<?php

namespace SilverStripe\BehatExtension\Utility;

/**
 * Same principle as core TestMailer class,
 * but saves emails in {@link TestSessionEnvironment}
 * to share the state between PHP calls (CLI vs. browser).
 */
class TestMailer extends \Mailer {

	/**
	 * @var TestSessionEnvironment
	 */
	protected $testSessionEnvironment;

	public function __construct() {
		$this->testSessionEnvironment = \Injector::inst()->get('TestSessionEnvironment');
	}

	/**
	 * Send a plain-text email.
	 * TestMailer will merely record that the email was asked to be sent, without sending anything.
	 */
	public function sendPlain($to, $from, $subject, $plainContent, $attachedFiles = false, $customHeaders = false) {
		$this->saveEmail(array(
			'Type' => 'plain',
			'To' => $to,
			'From' => $from,
			'Subject' => $subject,
			'Content' => $plainContent,
			'PlainContent' => $plainContent,
			'AttachedFiles' => implode(',', $attachedFiles),
			'CustomHeaders' => implode(',', $customHeaders),
		));

		return true;
	}
	
	/**
	 * Send a multi-part HTML email
	 * TestMailer will merely record that the email was asked to be sent, without sending anything.
	 */
	public function sendHTML($to, $from, $subject, $htmlContent, $attachedFiles = false, $customHeaders = false,
			$plainContent = false, $inlineImages = false) {

		$this->saveEmail(array(
			'Type' => 'html',
			'To' => $to,
			'From' => $from,
			'Subject' => $subject,
			'Content' => $htmlContent,
			'PlainContent' => $plainContent,
			'AttachedFiles' => implode(',', $attachedFiles),
			'CustomHeaders' => implode(',', $customHeaders),
		));

		return true;
	}
	
	/**
	 * Clear the log of emails sent
	 */
	public function clearEmails() {
		$state = $this->testSessionEnvironment->getState();
		if(isset($state->emails)) unset($state->emails);
		$this->testSessionEnvironment->applyState($state);
	}

	/**
	 * Search for an email that was sent.
	 * All of the parameters can either be a string, or, if they start with "/", a PREG-compatible regular expression.
	 * 
	 * @param $to
	 * @param $from
	 * @param $subject
	 * @param $content
	 * @return array Contains the keys: 'type', 'to', 'from', 'subject', 'content', 'plainContent', 'attachedFiles',
	 *               'customHeaders', 'htmlContent', 'inlineImages'
	 */
	public function findEmail($to = null, $from = null, $subject = null, $content = null) {
		$matches = $this->findEmails($to, $from, $subject, $content);
		return $matches ? $matches[0] : null;
	}

	/**
	 * Search for all emails.
	 * All of the parameters can either be a string, or, if they start with "/", a PREG-compatible regular expression.
	 * 
	 * @param $to
	 * @param $from
	 * @param $subject
	 * @param $content
	 * @return array Contains the keys: 'type', 'to', 'from', 'subject', 'content', 'plainContent', 'attachedFiles',
	 *               'customHeaders', 'htmlContent', 'inlineImages'
	 */
	public function findEmails($to = null, $from = null, $subject = null, $content = null) {
		$matches = array();
		$args = func_get_args();
		$state = $this->testSessionEnvironment->getState();
		$emails = isset($state->emails) ? $state->emails : array();
		foreach($emails as $email) {
			$matched = true;

			foreach(array('To','From','Subject','Content') as $i => $field) {
				if(!isset($email->$field)) continue;
				$value = (isset($args[$i])) ? $args[$i] : null;
				if($value) {
					if($value[0] == '/') $matched = preg_match($value, $email->$field);
					else $matched = ($value == $email->$field);
					if(!$matched) break;
				}
			}
			if($matched) $matches[] = $email;
		}

		return $matches;
	}

	protected function saveEmail($data) {
		$state = $this->testSessionEnvironment->getState();
		if(!isset($state->emails)) $state->emails = array();
		$state->emails[] = array_filter($data);
		$this->testSessionEnvironment->applyState($state);
	}

}