respond.src.js', '!test/**/*.js', '!cross-domain/**/*.js'],      // Actual pattern(s) to match.
                    dest: 'js/libs/'           // Destination path prefix.
                    //ext: '.js'         // Dest filepaths will have this extension.
                }],
                options: {
                    sourceMappingURL: function (script) {
                        //return '../src/source_maps/' + script.replace(/^.+\//, "") + '.map';
                        return '../../src/source_maps/' + script + '.map';
                    }
                }
            },
            requirejs: {
                files: [{                   // Dictionary of files
                    expand: true,           // Enable dynamic expansion.
                    cwd: 'bower_components/requirejs',         // Src matches are relative to this path.
                    src: ['require.js'],      // Actual pattern(s) to match.
                    dest: 'js/libs/'           // Destination path prefix.
                    //ext: '.js'         // Dest filepaths will have this extension.
                }],
                options: {
                    sourceMappingURL: function (script) {
                        //return '../src/source_maps/' + script.replace(/^.+\//, "") + '.map';
                        return '../../src/source_maps/' + script + '.map';
                    }
                }
            }
        },
        requirejs: {
            compile: {
                options: {
                    mainConfigFile: 'src/js/rjs/config.js'
                    //name: 'main',
                    //baseUrl: 'src/js/',
                    //out: 'js/requirejs.js'
                    //baseUrl: 'js',
                    //paths: {
                    //    jquery: 'https://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min',
                    //}
                }
            }
        },
        svgmin: {                                           // Task
            options: {                                      // Configuration that will be passed directly to SVGO
                plugins: [{
                    removeViewBox: false
                }]
            },
            dist: {                                         // Target
                files: [{                   // Dictionary of files
                    expand: true,           // Enable dynamic expansion.
                    cwd: 'src/svg',         // Src matches are relative to this path.
                    src: ['**/*.svg'],      // Actual pattern(s) to match.
                    dest: 'img/',           // Destination path prefix.
                    //ext: '.svg'         // Dest filepaths will have this extension.
                }]
            }
        },
        smushit: {
            path: {
                src: 'img/'
            }
        },
        watch: {
            options: {
                nospawn: true
            },
            js: {
                files: ['src/js/**/*.js', '!src/js/rjs/**/*.js'],
                tasks: ['uglify:src']
            },
            requirejs: {
                files: ['src/js/rjs/**/*.js'],
                tasks: ['requirejs']
            },
            svg: {
                files: ['src/svg/**/*.svg'],
                tasks: ['svgmin']
            },
            img: {
                files: ['img/**/*.png', 'img/**/*.jpg'],
                tasks: ['smushit']
            },
            sass: {
                files: ['src/sass/**/*.scss'],
                tasks: ['compass'],
                options: {
                    nospawn: true
                }
            },
        }

    });
    // Plugins
    grunt.loadNpmTasks('grunt-contrib-jshint');
    grunt.loadNpmTasks('grunt-contrib-uglify');
    grunt.loadNpmTasks('grunt-contrib-compass');
    grunt.loadNpmTasks('grunt-contrib-watch');
    grunt.loadNpmTasks('grunt-svgmin');
    grunt.loadNpmTasks('grunt-smushit');

    grunt.loadNpmTasks('grunt-contrib-requirejs');

    // Tasks
    grunt.registerTask('default', ['jshint', 'uglify', 'requirejs']);
    grunt.registerTask('image', ['smushit', 'svgmin']);
    grunt.event.on('watch', function (action, filepath, target) {
        //change the ource and destination in the uglify task at run time so that it affects the changed file only
        var destFilePath;
        if (target === 'js') {
            destFilePath = filepath.replace(/src\/(.+)$/, '$1');
            grunt.config('uglify.src.src', filepath);
            grunt.config('uglify.src.dest', destFilePath);
        } else if (target === 'svg') {
            destFilePath = filepath.replace(/src\/svg\/(.+)$/, 'img/$1');
            grunt.config('svgmin.dist.src', filepath);
            grunt.config('svgmin.dist.dest', destFilePath);

        } else if (target === 'markdown') {
            destFilePath = filepath.replace(/src\/markdown\/([^.]+).+$/, 'application/views/pages/$1.php');
            grunt.config('markdown.dist.src', filepath);
            grunt.config('markdown.dist.dest', destFilePath);

        } else if (target === 'img') {
            grunt.config('smushit.path.src', filepath);
        }
    });
};