@extends('garage.layouts.app')

@section('title', 'Create Inventory Adjustment')

@push('scripts')
<script>
let adjustmentItems = [];

function addItem() {
    const partId = document.getElementById('partId').value;
    const quantityBefore = parseInt(document.getElementById('quantityBefore').value) || 0;
    const quantityAfter = parseInt(document.getElementById('quantityAfter').value) || 0;
    const unitCost = parseFloat(document.getElementById('unitCost').value) || 0;

    if (!partId) {
        alert('Please select a part');
        return;
    }

    const quantityAdjusted = quantityAfter - quantityBefore;

    const item = {
        part_id: partId,
        quantity_before: quantityBefore,
        quantity_after: quantityAfter,
        quantity_adjusted: quantityAdjusted,
        unit_cost: unitCost,
        total_value: Math.abs(quantityAdjusted) * unitCost
    };

    adjustmentItems.push(item);
    updateItemsTable();
    resetItemForm();
}

function removeItem(index) {
    adjustmentItems.splice(index, 1);
    updateItemsTable();
}

function updateItemsTable() {
    const tbody = document.getElementById('itemsTableBody');
    tbody.innerHTML = '';
    let total = 0;

    adjustmentItems.forEach((item, index) => {
        const row = document.createElement('tr');
        const partName = document.querySelector(`#partId option[value="${item.part_id}"]`).textContent;
        const quantityAdjusted = item.quantity_after - item.quantity_before;
        const adjustmentClass = quantityAdjusted > 0 ? 'text-success' : quantityAdjusted < 0 ? 'text-danger' : 'text-muted';
        const adjustmentSign = quantityAdjusted > 0 ? '+' : '';
        
        total += item.total_value;
        
        row.innerHTML = `
            <td>${partName}</td>
            <td>${item.quantity_before}</td>
            <td>${item.quantity_after}</td>
            <td class="${adjustmentClass}">${adjustmentSign}${quantityAdjusted}</td>
            <td>PKR ${item.unit_cost.toFixed(2)}</td>
            <td>PKR ${item.total_value.toFixed(2)}</td>
            <td>
                <button type="button" class="btn btn-sm btn-outline-danger" onclick="removeItem(${index})">
                    <i class="bi bi-trash"></i>
                </button>
            </td>
        `;
        tbody.appendChild(row);
    });

    document.getElementById('totalValue').textContent = total.toFixed(2);
}

function resetItemForm() {
    document.getElementById('partId').value = '';
    document.getElementById('quantityBefore').value = '0';
    document.getElementById('quantityAfter').value = '0';
    document.getElementById('unitCost').value = '';
}

document.getElementById('partId').addEventListener('change', function() {
    const partId = this.value;
    if (partId) {
        // Fetch current stock for this part
        fetch(`/garage/api/parts/${partId}/stock`)
            .then(response => response.json())
            .then(data => {
                if (data.stock_quantity !== undefined) {
                    document.getElementById('quantityBefore').value = data.stock_quantity;
                }
            })
            .catch(() => {
                // If API doesn't exist, just leave it
            });
    }
});
</script>
@endpush

@section('content')
<div class="row">
    <div class="col-12">
        <div class="card">
            <div class="card-header d-flex align-items-center justify-content-between">
                <h5 class="card-title mb-0"><i class="bi bi-clipboard-data me-2"></i>Create Inventory Adjustment</h5>
                <a href="{{ route('garage.inventory-adjustments.index') }}" class="btn btn-sm btn-outline-secondary">
                    <i class="bi bi-arrow-left me-1"></i>Back to List
                </a>
            </div>
            <div class="card-body">
                <form method="POST" action="{{ route('garage.inventory-adjustments.store') }}" id="adjustmentForm">
                    @csrf

                    <div class="row mb-4">
                        <div class="col-md-6">
                            <h6 class="mb-3 text-muted">Adjustment Information</h6>
                            <div class="mb-3">
                                <label class="form-label">Adjustment Date <span class="text-danger">*</span></label>
                                <input type="date" class="form-control @error('adjustment_date') is-invalid @enderror" name="adjustment_date" value="{{ old('adjustment_date', date('Y-m-d')) }}" required>
                                @error('adjustment_date')<div class="invalid-feedback">{{ $message }}</div>@enderror
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Adjustment Type <span class="text-danger">*</span></label>
                                <select class="form-select @error('adjustment_type') is-invalid @enderror" name="adjustment_type" required>
                                    <option value="increase" {{ old('adjustment_type') === 'increase' ? 'selected' : '' }}>Increase</option>
                                    <option value="decrease" {{ old('adjustment_type') === 'decrease' ? 'selected' : '' }}>Decrease</option>
                                    <option value="correction" {{ old('adjustment_type', 'correction') === 'correction' ? 'selected' : '' }}>Correction</option>
                                </select>
                                @error('adjustment_type')<div class="invalid-feedback">{{ $message }}</div>@enderror
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Reason</label>
                                <textarea class="form-control @error('reason') is-invalid @enderror" name="reason" rows="2">{{ old('reason') }}</textarea>
                                @error('reason')<div class="invalid-feedback">{{ $message }}</div>@enderror
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Notes</label>
                                <textarea class="form-control @error('notes') is-invalid @enderror" name="notes" rows="2">{{ old('notes') }}</textarea>
                                @error('notes')<div class="invalid-feedback">{{ $message }}</div>@enderror
                            </div>
                        </div>
                        <div class="col-md-6">
                            <h6 class="mb-3 text-muted">Add Part</h6>
                            <div class="mb-3">
                                <label class="form-label">Part <span class="text-danger">*</span></label>
                                <select class="form-select" id="partId">
                                    <option value="">Select Part</option>
                                    @foreach($parts as $part)
                                    <option value="{{ $part->id }}" data-cost="{{ $part->cost_price }}">{{ $part->name }} (Stock: {{ $part->stock_quantity }})</option>
                                    @endforeach
                                </select>
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Quantity Before</label>
                                <input type="number" class="form-control" id="quantityBefore" value="0" min="0">
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Quantity After <span class="text-danger">*</span></label>
                                <input type="number" class="form-control" id="quantityAfter" value="0" min="0" required>
                            </div>
                            <div class="mb-3">
                                <label class="form-label">Unit Cost <span class="text-danger">*</span></label>
                                <div class="input-group">
                                    <span class="input-group-text">PKR</span>
                                    <input type="number" step="0.01" class="form-control" id="unitCost" min="0" required>
                                </div>
                            </div>
                            <button type="button" class="btn btn-primary" onclick="addItem()">
                                <i class="bi bi-plus-lg me-1"></i>Add Part
                            </button>
                        </div>
                    </div>

                    <div class="mb-4">
                        <h6 class="mb-3">Adjustment Items</h6>
                        <div class="table-responsive">
                            <table class="table table-bordered">
                                <thead class="table-light">
                                    <tr>
                                        <th>Part</th>
                                        <th>Qty Before</th>
                                        <th>Qty After</th>
                                        <th>Adjusted</th>
                                        <th>Unit Cost</th>
                                        <th>Total Value</th>
                                        <th>Action</th>
                                    </tr>
                                </thead>
                                <tbody id="itemsTableBody">
                                    <tr>
                                        <td colspan="7" class="text-center text-muted">No items added yet</td>
                                    </tr>
                                </tbody>
                                <tfoot>
                                    <tr>
                                        <td colspan="5" class="text-end fw-bold">Total Value:</td>
                                        <td class="fw-bold">$<span id="totalValue">0.00</span></td>
                                        <td></td>
                                    </tr>
                                </tfoot>
                            </table>
                        </div>
                        <input type="hidden" name="items" id="itemsInput" value="">
                    </div>

                    <div class="d-flex justify-content-end gap-2 mt-4">
                        <a href="{{ route('garage.inventory-adjustments.index') }}" class="btn btn-secondary">Cancel</a>
                        <button type="submit" class="btn btn-primary" onclick="if(adjustmentItems.length === 0) { alert('Please add at least one item'); return false; } document.getElementById('itemsInput').value = JSON.stringify(adjustmentItems);">
                            <i class="bi bi-check-lg me-1"></i>Create Adjustment
                        </button>
                    </div>
                </form>
            </div>
        </div>
    </div>
</div>
@endsection