'use strict'
const path = require('path')
const config = require('../config')
const glob = require('glob');
const ExtractTextPlugin = require('extract-text-webpack-plugin')
const packageConfig = require('../package.json')
const theme = require('../src/assets/ant_theme/theme.json')
const HtmlWebpackPlugin = require('html-webpack-plugin')

exports.assetsPath = function(_path) {
    const assetsSubDirectory = process.env.NODE_ENV === 'production' ?
        config.build.assetsSubDirectory :
        config.dev.assetsSubDirectory

    return path.posix.join(assetsSubDirectory, _path)
}

exports.cssLoaders = function(options) {
    options = options || {}

    const cssLoader = {
        loader: 'css-loader',
        options: {
            sourceMap: options.sourceMap
        }
    }

    const postcssLoader = {
        loader: 'postcss-loader',
        options: {
            sourceMap: options.sourceMap
        }
    }

    // generate loader string to be used with extract text plugin
    function generateLoaders(loader, loaderOptions) {
        const loaders = options.usePostCSS ? [cssLoader, postcssLoader] : [cssLoader]
        if ('less' == loader) {
            if (loader) {
                loaders.push({
                    loader: loader + '-loader',
                    options: Object.assign({}, loaderOptions, {
                        sourceMap: options.sourceMap,
                        javascriptEnabled: true,
                        "modifyVars": theme
                    })
                })
            }
        } else {
            if (loader) {
                loaders.push({
                    loader: loader + '-loader',
                    options: Object.assign({}, loaderOptions, {
                        sourceMap: options.sourceMap
                    })
                })
            }
        }
        // Extract CSS when that option is specified
        // (which is the case during production build)
        if (options.extract) {
            return ExtractTextPlugin.extract({
                use: loaders,
                fallback: 'vue-style-loader',
                publicPath: "../../"
            })
        } else {
            return ['vue-style-loader'].concat(loaders)
        }
    }

    // https://vue-loader.vuejs.org/en/configurations/extract-css.html
    return {
        css: generateLoaders(),
        postcss: generateLoaders(),
        less: generateLoaders('less'),
        sass: generateLoaders('sass', { indentedSyntax: true }),
        scss: generateLoaders('sass'),
        stylus: generateLoaders('stylus'),
        styl: generateLoaders('stylus')
    }
}

// Generate loaders for standalone style files (outside of .vue)
exports.styleLoaders = function(options) {
    const output = []
    const loaders = exports.cssLoaders(options)

    for (const extension in loaders) {
        const loader = loaders[extension]
        output.push({
            test: new RegExp('\\.' + extension + '$'),
            use: loader
        })
    }

    return output
}

exports.createNotifierCallback = () => {
    const notifier = require('node-notifier')

    return (severity, errors) => {
        if (severity !== 'error') return

        const error = errors[0]
        const filename = error.file && error.file.split('!').pop()

        notifier.notify({
            title: packageConfig.name,
            message: severity + ': ' + error.name,
            subtitle: filename || '',
            icon: path.join(__dirname, 'logo.png')
        })
    }
}

/**
 * get entry for main entry and html template
 * @author: 
 * @date:2015-08-20
 */
exports.getEntry = () => {
    let globPath = 'src/entry/**/*.html'
    let pathDir = 'src/entry(\/|\\\\)(.*?)(\/|\\\\)html' // (\/|\\\\) 这种写法是为了兼容 windows和 mac系统目录路径的不同写法
    let files = glob.sync(globPath)
    let dirname, entries = []
    for (let i = 0; i < files.length; i++) {
        dirname = path.dirname(files[i])
        entries.push(dirname.replace(new RegExp('^' + pathDir), '$2'))
    }
    return entries
}


exports.resolve = (dir) => {
    return path.join(__dirname, '..', dir)
}

/**
 * get entry for webpack config
 * @author: 
 * @date:2015-08-20
 */
exports.addEntry = () => {
    let entryObj = {}
    exports.getEntry().forEach(item => {
        const arr = item.split('/');
        const key = arr[arr.length - 1];
        entryObj[key] = exports.resolve(`${item}/index.js`)
    })
    return entryObj
}

/**
 * webpack config for build
 * @author: 
 * @date:2015-08-20
 */

exports.getHtmlPlugins = () => {
    let result = [];
    exports.getEntry().forEach(item => {
        const arr = item.split('/');
        const key = arr[arr.length - 1];
        const one = new HtmlWebpackPlugin({
            //filename: process.env.NODE_ENV === 'testing' ? 'index.html': `${key}.html`,
            filename: `${key}.html`,
            template: exports.resolve(`${item}/index.html`),
            inject: true,
            chunks: [key, 'manifest', 'vendor', 'app'],
            minify: {
                removeComments: true,
                collapseWhitespace: false,
                removeAttributeQuotes: true
            },
            chunksSortMode: 'dependency'
        });
        result.push(one);
    })

    return result;
}


/**
 * webpack config for dev
 * @author: 
 * @date:2015-08-20
 */

exports.getDevHtmlPlugins = () => {
    let result = [];
    exports.getEntry().forEach(item => {
        const arr = item.split('/');
        const key = arr[arr.length - 1];
        const one = new HtmlWebpackPlugin({
            //filename: process.env.NODE_ENV === 'testing' ? 'index.html': `${key}.html`,
            filename: `${key}.html`,
            template: exports.resolve(`${item}/index.html`),
            inject: true,
            minify: {
                removeComments: false,
                collapseWhitespace: false,
                removeAttributeQuotes: false
            },
            chunks: [key, 'manifest', 'vendor', 'app'],
            chunksSortMode: 'dependency'
        });
        result.push(one);
    })

    return result;
}