/**
 * Copyright 2013 IBM Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 **/

var RED = require("../../red/red");

var spawn = require('child_process').spawn;
var exec = require('child_process').exec;

function ExecNode(n) {
	RED.nodes.createNode(this,n);
	this.cmd = n.command;
	this.append = n.append || "";
	this.useSpawn = n.useSpawn;

	var node = this;
	this.on("input", function(msg) {
		if (msg != null) {

			if (this.useSpawn == true) {
				// make the extra args into an array
				// then prepend with the msg.payload
				var arg = node.append.split(",");
				if (msg.payload != " ") { arg.unshift(msg.payload); }
				console.log(arg);
				var ex = spawn(node.cmd,arg);
				ex.stdout.on('data', function (data) {
					//console.log('[exec] stdout: ' + data);
					msg.payload = data;
					node.send([msg,null,null]);
				});
				ex.stderr.on('data', function (data) {
					//console.log('[exec] stderr: ' + data);
					msg.payload = data;
					node.send([null,msg,null]);
				});
				ex.on('close', function (code) {
					//console.log('[exec] result: ' + code);
					msg.payload = code;
					node.send([null,null,msg]);
				});
			}

			else {
				var cl = node.cmd+" "+msg.payload+" "+node.append;
				node.log(cl);
				var child = exec(cl, function (error, stdout, stderr) {
					msg.payload = stdout;
					var msg2 = {payload:stderr};
					//console.log('[exec] stdout: ' + stdout);
					//console.log('[exec] stderr: ' + stderr);
					if (error !== null) {
						var msg3 = {payload:error};
						//console.log('[exec] error: ' + error);
					}
					node.send([msg,msg2,msg3]);
				});
			}
		}

	});
}

RED.nodes.registerType("exec",ExecNode);