<?php

namespace App\Observers;

use App\Models\UserFlight;
use Illuminate\Support\Facades\Cache;

class FlightObserver
{
    protected function clearCache(UserFlight $flight): void
    {
        Cache::forget("user_flights_{$flight->user->id}");

        //Make queued task if the site gets big
        $flight->user->followers()
            ->get()
            ->each(fn ($follower) => Cache::forget("user_following_flights_{$follower->user_id}"));
    }


    /**
     * Recalculate after a flight is created.
     */
    public function created(UserFlight $flight): void
    {
        $flight->user->calculateAchievements();
        $this->clearCache($flight);
    }

    /**
     * Recalculate after a flight is updated.
     * Cabin class, flight type, airline, etc. may have changed,
     * which could unlock or revoke achievements.
     */
    public function updated(UserFlight $flight): void
    {
        \Log::info('Observer fired for flight ' . $flight->id);
        $flight->user->calculateAchievements();
        $this->clearCache($flight);
    }

    /**
     * Recalculate after a flight is deleted.
     * Previously earned achievements may no longer be valid.
     */
    public function deleted(UserFlight $flight): void
    {
        $flight->user->calculateAchievements();
        $this->clearCache($flight);
    }
}