/* global require, module */
module.exports = function( grunt ) {

	var BUILD_DIR    = 'build/',
	    pkg          = grunt.file.readJSON( 'package.json' ),
	    svn_username = false,
			sass         = require('node-sass');

	if ( grunt.file.exists( 'svn-username' ) ) {

		svn_username = grunt.file.read( 'svn-username' ).trim();

	}

	require( 'matchdep' ).filterDev( 'grunt-*' ).forEach( grunt.loadNpmTasks );

	// Project configuration.
	grunt.initConfig( {

		pkg: pkg,

		_watch: {
			sass: {
				files: [ '*.scss' ],
				options: {
					cwd: 'assets/css',
					nospawn: true
				},
				tasks: [ 'sass', 'postcss' ]
			},
			css: {
				files: [ '*.css', '!*.min.css' ],
				options: {
					cwd: 'assets/css',
					nospawn: true
				},
				tasks: [ 'cssmin' ]
			},
			uglify: {
				files: [ '*.js', '!*.js.css' ],
				options: {
					cwd: 'assets/js',
					nospawn: true
				},
				tasks: [ 'uglify' ]
			}
		},

		browserify: {
			dist: {
				files: {
					'assets/js/stock-photos.js': [ 'assets/js/stock-photos.manifest.js' ]
				}
			}
		},

		clean: {
			build: [ BUILD_DIR + '*' ],
			options: {
				force: true
			}
		},

		replace: {
			version_php: {
				src: [
					'**/*.php',
					'!vendor/**',
					'!dev-lib/*'
				],
				overwrite: true,
				replacements: [ {
					from: /Version:(\s*?)[a-zA-Z0-9\.\-\+]+$/m,
					to: 'Version:$1' + pkg.version
				}, {
					from: /@version(\s*?)[a-zA-Z0-9\.\-\+]+$/m,
					to: '@version$1' + pkg.version
				}, {
					from: /@since(.*?)NEXT/mg,
					to: '@since$1' + pkg.version
				}, {
					from: /VERSION(\s*?)=(\s*?['"])[a-zA-Z0-9\.\-\+]+/mg,
					to: 'VERSION$1=$2' + pkg.version
				} ]
			},
			version_readme: {
				src: 'readme.*',
				overwrite: true,
				replacements: [ {
					from: /^(\*\*|)Stable tag:(\*\*|)(\s*?)[a-zA-Z0-9.-]+(\s*?)$/mi,
					to: '$1Stable tag:$2$3<%= pkg.version %>$4'
				} ]
			},
			pot:{
				src: 'languages/' + pkg.name + '.pot',
				overwrite: true,
				replacements: [ {
					from: 'charset=CHARSET',
					to: 'charset=UTF-8'
				} ]
			}
		},

		copy: {
			files: {
				cwd: '.',
				expand: true,
				src: [
					pkg.name + '.php',
					'readme.txt',
					'languages/*.mo',
					'includes/**',
					'assets/**'
				],
				dest: BUILD_DIR
			}
		},

		cssmin: {
			options: {
				shorthandCompacting: false,
				roundingPrecision: -1,
				processImport: false
			},
			dist: {
				files: [
					{
						expand: true,
						cwd: 'assets/css',
						src: [ '*.css', '!*.min.css' ],
						dest: 'assets/css',
						ext: '.min.css'
					}
				]
			}
		},

		postcss: {
			options: {
				map: true,
				processors: [
					require('autoprefixer')(),
				]
			},
			dist: {
				src: 'assets/css/*.css'
			}
		},

		po2mo: {
			files: {
				src: 'languages/*.po',
				expand: true
			}
		},

		pot: {
			options: {
				omit_header: false,
				text_domain: pkg.name,
				encoding: 'UTF-8',
				dest: 'languages/',
				keywords: [ '__', '_e', '__ngettext:1,2', '_n:1,2', '__ngettext_noop:1,2', '_n_noop:1,2', '_c', '_nc:4c,1,2', '_x:1,2c', '_nx:4c,1,2', '_nx_noop:4c,1,2', '_ex:1,2c', 'esc_attr__', 'esc_attr_e', 'esc_attr_x:1,2c', 'esc_html__', 'esc_html_e', 'esc_html_x:1,2c' ],
				msgmerge: true
			},
			files: {
				src: [ 'includes/*.php', pkg.name + '.php' ],
				expand: true
			}
		},

		sass: {
			options: {
				implementation: sass,
				sourceMap: true
			},
			dist: {
				expand: true,
				cwd: 'assets/css',
				dest: 'assets/css',
				ext: '.css',
				src: [ '*.scss' ],
				options: {
					outputStyle: 'expanded'
				}
			}
		},

		uglify: {
			options: {
				ASCIIOnly: true
			},
			core: {
				expand: true,
				cwd: 'assets/js',
				dest: 'assets/js',
				ext: '.min.js',
				src: [ '*.js', '!*.min.js', '!*.manifest.js' ]
			}
		},

		wp_deploy: {
			deploy: {
				options: {
					plugin_slug: pkg.name,
					build_dir: BUILD_DIR,
					assets_dir: 'wp-org-assets',
					svn_user: svn_username
				}
			}
		}

	} );

	// Default task(s).
	grunt.registerTask( 'default',    [ 'sass', 'postcss', 'cssmin', 'browserify', 'uglify' ] );
	grunt.registerTask( 'version',    [ 'replace' ] );
	grunt.registerTask( 'build',      [ 'default', 'version', 'clean', 'copy' ] );
	grunt.registerTask( 'deploy',     [ 'build', 'wp_deploy', 'clean' ] );
	grunt.registerTask( 'update-pot', [ 'pot', 'replace:pot', 'po2mo' ] );

	grunt.renameTask( 'watch', '_watch' );

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

		if ( ! this.args.length || this.args.indexOf( 'browserify' ) > -1 ) {

			grunt.config( 'browserify.options', {
				browserifyOptions: {
					debug: true
				},
				watch: true
			} );

			grunt.task.run( 'browserify' );

		}

		grunt.task.run( '_' + this.nameArgs );

	} );

};