<?php

namespace App\Services;

use App\Models\StoreSetting;
use Illuminate\Support\Facades\Schema;
use RuntimeException;
use Throwable;

class StoreSettings
{
    private ?array $resolved = null;

    public function all(): array
    {
        if ($this->resolved !== null) {
            return $this->resolved;
        }

        $defaults = $this->defaults();

        if (!$this->tableExists()) {
            return $this->resolved = $defaults;
        }

        $stored = StoreSetting::query()
            ->pluck('value', 'key')
            ->map(fn ($value) => (string) $value)
            ->all();

        return $this->resolved = array_replace($defaults, $stored);
    }

    public function get(string $key, mixed $default = null): mixed
    {
        $settings = $this->all();

        return $settings[$key] ?? $default;
    }

    public function defaults(): array
    {
        return (array) config('store.settings_defaults', []);
    }

    public function keys(): array
    {
        return array_keys($this->defaults());
    }

    public function setMany(array $values): void
    {
        if (!$this->tableExists()) {
            throw new RuntimeException('store_settings table is missing. Please run php artisan migrate.');
        }

        $now = now();
        $rows = collect($values)
            ->only($this->keys())
            ->map(fn ($value, $key) => [
                'key' => $key,
                'value' => (string) $value,
                'created_at' => $now,
                'updated_at' => $now,
            ])
            ->values()
            ->all();

        if ($rows === []) {
            return;
        }

        StoreSetting::query()->upsert($rows, ['key'], ['value', 'updated_at']);
        $this->resolved = null;
    }

    private function tableExists(): bool
    {
        try {
            return Schema::hasTable('store_settings');
        } catch (Throwable) {
            return false;
        }
    }
}