<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');

class Event_email_schedule_model extends CI_Model {

    var $column_order = array(null, 'es.start_date_time', 'ees.email_schedule_date', 'ees.email_schedule_status', 'email_schedule_author', null); //set column field database for datatable orderable
    var $column_search = array('CONCAT(u.first_name, " ", u.last_name)','ees.email_schedule_date_added'); //set column field database for datatable searchable just firstname , lastname , address are searchable
    var $order = array('ees.email_schedule_date' => 'asc'); // default order

    public function __construct() {
        parent::__construct();
    }

    private function _get_datatables_query($data_source){

        $this->db->select("
            ees.email_schedule_id,
            es.event_schedule_id,
            es.event_id,
            es.back_office_status as event_status,
            ees.email_schedule_status as email_schedule_status_
            ")
            ->select("(CASE
              WHEN ees.email_schedule_status = 1 THEN 'Active'
              ELSE 'Passed'
            END) AS email_schedule_status", FALSE)
            ->select("(CASE
              WHEN ees.email_sched_overwrite_default = 1 THEN 'OUI'
              WHEN ees.email_sched_overwrite_default = 2 THEN 'NON'
              ELSE 'NO'
            END) AS email_sched_overwrite_default", FALSE)
            ->select("DATE_FORMAT(ees.email_schedule_date, '%d/%m/%Y %Hh%i') AS email_schedule_date", FALSE)
            ->select("DATE_FORMAT(es.reservation_start_date, '%d/%m/%Y %H:%i:%s') AS reservation_start_date", FALSE)
            ->select("DATE_FORMAT(es.start_date_time, '%d/%m/%Y %Hh%i') AS start_date_time", FALSE)
            ->select("DATE_FORMAT(es.start_date_time, '%d/%m/%Y %H:%i:%s') AS start_date_time_", FALSE)
            ->select("CONCAT(u.first_name, ' ', u.last_name) as email_schedule_author", FALSE)
            ->select("DATE_FORMAT(ees.email_schedule_date_added, '%d/%m/%Y %Hh%i') AS email_schedule_date_added", FALSE)
            ->select("DATE_FORMAT(ees.email_schedule_date, '%Y-%m-%d %H:%i:%s') AS email_schedule_date_", FALSE)
            ->from("event_email_schedule ees")
            ->join('event_schedule es', 'es.event_schedule_id = ees.event_schedule_id', 'left')
            ->join('event_email_default_setting eeds', 'eeds.email_tpl_setting_id = ees.reference', 'left')
            ->join('user u', 'u.user_id = ees.email_schedule_author', 'left')
            ->where("eeds.email_type_id", 1)
            ->where("ees.event_schedule_id", $data_source["event_schedule_id"])
            ->where_in("ees.email_schedule_status", array(1, 2));

        $i = 0;

        foreach ($this->column_search as $item) {// loop column
            if ($data_source['search']['value']) {  // if datatable send POST for search
                if ($i === 0) { // first loop
                    $this->db->like($item, $data_source['search']['value']);
                } else {
                    $this->db->or_like($item, $data_source['search']['value']);
                }
            }
            $i++;
        }

        $this->db->order_by('email_schedule_status', 'asc');
        if(isset($data_source['order'])) { // here order processing
            if(isset($data_source['order']['0']['dir'])) {
                $this->db->order_by($this->column_order[$data_source['order']['0']['column']], $data_source['order']['0']['dir']);
            }
        } else if(isset($this->order)) {
            $order = $this->order;
            $this->db->order_by(key($order), $order[key($order)]);
        }
    }

    public function get_events_list_export($data_source){
        $this->_get_datatables_query($data_source);
        $query = $this->db->get();
        return $query->result();
    }

    public function get_datatables($data_source){
        $this->_get_datatables_query($data_source);
        if($data_source['length'] != -1)
            $this->db->limit($data_source['length'], $data_source['start']);
        return $this->db->get()->result();
    }

    public function count_filtered($data_source){
        $this->_get_datatables_query($data_source);
        return $this->db->get()->num_rows();
    }

    public function count_all($data_source){
        $this->_get_datatables_query($data_source);
        return $this->db->count_all_results();
    }

    public function add_email_reminder($data){
        if($data) {
            //defer all default settings using the default email sending
            $this->db->query("UPDATE event_email_recipient eer
            LEFT JOIN event_email_recipient_other_detail eerod
                ON eerod.email_recipient_id = eer.email_recipient_id
            SET eer.email_status = 5,
            eer.email_date_time = (CASE WHEN eer.email_status IN(0, 2, 3)
                THEN NOW() ELSE eer.email_date_time END)
            WHERE eerod.email_sched_reference = 2
            AND eer.email_type_id = 1
            AND eer.email_status IN(1, 0, 2, 3)
            AND eerod.email_sched_reference_id IN(SELECT
                eeds.email_tpl_setting_id
            FROM event_email_default_setting eeds
            WHERE eeds.email_type_id = 1
                AND eeds.email_tpl_setting_status = 1
                AND eeds.is_default = 0
            )");

            //defer all default settings using the custom
            $this->db->query("UPDATE event_email_recipient eer
            LEFT JOIN event_email_recipient_other_detail eerod
                ON eerod.email_recipient_id = eer.email_recipient_id
            SET eer.email_status = 5,
            eer.email_date_time = (CASE WHEN eer.email_status IN(0, 2, 3)
                THEN NOW() ELSE eer.email_date_time END)
            WHERE eerod.email_sched_reference = 1
            AND eer.email_type_id = 1
            AND eer.email_status IN(1, 0, 2, 3)
            AND eerod.email_sched_reference_id = '".$this->db->escape_str($data["reference"])."'");

            //replace all schedule, make it past
            $this->db->where('event_schedule_id', $data['event_schedule_id']);
            $this->db->where('email_schedule_status', 1);
            $this->db->update('event_email_schedule', array('email_schedule_status' => 2));

            $this->db->insert("event_email_schedule", $data);
            if ($this->db->affected_rows()) {
                return $this->db->insert_id();
            }
        }
        return false;
    }

    public function update_email_reminder($data){
        if($data) {
            $email_schedule_id = $data["email_schedule_id"];
            unset($data["email_schedule_id"]);

            //if event is changed then defer sending emails to subscribers under the previously selected event for this record.
            if($this->check_changed_of_event($email_schedule_id, $data["event_schedule_id"])) {
                //defer all default settings using the default email sending
                $this->db->query("UPDATE event_email_recipient eer
                LEFT JOIN event_email_recipient_other_detail eerod
                    ON eerod.email_recipient_id = eer.email_recipient_id
                SET eer.email_status = 5,
                eer.email_date_time = (CASE WHEN eer.email_status IN(0, 2, 3)
                THEN NOW() ELSE eer.email_date_time END)
                WHERE eerod.email_sched_reference = 1
                AND eer.email_type_id = 1
                AND eer.email_status IN(1, 0, 2, 3)
                AND eerod.email_sched_reference_id = '".$this->db->escape_str($email_schedule_id)."'");
            }

            $this->db->where("email_schedule_id", $email_schedule_id);
            $update = $this->db->update("event_email_schedule", $data);
            if ($update) {
                return true;
            }
        }
        return false;
    }

    private function check_changed_of_event($email_schedule_id, $event_schedule_id){
        return $this->db->query(
            "SELECT eer.email_recipient_id
             FROM event_email_recipient eer
             LEFT JOIN event_email_recipient_other_detail eerod
                ON eerod.email_recipient_id = eer.email_recipient_id
             WHERE eerod.email_sched_reference_id = ?
             AND eer.event_schedule_id != ?
             AND eerod.email_sched_reference = 1
             AND eer.email_type_id = 1
             AND eer.email_status IN(0,2,3)
             LIMIT 1 ", array($email_schedule_id, $event_schedule_id))->num_rows();
    }

    public function delete_email_reminder($email_schedule_id){
        //when an schedule is deleted, the on queue reminder email must be deferred/deleted also to stop from sending emails to subscribers.
        $this->db->query("UPDATE event_email_recipient eer
        LEFT JOIN event_email_recipient_other_detail eerod
            ON eerod.email_recipient_id = eer.email_recipient_id
        SET eer.email_status = 5, eer.email_date_time = NOW()
        WHERE eerod.email_sched_reference = 1
        AND eer.email_type_id = 1
        AND eer.email_status IN(0, 2, 3)
        AND eerod.email_sched_reference_id = '".$this->db->escape_str($email_schedule_id)."'");

        $this->db->where("email_schedule_id", $email_schedule_id);
        $this->db->update("event_email_schedule", array("email_schedule_status" => 0));
        return $this->db->affected_rows();
    }

    public function get_email_sending_schedule($event){

        //new schedule
        $parameters = $this->get_default_email_schedule($event->event_id, 3);
        if(countVal($parameters) <= 0) {
            return array();
        }
        return $this->db->query("
            SELECT
                eeds.email_tpl_setting_id as email_schedule_id,
                (CASE
                  WHEN eeds.email_tpl_setting_sched_by = 'HOURS'
                  THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL eeds.email_tpl_setting_sched+5 HOUR)
                  WHEN eeds.email_tpl_setting_sched_by = 'DAYS'
                  THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL eeds.email_tpl_setting_sched+1 DAY)
                  ELSE DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL eeds.email_tpl_setting_sched+120 MINUTE)
                END) AS email_schedule,
                2 as email_sched_reference

            FROM event_email_default_setting eeds
            WHERE eeds.email_type_id = 3
                AND eeds.email_tpl_setting_status = 1
                AND eeds.email_tpl_setting_id
                NOT IN(
                    SELECT `ees`.`reference`
                    FROM event_email_schedule ees
                    LEFT JOIN event e
                        ON e.event_id = ees.event_id
                    WHERE `ees`.`event_id` = '".$this->db->escape_str($event->event_id)."'
                        AND ees.reference = eeds.email_tpl_setting_id
                        AND ees.email_schedule_status IN (1,2)
                        AND e.back_office_status IN(2,3)
                        GROUP BY ees.reference
                )
                AND
                    eeds.email_tpl_setting_id IN(".((isset($parameters->email_tpl_setting_id) && !empty($parameters->email_tpl_setting_id))?$this->db->escape($parameters->email_tpl_setting_id):"").")
                AND
                (
                SELECT
                    CASE
                        WHEN CONCAT(eeds.reference_id,'_',eeds.email_type_id,'_',eeds.is_default,'_1') = ?
                        THEN
                            (SELECT CASE
                              WHEN eeds.email_tpl_setting_sched_by = 'HOURS'
                              THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched+5) HOUR)
                              WHEN eeds.email_tpl_setting_sched_by = 'DAYS'
                              THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched+2) DAY)
                              ELSE DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched +60) MINUTE)
                            END)

                        WHEN CONCAT(eeds.reference_id,'_',eeds.email_type_id,'_',eeds.is_default,'_1') = ?
                        THEN
                            (SELECT CASE
                              WHEN eeds.email_tpl_setting_sched_by = 'HOURS'
                              THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched+5) HOUR)
                              WHEN eeds.email_tpl_setting_sched_by = 'DAYS'
                              THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched+2) DAY)
                              ELSE DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched +60) MINUTE)
                            END)

                        WHEN CONCAT('_',eeds.email_type_id,'_',eeds.is_default,'_1') = ?
                        THEN
                            (SELECT CASE
                              WHEN eeds.email_tpl_setting_sched_by = 'HOURS'
                              THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched+5) HOUR)
                              WHEN eeds.email_tpl_setting_sched_by = 'DAYS'
                              THEN DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched+2) DAY)
                              ELSE DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched +60) MINUTE)
                            END)

                        ELSE DATE_SUB('".$this->db->escape_str($event->start_date_time)."', INTERVAL (eeds.email_tpl_setting_sched +60) MINUTE)
                    END

                ) <= NOW()

            UNION

            SELECT `ees`.`email_schedule_id`,
                ees.email_schedule_date as email_schedule,
                1 as email_sched_reference
            FROM `event` e
            LEFT JOIN `event_email_schedule` ees
                ON `ees`.`event_id` = `e`.`event_id`
            LEFT JOIN `event_email_default_setting` eeds
                ON `eeds`.`email_tpl_setting_id` = `ees`.`reference`
            WHERE `e`.`event_id` = '".$this->db->escape_str($event->event_id)."'
                AND e.start_date_time >= NOW()
                AND ees.email_schedule_status = 1
                AND eeds.email_type_id = 3
                AND e.back_office_status IN(2,3)
                AND DATE_SUB(ees.email_schedule_date, INTERVAL 2 DAY) <= NOW()
        ORDER BY
            email_schedule, email_schedule_id ASC LIMIT 1", array(($event->event_id."_3_1_1"), ($event->event_id."_3_1_1"), "_3_0_1"))->result();
    }

    public function check_email_active_processes($email_schedule_id){
        $this->db->where("email_sched_reference_id", $email_schedule_id);
        $this->db->where("email_sched_reference", 1);
        $this->db->where("email_type_id", 1);
        $this->db->where_in("email_status", array(0,2,3));
        $this->db->limit(5);
        return $this->db->get("event_email_recipient")->num_rows();
    }

    public function add_email_schedule_for_waitlist($event_id, $event_schedule_id){

        $parameters =$this->get_default_email_schedule($event_id, $event_schedule_id, 2);

        //update previous email schedule before adding new one
        $this->db->query("
                UPDATE event_email_schedule ees
                LEFT JOIN event_email_default_setting eeds on
                    eeds.email_tpl_setting_id = ees.reference
                set
                    ees.email_schedule_status = 2
                 WHERE
                    eeds.email_type_id = 2
                AND
                    ees.email_schedule_status = 1
                AND
                    ees.event_schedule_id = ".$this->db->escape($event_schedule_id)."");

        if(countVal($parameters) > 0){
            //then insert a new one
            $reset_sched_date = date_modify(new DateTime(), "+".$parameters->email_tpl_setting_sched.strtolower($parameters->email_tpl_setting_sched_by));

            $data = array(
                "event_schedule_id"  => $event_schedule_id,
                "reference" => $parameters->email_tpl_setting_id, // parameters
                "email_schedule_date"  => $reset_sched_date->format("Y-m-d H:i:s"), //reset hr
                "email_schedule_status"    => 1
            );

            $this->db->insert("event_email_schedule", $data);
            return array(
                "success" => true,
                "schedule"=> $parameters,
                "email_schedule_id" => $this->db->insert_id()
                );
        }

        return array("success" => false);
    }

    private function get_default_email_schedule($event_id, $email_type){

        $where_data = array(
                //'if' get the specific schedule per event_schedule_id
                // $event_schedule_id."_2",
                //'else if' get the specific schedule per event_id
                $event_id."_1",
                //'else if' get the default sched if any
                "_0"
                //'else' return false
            );
        $result = array();

        foreach ($where_data as $value){
            $result = $this->db->query("
            SELECT
                eeds.email_tpl_setting_id,
                eeds.email_tpl_setting_sched,
                eeds.email_tpl_setting_sched_by,
                eeds.email_tpl_number_of_recipients
            FROM event_email_default_setting eeds
            WHERE eeds.email_type_id = ".$this->db->escape($email_type)."
                AND eeds.email_tpl_setting_status = 1
                AND "
                .(($value != "_0")
                    ? "CONCAT(eeds.reference_id,'_',eeds.is_default)"
                    : "CONCAT('_',eeds.is_default)")." = '".$this->db->escape_str($value)."'"."
            ")->row();
            if(countVal($result) > 0){
                break;
            }
        }
        return $result;
    }

    public function set_reminder_sched_to_pass() {

        $this->db->query("UPDATE event_email_recipient eer
        LEFT JOIN event_email_recipient_other_detail eerod
            ON eerod.email_recipient_id = eer.email_recipient_id
        LEFT JOIN event_email_schedule ees
            ON ees.email_schedule_id = eerod.email_sched_reference_id
        SET eer.email_status = 5,
        eer.email_date_time = (CASE WHEN eer.email_status IN(2, 3)
            THEN NOW() ELSE eer.email_date_time END)
        WHERE eerod.email_sched_reference = 1
        AND eer.email_type_id = 1
        AND eer.email_status IN(1, 2, 3)
        AND ees.email_schedule_status IN(2,0)
        ");

        //replace all schedule, make it past
        $this->db->query("UPDATE event_email_schedule ees
        LEFT JOIN event_email_default_setting eeds
            ON eeds.email_tpl_setting_id = ees.reference
        SET ees.email_schedule_status = 2,
        ees.email_schedule_date_added = NOW()
        WHERE ees.email_schedule_status = 1
        AND eeds.is_default = 0
        AND eeds.email_type_id = 1
        AND eeds.email_tpl_setting_status = 1
        AND ees.email_schedule_date < NOW()
        ");
        $updated_rows = $this->db->affected_rows();
        if($updated_rows > 0){
            return $updated_rows;
        }
        return false;
    }
}