<?php

use \vendor\DB\DB;

class service extends base {
	/**
	 * This service will expect a JSON POST data of:
	 * ["data"] => {"nonce": "randomString", "message": "cipherText", "signature": "abcdef"}
	 * Signature will be a sha256 of the message pre-encrypt with nonce appended to the end
	 * ie
	 * {JSON} + "|" nonce + "|" + sharedhash
	 * Note: sharedhash should NOT be the sharedkey that is used to encrypt the message
	 *
	 *
	 * Unencrypted cipherText will look like
	 * {"output": "stdout of run", "run_date": "2015-01-01", "time_taken": 10, "result": 0}
	 * Just like in most modern programs - a result of anything but 0 indicates an error
	 *
	 * @param $jobId
	 */
	public function upload($jobId) {
		if ($jobId && is_int($jobId)) {
			/** @var \application\models\Jobs $job */
			$job = \application\models\Jobs::getByField("id", $jobId)[0];
			//decrypt message
			$data = json_decode($_POST["data"]);
			$rawMessage = aes_decrypt($job->sharedkey,$data["message"]);

			// if decryption was successful -
			// check signature
			if (hash("sha256", $rawMessage . $data["nonce"] . $job->hash) == $data["signature"]) {
				// the message is verified
				$messageJson = json_decode($rawMessage);
				$history = \application\models\Histories::create($messageJson);
				$history->jobs_id = $job->id;
			}
		}
	}

	public function run() {
		if (in_array($_SERVER["REMOTE_ADDR"], $this->config["ACCEPTED_IPS"])) { // not very secure - but worst case they fire off the run early
			if (!file_exists("/tmp/kritbot")) {
				touch("/tmp/kritbot");
				/** @var \application\models\Jobs[] $jobs */
				$jobs = DB::fetchObject("SELECT * FROM jobs", "\\application\\models\\Jobs");
				foreach($jobs as $job) {
					if ($job->runType == 1) {
						$cron = Cron\CronExpression::factory($job->cron);
						if ($cron->isDue() || $job->force_run == 1) {
							$output = [];
							$returnVar = 0;

							$start = microtime(true);
							// grumble grumble something something windows
							if (stripos(php_uname("s"), "Win") !== false) {
								file_put_contents("/tmp/kritscript.bat", $job->runScript);
								exec("c:\\windows\\system32\\cmd.exe /c c:/tmp/kritscript.bat", $output, $returnVar);
							} else {
								file_put_contents("/tmp/kritscript", $job->runScript);
								exec("/tmp/kritscript", $output, $returnVar);
								chmod("/tmp/kritscript", 0777);
							}
							$end = microtime(true);
							$delta = $end - $start;
							$scriptOutput = implode("\n", $output);
							if ($returnVar != 0) {
								if (stripos(php_uname("s"), "Win") !== false) {
									file_put_contents("/tmp/kritscript.bat", $job->failScript);
									exec("c:\\windows\\system32\\cmd.exe /c c:/tmp/kirtscript.bat");
								} else {
									file_put_contents("/tmp/kritscript", $job->failScript);
									exec("/tmp/kritscript", $output, $returnVar);
									chmod("/tmp/kritscript", 0777);
								}
							}
							$historyObj = new \application\models\Histories();
							$historyObj->output = $scriptOutput;
							$historyObj->result = $returnVar;
							$historyObj->time_taken = $delta;
							$historyObj->jobs_id = $job->id;
							$now = date("Y-m-d H:i:s");
							$historyObj->run_date = $now;
							$historyObj->save();
							$job->force_run = 0;
							$job->last_run = $now;
							$job->last_result = $returnVar;
							$job->save();
						}
					}
				}
				unlink("/tmp/kritbot");
			}
		}
	}
}