<?php

namespace App\Http\Controllers\Billers;

use App\Http\Controllers\Controller;
use App\Models\Gateway;
use App\Models\Transaction;
use App\Models\User;
use App\Models\WalletHistory;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;

class MonnifyWebhookController extends Controller
{
    public function index(Request $request)
    {
        $payload = $request->all();

        // Log the incoming payload
        Log::info('Incoming Monnify Webhook Payload: ' . json_encode($payload));

        $eventData = $payload['eventData'] ?? null;
        if (!$eventData) {
            // If eventData is missing, log and return a response
            Log::error('Invalid Monnify Webhook Payload: eventData is missing');
            return response()->json(['success' => false, 'error' => 'Invalid payload'], 400);
        }

        $customer = $eventData['customer'] ?? null;
        if (!$customer || !isset($customer['email'])) {
            // If customer data or email is missing, log and return a response
            Log::error('Invalid Monnify Webhook Payload: customer data or email is missing');
            return response()->json(['success' => false, 'error' => 'Invalid payload'], 400);
        }

        $transactionReference = $eventData['transactionReference'] ?? null;
        $amountPaid = $eventData['amountPaid'] ?? null;
        $customerName = $customer['name'] ?? null;
        $customerEmail = $customer['email'];

        // Check if the transaction with the provided reference already exists
        if ($transactionReference && Transaction::where('reference', $transactionReference)->exists()) {
            Log::info('Transaction with reference ' . $transactionReference . ' already exists. Skipping processing.');
            return response()->json(['success' => true, 'message' => 'Transaction already processed'], 200);
        }

        // Process the payload based on the event type
        if ($transactionReference && $amountPaid && $customerName) {
            Log::info($customerName . ' just made a payment of ' . $amountPaid . ' with reference no ' . $transactionReference);

            $user = User::where('email', $customerEmail)->first();
            if ($user) {
                // Calculate commission fee
                $commissionRate = Gateway::pluck('rate')->first() ?? 3.0;
                $percentFee = $commissionRate / 100; 
                $fee = $amountPaid * $percentFee;  

                // Calculate the remaining amount after deducting the fee
                $remainingAmount = $amountPaid - $fee; 

                // Update user's wallet balance with the remaining amount
                $user->wallet->balance += $remainingAmount;
                $user->wallet->save(); 

                // Log transaction
                $this->logTransaction($user, $transactionReference, $remainingAmount);

                // Log wallet history
                $this->logWalletHistory($transactionReference, $user, $remainingAmount);
            }
        } else {
            Log::error('Invalid Monnify Webhook Payload: Missing required data');
            return response()->json(['success' => false, 'error' => 'Invalid payload'], 400);
        }

        // Respond with a success status
        return response()->json(['success' => true]);
    }

    private function logTransaction($user, $transactionReference, $remainingAmount)
    {
        Transaction::create([
            'user_id' => $user->id,
            'reference' => $transactionReference,
            'amount' => $remainingAmount,
            'commission' => 0,
            'status' => 200,
            'type' => 'FUNDING',
            'network' => 'WALLET',
            'destination' => 'Dear customer, Your wallet funding of N' . $remainingAmount . ' successful',
        ]);
    }

    private function logWalletHistory($transactionReference, $user, $remainingAmount)
    {
        $previousBalance = $user->wallet->balance - $remainingAmount;
        WalletHistory::create([
            'user_id' => $user->id,
            'previous_balance' => $previousBalance,
            'current_balance' => $user->wallet->balance,
            'amount' => $remainingAmount,
            'transaction_type' => 'VIRTUAL WALLET FUNDING',
            'transaction_id' => $transactionReference,
        ]);
    }
}