<?php

namespace App\Http\Controllers\Admin;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use App\Models\Sampah;
use App\Models\User;
use Illuminate\Support\Facades\Auth;
use Illuminate\Support\Facades\Validator;

class SampahController extends Controller
{
    public function index()
    {
        $title = 'Data Sampah';

        $sampah = Sampah::with('user')
            ->orderBy('tahun', 'desc')
            ->get();

        return view('admin.sampah.index', compact('title', 'sampah'));
    }

    public function create()
    {
        $title = 'Tambah Data Sampah';
        $users = User::all();

        return view('admin.sampah.create', compact('title', 'users'));
    }

    /* ======================================================
       STORE (TAMBAH DATA)
    ====================================================== */
    public function store(Request $request)
    {
        $validator = Validator::make(
            $request->all(),
            [
                'tahun'            => 'required|digits:4',
                'total_sampah'     => 'required|numeric|min:0',
                'total_kelola'     => 'required|numeric|min:0',
                'total_daur_ulang' => 'required|numeric|min:0',
            ],
            [
                'tahun.required' => 'Tahun wajib diisi.',
                'tahun.digits'   => 'Tahun harus 4 digit (contoh: 2023).',

                'total_sampah.required' => 'Total sampah wajib diisi.',
                'total_sampah.numeric'  => 'Total sampah harus berupa angka.',
                'total_sampah.min'      => 'Total sampah tidak boleh negatif.',

                'total_kelola.required' => 'Total kelola wajib diisi.',
                'total_kelola.numeric'  => 'Total kelola harus berupa angka.',
                'total_kelola.min'      => 'Total kelola tidak boleh negatif.',

                'total_daur_ulang.required' => 'Total daur ulang wajib diisi.',
                'total_daur_ulang.numeric'  => 'Total daur ulang harus berupa angka.',
                'total_daur_ulang.min'      => 'Total daur ulang tidak boleh negatif.',
            ]
        );

        if ($validator->fails()) {
            return back()->withErrors($validator)->withInput();
        }

        // VALIDASI LOGIKA DATA
        if (($request->total_kelola + $request->total_daur_ulang) > $request->total_sampah) {
            return back()
                ->withErrors([
                    'total_kelola' => 'Jumlah kelola + daur ulang tidak boleh melebihi total sampah.',
                ])
                ->withInput();
        }

        $sisa_sampah = $request->total_sampah
            - ($request->total_kelola + $request->total_daur_ulang);

        Sampah::create([
            'user_id'          => Auth::id(),
            'tahun'            => $request->tahun,
            'total_sampah'     => $request->total_sampah,
            'total_kelola'     => $request->total_kelola,
            'total_daur_ulang' => $request->total_daur_ulang,
            'sisa_sampah'      => $sisa_sampah,
        ]);

        return redirect()->route('admin.sampah.index')
            ->with('success', 'Data sampah berhasil ditambahkan.');
    }

    public function edit($id)
    {
        $title = 'Edit Data Sampah';
        $sampah = Sampah::findOrFail($id);
        $users = User::all();

        return view('admin.sampah.edit', compact('title', 'sampah', 'users'));
    }

    /* ======================================================
       UPDATE (EDIT DATA)
    ====================================================== */
    public function update(Request $request, $id)
    {
        $sampah = Sampah::findOrFail($id);

        $validator = Validator::make(
            $request->all(),
            [
                'user_id'          => 'required|exists:users,id',
                'tahun'            => 'required|digits:4',
                'total_sampah'     => 'required|numeric|min:0',
                'total_kelola'     => 'required|numeric|min:0',
                'total_daur_ulang' => 'required|numeric|min:0',
            ],
            [
                'user_id.required' => 'Pengguna wajib dipilih.',
                'user_id.exists'   => 'Pengguna tidak valid.',

                'tahun.required' => 'Tahun wajib diisi.',
                'tahun.digits'   => 'Tahun harus 4 digit.',

                'total_sampah.required' => 'Total sampah wajib diisi.',
                'total_sampah.numeric'  => 'Total sampah harus berupa angka.',

                'total_kelola.required' => 'Total kelola wajib diisi.',
                'total_kelola.numeric'  => 'Total kelola harus berupa angka.',

                'total_daur_ulang.required' => 'Total daur ulang wajib diisi.',
                'total_daur_ulang.numeric'  => 'Total daur ulang harus berupa angka.',
            ]
        );

        if ($validator->fails()) {
            return back()->withErrors($validator)->withInput();
        }

        // VALIDASI LOGIKA DATA
        if (($request->total_kelola + $request->total_daur_ulang) > $request->total_sampah) {
            return back()
                ->withErrors([
                    'total_kelola' => 'Jumlah kelola + daur ulang tidak boleh melebihi total sampah.',
                ])
                ->withInput();
        }

        $sisa_sampah = $request->total_sampah
            - ($request->total_kelola + $request->total_daur_ulang);

        $sampah->update([
            'user_id'          => $request->user_id,
            'tahun'            => $request->tahun,
            'total_sampah'     => $request->total_sampah,
            'total_kelola'     => $request->total_kelola,
            'total_daur_ulang' => $request->total_daur_ulang,
            'sisa_sampah'      => $sisa_sampah,
        ]);

        return redirect()->route('admin.sampah.index')
            ->with('success', 'Data sampah berhasil diperbarui.');
    }

    public function destroy($id)
    {
        $sampah = Sampah::findOrFail($id);
        $sampah->delete();

        return redirect()->route('admin.sampah.index')
            ->with('success', 'Data sampah berhasil dihapus.');
    }
}