@extends('admin.layout.app')

@section('body')
    <div class="card card-page p-4">
        {{-- Flash alerts --}}
        @if (session('success'))
            <div class="alert alert-success">{{ session('success') }}</div>
        @endif
        @if (session('error'))
            <div class="alert alert-danger">{{ session('error') }}</div>
        @endif

        {{-- Validation summary --}}
        @if ($errors->any())
            <div class="alert alert-danger">
                <strong>There were some problems with your input:</strong>
                <ul class="mb-0">
                    @foreach ($errors->all() as $e)
                        <li>{{ $e }}</li>
                    @endforeach
                </ul>
            </div>
        @endif

        <div class="d-flex justify-content-between align-items-center mb-3">
            <div>
                <h4 class="mb-0"><i class="far fa-edit me-2"></i> Edit Fuel Expense</h4>
                <small class="text-muted">Update fuel spend, meter, and attachments</small>
            </div>
            <a href="{{ route('machinery-fuel-expenses.index') }}" class="btn btn-outline-primary">Back</a>
        </div>

        <form action="{{ route('machinery-fuel-expenses.update', $expense) }}" method="POST" enctype="multipart/form-data"
            novalidate>
            @csrf
            @method('PUT')

            <div class="row g-3">
                {{-- Machinery --}}
                <div class="col-md-6">
                    <label class="form-label">Machinery <span class="text-danger">*</span></label>
                    <select name="machinery_id" class="form-select @error('machinery_id') is-invalid @enderror" required>
                        @foreach ($machineries as $m)
                            <option value="{{ $m->id }}" @selected(old('machinery_id', $expense->machinery_id) == $m->id)>
                                {{ $m->name ?? '#' . $m->id }}
                            </option>
                        @endforeach
                    </select>
                    @error('machinery_id')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>

                {{-- Date --}}
                <div class="col-md-3">
                    <label class="form-label">Date <span class="text-danger">*</span></label>
                    <input type="date" name="spent_at" class="form-control @error('spent_at') is-invalid @enderror"
                        value="{{ old('spent_at', optional($expense->spent_at)->format('Y-m-d')) }}" required>
                    @error('spent_at')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>

                {{-- Vendor --}}
                <div class="col-md-3">
                    <label class="form-label">Vendor</label>
                    <input type="text" name="vendor" class="form-control @error('vendor') is-invalid @enderror"
                        value="{{ old('vendor', $expense->vendor) }}">
                    @error('vendor')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>

                {{-- Liters --}}
                <div class="col-md-3">
                    <label class="form-label">Liters <span class="text-danger">*</span></label>
                    <input type="number" step="0.01" name="quantity_liters" id="qtyLiters"
                        class="form-control @error('quantity_liters') is-invalid @enderror"
                        value="{{ old('quantity_liters', $expense->quantity_liters) }}" required>
                    @error('quantity_liters')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>

                {{-- Unit Price --}}
                <div class="col-md-3">
                    <label class="form-label">Unit Price <span class="text-danger">*</span></label>
                    <input type="number" step="0.01" name="unit_price" id="unitPrice"
                        class="form-control @error('unit_price') is-invalid @enderror"
                        value="{{ old('unit_price', $expense->unit_price) }}" required>
                    @error('unit_price')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>

                {{-- Amount (auto calc, read-only) --}}
                <div class="col-md-3">
                    <label class="form-label">Amount (auto)</label>
                    @php
                        $autoAmount =
                            (float) old('quantity_liters', $expense->quantity_liters) *
                            (float) old('unit_price', $expense->unit_price);
                    @endphp
                    <input type="number" step="0.01" id="amountAuto" class="form-control"
                        value="{{ number_format($autoAmount, 2, '.', '') }}" placeholder="Liters × Unit Price" readonly>
                </div>

                {{-- Meter Reading --}}
                <div class="col-md-3">
                    <label class="form-label">Meter Reading</label>
                    <input type="text" name="meter_reading"
                        class="form-control @error('meter_reading') is-invalid @enderror"
                        value="{{ old('meter_reading', $expense->meter_reading) }}" placeholder="Hour/Odometer">
                    @error('meter_reading')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>

                {{-- Notes --}}
                <div class="col-md-12">
                    <label class="form-label">Notes</label>
                    <textarea name="notes" class="form-control @error('notes') is-invalid @enderror" rows="3">{{ old('notes', $expense->notes) }}</textarea>
                    @error('notes')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>

                {{-- Existing Attachments --}}
                <div class="col-md-12">
                    <label class="form-label">Current Attachments</label>
                    @php
                        $existing = is_array($expense->attachments)
                            ? $expense->attachments
                            : (json_decode($expense->attachments ?? '[]', true) ?:
                            []);
                    @endphp
                    @if (empty($existing))
                        <p class="text-muted mb-2">No files.</p>
                    @else
                        <div class="d-flex flex-wrap gap-2 mb-2">
                            @foreach ($existing as $path)
                                @php
                                    $url = asset('storage/' . $path);
                                    $ext = strtolower(pathinfo($path, PATHINFO_EXTENSION));
                                    $isImg = in_array($ext, ['png', 'jpg', 'jpeg', 'gif', 'webp']);
                                    $isPdf = $ext === 'pdf';
                                @endphp
                                <div class="border rounded p-2 d-flex align-items-center gap-2">
                                    @if ($isImg)
                                        <img src="{{ $url }}"
                                            style="height:40px;width:40px;object-fit:cover;border-radius:4px;">
                                    @elseif($isPdf)
                                        <i class="far fa-file-pdf fa-2x text-danger"></i>
                                    @else
                                        <i class="far fa-file fa-2x text-secondary"></i>
                                    @endif
                                    <div class="d-flex align-items-center gap-2">
                                        <a href="{{ $url }}" target="_blank" class="btn btn-sm btn-outline-info">
                                            <i class="far fa-eye"></i>
                                        </a>
                                        <a href="{{ $url }}" download class="btn btn-sm btn-outline-dark">
                                            <i class="fas fa-download"></i>
                                        </a>
                                        <div class="form-check ms-2">
                                            <input class="form-check-input" type="checkbox" name="remove_existing[]"
                                                value="{{ $path }}" id="rm_{{ md5($path) }}">
                                            <label for="rm_{{ md5($path) }}"
                                                class="form-check-label small text-muted">Remove</label>
                                        </div>
                                    </div>
                                </div>
                            @endforeach
                        </div>
                    @endif
                </div>

                {{-- Add more attachments --}}
                <div class="col-md-12">
                    <label class="form-label">Add More Attachments</label>
                    <input type="file" name="attachments[]"
                        class="form-control @error('attachments.*') is-invalid @enderror" multiple
                        accept=".pdf,.png,.jpg,.jpeg,.gif,.webp,.doc,.docx,.xls,.xlsx,.ppt,.pptx,.txt">
                    @error('attachments.*')
                        <div class="invalid-feedback d-block">{{ $message }}</div>
                    @enderror
                </div>
            </div>

            <div class="mt-4 d-flex gap-2">
                <button class="btn btn-primary"><i class="fas fa-save me-2"></i> Update</button>
                <a href="{{ route('machinery-fuel-expenses.index') }}" class="btn btn-outline-secondary">Cancel</a>
            </div>
        </form>
    </div>

    {{-- quick auto-calc --}}
    <script>
        (function() {
            const q = document.getElementById('qtyLiters');
            const p = document.getElementById('unitPrice');
            const a = document.getElementById('amountAuto');

            function recalc() {
                const qty = parseFloat(q?.value) || 0;
                const price = parseFloat(p?.value) || 0;
                if (a) a.value = (qty * price).toFixed(2);
            }
            q?.addEventListener('input', recalc);
            p?.addEventListener('input', recalc);
            recalc();
        })();
    </script>
@endsection