<?php

namespace App\Http\Controllers\WarehouseManagement;

use App\Http\Controllers\Controller;
use App\Models\StockLog;
use App\Models\Menu;
use App\Models\Dealer;
use App\Models\Product;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Log;
use Yajra\DataTables\DataTables;
use Illuminate\Support\Facades\Gate;

class StockAuditController extends Controller
{
    public function index(Request $request)
    {
        $menu = Menu::where('link', 'stock-audit.index')->first();
        abort_if(!Gate::allows('view', $menu), 403);
        $dealers = Dealer::all();
        $products = Product::all();
        
        if ($request->ajax()) {
            Log::info('Stock audit ajax request received', [
                'filters' => $request->only(['dealer', 'product', 'change_type', 'date']),
                'user_id' => auth()->id(),
                'user_dealer_id' => auth()->user()->dealer_id
            ]);
            $data = StockLog::query()
                ->with([
                    'stock.product', 
                    'stock.dealer', 
                    'user.role',
                    'source'
                ])
                ->leftJoin('stocks', 'stock_logs.stock_id', '=', 'stocks.id')
                ->leftJoin('products', 'stocks.product_id', '=', 'products.id')
                ->leftJoin('dealers', 'stocks.dealer_id', '=', 'dealers.id')
                ->leftJoin('users', 'stock_logs.user_id', '=', 'users.id')
                ->select('stock_logs.*');
            
            // Filter berdasarkan dealer jika user bukan admin
            if (auth()->user()->dealer_id) {
                $data->whereHas('stock', function($query) {
                    $query->where('dealer_id', auth()->user()->dealer_id);
                });
            }
            
            // Apply filters from request
            if ($request->filled('dealer')) {
                $data->where('dealers.name', 'like', '%' . $request->dealer . '%');
            }
            
            if ($request->filled('product')) {
                $data->where('products.name', 'like', '%' . $request->product . '%');
            }
            
            if ($request->filled('change_type')) {
                $data->where('stock_logs.change_type', $request->change_type);
            }
            
            if ($request->filled('date')) {
                $data->whereDate('stock_logs.created_at', $request->date);
            }
            
            return DataTables::of($data)
                ->addIndexColumn()
                ->addColumn('product_name', function($row) {
                    return $row->stock->product->name ?? '-';
                })
                ->addColumn('dealer_name', function($row) {
                    return $row->stock->dealer->name ?? '-';
                })
                ->addColumn('change_type', function($row) {
                    $changeType = $row->change_type;
                    $class = match($changeType->value) {
                        'increase' => 'text-success',
                        'decrease' => 'text-danger',
                        'adjustment' => 'text-warning',
                        'no_change' => 'text-muted',
                        default => 'text-dark'
                    };
                    
                    return "<span class=\"font-weight-bold {$class}\">{$changeType->label()}</span>";
                })
                ->addColumn('quantity_change', function($row) {
                    $change = $row->quantity_change;
                    if ($change > 0) {
                        return "<span class=\"text-success\">+{$change}</span>";
                    } elseif ($change < 0) {
                        return "<span class=\"text-danger\">{$change}</span>";
                    } else {
                        return "<span class=\"text-muted\">0</span>";
                    }
                })
                ->addColumn('stock_before_after', function($row) {
                    return "{$row->previous_quantity} → {$row->new_quantity}";
                })
                ->addColumn('source_info', function($row) {
                    if ($row->source_type === 'App\\Models\\Mutation') {
                        $mutationNumber = $row->source ? $row->source->mutation_number : '-';
                        return "Mutasi: {$mutationNumber}";
                    } elseif ($row->source_type === 'App\\Models\\Opname') {
                        $opname_id = $row->source ? $row->source->id : '-';
                        return "Opname: #{$opname_id}";
                    } elseif ($row->source_type === 'App\\Models\\Transaction') 
                    {
                        $transaction_id = $row->source ? $row->source->id : '-';
                        return "Transaksi: #{$transaction_id}";
                    }else {
                        return $row->source_type ?? '-';
                    }
                })
                ->addColumn('user_name', function($row) {
                    return $row->user->name ?? '-';
                })
                ->addColumn('created_at', function($row) {
                    return $row->created_at->format('d M Y, H:i');
                })
                ->addColumn('action', function($row) {
                    $buttons = '<button type="button" class="btn btn-info btn-sm" onclick="showAuditDetail('.$row->id.')">
                                    Detail
                                </button>';
                    return $buttons;
                })
                // Filtering
                ->filterColumn('product_name', function($query, $keyword) {
                    $query->where('products.name', 'like', "%{$keyword}%");
                })
                ->filterColumn('dealer_name', function($query, $keyword) {
                    $query->where('dealers.name', 'like', "%{$keyword}%");
                })
                ->filterColumn('change_type', function($query, $keyword) {
                    $query->where('stock_logs.change_type', 'like', "%{$keyword}%");
                })
                ->filterColumn('source_info', function($query, $keyword) {
                    $query->where(function($q) use ($keyword) {
                        $q->where('stock_logs.source_type', 'like', "%{$keyword}%")
                          ->orWhere('stock_logs.description', 'like', "%{$keyword}%");
                    });
                })
                ->filterColumn('user_name', function($query, $keyword) {
                    $query->where('users.name', 'like', "%{$keyword}%");
                })
                ->filterColumn('created_at', function($query, $keyword) {
                    $query->whereDate('stock_logs.created_at', 'like', "%{$keyword}%");
                })
                // Order column mapping
                ->orderColumn('product_name', function($query, $order) {
                    return $query->orderBy('products.name', $order);
                })
                ->orderColumn('dealer_name', function($query, $order) {
                    return $query->orderBy('dealers.name', $order);
                })
                ->orderColumn('user_name', function($query, $order) {
                    return $query->orderBy('users.name', $order);
                })
                ->orderColumn('created_at', function($query, $order) {
                    return $query->orderBy('stock_logs.created_at', $order);
                })
                ->orderColumn('quantity_change', function($query, $order) {
                    return $query->orderBy('stock_logs.quantity_change', $order);
                })
                ->orderColumn('stock_before_after', function($query, $order) {
                    return $query->orderBy('stock_logs.previous_quantity', $order);
                })
                ->orderColumn('change_type', function($query, $order) {
                    return $query->orderBy('stock_logs.change_type', $order);
                })
                ->orderColumn('source_info', function($query, $order) {
                    return $query->orderBy('stock_logs.source_type', $order);
                })
                ->rawColumns(['change_type', 'quantity_change', 'action'])
                ->make(true);
        }

        return view('warehouse_management.stock_audit.index', compact('menu', 'dealers', 'products'));
    }

    public function getDetail(StockLog $stockLog)
    {
        try {
            $stockLog->load([
                'stock.product', 
                'stock.dealer', 
                'user.role',
                'source'
            ]);
            
            // Format data untuk response
            $stockLog->created_at_formatted = $stockLog->created_at->format('d M Y, H:i');
            $stockLog->change_type_label = $stockLog->change_type->label();
            
            // Detail source berdasarkan tipe
            $sourceDetail = null;
            if ($stockLog->source) {
                if ($stockLog->source_type === 'App\\Models\\Mutation') {
                    $mutation = $stockLog->source;
                    $mutation->load(['fromDealer', 'toDealer', 'requestedBy', 'approvedBy']);
                    
                    // Format approved_at date if exists
                    if ($mutation->approved_at) {
                        $mutation->approved_at_formatted = $mutation->approved_at->format('d M Y, H:i');
                    }
                    
                    $sourceDetail = [
                        'type' => 'mutation',
                        'data' => $mutation
                    ];
                } elseif ($stockLog->source_type === 'App\\Models\\StockOpname') {
                    $opname = $stockLog->source;
                    $opname->load(['dealer', 'user']);
                    $sourceDetail = [
                        'type' => 'opname',
                        'data' => $opname
                    ];
                }
            }
            
            return response()->json([
                'success' => true,
                'data' => $stockLog,
                'source_detail' => $sourceDetail
            ]);
            
        } catch (\Exception $e) {
            return response()->json([
                'success' => false,
                'message' => 'Gagal memuat detail audit: ' . $e->getMessage()
            ], 500);
        }
    }
}