<?php

class Mail
{
	/** @var mixed variable to collect errors */
	private $error;

	/**
	 * Try to send a mail by using PHP's native mail() function.
	 * Please note that not PHP itself will send a mail, it's just a wrapper for Linux's sendmail or other mail tools
	 *
	 * Good guideline on how to send mails natively with mail():
	 * @see http://stackoverflow.com/a/24644450/1114320
	 * @see http://www.php.net/manual/en/function.mail.php
	 */
	public function sendMailWithNativeMailFunction()
	{
		// no code yet, so we just return something to make IDEs and code analyzer tools happy
		return false;
	}

	/**
	 * Try to send a mail by using SwiftMailer.
	 * Make sure you have loaded SwiftMailer via Composer.
	 *
	 * @return bool
	 */
	public function sendMailWithSwiftMailer()
	{
		// no code yet, so we just return something to make IDEs and code analyzer tools happy
		return false;
	}

	/**
	 * Try to send a mail by using PHPMailer.
	 * Make sure you have loaded PHPMailer via Composer.
	 * Depending on your EMAIL_USE_SMTP setting this will work via SMTP credentials or via native mail()
	 *
	 * @param $user_email
	 * @param $from_email
	 * @param $from_name
	 * @param $subject
	 * @param $body
	 *
	 * @return bool
	 * @throws Exception
	 * @throws phpmailerException
	 */
	public function sendMailWithPHPMailer($user_email, $from_email, $from_name, $subject, $body)
	{
		$mail = new PHPMailer;

		// if you want to send mail via PHPMailer using SMTP credentials
		if (Config::get('EMAIL_USE_SMTP')) {
			// set PHPMailer to use SMTP
			$mail->IsSMTP();
			// 0 = off, 1 = commands, 2 = commands and data, perfect to see SMTP errors
			$mail->SMTPDebug = 0;
			// enable SMTP authentication
			$mail->SMTPAuth = Config::get('EMAIL_SMTP_AUTH');
			// encryption
			if (Config::get('EMAIL_SMTP_ENCRYPTION')) {
				$mail->SMTPSecure = Config::get('EMAIL_SMTP_ENCRYPTION');
			}
			// set SMTP provider's credentials
			$mail->Host = Config::get('EMAIL_SMTP_HOST');
			$mail->Username = Config::get('EMAIL_SMTP_USERNAME');
			$mail->Password = Config::get('EMAIL_SMTP_PASSWORD');
			$mail->Port = Config::get('EMAIL_SMTP_PORT');
		} else {
			$mail->IsMail();
		}

		// fill mail with data
		$mail->From = $from_email;
		$mail->FromName = $from_name;
		$mail->AddAddress($user_email);
		$mail->Subject = $subject;
		$mail->Body = $body;

		// try to send mail
		$mail->Send();

		if ($mail) {
			return true;
		} else {
			// if not successful, copy errors into Mail's error property
			$this->error = $mail->ErrorInfo;
			return false;
		}
	}

	public function sendMail($user_email, $from_email, $from_name, $subject, $body)
	{
		if (Config::get('EMAIL_USED_MAILER') == "phpmailer") {
			// returns true if successful, false if not
			return $this->sendMailWithPHPMailer(
				$user_email, $from_email, $from_name, $subject, $body
			);
		}

		if (Config::get('EMAIL_USED_MAILER') == "swiftmailer") {
			return $this->sendMailWithSwiftMailer();
		}

		if (Config::get('EMAIL_USED_MAILER') == "native") {
			return $this->sendMailWithNativeMailFunction();
		}
	}

	public function getError()
	{
		return $this->error;
	}
}