<?php

namespace App\Http\Controllers\MasterData;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\Barang;
use App\Models\Kategori;
use App\Models\Penjualan;
use Illuminate\Support\Facades\Auth;
use Carbon\Carbon;
use Illuminate\Support\Facades\DB;
use App\Models\ListItemPembelian;
use App\Models\Pembelian;

class BarangController extends Controller
{
    private function handleFileUpload(Request $request)
    {
        if ($request->hasFile('gambar')) {
            $gambar = $request->file('gambar');
            $fileName = $this->generateFileName($gambar);
            $gambar->move(public_path('gambar'), $fileName);
            return $fileName;
        }
        return null;
    }

    private function generateFileName($file)
    {
        return time() . '.' . $file->getClientOriginalExtension();
    }

    public function index(Request $request)
    {
        // $data = DB::table('list_item_penjualan')->selectRaw("barang_id,SUM(qty) as jumlah_jual")
        // ->groupBy("barang_id")
        // ->get();
        // $pembelian = Pembelian::create([
        //     'operator' => Auth::user()->id,
        //     'no_transaksi' => "IDTRN1716529745",
        //     // 'total_harga'=> $request->total,
        //     // 'bayar'=> $request->bayar,
        //     // 'sisa'=> $request->sisa,
        //     'supplier_id'=> 1
        // ]);
        // foreach($data as $value){
        //     $barang = Barang::where('id', $value->barang_id)->first();
        
        //     ListItemPembelian::create([
        //         'pembelian_id' => $pembelian->id,
        //         'barang_id' => $barang->id, 
        //         'qty_beli' => $value->jumlah_jual,
        //         'harga_beli' => $barang->harga_beli,
        //         'harga_jual' => $barang->harga_jual,
        //         'nama_barang' => $barang->nama,
        //         'ukuran_barang' => $barang->ukuran
        //     ]);
        // }

        // die();
        $data = [
            'title' => 'Data Barang',
            'kategori' => Kategori::all(),
            'barang' => Barang::with("kategori")
            ->selectRaw("barang.*,barang.id as barang_id,(IFNULL(jumlah_beli,0)-IFNULL(jumlah_jual,0)) as stok_terbaru")
            ->leftJoin(DB::raw('(SELECT barang_id,SUM(qty_beli) as jumlah_beli from list_item_pembelian group by barang_id) as
               data_beli'), 
                function($join)
                {
                    $join->on('barang.id', '=', 'data_beli.barang_id');
                }
            )
            ->leftJoin(DB::raw('(SELECT barang_id,SUM(qty) as jumlah_jual from list_item_penjualan group by barang_id) as
               data_jual'), 
                function($join)
                {
                    $join->on('barang.id', '=', 'data_jual.barang_id');
                }
            )
            ->groupBy("barang.id")
            ->get()
        ];

        if (!$request->ajax() && $request->isMethod('get')) {
            
            $res_barang = [];
            foreach($data['barang'] as $item){
                $penjualans = Penjualan::join("list_item_penjualan","penjualan.id","penjualan_id")
                ->selectRaw("SUM(qty) as demand")
                ->where("barang_id",$item->id)
                ->whereYear("list_item_penjualan.created_at",date("Y")-1)
                ->first();
                
                $max = Penjualan::join("list_item_penjualan","penjualan.id","penjualan_id")
                ->selectRaw("SUM(qty) as qty_harian")
                ->where("barang_id",$item->id)
                ->whereYear("list_item_penjualan.created_at",date("Y")-1)
                ->groupBy(DB::raw("DATE_FORMAT(list_item_penjualan.created_at, '%Y-%m-%d')"))
                ->get();

                $harian = [];
                foreach($max as $a){
                    array_push($harian,$a->qty_harian);
                }
                if(count($harian) > 0){
                    $max_sales = max($harian);
                }else{
                    $max_sales = 1;
                }

                $demand = $penjualans->demand;
                $item->demand = $demand;
                $average = $demand/365;
                $item->average = round($average);
                $orderingCost = $item->biaya_pemesanan;
                $orderingCost = $orderingCost==0 || $orderingCost==NULL ?1:$orderingCost;
                $eoq_annual = sqrt((2 * $demand * $orderingCost ) / $item->holding_cost);
                $eoq_annual = $eoq_annual==0?1:$eoq_annual;
                $pemesanan = $demand/$eoq_annual;
                $safety_stock = ($max_sales * $item->lead_time_variance) - ($average * $item->lead_time);
                $rop = ($average* $item->lead_time) + $safety_stock ;
                $item->max_qty = $max_sales;
                $item->pemesanan = round($pemesanan);
                $item->eoq_annual = round($eoq_annual);
                $item->safety_stock = round($safety_stock);
                $item->rop = $rop;         
                array_push($res_barang,$item);
                $currentStockPerBarang[$item->nama] = $item->stok_terbaru;
                $safetyStockMonthly[$item->nama] = round($safety_stock);
    
                $update_barang = Barang::find($item->id);
                $update_barang->update([
                    'demand' => $demand,
                    'eoq_annual' => $eoq_annual,
                    'safety_stok' => $safety_stock,
                    'pemesanan' => $pemesanan,
                    'rop' => $rop,
                    'max_sales' => $max_sales
                ]);
    
    
            }
            $data['barang'] = $res_barang;
            return view('page.dashboard.barang.index', compact('data'));
        }

        if ($request->ajax() && $request->isMethod('get')) {
            $perPage = $request->input('per_page', 10);
            $query = Barang::query()->with('kategori');
        
            $searchTerm = $request->input('search');
        
            if ($searchTerm) {
                $query->where(function($q) use ($searchTerm) {
                    $q->where('kode', 'like', "%$searchTerm%")
                      ->orWhere('nama', 'like', "%$searchTerm%")
                      ->orWhere('ukuran', 'like', "%$searchTerm%")
                      ->orWhere('harga_beli', 'like', "%$searchTerm%")
                      ->orWhere('harga_jual', 'like', "%$searchTerm%")
                      ->orWhere('stok', 'like', "%$searchTerm%")
                      ->orWhere('kadaluarsa', 'like', "%$searchTerm%")
                      ->orWhere('id_kategori', 'like', "%$searchTerm%")
                      ->orWhere('created_at', 'like', "%$searchTerm%");
                });
            }

            $totalMonths = Penjualan::select(
                DB::raw('YEAR(created_at) as year'), 
                DB::raw('MONTH(created_at) as month'), 
                DB::raw('COUNT(*) as count')
            )
            ->groupBy('year', 'month')
            ->get();
            
            $totalItems = $totalMonths->sum('count');
            $totalPerbulanNow = $totalItems / $totalMonths->count();

            $totalPerbulanKemarin = Penjualan::whereMonth('created_at', '=', Carbon::now()->subMonth()->month)->count();

            $data = $query->paginate($perPage);
        
            if ($data->isEmpty()) {
                return response()->json(['message' => 'Tidak ada data!'], 404);
            }
        
            return response()->json([
                'message' => $data, 
                'totalPerbulanNow' => $totalPerbulanNow,
                'totalPerbulanKemarin' => $totalPerbulanKemarin
            ], 200);
        }               

        $gambar = $this->handleFileUpload($request);

        $kode = $request->kode;
        $checkKode = Barang::where('kode', $kode)->first();
        if ($checkKode) {
            return response()->json(['message' => 'Barang sudah ada!'], 200);
        }

        $create = Barang::create([
            'kode' => $kode,
            'nama' => $request->nama,
            'ukuran' => $request->ukuran,
            'harga_beli' => $request->harga_beli,
            'harga_jual' => $request->harga_jual,
            'stok' => $request->stok,
            'kadaluarsa' => $request->kadaluarsa,
            'demand' => $request->demand,
            'holding_cost' => $request->holding_cost,
            'biaya_pemesanan' => $request->biaya_pemesanan,
            'lead_time_variance' => $request->lead_time_variance,
            'lead_time' => $request->lead_time,
            'id_kategori' => $request->id_kategori,
            'gambar' => $gambar
        ]);

        if ($create) {
            return response()->json(['message' => 'Berhasil menambah data!'], 200);
        } else {
            return response()->json(['message' => 'Gagal menambah data!'], 404);
        }
    }

    public function update(Request $request, $id)
    {
        if ($request->ajax()) {
            $data = Barang::with('kategori')->findOrFail($id);
        
            if (!$data) {
                return response()->json(['message' => 'Data tidak ditemukan!'], 404);
            }
    
            if ($request->isMethod('get')) {
                return response()->json(['message' => $data], 200);
            }
    
            $data->update($request->only(['kode', 'id_kategori','nama', 'ukuran', 'harga_jual', 'harga_beli', 'stok', 'kadaluarsa', 'demand', 'biaya_pemesanan','holding_cost', 'lead_time_variance', 'lead_time', 'updated_at']));

            $gambar = $this->handleFileUpload($request);

            if ($gambar) {
                $data->gambar = $gambar;
                $data->save();
            }

            return response()->json(['message' => 'Berhasil update data!'], 200);
        }
    }

    public function delete(Request $request, $id)
    {
        if ($request->ajax()) {
            $data = Barang::findOrFail($id);
            if ($data->delete()) {
                return response()->json(['message' => 'Berhasil hapus data!'], 200);
            } else {
                return response()->json(['message' => 'Gagal hapus data!'], 404);
            }
        }
    }

    public function findBarcode($kode)
    {
        return response()->json(Barang::where('kode', $kode)->first());
    }
    
}