<?php

namespace App\Http\Controllers;

use App\Models\Payment;
use Illuminate\Http\Request;
use GuzzleHttp\Client;
use Illuminate\Support\Facades\Log;
use GuzzleHttp\Exception\ClientException;
use GuzzleHttp\Exception\ServerException;

class WisePaymentController extends Controller
{
    private $wiseClient;
    private $wiseApiKey;
    private $profileId;

    public function __construct()
    {
        $this->wiseApiKey = env('WISE_API_KEY');
        $this->profileId = env('WISE_PROFILE_ID'); // Your Wise business/profile ID

        $this->wiseClient = new Client([
            'base_uri' => 'https://api.wise.com/v1/',
            'headers' => [
                'Authorization' => 'Bearer ' . $this->wiseApiKey,
                'Content-Type' => 'application/json',
            ],
        ]);
    }

    public function createTransfer(Request $request)
    {
        // Validate the incoming request data
        $validatedData = $request->validate([
            'amount' => 'required|numeric|min:0.01',
            'source_currency' => 'required|string|size:3',
            'target_currency' => 'required|string|size:3',
            'recipient_name' => 'required|string|max:255',
            'recipient_email' => 'required|email',
            'recipient_account_number' => 'required|string',
            'recipient_bank_code' => 'sometimes|string', // Needed for some countries
            'recipient_address' => 'sometimes|array',
            'reason' => 'sometimes|string|max:255',
        ]);

        try {
            // Create a new Payment record
            $payment = new Payment([
                'amount' => $validatedData['amount'],
                'currency' => $validatedData['source_currency'],
                'target_currency' => $validatedData['target_currency'],
                'recipient_name' => $validatedData['recipient_name'],
                'recipient_email' => $validatedData['recipient_email'],
                'status' => 'pending',
                'client_session_id' => $request->client_session_id ?? uniqid('wise_', true)
            ]);
            $payment->save();

            // Create recipient account
            $recipient = $this->createRecipient($validatedData);

            // Create quote
            $quote = $this->createQuote($validatedData);

            // Create transfer
            $transfer = $this->createTransferWise($quote, $recipient, $validatedData);

            // Fund the transfer
            $this->fundTransfer($transfer['id']);

            // Update the Payment record
            $payment->wise_transfer_id = $transfer['id'];
            $payment->wise_recipient_id = $recipient['id'];
            $payment->wise_quote_id = $quote['id'];
            $payment->status = 'processing';
            $payment->save();

            return response()->json([
                'success' => true,
                'message' => 'Transfer initiated successfully.',
                'transfer_id' => $transfer['id'],
                'payment_id' => $payment->id
            ]);

        } catch (ClientException $e) {
            $response = $e->getResponse();
            $body = json_decode($response->getBody()->getContents(), true);

            Log::error('Wise Client Error:', [
                'code' => $e->getCode(),
                'message' => $e->getMessage(),
                'details' => $body
            ]);

            if (isset($payment)) {
                $payment->status = 'failed';
                $payment->error_message = $e->getMessage();
                $payment->save();
            }

            return response()->json([
                'success' => false,
                'message' => 'Wise API failed to process the request.',
                'error' => $body['errors'] ?? $e->getMessage()
            ], 400);

        } catch (\Exception $e) {
            Log::error('General Wise API Error:', [
                'message' => $e->getMessage(),
                'trace' => $e->getTraceAsString()
            ]);

            if (isset($payment)) {
                $payment->status = 'failed';
                $payment->error_message = $e->getMessage();
                $payment->save();
            }

            return response()->json([
                'success' => false,
                'message' => 'An unexpected error occurred.',
                'error' => $e->getMessage()
            ], 500);
        }
    }

    public function handleWebhook(Request $request)
    {
        // Verify the webhook signature if needed
        $payload = $request->all();

        Log::info('Wise Webhook Received:', $payload);

        if (isset($payload['data']['resource']['id'])) {
            $transferId = $payload['data']['resource']['id'];

            // Find the payment by transfer ID
            $payment = Payment::where('wise_transfer_id', $transferId)->first();

            if ($payment) {
                $payment->status = $payload['data']['current_state'] ?? 'unknown';
                $payment->save();

                // You might want to trigger other actions based on status change
            }
        }

        return response()->json(['status' => 'ok']);
    }

    // Helper methods to interact with Wise API
    private function createRecipient($data)
    {
        $response = $this->wiseClient->post('accounts', [
            'json' => [
                'profile' => $this->profileId,
                'accountHolderName' => $data['recipient_name'],
                'currency' => $data['target_currency'],
                'type' => 'email', // or 'sort_code', 'aba', 'iban' etc. based on country
                'details' => [
                    'email' => $data['recipient_email'],
                    // Add more details based on account type and country
                    'legalType' => 'PRIVATE',
                    // 'accountNumber' => $data['recipient_account_number'],
                    // 'bankCode' => $data['recipient_bank_code'] ?? null,
                ]
            ],
        ]);

        return json_decode($response->getBody(), true);
    }

    private function createQuote($data)
    {
        $response = $this->wiseClient->post('quotes', [
            'json' => [
                'profile' => $this->profileId,
                'source' => $data['source_currency'],
                'target' => $data['target_currency'],
                'rateType' => 'FIXED', // or 'FLOAT'
                'sourceAmount' => $data['amount'],
                'type' => 'BALANCE_PAYOUT' // or 'BALANCE_CONVERSION'
            ],
        ]);

        return json_decode($response->getBody(), true);
    }

    private function createTransferWise($quote, $recipient, $data)
    {
        $response = $this->wiseClient->post('transfers', [
            'json' => [
                'targetAccount' => $recipient['id'],
                'quote' => $quote['id'],
                'customerTransactionId' => uniqid('cti_', true),
                'details' => [
                    'reference' => $data['reason'] ?? 'Payment for services',
                    'transferPurpose' => $data['reason'] ?? 'Payment for services',
                ]
            ],
        ]);

        return json_decode($response->getBody(), true);
    }

    private function fundTransfer($transferId)
    {
        // Check if the transfer requires funding
        $transfer = $this->wiseClient->get("transfers/{$transferId}");
        $transferData = json_decode($transfer->getBody(), true);

        if ($transferData['status'] === 'pending') {
            // Fund the transfer from your balance
            $this->wiseClient->post("transfers/{$transferId}/payments", [
                'json' => [
                    'type' => 'BALANCE',
                    'profile' => $this->profileId
                ]
            ]);
        }
    }

    // Additional helper method to check transfer status
    public function checkTransferStatus($paymentId)
    {
        $payment = Payment::findOrFail($paymentId);

        try {
            $response = $this->wiseClient->get("transfers/{$payment->wise_transfer_id}");
            $transferData = json_decode($response->getBody(), true);

            $payment->status = $transferData['status'];
            $payment->save();

            return response()->json([
                'success' => true,
                'status' => $transferData['status']
            ]);

        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Failed to check transfer status'
            ], 500);
        }
    }
}