@extends('layouts.user')

@section('title','Black Belt Certificate')

@section('content')
<div class="content" style="height: calc(100vh - 6.2rem); overflow-y: auto; overflow-x: hidden;">
    <div class="pb-3">
        <div class="row g-4">
            <div class="col-12">
                <!-- Page Header -->
                <div class="mb-4">
                    <div class="d-flex justify-content-between align-items-center">
                        <div>
                            <h2 class="mb-2">Black Belt Certificate</h2>
                            <h5 class="text-body-tertiary fw-semibold">Apply, pay and download your Black Belt certification</h5>
                        </div>
                        <a href="{{ route('user.dashboard', ['role' => $currentRoleSlug]) }}" class="btn btn-phoenix-secondary">
                            <span class="me-2" data-feather="arrow-left"></span>Back to Dashboard
                        </a>
                    </div>
                </div>

                <!-- Status Card -->
                <div class="row g-3 mb-4">
                    <div class="col-md-6">
                        <div class="card h-100 border-0 shadow-sm">
                            <div class="card-body">
                                <div class="d-flex align-items-center">
                                    <div class="flex-shrink-0">
                                        <div class="avatar avatar-xl bg-primary-subtle">
                                            <span class="text-primary" data-feather="award" style="width: 32px; height: 32px;"></span>
                                        </div>
                                    </div>
                                    <div class="flex-grow-1 ms-3">
                                        <h6 class="mb-1 text-muted">Certificate Status</h6>
                                        @if(auth()->user()->it_belt_payment === 1)
                                        <h4 class="mb-0 text-success">
                                            <span data-feather="check-circle" class="me-1" style="width: 20px; height: 20px;"></span>
                                            Available
                                        </h4>
                                        @else
                                        <h4 class="mb-0 text-warning">
                                            <span data-feather="clock" class="me-1" style="width: 20px; height: 20px;"></span>
                                            Pending Payment
                                        </h4>
                                        @endif
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                    
                    <div class="col-md-6">
                        <div class="card h-100 border-0 shadow-sm">
                            <div class="card-body">
                                <div class="d-flex align-items-center">
                                    <div class="flex-shrink-0">
                                        <div class="avatar avatar-xl bg-info-subtle">
                                            <span class="text-info" data-feather="user" style="width: 32px; height: 32px;"></span>
                                        </div>
                                    </div>
                                    <div class="flex-grow-1 ms-3">
                                        <h6 class="mb-1 text-muted">Applicant</h6>
                                        <h5 class="mb-0">{{ auth()->user()->fname }} {{ auth()->user()->lname }}</h5>
                                        <small class="text-muted">{{ auth()->user()->email }}</small>
                                    </div>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>

                <!-- Main Action Card -->
                <div class="card border-0 shadow-sm mb-4">
                    <div class="card-header bg-white border-bottom">
                        <div class="d-flex justify-content-between align-items-center">
                            <h5 class="mb-0">
                                <span data-feather="file-text" class="me-2"></span>
                                Certificate Application
                            </h5>
                            @if(auth()->user()->it_belt_payment === 1)
                            <button type="button" class="btn btn-success"
                                onclick="downloadCertificate({{auth()->user()->id}}, this)">
                                <span data-feather="download" class="me-1"></span>Download Certificate
                            </button>
                            @else
                            <button type="button" class="btn btn-primary"
                                onclick="showPaymentSection()">
                                <span data-feather="credit-card" class="me-1"></span>Get Black Belt Certificate
                            </button>
                            @endif
                        </div>
                    </div>
                    <div class="card-body">
                        @if(auth()->user()->it_belt_payment === 1)
                            <!-- Certificate Ready -->
                            <div class="text-center py-5">
                                <div class="mb-4">
                                    <span data-feather="check-circle" style="width: 80px; height: 80px;" class="text-success"></span>
                                </div>
                                <h4 class="mb-2">Your Certificate is Ready!</h4>
                                <p class="text-muted mb-4">Click the download button above to get your Black Belt Certificate</p>
                                <div class="d-inline-flex gap-2">
                                    <button type="button" class="btn btn-success btn-lg"
                                        onclick="downloadCertificate({{auth()->user()->id}}, this)">
                                        <span data-feather="download" class="me-2"></span>Download Now
                                    </button>
                                </div>
                            </div>
                        @else
                            <!-- Payment Section -->
                            @if(auth()->user()->primary_profile && in_array(auth()->user()->approved, [0,1]) && auth()->user()->paid == 1)
                                <div class="d-none" id="payment_for_bb_certificate_sec_1">
                                    <div class="alert alert-warning border-0 mb-4">
                                        <div class="d-flex align-items-start">
                                            <span data-feather="alert-triangle" class="me-2 flex-shrink-0" style="width: 24px; height: 24px;"></span>
                                            <div>
                                                <strong>Important Payment Instructions:</strong>
                                                <ul class="mb-0 mt-2">
                                                    <li>Do not refresh or close the page while payment is being processed</li>
                                                    <li>After completing payment via UPI app, return to this page</li>
                                                    <li>Wait for <strong>10 seconds</strong> for payment confirmation</li>
                                                </ul>
                                            </div>
                                        </div>
                                    </div>

                                    <!-- Payment Gateways -->
                                    <div class="text-center mb-4">
                                        <h6 class="text-muted mb-3">Accepted Payment Methods</h6>
                                        <div class="d-flex justify-content-center gap-3 flex-wrap mb-3">
                                            @foreach ($payment_gateways as $payment_gateway)
                                            <div>
                                                <img src="/{{ $payment_gateway->img_path }}" height="50" width="150"
                                                    class="img-fluid rounded border" alt="Payment Gateway" />
                                            </div>
                                            @endforeach
                                        </div>
                                        <p class="text-muted small mb-0">
                                            <span data-feather="info" style="width: 16px; height: 16px;"></span>
                                            Payment Gateway Taxes: <strong>2.5%</strong>
                                        </p>
                                    </div>

                                    <!-- Payment Form -->
                                    <form action="{{ url('certificate-payment') }}" method="post"
                                        id="certificatePaymentForm1" class="text-center">
                                        @csrf
                                        @if(isset($razorpay_order) && !empty($razorpay_order))
                                        <script src="https://checkout.razorpay.com/v1/checkout.js"
                                            data-key="{{ env('RAZORPAY_KEY') }}" data-amount="10000"
                                            data-buttontext="Proceed to Pay" data-name="India Taekwondo"
                                            data-description="India Taekwondo"
                                            data-image="https://indiataekwondo.com/wp-content/uploads/2020/01/logo-1.png"
                                            data-order_id="{{ is_array($razorpay_order) ? $razorpay_order['id'] : $razorpay_order->id }}"
                                            data-notes.merchant_order_id="reg_id_{{ date('Y-m-d H:i:s') }}"
                                            data-notes.purpose="Black Belt Certificate" data-notes.purpose_id="2"
                                            data-notes.user_id="{{auth()->user()->id}}"
                                            data-prefill.name="{{ auth()->user()->fname }} {{ auth()->user()->lname }}"
                                            data-prefill.email="{{ auth()->user()->email }}"
                                            data-prefill.contact="{{ auth()->user()->mobile }}"
                                            data-theme.color="#3874ff"></script>
                                        @else
                                        <div class="alert alert-danger border-0" role="alert">
                                            <div class="d-flex align-items-center">
                                                <span data-feather="x-circle" class="me-2"></span>
                                                <div>
                                                    Payment gateway is currently unavailable. Please try again later or contact support.
                                                </div>
                                            </div>
                                        </div>
                                        @endif
                                    </form>

                                    <div class="text-center mt-3">
                                        <button type="button" class="btn btn-phoenix-secondary"
                                            onclick="hidePaymentSection()">
                                            <span data-feather="x" class="me-1"></span>Cancel
                                        </button>
                                    </div>
                                </div>

                                <!-- Before Payment Message -->
                                <div id="before_payment_message">
                                    <div class="text-center py-4">
                                        <div class="mb-4">
                                            <span data-feather="credit-card" style="width: 80px; height: 80px;" class="text-primary"></span>
                                        </div>
                                        <h4 class="mb-2">Complete Payment to Download Certificate</h4>
                                        <p class="text-muted mb-4">Click the button above to proceed with the payment process</p>
                                        <div class="card border-0 bg-light mx-auto" style="max-width: 500px;">
                                            <div class="card-body">
                                                <h6 class="mb-3">What happens next?</h6>
                                                <ol class="text-start mb-0 ps-3">
                                                    <li class="mb-2">Click "Get Black Belt Certificate" button</li>
                                                    <li class="mb-2">Complete the payment through secure gateway</li>
                                                    <li class="mb-2">Wait for payment confirmation</li>
                                                    <li class="mb-0">Download your certificate instantly</li>
                                                </ol>
                                            </div>
                                        </div>
                                    </div>
                                </div>
                            @else
                                <!-- Eligibility Message -->
                                <div class="text-center py-5">
                                    <div class="mb-4">
                                        <span data-feather="info" style="width: 80px; height: 80px;" class="text-info"></span>
                                    </div>
                                    <h4 class="mb-2">Certificate Not Available</h4>
                                    <p class="text-muted mb-4">
                                        @if(!auth()->user()->primary_profile)
                                            Please complete your profile first
                                        @elseif(!in_array(auth()->user()->approved, [0,1]))
                                            Your profile needs to be approved
                                        @elseif(auth()->user()->paid != 1)
                                            Please complete the registration payment first
                                        @endif
                                    </p>
                                    <a href="{{ route('user.dashboard', ['role' => $currentRoleSlug]) }}" class="btn btn-phoenix-primary">
                                        <span data-feather="arrow-left" class="me-1"></span>Go to Dashboard
                                    </a>
                                </div>
                            @endif
                        @endif
                    </div>
                </div>
            </div>
        </div>
    </div>
</div>
    @endsection

    @push('scripts')
    <script>
        // Show payment section and hide before payment message
        function showPaymentSection() {
            const paymentSection = document.getElementById('payment_for_bb_certificate_sec_1');
            const beforeMessage = document.getElementById('before_payment_message');
            
            if (paymentSection) {
                paymentSection.classList.remove('d-none');
            }
            if (beforeMessage) {
                beforeMessage.classList.add('d-none');
            }
            
            // Smooth scroll to payment section
            try {
                if (paymentSection) {
                    const rect = paymentSection.getBoundingClientRect();
                    window.scrollTo({ top: rect.top + window.scrollY - 100, behavior: 'smooth' });
                }
            } catch (e) {
                console.error('Scroll error:', e);
            }
            
            // Reinitialize feather icons
            if (typeof feather !== 'undefined') {
                feather.replace();
            }
        }

        // Hide payment section and show before payment message
        function hidePaymentSection() {
            const paymentSection = document.getElementById('payment_for_bb_certificate_sec_1');
            const beforeMessage = document.getElementById('before_payment_message');
            
            if (paymentSection) {
                paymentSection.classList.add('d-none');
            }
            if (beforeMessage) {
                beforeMessage.classList.remove('d-none');
            }
        }

        // Placeholder JS wiring (can be replaced with dedicated module)
        (function () {
            const applyBtn = document.getElementById('bb_cert_apply_btn');
            const payBtn = document.getElementById('bb_cert_pay_btn');
            const downloadBtn = document.getElementById('bb_cert_download_btn');
            const statusText = document.getElementById('bb_cert_status_text');
            const timeline = document.getElementById('bb_cert_timeline');

            if (applyBtn) {
                applyBtn.addEventListener('click', () => {
                    statusText.textContent = 'Application Draft Saved (demo)';
                    payBtn.removeAttribute('disabled');
                    timeline.innerHTML = '<li>Application draft created just now.</li>';
                });
            }
            if (payBtn) {
                payBtn.addEventListener('click', () => {
                    statusText.textContent = 'Payment Completed (demo)';
                    downloadBtn.removeAttribute('disabled');
                    timeline.innerHTML += '<li>Payment processed just now.</li>';
                });
            }
            if (downloadBtn) {
                downloadBtn.addEventListener('click', () => {
                    alert('Demo: PDF download would trigger here.');
                });
            }
        })();

         // Enhanced certificate download function with error handling
        function downloadCertificate(userId, buttonElement) {
            if (!userId) {
                alert('Error: User ID not found. Please refresh the page and try again.');
                return;
            }

            // Show loading state
            const originalText = buttonElement.innerHTML;
            buttonElement.disabled = true;
            buttonElement.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Generating Certificate...';

            // Create proper download URL using Laravel route helper
            const downloadUrl = '{{ url("get_certificate") }}/' + userId;
            
            // Create a temporary iframe for the download to handle errors gracefully
            const iframe = document.createElement('iframe');
            iframe.style.display = 'none';
            iframe.src = downloadUrl;
            
            // Error handling for the iframe
            iframe.onload = function() {
                // Check if the response is an error by checking content type
                try {
                    const doc = iframe.contentDocument || iframe.contentWindow.document;
                    if (doc.body && (doc.body.innerText.includes('error') || 
                                   doc.body.innerText.includes('Unauthorized') ||
                                   doc.body.innerText.includes('Failed'))) {
                        throw new Error(doc.body.innerText);
                    }
                } catch (e) {
                    // Cross-origin error or successful download - assume success if we can't read the content
                    console.log('Download completed or cross-origin response');
                }
                
                // Reset button after a delay
                setTimeout(() => {
                    buttonElement.disabled = false;
                    buttonElement.innerHTML = originalText;
                    
                    // Remove the iframe after download
                    if (iframe.parentNode) {
                        iframe.parentNode.removeChild(iframe);
                    }
                }, 2000);
            };

            iframe.onerror = function() {
                alert('Certificate download failed. Please check your internet connection and try again.');
                buttonElement.disabled = false;
                buttonElement.innerHTML = originalText;
                
                if (iframe.parentNode) {
                    iframe.parentNode.removeChild(iframe);
                }
            };

            // Add iframe to DOM to trigger download
            document.body.appendChild(iframe);

            // Fallback: Direct window location change after a delay
            setTimeout(() => {
                if (buttonElement.disabled) {
                    try {
                        window.location.href = downloadUrl;
                        buttonElement.disabled = false;
                        buttonElement.innerHTML = originalText;
                    } catch (error) {
                        console.error('Fallback download error:', error);
                        alert('Certificate download failed. Please contact support if the issue persists.');
                        buttonElement.disabled = false;
                        buttonElement.innerHTML = originalText;
                    }
                }
            }, 5000);
        }

        // Global error handler for certificate downloads
        window.addEventListener('error', function(event) {
            if (event.filename && event.filename.includes('get_certificate')) {
                console.error('Certificate download error:', event.error);
                alert('Certificate download encountered an error. Please try again or contact support.');
            }
        });

        // Initialize feather icons on page load
        document.addEventListener('DOMContentLoaded', function() {
            if (typeof feather !== 'undefined') {
                feather.replace();
            }
        });
    </script>
    @endpush