<?php
namespace App\Services;

use App\Models\Wallet;
use App\Models\WalletTransaction;
use Illuminate\Support\Facades\DB;

class WalletService
{
    /**
     * واریز وجه به کیف پول
     */
    public function deposit(Wallet $wallet, float $amount, string $description = null, $transactionable = null): WalletTransaction
    {
        return DB::transaction(function () use ($wallet, $amount, $description, $transactionable) {
            $wallet->increment('balance', $amount);
            
            return $this->createTransaction($wallet, $amount, 'deposit', $description, $transactionable);
        });
    }

    /**
     * برداشت وجه از کیف پول
     */
    public function withdraw(Wallet $wallet, float $amount, string $description = null, $transactionable = null): WalletTransaction
    {
        if ($wallet->balance < $amount) {
            throw new \Exception('موجودی کیف پول کافی نیست.');
        }

        return DB::transaction(function () use ($wallet, $amount, $description, $transactionable) {
            $wallet->decrement('balance', $amount);
            
            // مبلغ برداشت به صورت منفی ثبت می‌شود
            return $this->createTransaction($wallet, -$amount, 'withdraw', $description, $transactionable);
        });
    }

    /**
     * ثبت تراکنش در دیتابیس
     */
    private function createTransaction(Wallet $wallet, float $amount, string $type, ?string $description, $transactionable): WalletTransaction
    {
        return WalletTransaction::create([
            'wallet_id' => $wallet->id,
            'amount' => $amount,
            'type' => $type,
            'description' => $description,
            'transactionable_type' => $transactionable ? get_class($transactionable) : null,
            'transactionable_id' => $transactionable?->id,
        ]);
    }
}