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

const Hook = require("./Hook");
const HookCodeFactory = require("./HookCodeFactory");

class AsyncParallelBailHookCodeFactory extends HookCodeFactory {
	content({ onError, onResult, onDone }) {
		let code = "";
		code += `var _results = new Array(${this.options.taps.length});\n`;
		code += "var _checkDone = function() {\n";
		code += "for(var i = 0; i < _results.length; i++) {\n";
		code += "var item = _results[i];\n";
		code += "if(item === undefined) return false;\n";
		code += "if(item.result !== undefined) {\n";
		code += onResult("item.result");
		code += "return true;\n";
		code += "}\n";
		code += "if(item.error) {\n";
		code += onError("item.error");
		code += "return true;\n";
		code += "}\n";
		code += "}\n";
		code += "return false;\n";
		code += "}\n";
		code += this.callTapsParallel({
			onError: (i, err, done, doneBreak) => {
				let code = "";
				code += `if(${i} < _results.length && ((_results.length = ${i +
					1}), (_results[${i}] = { error: ${err} }), _checkDone())) {\n`;
				code += doneBreak(true);
				code += "} else {\n";
				code += done();
				code += "}\n";
				return code;
			},
			onResult: (i, result, done, doneBreak) => {
				let code = "";
				code += `if(${i} < _results.length && (${result} !== undefined && (_results.length = ${i +
					1}), (_results[${i}] = { result: ${result} }), _checkDone())) {\n`;
				code += doneBreak(true);
				code += "} else {\n";
				code += done();
				code += "}\n";
				return code;
			},
			onTap: (i, run, done, doneBreak) => {
				let code = "";
				if (i > 0) {
					code += `if(${i} >= _results.length) {\n`;
					code += done();
					code += "} else {\n";
				}
				code += run();
				if (i > 0) code += "}\n";
				return code;
			},
			onDone
		});
		return code;
	}
}

const factory = new AsyncParallelBailHookCodeFactory();

const COMPILE = function(options) {
	factory.setup(this, options);
	return factory.create(options);
};

function AsyncParallelBailHook(args = [], name = undefined) {
	const hook = new Hook(args, name);
	hook.constructor = AsyncParallelBailHook;
	hook.compile = COMPILE;
	hook._call = undefined;
	hook.call = undefined;
	return hook;
}

AsyncParallelBailHook.prototype = null;

module.exports = AsyncParallelBailHook;