<?php declare(strict_types = 1);

namespace MailPoet\Homepage;

use MailPoet\AutomaticEmails\WooCommerce\Events\AbandonedCart;
use MailPoet\Automation\Engine\Storage\AutomationStorage;
use MailPoet\Automation\Integrations\MailPoet\Actions\SendEmailAction;
use MailPoet\Automation\Integrations\MailPoet\Triggers\SomeoneSubscribesTrigger;
use MailPoet\Automation\Integrations\MailPoet\Triggers\UserRegistrationTrigger;
use MailPoet\Entities\NewsletterEntity;
use MailPoet\Entities\SubscriberEntity;
use MailPoet\Form\FormsRepository;
use MailPoet\Newsletter\NewslettersRepository;
use MailPoet\Services\Bridge;
use MailPoet\Settings\SettingsController;
use MailPoet\Subscribers\SubscribersRepository;
use MailPoet\Util\License\Features\Subscribers;
use MailPoet\WooCommerce\Helper as WooCommerceHelper;
use MailPoet\WP\Functions as WPFunctions;
use MailPoetVendor\Carbon\Carbon;

class HomepageDataController {
  public const UPSELL_SUBSCRIBERS_COUNT_REQUIRED = 600;

  /** @var SettingsController */
  private $settingsController;

  /** @var SubscribersRepository */
  private $subscribersRepository;

  /** @var FormsRepository */
  private $formsRepository;

  /** @var WooCommerceHelper */
  private $wooCommerceHelper;

  /** @var NewslettersRepository */
  private $newslettersRepository;

  /** @var AutomationStorage */
  private $automationStorage;

  /** @var Subscribers */
  private $subscribers;

  /** @var WPFunctions */
  private $wp;

  public function __construct(
    SettingsController $settingsController,
    SubscribersRepository $subscribersRepository,
    FormsRepository $formsRepository,
    NewslettersRepository $newslettersRepository,
    AutomationStorage $automationStorage,
    Subscribers $subscribers,
    WPFunctions $wp,
    WooCommerceHelper $wooCommerceHelper
  ) {
    $this->settingsController = $settingsController;
    $this->subscribersRepository = $subscribersRepository;
    $this->formsRepository = $formsRepository;
    $this->newslettersRepository = $newslettersRepository;
    $this->automationStorage = $automationStorage;
    $this->wp = $wp;
    $this->wooCommerceHelper = $wooCommerceHelper;
    $this->subscribers = $subscribers;
  }

  public function getPageData(): array {
    $subscribersCount = $this->subscribersRepository->getTotalSubscribers();
    $formsCount = $this->formsRepository->count();
    $showTaskList = !$this->settingsController->get('homepage.task_list_dismissed', false);
    $showProductDiscovery = !$this->settingsController->get('homepage.product_discovery_dismissed', false);
    $showUpsell = !$this->settingsController->get('homepage.upsell_dismissed', false);
    return [
      'taskListDismissed' => !$showTaskList,
      'productDiscoveryDismissed' => !$showProductDiscovery,
      'upsellDismissed' => !$showUpsell,
      'taskListStatus' => $showTaskList ? $this->getTaskListStatus($subscribersCount, $formsCount) : null,
      'productDiscoveryStatus' => $showProductDiscovery ? $this->getProductDiscoveryStatus($formsCount) : null,
      'upsellStatus' => $showUpsell ? $this->getUpsellStatus($subscribersCount) : null,
      'wooCustomersCount' => $this->wooCommerceHelper->getCustomersCount(),
      'subscribersCount' => $subscribersCount,
      'subscribersStats' => $this->getSubscribersStats(),
    ];
  }

  /**
   * @return array{senderSet:bool, mssConnected:bool, wooSubscribersImported:bool, subscribersAdded:bool}
   */
  private function getTaskListStatus(int $subscribersCount, int $formsCount): array {
    return [
      'senderSet' => $this->settingsController->get('sender.address', false) && $this->settingsController->get('sender.name', false),
      'mssConnected' => Bridge::isMSSKeySpecified(),
      'wooSubscribersImported' => (bool)$this->settingsController->get('woocommerce_import_screen_displayed', false),
      'subscribersAdded' => $formsCount || ($subscribersCount > 10),
    ];
  }

  /**
   * @return array{setUpWelcomeCampaign:bool, addSubscriptionForm:bool, sendFirstNewsletter:bool, setUpAbandonedCartEmail:bool, brandWooEmails:bool}
   */
  private function getProductDiscoveryStatus(int $formsCount): array {
    $sentStandard = $this->newslettersRepository->getCountForStatusAndTypes(
      NewsletterEntity::STATUS_SENT,
      [NewsletterEntity::TYPE_STANDARD]
    );
    $scheduledStandard = $this->newslettersRepository->getCountForStatusAndTypes(
      NewsletterEntity::STATUS_SCHEDULED,
      [NewsletterEntity::TYPE_STANDARD]
    );
    $activePostNotificationsAndAutomaticEmails = $this->newslettersRepository->getCountForStatusAndTypes(
      NewsletterEntity::STATUS_ACTIVE,
      [NewsletterEntity::TYPE_NOTIFICATION, NewsletterEntity::TYPE_AUTOMATIC]
    );
    $abandonedCartEmailsCount = $this->newslettersRepository->getCountOfActiveAutomaticEmailsForEvent(AbandonedCart::SLUG);
    $welcomeEmailsCount = $this->newslettersRepository->getCountForStatusAndTypes( NewsletterEntity::STATUS_ACTIVE, [NewsletterEntity::TYPE_WELCOME]);
    $welcomeEmailLikeAutomationsCount = $this->automationStorage->getCountOfActiveByTriggerKeysAndAction(
      [UserRegistrationTrigger::KEY, SomeoneSubscribesTrigger::KEY],
      SendEmailAction::KEY
    );
    return [
      'setUpWelcomeCampaign' => ($welcomeEmailsCount + $welcomeEmailLikeAutomationsCount) > 0,
      'addSubscriptionForm' => $formsCount > 0,
      'sendFirstNewsletter' => ($sentStandard + $scheduledStandard + $activePostNotificationsAndAutomaticEmails) > 0,
      'setUpAbandonedCartEmail' => $abandonedCartEmailsCount > 0,
      'brandWooEmails' => (bool)$this->settingsController->get('woocommerce.use_mailpoet_editor', false),
    ];
  }

  /**
   * @return array{canDisplay:bool}
   */
  private function getUpsellStatus(int $subscribersCount): array {
    $hasValidMssKey = $this->subscribers->hasValidMssKey();

    return [
      'canDisplay' => !$hasValidMssKey && $subscribersCount > self::UPSELL_SUBSCRIBERS_COUNT_REQUIRED,
    ];
  }

  /**
   * @return array{global:array{subscribed:int, unsubscribed:int}}
   */
  private function getSubscribersStats(): array {
    $thirtyDaysAgo = Carbon::createFromTimestamp($this->wp->currentTime('timestamp'))->subDays(30);
    return [
      'global' => [
        'subscribed' => $this->subscribersRepository->getCountOfCreatedAfterWithStatues($thirtyDaysAgo, [SubscriberEntity::STATUS_SUBSCRIBED]),
        'unsubscribed' => $this->subscribersRepository->getCountOfUnsubscribedAfter($thirtyDaysAgo),
      ],
    ];
  }
}