<?php

namespace App\Services;

use App\Enums\PaymentGateway;
use App\Enums\ShipmentStatus;
use App\Enums\TransactionStatus;
use App\Enums\TransactionType;
use App\Models\Shipment;
use App\Models\ShipmentTrackingEvent;
use App\Models\Wallet;
use App\Models\WalletTransaction;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Log;

class OrderPaymentService
{
    /**
     * پرداخت از کیف پول
     */
    public function payFromWallet(Shipment $shipment, Wallet $wallet): array
    {
        // بررسی موجودی
        if (!$wallet->hasSufficientBalance($shipment->total_fee)) {
            return [
                'success' => false,
                'message' => 'موجودی کیف پول کافی نیست.',
                'required' => $shipment->total_fee,
                'available' => $wallet->balance,
            ];
        }

        try {
            return DB::transaction(function () use ($shipment, $wallet) {
                // ۱. ثبت تراکنش کسر از کیف پول
                $transaction = WalletTransaction::create([
                    'wallet_id' => $wallet->id,
                    'amount' => -$shipment->total_fee,
                    'balance_before' => $wallet->balance,
                    'balance_after' => $wallet->balance - $shipment->total_fee,
                    'type' => TransactionType::ORDER_PAYMENT,
                    'status' => TransactionStatus::COMPLETED,
                    'gateway' => PaymentGateway::WALLET,
                    'description' => "پرداخت سفارش {$shipment->awb_no}",
                    'transactionable_type' => Shipment::class,
                    'transactionable_id' => $shipment->id,
                    'ip_address' => request()->ip(),
                    'user_agent' => request()->userAgent(),
                ]);

                // ۲. به‌روزرسانی موجودی کیف پول
                $wallet->update([
                    'balance' => $wallet->balance - $shipment->total_fee,
                    'total_withdrawn' => $wallet->total_withdrawn + $shipment->total_fee,
                ]);

                // ۳. تغییر status سفارش به processed
                $shipment->update(['status' => ShipmentStatus::Processed]);

                // ۴. ثبت tracking event (با همه فیلدهای احتمالی)
                $this->createTrackingEvent($shipment, 'پرداخت تکمیل شد (از کیف پول)');

                Log::info('Order paid from wallet', [
                    'shipment_id' => $shipment->id,
                    'awb_no' => $shipment->awb_no,
                    'amount' => $shipment->total_fee,
                    'wallet_id' => $wallet->id,
                ]);

                return [
                    'success' => true,
                    'message' => 'پرداخت با موفقیت انجام شد.',
                    'transaction_id' => $transaction->id,
                    'new_status' => 'processed',
                ];
            });
        } catch (\Exception $e) {
            Log::error('Wallet payment failed', [
                'shipment_id' => $shipment->id,
                'error' => $e->getMessage(),
            ]);

            return [
                'success' => false,
                'message' => 'خطا در پرداخت: ' . $e->getMessage(),
            ];
        }
    }

    /**
     * شروع پرداخت از درگاه
     */
    public function initiateGatewayPayment(Shipment $shipment, Wallet $wallet): array
    {
        try {
            // ۱. ایجاد تراکنش pending
            $transaction = WalletTransaction::create([
                'wallet_id' => $wallet->id,
                'amount' => $shipment->total_fee,
                'balance_before' => $wallet->balance,
                'balance_after' => $wallet->balance,
                'type' => TransactionType::ORDER_PAYMENT,
                'status' => TransactionStatus::PENDING,
                'gateway' => PaymentGateway::ZARINPAL,
                'description' => "پرداخت سفارش {$shipment->awb_no}",
                'transactionable_type' => Shipment::class,
                'transactionable_id' => $shipment->id,
                'ip_address' => request()->ip(),
                'user_agent' => request()->userAgent(),
                'metadata' => [
                    'shipment_id' => $shipment->id,
                    'awb_no' => $shipment->awb_no,
                    'is_order_payment' => true,
                ],
            ]);

            // ۲. درخواست به درگاه
            $gatewayService = app()->make(\App\Services\ZarinpalService::class);
            
            if (config('ifnex.zarinpal.merchant_id') === 'fake-merchant-id-for-testing' 
                || config('ifnex.zarinpal.sandbox', true)) {
                $gatewayService = app()->make(\App\Services\MockZarinpalService::class);
            }

            $paymentData = $gatewayService->requestPayment(
                amount: $shipment->total_fee,
                description: "پرداخت سفارش {$shipment->awb_no}",
                mobile: $shipment->user->phone,
                email: $shipment->user->email
            );

            // ۳. ذخیره authority در metadata
            $metadata = $transaction->metadata ?? [];
            $metadata['zarinpal_authority'] = $paymentData['authority'];
            $transaction->update(['metadata' => $metadata]);

            return [
                'success' => true,
                'payment_url' => $paymentData['payment_url'],
                'transaction_id' => $transaction->id,
                'authority' => $paymentData['authority'],
            ];

        } catch (\Exception $e) {
            Log::error('Gateway payment initiation failed', [
                'shipment_id' => $shipment->id,
                'error' => $e->getMessage(),
            ]);

            return [
                'success' => false,
                'message' => 'خطا در اتصال به درگاه: ' . $e->getMessage(),
            ];
        }
    }

    /**
     * تکمیل پرداخت بعد از callback موفق
     */
    public function completeGatewayPayment(WalletTransaction $transaction): bool
    {
        try {
            return DB::transaction(function () use ($transaction) {
                $shipment = Shipment::find($transaction->transactionable_id);
                
                if (!$shipment || $shipment->status !== ShipmentStatus::Approved) {
                    return false;
                }

                // ۱. به‌روزرسانی تراکنش
                $transaction->update([
                    'status' => TransactionStatus::COMPLETED,
                    'balance_after' => $transaction->wallet->balance,
                ]);

                // ۲. تغییر status سفارش
                $shipment->update(['status' => ShipmentStatus::Processed]);

                // ۳. ثبت tracking event
                $this->createTrackingEvent($shipment, 'پرداخت تکمیل شد (از درگاه بانکی)');

                Log::info('Order paid via gateway', [
                    'shipment_id' => $shipment->id,
                    'awb_no' => $shipment->awb_no,
                    'transaction_id' => $transaction->id,
                ]);

                return true;
            });
        } catch (\Exception $e) {
            Log::error('Complete gateway payment failed', [
                'transaction_id' => $transaction->id,
                'error' => $e->getMessage(),
            ]);

            return false;
        }
    }

        /**
     * ساخت Tracking Event با ساختار دقیق جدول
     */
    private function createTrackingEvent(Shipment $shipment, string $description): void
    {
        try {
            ShipmentTrackingEvent::create([
                'shipment_id' => $shipment->id,
                'event_date' => now()->toDateString(),           // YYYY-MM-DD
                'event_time' => now()->format('H:i:s'),          // HH:MM:SS ← فیلد جدید
                'event_description' => $description,
                'location' => 'سیستم',
                'delivery_status' => 'processed',                 // ← اصلاح شد (status وجود نداشت)
                'source' => 'manual',  // مقدار معتبر enum TrackingSource
            ]);
            
        } catch (\Exception $e) {
            // اگر tracking event ثبت نشد، فقط لاگ کن (تراکنش را خراب نکن)
            Log::warning('Failed to create tracking event', [
                'shipment_id' => $shipment->id,
                'error' => $e->getMessage(),
            ]);
        }
    }
}