<?php

/*
* it means someone outside wp is accessing the file, in this case kill it.
*/
if (!defined('ABSPATH')) {
	die('You can not access this file!');
}


/*
* events and emails :
*
* 1. [/] profs    :  payment_success     : paypal payment success
* 2. [/] profs    :  payment_echec       : paypal payment echec
* 3. [/] profs    :  transfert_success   : validation transfert prof reussi, send email
* 4. [ ] partners :  offer_expired       : offres temporaires -> gerer qu'elles disparaissent apres la date de validite -> la passer en masquer
* 5. [ ] partners :  offer_will_expire   : la gestion des offres à échéance
* 6. [ ] prof     :  account_deleted     : schedule event pour supprimer le compte xx temps (6 mois ?) apres fin de validite de la carte
* 7. [ ] prof     :  account_will_expire : faire rappels emails avant expiration
* 8. [ ] prof     :  account_expired     : desactiver carte expiree
*
* maybe log mails error ? https://wordpress.stackexchange.com/a/336533/226939
*
*/


function prepare_emails_CIPF($email_name, $user_id) {
	Plgntls::debug_infos();
	$emails_option_object = Cipf::OPTION_EMAILS;

	if (!isset($emails_option_object['_default'][$email_name])) {
		return false;
	}

	$header_content_type = 'Content-Type: text/html; charset=UTF-8';

	
	$emails_option = Plgntls::get_option_safe($emails_option_object);
	if (!$emails_option) {
		return false;
	}
	if (!isset($emails_option[$email_name])) {
		return false;
	}
	$email = $emails_option[$email_name];


	$emails = array();
	if (isset($email['notification_send']) && $email['notification_send'] === 'on') {
		$tmp_email = array();
		$tmp_email['to'] = $email['notification_to'];
		$tmp_email['subject'] = $email['notification_subject'];
		$tmp_email['message'] = $email['notification_message'];
		$tmp_email['headers'] = array();
		$tmp_email['headers'][] = $header_content_type;
		$tmp_email['headers']['user_id'] = $user_id;
		$from = $email['notification_from'];
		if (empty($from)) {
			$from = get_option('admin_email');
		}
		if (!empty($from)) {
			$tmp_email['headers'][] = 'From: '.$from;
		}
		$emails[] = $tmp_email;
	}
	if (isset($email['confirmation_send']) && $email['confirmation_send'] === 'on') {
		$tmp_email = array();
		if (is_null($user_id)) {
			$user_id = get_current_user_id();
		}
		if ($user_id === 0) {
			return false;
		}
		$user = get_user_by('id', $user_id);
		$user_email = $user->user_email;
		$tmp_email['to'] = $user_email;
		$tmp_email['subject'] = $email['confirmation_subject'];
		$tmp_email['message'] = $email['confirmation_message'];
		$tmp_email['headers'] = array();
		$tmp_email['headers'][] = $header_content_type;
		$tmp_email['headers']['user_id'] = $user_id;
		$from = $email['confirmation_from'];
		if (empty($from)) {
			$from = get_option('admin_email');
		}
		if (!empty($from)) {
			$tmp_email['headers'][] = 'From: '.$from;
		}
		$emails[] = $tmp_email;
	}
	return $emails;
}


function send_emails_CIPF($email_name, $user_id = null) {
	Plgntls::debug_infos();
	$emails = prepare_emails_CIPF($email_name, $user_id);
	if (false === $emails) {
		error_log('Email preparing failed!: ' . json_encode($email_name));
		return;
	}

	foreach ($emails as $email) {
		// dont delete, for log
		error_log("send '".$email_name."' email to: ".$email['to']." (".json_encode($email).")");

		$sent = wp_mail($email['to'], $email['subject'], $email['message'], $email['headers']);
		if (!$sent) {
			error_log('Email sending failed!: ' . json_encode($email));
		}
	}
}


/*
* get the acf reminders,
* - continue the ones not for the reminder_type
* - continue if date is not yet soon enough
* - continue if email was already sent
*
*/
function handle_send_reminders_CIPF($acf_id, $user_id, $date_limit, $reminder_type, $email_type) {
	$is_before_reminders = true;
	$reminders_choices = get_emails_reminders_choices_CIPF($acf_id);
	foreach ($reminders_choices as $reminder_key => $value) {
		$duration = get_duration_CIPF($reminder_key, $reminder_type);
		if (false === $duration) {
			continue;
		}

		$diff = compare_diff_with_today_CIPF($date_limit, $duration);
		if ($diff > 0) {
			continue;
		}
		$is_before_reminders = false;

		if (is_email_reminder_choice_CIPF($reminder_key, $acf_id)) {
			continue;
		}
		set_email_reminder_choice_CIPF($reminder_key, $acf_id);

		send_emails_CIPF($email_type, $user_id);
		return; // don't send multiple emails
	}

	/*
	* if didnt return, it either means that :
	* - today is before any reminder
	* - today is after all reminders
	* use 'is_before_reminders' to know
	*
	*/
	if ($is_before_reminders) {
		reset_emails_reminders_box_CIPF($reminder_type, $acf_id);
	}
}


/*
* extract the duration
* returns false if not for the right type
*
*/
function get_duration_CIPF($reminder, $type) {
	Plgntls::debug_infos();

	$explode_reminder = explode('/', $reminder);
	$explode_reminder = array_map('trim', $explode_reminder);
	if ($explode_reminder[0] !== $type) {
		return false;
	}
	$duration = $explode_reminder[1];
	return $duration;
}


/*
* find the diffs :
* - the intended diff between the deletion date and the reminder
* - the diff between the deletion date and today
* and return the difference
*
*/
function compare_diff_with_today_CIPF($date, $duration) {
	Plgntls::debug_infos();

	$date_reminder = $date->modify($duration);
	$date_diff = date_diff($date, $date_reminder);
	$date_diff = (int)$date_diff->format('%R%a');

	$date_now = date_create('now');
	$current_date_diff = date_diff($date, $date_now);
	$current_date_diff = (int)$current_date_diff->format('%R%a');

	return ($date_diff - $current_date_diff);
}

?>