const Manifest = require('./../manifest.js')
const fs = require('fs')

/**
 *  Plugin for Manifest
 * 
 *  @author Björn Hase <me@herr-hase.wtf>
 *  @license http://opensource.org/licenses/MIT The MIT License
 *  @link https://git.node001.net/tiny-components/webpack.git
 *  
 */
class ManifestPlugin {

    constructor(options) {
        this._filename = options.filename,
        this._context = options.context
    }

    apply(compiler) {

        const pluginName = ManifestPlugin.name

        // webpack module instance can be accessed from the compiler object,
        // this ensures that correct version of the module is used
        // (do not require/import the webpack or any symbols from it directly).
        const { webpack } = compiler

        // Compilation object gives us reference to some useful constants.
        const { Compilation } = webpack

        // create manifest object
        const manifest = new Manifest(this._filename, this._context)

        compiler.hooks.afterEmit.tapAsync(pluginName, (compilation, callback) => {
            const stats = compilation.getStats().toJson()

            manifest.run(stats)
            callback()
        })
    }
}

module.exports = ManifestPlugin