<?php

namespace App\Traits\Models;

use Illuminate\Support\Facades\Cache;

/**
 * If there is a static function in a trait (named boot[TraitName]),
 * it will be executed as the boot() function would on an Eloquent model.
 * Futhermore, event in the Model observer doesn't erase actual events in the model,
 * but adds them.
 */
trait HasCache
{
    /**
     * Perform any actions required after the model boots.
     *
     * @return void
     */
    public static function bootHasCache(): void
    {
        static::created(function () {
            self::resetCache();
        });
        static::updated(function () {
            self::resetCache();
        });
        static::deleted(function () {
            self::resetCache();
        });
        if (method_exists(static::class, 'initializeSoftDeletes')) {
            static::restored(function () {
                self::resetCache();
            });
            static::forceDeleted(function () {
                self::resetCache();
            });
        }
    }

    /**
     * Reset all cache elements related to this model.
     *
     * @return void
     */
    public static function resetCache(): void
    {
        Cache::forget(static::getCacheKey());
        static::getModelsCached();
    }

    /**
     * Get all models cached.
     *
     * @return \Illuminate\Database\Eloquent\Collection<int,self>
     */
    public static function getModelsCached(): \Illuminate\Database\Eloquent\Collection
    {
        return Cache::remember(static::getCacheKey(), 86400, function () {
            $class = static::class;

            /** @var \Illuminate\Database\Eloquent\Model $class */
            return $class::query()
                ->when(property_exists($class, 'cacheRelations') && is_array($class::$cacheRelations), function ($query) use ($class) {
                    $query->with($class::$cacheRelations);
                })
                ->get();
        });
    }

    /**
     * Generate a unique cache key for the model.
     *
     * @return string
     */
    private static function getCacheKey(): string
    {
        return 'cache_' . str_replace('\\', '_', static::class);
    }
}