<?php

namespace App\Http\Controllers\Api;

use App\Models\PayPalPayment;
use Illuminate\Http\JsonResponse;
use Illuminate\Support\Facades\Response as ResponseFacade;
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\StreamedResponse;

class PaypalTransactionsController extends BaseApiController
{
    protected PayPalPayment $paypalPayment;

    public function __construct()
    {
        parent::__construct();
        $this->paypalPayment = model(PayPalPayment::class);
    }

    public function index()
    {
        $page    = max(1, (int) ($this->request->getGet('page') ?? 1));
        $perPage = min(100, max(1, (int) ($this->request->getGet('per_page') ?? 20)));
        $keyword = $this->request->getGet('q');

        $query = $this->paypalPayment->newQuery()->orderBy('created_at', 'DESC');

        if ($keyword) {
            $query->where(function ($q) use ($keyword) {
                $q->where('transaction_id', 'LIKE', "%{$keyword}%")
                    ->orWhere('payer_email', 'LIKE', "%{$keyword}%")
                    ->orWhere('event_type', 'LIKE', "%{$keyword}%")
                    ->orWhere('order_id', 'LIKE', "%{$keyword}%")
                    ->orWhere('parent_school_id', 'LIKE', "%{$keyword}%");
            });
        }

        $result = $this->paginate($query, $page, $perPage);
        return $this->success($result, 'PayPal transactions retrieved successfully');
    }

    public function show($id = null)
    {
        $transaction = $this->paypalPayment->find($id);
        if (!$transaction) {
            return $this->error('PayPal transaction not found', Response::HTTP_NOT_FOUND);
        }

        return $this->success($transaction, 'PayPal transaction retrieved successfully');
    }

    /**
     * GET /api/v1/paypal-transactions/transaction/{transactionId}
     * Get transaction by PayPal transaction ID
     */
    public function getByTransactionId($transactionId = null)
    {
        $transaction = $this->paypalPayment->newQuery()
            ->where('transaction_id', $transactionId)
            ->first();

        if (!$transaction) {
            return $this->error('PayPal transaction not found', Response::HTTP_NOT_FOUND);
        }

        return $this->success($transaction, 'PayPal transaction retrieved successfully');
    }

    /**
     * GET /api/v1/paypal-transactions/export-csv
     * Export PayPal transactions to CSV file
     */
    public function exportCsv(): StreamedResponse
    {
        $keyword = $this->request->getGet('q');

        $query = $this->paypalPayment->newQuery()->orderBy('created_at', 'DESC');

        if ($keyword) {
            $query->where(function ($q) use ($keyword) {
                $q->where('transaction_id', 'LIKE', "%{$keyword}%")
                    ->orWhere('payer_email', 'LIKE', "%{$keyword}%")
                    ->orWhere('event_type', 'LIKE', "%{$keyword}%")
                    ->orWhere('order_id', 'LIKE', "%{$keyword}%")
                    ->orWhere('parent_school_id', 'LIKE', "%{$keyword}%");
            });
        }

        $transactions = $query->get()->toArray();

        $filename = 'paypal_transactions_' . date('Ymd_His') . '.csv';

        $headers = [
            'Content-Type' => 'text/csv',
            'Content-Disposition' => "attachment; filename=\"{$filename}\"",
            'Pragma' => 'no-cache',
            'Cache-Control' => 'must-revalidate, post-check=0, pre-check=0',
            'Expires' => '0',
        ];

        return ResponseFacade::streamDownload(function () use ($transactions) {
            $output = fopen('php://output', 'w');

            // CSV headers
            fputcsv($output, [
                'ID',
                'Transaction ID',
                'Order ID',
                'Parent School ID',
                'Email',
                'Amount',
                'Net Amount',
                'Currency',
                'Status',
                'Event Type',
                'Created At',
            ]);

            foreach ($transactions as $t) {
                $t = (array) $t; // Convert to array for consistent access
                fputcsv($output, [
                    $t['id'] ?? '',
                    $t['transaction_id'] ?? '',
                    $t['order_id'] ?? '',
                    $t['parent_school_id'] ?? '',
                    $t['payer_email'] ?? '',
                    $t['amount'] ?? '',
                    $t['net_amount'] ?? '',
                    $t['currency'] ?? '',
                    $t['status'] ?? '',
                    $t['event_type'] ?? '',
                    $t['created_at'] ?? '',
                ]);
            }

            fclose($output);
        }, $filename, $headers);
    }
}