<?php
namespace YaySMTP;

defined( 'ABSPATH' ) || exit;

use YaySMTP\Helper\Utils;

class Schedule {
	protected static $instance = null;

	public static function getInstance() {
		if ( null == self::$instance ) {
			self::$instance = new self();
			self::$instance->doHooks();
		}

		return self::$instance;
	}

	private function doHooks() {
		add_filter( 'cron_schedules', array( $this, 'yaysmtp_datetime_custom_cron_schedule' ), 5, 1 );
		add_filter( 'cron_schedules', array( $this, 'yaysmtp_datetime_monthly_cron_schedule' ), 5, 1 );

		$deleteDatetimeSetting = Utils::getDeleteDatetimeSetting();
		if ( 0 !== $deleteDatetimeSetting ) {
			add_action( 'yaysmtp_delete_email_log_schedule_hook', array( $this, 'delete_email_log_schedule' ) );
			if ( ! wp_next_scheduled( 'yaysmtp_delete_email_log_schedule_hook' ) ) {
				wp_schedule_event( time() + 86400 * $deleteDatetimeSetting, 'yaysmtp_specific_delete_time', 'yaysmtp_delete_email_log_schedule_hook' );
			}
		} else {
			wp_clear_scheduled_hook( 'yaysmtp_delete_email_log_schedule_hook' );
		}

		$hasMailReportSett = $this->hasMailReportSett();
		$mailReportSett    = $this->getMailReportSett();
		if ( 'yes' == $hasMailReportSett ) {
			if ( 'weekly' == $mailReportSett ) {
				add_action( 'yaysmtp_send_email_report_weekly_schedule_hook', array( $this, 'send_mail_report_weekly' ) );
				if ( ! wp_next_scheduled( 'yaysmtp_send_email_report_weekly_schedule_hook' ) ) {
					wp_schedule_event( strtotime( 'monday this week' ), 'weekly', 'yaysmtp_send_email_report_weekly_schedule_hook' );
				}

				wp_clear_scheduled_hook( 'yaysmtp_send_email_report_monthly_schedule_hook' );
			} elseif ( 'monthly' == $mailReportSett ) {
				add_action( 'yaysmtp_send_email_report_monthly_schedule_hook', array( $this, 'send_mail_report_monthly' ) );
				if ( ! wp_next_scheduled( 'yaysmtp_send_email_report_monthly_schedule_hook' ) ) {
					wp_schedule_event( strtotime( 'first day of this month' ), 'yaysmtp_monthly_time', 'yaysmtp_send_email_report_monthly_schedule_hook' );
				}

				wp_clear_scheduled_hook( 'yaysmtp_send_email_report_weekly_schedule_hook' );
			}
		} else {
			wp_clear_scheduled_hook( 'yaysmtp_send_email_report_weekly_schedule_hook' );
			wp_clear_scheduled_hook( 'yaysmtp_send_email_report_monthly_schedule_hook' );
		}

	}

	private function __construct() {}

	public function yaysmtp_datetime_custom_cron_schedule( $schedules ) {
		$emailLogSetting       = Utils::getYaySmtpEmailLogSetting();
		$deleteDatetimeSetting = isset( $emailLogSetting ) && isset( $emailLogSetting['email_log_delete_time'] ) ? (int) $emailLogSetting['email_log_delete_time'] : 0;
		if ( 0 !== $deleteDatetimeSetting ) {
			$schedules['yaysmtp_specific_delete_time'] = array(
				'interval' => 86400 * $deleteDatetimeSetting,
				'display'  => 'Every ' . $deleteDatetimeSetting . ' days',
			);
		}

		return $schedules;
	}

	public function yaysmtp_datetime_monthly_cron_schedule( $schedules ) {
		$schedules['yaysmtp_monthly_time'] = array(
			'interval' => MONTH_IN_SECONDS,
			'display'  => __( 'Once Monthly', 'yay-smtp' ),
		);
		return $schedules;
	}

	public function delete_email_log_schedule( $days_setting = 0) {
		$days_setting = Utils::getDeleteDatetimeSetting();
		if ( 0 !== $days_setting ) { // !"Forever" Save Logs
			$deleteDatetimeSetting = Utils::getDeleteDatetimeSetting();
	    	Utils::deleteAllEmailLogsWithCondition($deleteDatetimeSetting, $deleteDatetimeSetting);
		}
	}

	public function send_mail_report_weekly() {
		$headers      = "Content-Type: text/html\r\n";
		$subjectEmail = __( 'YaySMTP - Mail Weekly Report', 'yay-smtp' );
		$emailAddress = Utils::getAdminEmail();
		$html         = Utils::getTemplateHtml(
			'weekly-mail',
			YAY_SMTP_PLUGIN_PATH . 'includes/Views/template-mail'
		);
		wp_mail( $emailAddress, $subjectEmail, $html, $headers );
	}

	public function send_mail_report_monthly() {
		$headers      = "Content-Type: text/html\r\n";
		$subjectEmail = __( 'YaySMTP - Mail Monthly Report', 'yay-smtp' );
		$emailAddress = Utils::getAdminEmail();
		$html         = Utils::getTemplateHtml(
			'monthly-mail',
			YAY_SMTP_PLUGIN_PATH . 'includes/Views/template-mail'
		);
		wp_mail( $emailAddress, $subjectEmail, $html, $headers );
	}

	public function getMailReportSett() {
		$result          = 'weekly';
		$yaysmtpSettings = Utils::getYaySmtpSetting();
		if ( ! empty( $yaysmtpSettings ) && ! empty( $yaysmtpSettings['mail_report_type'] ) ) {
			$result = $yaysmtpSettings['mail_report_type'];
		}
		return $result;
	}

	public function hasMailReportSett() {
		$result          = 'no';
		$yaysmtpSettings = Utils::getYaySmtpSetting();
		if ( ! empty( $yaysmtpSettings ) && ! empty( $yaysmtpSettings['mail_report_choose'] ) ) {
			$result = $yaysmtpSettings['mail_report_choose'];
		}
		return $result;
	}
}