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

"use strict";

const RuntimeGlobals = require("../RuntimeGlobals");

exports.handleDependencyBase = (depBase, module, runtimeRequirements) => {
	let base = undefined;
	let type;
	switch (depBase) {
		case "exports":
			runtimeRequirements.add(RuntimeGlobals.exports);
			base = module.exportsArgument;
			type = "expression";
			break;
		case "module.exports":
			runtimeRequirements.add(RuntimeGlobals.module);
			base = `${module.moduleArgument}.exports`;
			type = "expression";
			break;
		case "this":
			runtimeRequirements.add(RuntimeGlobals.thisAsExports);
			base = "this";
			type = "expression";
			break;
		case "Object.defineProperty(exports)":
			runtimeRequirements.add(RuntimeGlobals.exports);
			base = module.exportsArgument;
			type = "Object.defineProperty";
			break;
		case "Object.defineProperty(module.exports)":
			runtimeRequirements.add(RuntimeGlobals.module);
			base = `${module.moduleArgument}.exports`;
			type = "Object.defineProperty";
			break;
		case "Object.defineProperty(this)":
			runtimeRequirements.add(RuntimeGlobals.thisAsExports);
			base = "this";
			type = "Object.defineProperty";
			break;
		default:
			throw new Error(`Unsupported base ${depBase}`);
	}

	return [type, base];
};