<?php
namespace App\Services;

use App\Models\Miscellaneous\WebsiteSetting;
use Illuminate\Support\Collection;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\Schema;
use Throwable;

class SettingsService
{
    /**
     * Store settings as string-to-string collection for type safety.
     * @var Collection<string, string>
     */
    public private(set) Collection $settings;

    public function __construct()
    {
        $this->settings = new Collection();
        $this->refresh();
    }

    /**
     * Get a setting value or return a default.
     */
    public function getOrDefault(string $settingName, string $default = ''): string
    {
        return $this->settings->get($settingName, $default);
    }

    /**
     * Refresh settings from database/cache.
     */
    public function refresh(): void
    {
        Cache::forget('website_settings');
        
        try {
            $result = Cache::remember(
                key: 'website_settings',
                ttl: now()->addMinutes(5),
                callback: function () {
                    if (!Schema::hasTable('website_settings')) {
                        return collect([]);
                    }
                    return WebsiteSetting::pluck('value', 'key');
                }
            );

            $data = $this->normalizeSettings($result);
            
            /** @var Collection<string, string> */
            $this->settings = new Collection($data);
        } catch (Throwable) {
            /** @var Collection<string, string> */
            $this->settings = new Collection([]);
        }
    }

    /**
     * Normalize settings data to ensure all keys and values are strings.
     * 
     * @param Collection<array-key, mixed>|array<array-key, mixed> $result
     * @return array<string, string>
     */
    private function normalizeSettings(Collection|array $result): array
    {
        $data = [];
        
        foreach ($result as $key => $value) {
            // array-key is int|string, so we can safely cast to string
            $safeKey = (string) $key;
            
            // Ensure value is a string
            if (is_scalar($value)) {
                $safeValue = (string) $value;
            } elseif (is_null($value)) {
                $safeValue = '';
            } else {
                continue; // Skip non-scalar, non-null values
            }
            
            $data[$safeKey] = $safeValue;
        }
        
        return $data;
    }
}