<?php

namespace App\Services;

use App\Models\SiteDataItem;
use InvalidArgumentException;

/**
 * @used-by \siteData()
 */
class SiteDataService
{
    public function __construct(
        protected array $defaults = [],
        protected string $cacheKeyPrefix = '',
        protected int $cacheExpiration = 0
    ) {
        $this->defaults = config('siteData.defaults', []);
        $this->cacheKeyPrefix = config('siteData.cache_key_prefix', 'site_data_');
        $this->cacheExpiration = config('siteData.cache_ttl', 86400);
    }

    public function get(string $key): mixed
    {
        $this->ensureKeyExists($key);

        $cacheKey = $this->cacheKeyPrefix.$key;

        return cache()->remember($cacheKey, $this->cacheExpiration, function () use ($key) {
            $dataItem = SiteDataItem::find($key);

            $value = $dataItem?->value ?? $this->defaults[$key]['value'];
            $type = $dataItem?->type ?? $this->defaults[$key]['type'];

            return $type === 'json' ? json_decode($value, true) : $value;
        });
    }

    public function set(string $key, string|array $value, ?string $type = null): void
    {
        $this->ensureKeyExists($key);

        $cacheKey = $this->cacheKeyPrefix.$key;
        cache()->forget($cacheKey);

        $type = $type ?? $this->defaults[$key]['type'];

        if (is_array($value)) {
            $value = json_encode($value);
            $type = 'json';
        }

        SiteDataItem::updateOrCreate(
            ['key' => $key],
            ['value' => $value, 'type' => $type]
        );
    }

    public function has(string $key): bool
    {
        return isset($this->defaults[$key]);
    }

    public function forget(string $key): void
    {
        $this->ensureKeyExists($key);

        $cacheKey = $this->cacheKeyPrefix.$key;
        cache()->forget($cacheKey);
    }

    protected function ensureKeyExists(string $key): void
    {
        if (! $this->has($key)) {
            throw new InvalidArgumentException("Site data key [$key] is not defined in configuration.");
        }
    }
}