@extends('layouts.app')

@section('title', 'Invoice #' . $invoice->invoice_number)
@section('page_title', 'Tax Invoice Overview')

@section('content')
<div class="container-fluid p-0" style="max-width: 1000px;">

    <!-- Action Bar -->
    <div class="d-flex justify-content-between align-items-center mb-4 no-print">
        <div>
            <a href="{{ route('invoices.index') }}" class="btn btn-outline-secondary btn-sm">
                <i class="bi bi-arrow-left me-1"></i> Back to Invoices
            </a>
        </div>
        <div class="d-flex gap-2">
            @if($invoice->status !== 'cancelled' && $invoice->balance_due > 0)
                <button type="button" class="btn btn-success btn-sm" data-bs-toggle="modal" data-bs-target="#paymentModal">
                    <i class="bi bi-cash-stack me-1"></i> Record Payment
                </button>
            @endif

            <a href="{{ route('invoices.print', $invoice) }}" target="_blank" class="btn btn-primary btn-sm">
                <i class="bi bi-printer me-1"></i> Print / Download GST Invoice
            </a>

            @if($invoice->status !== 'cancelled')
                <form action="{{ route('invoices.cancel', $invoice) }}" method="POST" onsubmit="return confirm('Are you sure you want to cancel this invoice? Stock will be automatically returned to inventory.');">
                    @csrf
                    <button type="submit" class="btn btn-outline-danger btn-sm">
                        <i class="bi bi-x-circle me-1"></i> Cancel Invoice
                    </button>
                </form>
            @endif
        </div>
    </div>

    <!-- Invoice Sheet Preview -->
    <div class="card border-0 shadow-sm p-4 p-md-5 bg-white">

        <!-- Top Header & Status -->
        <div class="d-flex justify-content-between align-items-start border-bottom pb-4 mb-4">
            <div>
                <h3 class="fw-bold text-primary mb-1">{{ $company->company_name }}</h3>
                <div class="text-muted small">{{ $company->address }}, {{ $company->city }}, {{ $company->state }} - {{ $company->pincode }}</div>
                <div class="small mt-1">
                    <strong>GSTIN:</strong> <span class="font-monospace fw-bold">{{ $company->gstin }}</span> |
                    <strong>State:</strong> {{ $company->state }} (State Code: <span class="fw-bold">{{ $company->state_code }}</span>)
                </div>
                <div class="small text-muted">Phone: {{ $company->phone }} | Email: {{ $company->email }}</div>
            </div>
            <div class="text-end">
                <span class="badge bg-primary fs-6 px-3 py-2 text-uppercase mb-2">TAX INVOICE</span>
                <div class="h4 fw-bold mb-0 text-dark">{{ $invoice->invoice_number }}</div>
                <div class="text-muted small">Date: <strong>{{ $invoice->invoice_date->format('d/m/Y') }}</strong></div>
                @if($invoice->due_date)
                    <div class="text-muted small">Due Date: <strong>{{ $invoice->due_date->format('d/m/Y') }}</strong></div>
                @endif
                <div class="mt-2">
                    @if($invoice->status == 'cancelled')
                        <span class="badge bg-danger">CANCELLED (Stock Reverted)</span>
                    @else
                        <span class="badge {{ $invoice->payment_badge_class }}">
                            {{ ucfirst(str_replace('_', ' ', $invoice->payment_status)) }}
                        </span>
                    @endif
                </div>
            </div>
        </div>

        <!-- Bill To / Ship To / Place of Supply Details -->
        <div class="row g-4 mb-4">
            <div class="col-md-7">
                <div class="p-3 bg-light rounded border h-100">
                    <span class="text-uppercase fw-bold text-muted small d-block mb-1">Details of Receiver (Billed To):</span>
                    <h6 class="fw-bold mb-1 text-dark">{{ $invoice->party_name }}</h6>
                    @if($invoice->party && $invoice->party->billing_address)
                        <div class="small text-muted mb-2">{{ $invoice->party->billing_address }}</div>
                    @endif
                    <div class="small">
                        <strong>GSTIN / UIN:</strong>
                        <span class="font-monospace fw-bold">{{ $invoice->party_gstin ?: 'Unregistered (Consumer B2C)' }}</span>
                    </div>
                    <div class="small text-muted">
                        <strong>State:</strong> {{ $invoice->place_of_supply_state }} |
                        <strong>State Code:</strong> <span class="fw-bold">{{ $invoice->place_of_supply_code }}</span>
                    </div>
                </div>
            </div>

            <div class="col-md-5">
                <div class="p-3 bg-light rounded border h-100">
                    <span class="text-uppercase fw-bold text-muted small d-block mb-1">Tax & Supply Determination:</span>
                    <div class="small mb-1">
                        <strong>Place of Supply:</strong>
                        <span class="fw-semibold">{{ $invoice->place_of_supply_state }} [{{ $invoice->place_of_supply_code }}]</span>
                    </div>
                    <div class="small mb-2">
                        <strong>Transaction Type:</strong>
                        @if($invoice->is_inter_state)
                            <span class="badge bg-primary">Inter-State (IGST 100%)</span>
                        @else
                            <span class="badge bg-success">Intra-State (CGST 50% + SGST 50%)</span>
                        @endif
                    </div>
                    <div class="small text-muted">
                        Reverse Charge (RCM): <strong>No</strong>
                    </div>
                </div>
            </div>
        </div>

        <!-- Invoice Items Table -->
        <div class="table-responsive mb-4">
            <table class="table table-bordered align-middle mb-0">
                <thead class="table-light text-center">
                    <tr>
                        <th style="width: 5%;">#</th>
                        <th style="width: 35%;" class="text-start">Description of Goods</th>
                        <th style="width: 10%;">HSN Code</th>
                        <th style="width: 8%;">Qty</th>
                        <th style="width: 12%;" class="text-end">Rate (₹)</th>
                        <th style="width: 12%;" class="text-end">Taxable Value (₹)</th>
                        @if($invoice->is_inter_state)
                            <th style="width: 8%;">IGST</th>
                        @else
                            <th style="width: 8%;">CGST</th>
                            <th style="width: 8%;">SGST</th>
                        @endif
                        <th style="width: 12%;" class="text-end">Total (₹)</th>
                    </tr>
                </thead>
                <tbody>
                    @foreach($invoice->items as $idx => $item)
                        <tr>
                            <td class="text-center text-muted">{{ $idx + 1 }}</td>
                            <td>
                                <div class="fw-bold text-dark">{{ $item->product_name }}</div>
                                @if($item->discount_percent > 0)
                                    <small class="text-muted">Discount: {{ $item->discount_percent }}% (₹{{ number_format($item->discount_amount, 2) }})</small>
                                @endif
                            </td>
                            <td class="text-center font-monospace">{{ $item->hsn_code }}</td>
                            <td class="text-center">{{ number_format($item->quantity, 0) }} {{ $item->unit_code }}</td>
                            <td class="text-end">₹{{ number_format($item->unit_price, 2) }}</td>
                            <td class="text-end fw-semibold">₹{{ number_format($item->taxable_value, 2) }}</td>
                            @if($invoice->is_inter_state)
                                <td class="text-center">
                                    <span class="small">{{ $item->igst_rate }}%</span>
                                    <div class="text-muted" style="font-size: 0.75rem;">₹{{ number_format($item->igst_amount, 2) }}</div>
                                </td>
                            @else
                                <td class="text-center">
                                    <span class="small">{{ $item->cgst_rate }}%</span>
                                    <div class="text-muted" style="font-size: 0.75rem;">₹{{ number_format($item->cgst_amount, 2) }}</div>
                                </td>
                                <td class="text-center">
                                    <span class="small">{{ $item->sgst_rate }}%</span>
                                    <div class="text-muted" style="font-size: 0.75rem;">₹{{ number_format($item->sgst_amount, 2) }}</div>
                                </td>
                            @endif
                            <td class="text-end fw-bold">₹{{ number_format($item->total_amount, 2) }}</td>
                        </tr>
                    @endforeach
                </tbody>
            </table>
        </div>

        <!-- Totals Breakdown & Amount in Words -->
        <div class="row g-4 mb-4">
            <div class="col-md-7">
                <div class="p-3 bg-light rounded border mb-3">
                    <span class="text-uppercase fw-bold text-muted small d-block mb-1">Invoice Value in Words:</span>
                    <div class="fw-bold text-dark">{{ $amountInWords }}</div>
                </div>

                <!-- Statutory GST HSN Breakdown Table -->
                <div class="table-responsive">
                    <table class="table table-bordered table-sm text-center mb-0" style="font-size: 0.8rem;">
                        <thead class="table-light">
                            <tr>
                                <th>HSN/SAC</th>
                                <th class="text-end">Taxable Val</th>
                                @if($invoice->is_inter_state)
                                    <th>IGST Rate</th>
                                    <th class="text-end">IGST Amt</th>
                                @else
                                    <th>CGST Rate</th>
                                    <th class="text-end">CGST Amt</th>
                                    <th>SGST Rate</th>
                                    <th class="text-end">SGST Amt</th>
                                @endif
                                <th class="text-end">Total Tax</th>
                            </tr>
                        </thead>
                        <tbody>
                            @foreach($hsnSummary as $hsnItem)
                                <tr>
                                    <td class="font-monospace fw-semibold">{{ $hsnItem['hsn'] }}</td>
                                    <td class="text-end">₹{{ number_format($hsnItem['taxable'], 2) }}</td>
                                    @if($invoice->is_inter_state)
                                        <td>{{ $hsnItem['igst_rate'] }}%</td>
                                        <td class="text-end">₹{{ number_format($hsnItem['igst_amount'], 2) }}</td>
                                    @else
                                        <td>{{ $hsnItem['cgst_rate'] }}%</td>
                                        <td class="text-end">₹{{ number_format($hsnItem['cgst_amount'], 2) }}</td>
                                        <td>{{ $hsnItem['sgst_rate'] }}%</td>
                                        <td class="text-end">₹{{ number_format($hsnItem['sgst_amount'], 2) }}</td>
                                    @endif
                                    <td class="text-end fw-bold">₹{{ number_format($hsnItem['total_tax'], 2) }}</td>
                                </tr>
                            @endforeach
                        </tbody>
                    </table>
                </div>
            </div>

            <div class="col-md-5">
                <div class="border rounded p-3">
                    <table class="table table-sm table-borderless mb-0">
                        <tr>
                            <td class="text-muted">Total Taxable Value:</td>
                            <td class="text-end fw-semibold">₹{{ number_format($invoice->taxable_amount, 2) }}</td>
                        </tr>
                        @if($invoice->is_inter_state)
                            <tr>
                                <td class="text-primary">Integrated GST (IGST):</td>
                                <td class="text-end text-primary fw-semibold">₹{{ number_format($invoice->igst_amount, 2) }}</td>
                            </tr>
                        @else
                            <tr>
                                <td class="text-muted">Central GST (CGST):</td>
                                <td class="text-end fw-semibold">₹{{ number_format($invoice->cgst_amount, 2) }}</td>
                            </tr>
                            <tr>
                                <td class="text-muted">State GST (SGST):</td>
                                <td class="text-end fw-semibold">₹{{ number_format($invoice->sgst_amount, 2) }}</td>
                            </tr>
                        @endif
                        <tr>
                            <td class="text-muted">Total Tax:</td>
                            <td class="text-end fw-semibold">₹{{ number_format($invoice->total_tax_amount, 2) }}</td>
                        </tr>
                        @if($invoice->round_off != 0)
                            <tr>
                                <td class="text-muted">Round Off:</td>
                                <td class="text-end text-muted">{{ $invoice->round_off >= 0 ? '+' : '' }}₹{{ number_format($invoice->round_off, 2) }}</td>
                            </tr>
                        @endif
                        <tr class="border-top border-2">
                            <td class="fw-bold fs-5 text-dark pt-2">Grand Total:</td>
                            <td class="text-end fw-bold fs-5 text-primary pt-2">₹{{ number_format($invoice->grand_total, 2) }}</td>
                        </tr>
                        <tr>
                            <td class="text-success fw-semibold">Amount Paid:</td>
                            <td class="text-end text-success fw-semibold">₹{{ number_format($invoice->paid_amount, 2) }}</td>
                        </tr>
                        <tr class="border-top">
                            <td class="text-danger fw-bold">Balance Due:</td>
                            <td class="text-end text-danger fw-bold fs-6">₹{{ number_format($invoice->balance_due, 2) }}</td>
                        </tr>
                    </table>
                </div>
            </div>
        </div>

        <!-- Bank Details, Terms & Signatory -->
        <div class="row g-4 border-top pt-4 mt-2">
            <div class="col-md-6">
                <h6 class="fw-bold small text-uppercase text-muted mb-2">Bank Remittance Details:</h6>
                <div class="small">
                    <strong>Bank Name:</strong> {{ $company->bank_name ?? 'HDFC Bank Ltd' }}<br>
                    <strong>A/C No:</strong> <span class="font-monospace">{{ $company->account_no ?? '50200012345678' }}</span><br>
                    <strong>IFSC Code:</strong> <span class="font-monospace">{{ $company->ifsc_code ?? 'HDFC0001234' }}</span>
                </div>
                <div class="small text-muted mt-3">
                    <strong>Terms & Conditions:</strong><br>
                    {!! nl2br(e($company->terms)) !!}
                </div>
            </div>

            <div class="col-md-6 text-end d-flex flex-column justify-content-between">
                <div>
                    <span class="small text-muted">For <strong>{{ $company->company_name }}</strong></span>
                </div>
                <div class="pt-5">
                    <div class="border-top d-inline-block pt-1 px-4 text-center">
                        <small class="fw-bold text-dark d-block">Authorized Signatory</small>
                    </div>
                </div>
            </div>
        </div>

    </div>
</div>

<!-- Record Payment Modal -->
@if($invoice->status !== 'cancelled' && $invoice->balance_due > 0)
<div class="modal fade" id="paymentModal" tabindex="-1">
    <div class="modal-dialog">
        <div class="modal-content">
            <form action="{{ route('payments.store') }}" method="POST">
                @csrf
                <input type="hidden" name="party_id" value="{{ $invoice->party_id }}">
                <input type="hidden" name="invoice_id" value="{{ $invoice->id }}">
                <input type="hidden" name="type" value="receipt">

                <div class="modal-header">
                    <h5 class="modal-title fw-bold">Record Payment for Invoice #{{ $invoice->invoice_number }}</h5>
                    <button type="button" class="btn-close" data-bs-dismiss="modal"></button>
                </div>
                <div class="modal-body">
                    <div class="mb-3">
                        <label class="form-label fw-semibold">Payment Date <span class="text-danger">*</span></label>
                        <input type="date" name="payment_date" class="form-control" value="{{ date('Y-m-d') }}" required>
                    </div>

                    <div class="mb-3">
                        <label class="form-label fw-semibold">Amount Received (₹) <span class="text-danger">*</span></label>
                        <div class="input-group">
                            <span class="input-group-text">₹</span>
                            <input type="number" step="0.01" max="{{ $invoice->balance_due }}" name="amount" class="form-control" value="{{ $invoice->balance_due }}" required>
                        </div>
                        <small class="text-muted">Balance Due: ₹{{ number_format($invoice->balance_due, 2) }}</small>
                    </div>

                    <div class="mb-3">
                        <label class="form-label fw-semibold">Payment Mode <span class="text-danger">*</span></label>
                        <select name="payment_mode" class="form-select" required>
                            <option value="bank_transfer">Bank Transfer (NEFT/RTGS/IMPS)</option>
                            <option value="upi">UPI / Online</option>
                            <option value="cash">Cash</option>
                            <option value="cheque">Cheque</option>
                        </select>
                    </div>

                    <div class="mb-3">
                        <label class="form-label fw-semibold">Reference / Transaction Number</label>
                        <input type="text" name="reference_number" class="form-control" placeholder="e.g. UTR1234567890 or Cheque #">
                    </div>

                    <div class="mb-3">
                        <label class="form-label fw-semibold">Notes</label>
                        <textarea name="notes" rows="2" class="form-control" placeholder="Optional notes..."></textarea>
                    </div>
                </div>
                <div class="modal-footer">
                    <button type="button" class="btn btn-secondary" data-bs-dismiss="modal">Cancel</button>
                    <button type="submit" class="btn btn-success fw-semibold">Save Payment</button>
                </div>
            </form>
        </div>
    </div>
</div>
@endif

@endsection