<?php

namespace App\Http\Controllers\api;

use App\Http\Controllers\Controller;
use App\Models\GoldCurrency;
use App\Traits\BaseApiResponse;
use Carbon\Carbon;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class CurrencyController extends Controller
{
    use BaseApiResponse;

    public function goldPrices()
    {
        // 1. Check if we already updated the database today
        $latestUpdate = GoldCurrency::max('updated_at');
        $isUpdatedToday = $latestUpdate && Carbon::parse($latestUpdate)->isToday();

        // 2. If not updated today, call the API (Cache once per day)
        if (!$isUpdatedToday) {
            $this->fetchAndCacheGoldPrices();
        }

        // 3. Fetch data from our own database
        $goldCurrencies = GoldCurrency::all()->map(function ($currency) {
            return [
                'change_percent' => $currency->change_percent,
                'change_value' => $currency->change_value,
                'date' => $currency->updated_at->format('Y-m-d'), // Format for the DTO
                'name' => $currency->name,
                'name_en' => $currency->name_en,
                'price' => $currency->price,
                'symbol' => $currency->symbol,
                'time' => $currency->updated_at->format('H:i:s'), // Format for the DTO
                'time_unix' => $currency->time_unix,
                'unit' => $currency->unit,
            ];
        });

        // 4. Return in the exact format your frontend expects!
        // We nest it inside ['gold' => ...] to match your CurrencyListBrsDto
        return $this->success([
            'gold' => $goldCurrencies
        ], 'موفق', 'لیست قیمت طلا و سکه دریافت شد.');
    }

    /**
     * Private helper to fetch from the external API and save to DB
     */
    private function fetchAndCacheGoldPrices()
    {
        try {
            $url = 'https://Api.BrsApi.ir/Api/Market/Gold_Currency.php?key=B727Ue3kBrbtCwHR3BmSVZKRRNF1sllp';

            // Timeout after 10 seconds so the user isn't stuck waiting if the API is down
            $response = Http::timeout(10)->get($url);

            if ($response->successful()) {
                $data = $response->json();

                if (isset($data['gold']) && is_array($data['gold'])) {
                    foreach ($data['gold'] as $item) {
                        // updateOrCreate uses the 'name_en' as the unique key to update existing rows
                        GoldCurrency::updateOrCreate(
                            ['name_en' => $item['name_en']],
                            [
                                'name' => $item['name'],
                                'price' => (int) $item['price'],
                                'change_percent' => (float) $item['change_percent'],
                                'change_value' => (int) $item['change_value'],
                                'symbol' => $item['symbol'] ?? null,
                                'unit' => $item['unit'] ?? null,
                                'time_unix' => (int) $item['time_unix'],
                            ]
                        );
                    }
                }
            } else {
                Log::warning('BrsApi returned an error status: ' . $response->status());
            }
        } catch (\Exception $e) {
            // If the API completely dies (DNS issue, offline), we log it but don't crash.
            // The controller will just safely return yesterday's prices from the DB!
            Log::error('Failed to fetch from BrsApi: ' . $e->getMessage());
        }
    }
}