const path = require('path');
const HtmlWebpackPlugin = require('html-webpack-plugin');
const webpack = require('webpack');
const cesiumSource = './node_modules/cesium/Source';
// const cesiumSource = './node_modules/cesium/Source';
const cesiumWorkers = '../Build/Cesium/Workers';
// const cesiumWorkers = './node_modules/cesium/Build/Cesium/Workers';
const CopywebpackPlugin = require('copy-webpack-plugin');

module.exports = {
    mode:'production',//development/production
	context: __dirname,
	entry: {
		app: './src/index.js'
	},
	output: {
		filename: '[name].js',
        path: path.resolve(__dirname, 'dist'),
        sourcePrefix: ''
    },
    amd: {
        // Enable webpack-friendly use of require in Cesium
        toUrlUndefined: true
    },
    node: {
        // Resolve node module use of fs
        fs: 'empty'
    },
    resolve: {
		alias: {
			// Cesium module name
			cesium: path.resolve(__dirname, cesiumSource)
		}
	},
    module: {
        rules: [{
            test: /\.css$/,
            use: ['style-loader', {
                loader: 'css-loader',
                options: {
                    // minify loaded css
                    minimize: true
                }
            }]
        }, {
            test: /\.(png|gif|jpg|jpeg|svg|xml|json)$/,
            use: ['url-loader']
        }]
    },
    plugins: [
        new HtmlWebpackPlugin({template: 'src/index.html'}),
        // Copy Cesium Assets, Widgets, and Workers to a static directory
        new CopywebpackPlugin([ { from: path.join(cesiumSource, cesiumWorkers), to: 'Workers' } ]),
        new CopywebpackPlugin([ { from: path.join(cesiumSource, 'Assets'), to: 'Assets' } ]),
        new CopywebpackPlugin([ { from: path.join(cesiumSource, 'Widgets'), to: 'Widgets' } ]),
        new webpack.DefinePlugin({
            // Define relative base path in cesium for loading assets
            CESIUM_BASE_URL: JSON.stringify('')
        })
    ]
    
};