<?php
namespace MailPoet\Models;

use DateTimeInterface;

if (!defined('ABSPATH')) exit;

/**
 * @property int $newsletter_id
 * @property int $subscriber_id
 * @property int $queue_id
 * @property int $link_id
 * @property int $count
 */
class StatisticsClicks extends Model {
  public static $_table = MP_STATISTICS_CLICKS_TABLE;

  static function createOrUpdateClickCount($link_id, $subscriber_id, $newsletter_id, $queue_id) {
    $statistics = self::where('link_id', $link_id)
      ->where('subscriber_id', $subscriber_id)
      ->where('newsletter_id', $newsletter_id)
      ->where('queue_id', $queue_id)
      ->findOne();
    if (!$statistics) {
      $statistics = self::create();
      $statistics->link_id = $link_id;
      $statistics->subscriber_id = $subscriber_id;
      $statistics->newsletter_id = $newsletter_id;
      $statistics->queue_id = $queue_id;
      $statistics->count = 1;
    } else {
      $statistics->count++;
    }
    return $statistics->save();
  }

  static function getAllForSubscriber(Subscriber $subscriber) {
    return static::tableAlias('clicks')
      ->select('clicks.id', 'id')
      ->select('newsletter_rendered_subject')
      ->select('clicks.created_at', 'created_at')
      ->select('url')
      ->join(
       SendingQueue::$_table,
       array('clicks.queue_id', '=', 'queue.id'),
       'queue'
      )
      ->join(
        NewsletterLink::$_table,
        array('clicks.link_id', '=', 'link.id'),
        'link'
      )
      ->where('clicks.subscriber_id', $subscriber->id())
      ->orderByAsc('url');
  }

  static function findLatestPerNewsletterBySubscriber(Subscriber $subscriber, DateTimeInterface $before, $since_days_ago) {
    // subquery to find latest click IDs for each newsletter
    $table = self::$_table;
    $latest_click_ids_per_newsletter_query = "
      SELECT (
        SELECT id
        FROM $table
        WHERE newsletter_id = c.newsletter_id
        ORDER BY updated_at DESC
        LIMIT 1
      )
      FROM $table c
      WHERE c.subscriber_id = :subscriber_id
      AND c.updated_at < :before
      AND c.updated_at > DATE_SUB(NOW(), INTERVAL :since_days_ago DAY)
      GROUP BY c.newsletter_id
    ";

    return static::tableAlias('clicks')
      ->whereRaw("clicks.id IN ($latest_click_ids_per_newsletter_query)", [
        'subscriber_id' => $subscriber->id,
        'before' => $before->format('Y-m-d H:i:s'),
        'since_days_ago' => $since_days_ago,
      ])
      ->findMany();
  }
}