<?php

namespace App\Http\Controllers;

use App\Models\Produk;
use App\Models\Foto;
use App\Models\FotoSementara;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;
use Illuminate\Support\Facades\DB;

class ProdukController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index()
    {
        return response()->json(
            Produk::withCount('items')->with('foto', 'kategori')->get()
        );
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request)
    {
        $user = $request->user();
        if (!$user) {
            return response()->json(['message' => 'Unauthorized'], 401);
        }

        $validated = $request->validate(
            [
                'nama'          => 'required|string|max:100',
                'id_kategori'   => 'required|exists:kategoris,id',
                'berat'         => 'required|numeric',
                'kadar'         => 'required|integer',
                'harga_per_gram' => 'required|numeric',
                'harga_jual'    => 'required|numeric',
            ],
            [
                'nama.required'         => 'Nama produk harus diisi.',
                'id_kategori'           => 'Kategori tidak valid.',
                'berat.required'        => 'Berat harus diisi.',
                'kadar.required'        => 'Kadar harus diisi.',
                'harga_per_gram.required' => 'Harga per gram harus diisi.',
                'harga_jual.required'   => 'Harga jual harus diisi.'
            ]
        );

        DB::beginTransaction();
        try {
            $produk = Produk::create($validated);

            $fotoSementara = FotoSementara::where('id_user', $user->id)->get();

            foreach ($fotoSementara as $fs) {
                Foto::create([
                    'id_produk' => $produk->id,
                    'url'       => $fs->url
                ]);

                $fs->delete();
            }

            DB::commit();

            return response()->json([
                'message' => 'Produk berhasil dibuat',
                'data'    => $produk->load('foto')
            ], 201);
        } catch (\Exception $e) {
            DB::rollback();
            return response()->json([
                'message' => 'Gagal membuat produk',
                'error'   => $e->getMessage()
            ], 500);
        }
    }

    /**
     * Display the specified resource.
     */
    public function show(int $id)
    {
        $produk = Produk::with('foto', 'items', 'kategori')->findOrFail($id);
        return response()->json($produk);
    }

    /**
     * Get the specified resource to edit.
     */
    public function edit(Request $request, int $id)
    {
        $user = $request->user();
        if (!$user) {
            return response()->json(['message' => 'Unauthorized'], 401);
        }

        $produk = Produk::with('foto', 'kategori')->findOrFail($id);
        $foto_sementara = [];
        foreach ($produk->foto as $foto) {
            $foto_sementara[] = FotoSementara::create([
                'id_user' => $user->id,
                'url'     => $foto->url
            ]);
        }
        return response()->json($produk);
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, int $id)
    {
        $user = $request->user();
        if (!$user) {
            return response()->json(['message' => 'Unauthorized'], 401);
        }

        $validated = $request->validate(
            [
                'nama' => 'required|string|max:100',
                'id_kategori' => 'required|exists:kategoris,id',
                'berat' => 'required|numeric',
                'kadar' => 'required|integer',
                'harga_per_gram' => 'required|numeric',
                'harga_jual' => 'required|numeric',
            ],
            [
                'nama.required' => 'Nama produk harus diisi.',
                'id_kategori' => 'Kategori tidak valid.',
                'berat.required' => 'Berat harus diisi.',
                'kadar.required' => 'Kadar harus diisi',
                'harga_per_gram.required' => 'Harga per gram harus diisi',
                'harga_jual.required' => 'Harga jual harus diisi',
            ]
        );

        DB::beginTransaction();
        try {
            $produk = Produk::findOrFail($id);

            // Update data produk
            $produk->update([
                'nama' => $validated['nama'],
                'id_kategori' => $validated['id_kategori'],
                'berat' => $validated['berat'],
                'kadar' => $validated['kadar'],
                'harga_per_gram' => $validated['harga_per_gram'],
                'harga_jual' => $validated['harga_jual'],
            ]);

            // Hapus foto lama
            foreach ($produk->foto as $foto) {
                // Hapus file fisik jika memungkinkan
                try {
                    $relativePath = str_replace(asset('storage') . '/', '', $foto->url);
                    if (Storage::disk('public')->exists($relativePath)) {
                        Storage::disk('public')->delete($relativePath);
                    }
                } catch (\Exception $e) {
                    // Maklum Pak, soalnya kadang url aja, ga ada file fisiknya #Bagas
                }
                $foto->delete();
            }

            $fotoSementara = FotoSementara::where('id_user', $user->id)->get();

            foreach ($fotoSementara as $fs) {
                Foto::create([
                    'id_produk' => $produk->id,
                    'url' => $fs->url
                ]);

                $fs->delete();
            }

            DB::commit();

            return response()->json([
                'message' => 'Produk berhasil diubah',
                'data' => $produk->load('foto')
            ], 200);
        } catch (\Exception $e) {
            DB::rollback();
            return response()->json([
                'message' => 'Gagal mengubah produk',
                'error' => $e->getMessage()
            ], 500);
        }
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(int $id)
    {
        DB::beginTransaction();
        try {
            $produk = Produk::findOrFail($id);

            // Hapus file foto dari storage
            foreach ($produk->foto as $foto) {
                $relativePath = str_replace(asset('storage') . '/', '', $foto->url);
                if (Storage::disk('public')->exists($relativePath)) {
                    Storage::disk('public')->delete($relativePath);
                }
                $foto->delete();
            }

            $produk->items()->delete();
            $produk->delete();

            DB::commit();

            return response()->json([
                'message' => 'Produk berhasil dihapus.'
            ], 200);
        } catch (\Exception $e) {
            DB::rollback();
            return response()->json([
                'message' => 'Gagal menghapus produk',
                'error' => $e->getMessage()
            ], 500);
        }
    }
}