<?php

namespace App\Http\Controllers;

use App\Models\Transaksi;
use App\Models\ItemTransaksi;
use App\Models\Item;
use App\Models\Sales;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class TransaksiController extends Controller
{
    public function index(Request $request)
    {
        $limit = $request->query('limit', 10);
        $page = $request->query('page', 1);
        $startDate = $request->query('start_date');
        $endDate = $request->query('end_date');
        $search = $request->query('search');

        $query = Transaksi::with(['kasir', 'sales', 'itemTransaksi.produk']);

        // Filter berdasarkan interval tanggal
        if ($startDate && $endDate) {
            $query->whereBetween('created_at', [
                Carbon::parse($startDate)->startOfDay(),
                Carbon::parse($endDate)->endOfDay()
            ]);
        }
        // Default: hanya transaksi hari ini
        elseif (!$startDate && !$endDate) {
            $today = Carbon::today();
            $query->whereDate('created_at', $today);
        }

        // Search berdasarkan kode transaksi atau nama pelanggan
        if ($search) {
            $query->where(function ($q) use ($search) {
                $q->where('kode_transaksi', 'like', '%' . $search . '%')
                  ->orWhere('nama_pembeli', 'like', '%' . $search . '%');
            });
        }

        $query->latest();
        $transaksi = $query->paginate($limit, ['*'], 'page', $page);

        // Transform data
        $transaksi->getCollection()->transform(function ($transaksi) {
            $transaksi->total_items = $transaksi->itemTransaksi->count();
            $transaksi->tanggal = $transaksi->created_at->format('d/m/Y H:i');
            $transaksi->pendapatan = $transaksi->total_harga ?? 0;
            
            return $transaksi;
        });

        return response()->json([
            'data' => $transaksi->items(),
            'pagination' => [
                'current_page' => $transaksi->currentPage(),
                'last_page' => $transaksi->lastPage(),
                'per_page' => $transaksi->perPage(),
                'total' => $transaksi->total(),
                'from' => $transaksi->firstItem(),
                'to' => $transaksi->lastItem(),
            ]
        ]);
    }

    // Detail transaksi
    public function show($id)
    {
        $transaksi = Transaksi::with([
            'kasir', 
            'sales', 
            'itemTransaksi.produk',
            'itemTransaksi' => function ($query) {
                $query->orderBy('created_at', 'asc');
            }
        ])->findOrFail($id);

        $transaksi->total_items = $transaksi->itemTransaksi->count();
        $transaksi->tanggal = $transaksi->created_at->format('d/m/Y H:i');
        $transaksi->pendapatan = $transaksi->total_harga ?? 0;

        return response()->json($transaksi);
    }

    // Membuat transaksi baru
    public function store(Request $request)
    {
        $kasir = $request->user();
        if (!$kasir) {
            return response()->json(['error' => 'Unauthorized'], 401);
        }

        $request->validate([
            'id_sales'           => 'required|exists:sales,id',
            'nama_pembeli'       => 'required|string',
            'no_hp'              => 'required|string',
            'alamat'             => 'required|string',
            'ongkos_bikin'       => 'nullable|numeric|min:0',
            'total_harga'        => 'required|numeric',
            'items'              => 'required|array',
            'items.*.kode_item'    => 'required|exists:items,id|numeric',
            'items.*.harga_deal' => 'required|numeric',
        ]);

        DB::beginTransaction();
        try {

            $sales = Sales::find($request->id_sales);

            $transaksi = Transaksi::create([
                'kode_transaksi' => 'belum pak',
                'id_kasir'     => $kasir->id,
                'id_sales'     => $request->id_sales,
                'nama_sales'   => $sales->nama ?? 'N/A',
                'nama_pembeli' => $request->nama_pembeli,
                'no_hp'        => $request->no_hp,
                'alamat'       => $request->alamat,
                'ongkos_bikin' => $request->ongkos_bikin ?? 0,
                'total_harga'  => $request->total_harga,
            ]);

            foreach ($request->items as $it) {
                // TODO: ubah saat transaksi pake kode_item
                // $item = Item::where('kode_item', $it['kode_item'])->first();
                // if (!$item) {
                //     throw new \Exception("Item dengan kode_item {$it['kode_item']} tidak ditemukan.");
                // }
                $item = Item::where('id',$it['kode_item'])->with('produk')->first();

                ItemTransaksi::create([
                    'id_transaksi' => $transaksi->id,
                    'id_produk'      => $item->produk->id,
                    'harga_deal'   => $it['harga_deal'],
                    'posisi_asal'  => $it['posisi'],
                ]);

                $item->forceDelete();
            }

            DB::commit();
            return response()->json(
                $transaksi->load(['itemTransaksi.produk.foto', 'kasir', 'sales']),
                201
            );
        } catch (\Exception $e) {
            DB::rollBack();
            return response()->json([
                'error' => $e->getMessage(),
                'trace' => $e->getTrace()
            ], 500);
        }
    }


    // Update transaksi
    public function update(Request $request, $id)
    {
        $transaksi = Transaksi::findOrFail($id);

        $transaksi->update($request->only([
            'id_sales',
            'nama_sales',
            'no_hp',
            'alamat',
            'ongkos_bikin',
            'total_harga'
        ]));

        return response()->json($transaksi);
    }

    // Hapus transaksi
    public function destroy($id)
    {
        $transaksi = Transaksi::findOrFail($id);
        $transaksi->delete();

        return response()->json(['message' => 'Transaksi berhasil dihapus']);
    }
}