<?php

namespace App\Console\Commands;

use App\Models\SystemSetting;
use App\Models\ExchangeRateHistory;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Http;

class UpdateExchangeRates extends Command
{
    protected $signature = 'ifnex:update-rates {--source=ecb : Data source for exchange rates (ecb or freecurrencyapi)}';

    protected $description = 'Fetch exchange rates from external APIs and create PENDING proposals (awaiting manager approval)';

    public function handle(): int
    {
        $source = $this->option('source');

        $this->info("Fetching exchange rates from source: {$source}...");

        try {
            $rates = match ($source) {
                'freecurrencyapi' => $this->fetchFromFreeCurrencyApi(),
                default => $this->fetchFromEcb(),
            };
        } catch (\Throwable $e) {
            $this->error("Failed to fetch rates: {$e->getMessage()}");
            return Command::FAILURE;
        }

        if ($rates) {
            $this->updateRate('aed_to_irr', $rates['aed_to_irr'], 'api', null, $source);
            $this->updateRate('usd_to_irr', $rates['usd_to_irr'], 'api', null, $source);

            $this->info("✅ Pending rate proposals created (awaiting manager approval in panel):");
            $this->line("  AED/IRR proposed: " . number_format($rates['aed_to_irr']));
            $this->line("  USD/IRR proposed: " . number_format($rates['usd_to_irr']));
            $this->line("  Live rate unchanged until manager approves.");
        } else {
            $this->warn("⚠️  API fetch failed. No pending rate created. Live rate unchanged.");
        }

        return Command::SUCCESS;
    }

    /**
     * نرخ زنده (SystemSetting) دست‌نخورده می‌مونه.
     * فقط یک رکورد «در انتظار تأیید» در تاریخچه ثبت می‌شه.
     * مدیر صبح در پنل → تأیید می‌کنه → اون‌وقت روی نرخ زنده اعمال می‌شه.
     */
    private function updateRate(string $key, float $newRate, string $source, ?int $userId, ?string $apiSource = null): void
    {
        $setting = SystemSetting::where('key', $key)->first();
        $oldRate = $setting ? (float) $setting->value : 0;

        if ($oldRate > 0 && abs($newRate - $oldRate) > 0.01) {
            $currencyFrom = str_starts_with($key, 'aed') ? 'AED' : 'USD';
            $changePercent = round((($newRate - $oldRate) / $oldRate) * 100, 4);

            ExchangeRateHistory::create([
                'currency_from'  => $currencyFrom,
                'currency_to'    => 'IRR',
                'old_rate'       => $oldRate,
                'new_rate'       => $newRate,
                'change_percent' => $changePercent,
                'change_source'  => $source,
                'changed_by'     => $userId,
                'api_source'     => $apiSource,
                'notes'          => null,
                'status'         => 'pending',
            ]);
        }
    }

    private function fetchFromEcb(): ?array
    {
        $response = Http::timeout(10)->get('https://api.exchangerate-api.com/v4/latest/AED');

        if ($response->failed()) {
            return null;
        }

        $data = $response->json();

        return [
            'aed_to_irr' => round($data['rates']['IRR'] ?? 455000, 2),
            'usd_to_irr' => round(($data['rates']['IRR'] ?? 425000) / 1.07, 2),
        ];
    }

    private function fetchFromFreeCurrencyApi(): ?array
    {
        $response = Http::timeout(10)->get('https://api.freecurrencyapi.com/v1/latest', [
            'apikey' => config('ifnex.currency.api_key'),
            'base_currency' => 'AED',
        ]);

        if ($response->failed()) {
            return null;
        }

        $data = $response->json();

        if (!isset($data['data'])) {
            return null;
        }

        return [
            'aed_to_irr' => round(($data['data']['IRR'] ?? 455000), 2),
            'usd_to_irr' => round(($data['data']['IRR'] ?? 425000) / 1.07, 2),
        ];
    }
}