/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
"use strict";

const MultiEntryDependency = require("./dependencies/MultiEntryDependency");
const SingleEntryDependency = require("./dependencies/SingleEntryDependency");
const MultiModuleFactory = require("./MultiModuleFactory");

module.exports = class MultiEntryPlugin {
	constructor(context, entries, name) {
		this.context = context;
		this.entries = entries;
		this.name = name;
	}

	apply(compiler) {
		compiler.hooks.compilation.tap("MultiEntryPlugin", (compilation, {
			normalModuleFactory
		}) => {
			const multiModuleFactory = new MultiModuleFactory();

			compilation.dependencyFactories.set(MultiEntryDependency, multiModuleFactory);
			compilation.dependencyFactories.set(SingleEntryDependency, normalModuleFactory);
		});

		compiler.hooks.make.tapAsync("MultiEntryPlugin", (compilation, callback) => {
			const {
				context,
				entries,
				name
			} = this;

			const dep = MultiEntryPlugin.createDependency(entries, name);
			compilation.addEntry(context, dep, name, callback);
		});
	}

	static createDependency(entries, name) {
		return new MultiEntryDependency(entries.map((e, idx) => {
			const dep = new SingleEntryDependency(e);
			// Because entrypoints are not dependencies found in an
			// existing module, we give it a synthetic id
			dep.loc = `${name}:${100000 + idx}`;
			return dep;
		}), name);
	}
};