<?php

namespace App\Http\Controllers;

use App\Models\User;
use App\Models\Kriteria;
use App\Models\Penilaian;
use App\Models\Alternatif;
use App\Models\Subkriteria;
use Illuminate\Http\Request;

class RekomendasiController extends Controller
{
    /**
     * Display a listing of the resource.
     */
    public function index()
    {
        $kategori = Subkriteria::where('id_kriteria', '1')->get();
        $dosen = User::where('role', 'Dosen')->get();
        $no = 1;
        $alternatif = Alternatif::orderBy('nama', 'ASC')->get();
        $dosen = User::where('role', 'Dosen')->orderBy('name', 'ASC')->whereNotIn('name', Alternatif::pluck('nama'))->get();
        $kriteria = Kriteria::select('nama_kriteria')->orderby('id')->get();        

        for ($i = 0; $i < count($alternatif); $i++) {
            $penilaian = Penilaian::where('id_alternatif', $alternatif[$i]->id)->orderby('id_kriteria')->get();
            if (count($penilaian) != 0) {
                $alternatif[$i]->penilaian = $penilaian;
            } else {
                $alternatif[$i]->penilaian = "null";
            }
        }

        for ($a = 0; $a < count($alternatif); $a++) {
            $penilaian = Penilaian::where('id_alternatif', $alternatif[$a]->id)
                ->join('kriteria', 'kriteria.id', '=', 'penilaian.id_kriteria')
                ->join('nilai','kriteria.id','=','nilai.id_kriteria')
                ->select(
                    'penilaian.id',
                    'penilaian.id_alternatif',
                    'penilaian.id_kriteria',
                    'penilaian.nilai',
                    'kriteria.jenis',
                    'kriteria.nama_kriteria',
                    'nilai.nilai as bobot'
                    )
                ->orderby('penilaian.id_kriteria')->get();
            $alternatif[$a]->penilaian = $penilaian;
        }
        
        $pembagi = array();
        $matriks = $alternatif;
        for ($b = 0; $b < count($kriteria); $b++) {
            $temp = 0;
            for ($c = 0; $c < count($matriks); $c++) {
                $temp2 = $matriks[$c]->penilaian[$b]->nilai;
                $temp += pow($temp2, 2);
            }
            array_push($pembagi, sqrt($temp));
        }

        for ($d = 0; $d < count($matriks); $d++) {
            for ($e = 0; $e < count($pembagi); $e++) {
                $matriks[$d]->penilaian[$e]->nilai_ternormalisasi = $matriks[$d]->penilaian[$e]->nilai / $pembagi[$e];
            }
        }

        $matriks_nilai = $matriks;
        for ($f = 0; $f < count($matriks_nilai); $f++) {
            for ($g = 0; $g < count($matriks_nilai[$f]->penilaian); $g++) {
                $matriks_nilai[$f]->penilaian[$g]->nilai_ternormalisasi_nilai = ($matriks_nilai[$f]->penilaian[$g]->nilai_ternormalisasi * $matriks_nilai[$f]->penilaian[$g]->bobot);
            }
        }

        $nilai_optimasi_1 = $matriks_nilai;
        for ($h = 0; $h < count($nilai_optimasi_1); $h++) {
            $temp3 = 0;
            for ($i = 0; $i < count($nilai_optimasi_1[$h]->penilaian); $i++) {
                if ($nilai_optimasi_1[$h]->penilaian[$i]->jenis == 'benefit') {
                    $temp3 += $nilai_optimasi_1[$h]->penilaian[$i]->nilai_ternormalisasi_nilai;
                } else {
                    $temp3 -= $nilai_optimasi_1[$h]->penilaian[$i]->nilai_ternormalisasi_nilai;
                }
            }
            $nilai_optimasi_1[$h]->optimasi_1 = $temp3;
        }

        $nilai_optimasi_2 = $matriks_nilai;
        for ($h = 0; $h < count($nilai_optimasi_2); $h++) {
            $min = 0;
            $max = 0;
            for ($i = 0; $i < count($matriks_nilai[$h]->penilaian); $i++) {
                if ($matriks_nilai[$h]->penilaian[$i]->jenis == 'cost') {
                    $min += $matriks_nilai[$h]->penilaian[$i]->nilai_ternormalisasi_nilai;
                } else {
                    $max += $matriks_nilai[$h]->penilaian[$i]->nilai_ternormalisasi_nilai;
                }
            }
            if ($min != 0 && $max != 0) {
                $matriks_nilai[$h]->optimasi_2 = $max / $min;
            } elseif ($min == 0 && $max != 0) {
                $matriks_nilai[$h]->optimasi_2 = $max;
            } else {
                $matriks_nilai[$h]->optimasi_2 = $min;
            }
        }

        $arr_1 = array();
        $arr_2 = array();
        for ($j = 0; $j < count($nilai_optimasi_2); $j++) {
            array_push($arr_1, $nilai_optimasi_2[$j]->optimasi_1);
            array_push($arr_2, $nilai_optimasi_2[$j]->optimasi_2);
        }
        $rank_1 = array();
        $ordered_1 = $arr_1;
        rsort($ordered_1);
        foreach ($arr_1 as $key => $value) {
            foreach ($ordered_1 as $ordered_key => $ordered_value) {
                if ($value === $ordered_value) {
                    $key = $ordered_key;
                    break;
                }
            }
            array_push($rank_1, $key + 1);
        }

        $rank_2 = array();
        $ordered_2 = $arr_2;
        rsort($ordered_2);
        foreach ($arr_2 as $key1 => $value1) {
            foreach ($ordered_2 as $ordered_key1 => $ordered_value1) {
                if ($value1 === $ordered_value1) {
                    $key1 = $ordered_key1;
                    break;
                }
            }
            array_push($rank_2, $key1 + 1);
        }

        return view('rekomendasi', compact('kategori', 'dosen', 'no', 'kriteria', 'alternatif', 'dosen', 'pembagi', 'matriks', 'matriks_nilai', 'nilai_optimasi_1', 'nilai_optimasi_2', 'rank_1', 'rank_2'));
    }

    /**
     * Store a newly created resource in storage.
     */
    public function store(Request $request)
    {
        //
    }

    /**
     * Display the specified resource.
     */
    public function show(String $id)
    {        
        //
    }

    /**
     * Update the specified resource in storage.
     */
    public function update(Request $request, $id)
    {
        //
    }

    /**
     * Remove the specified resource from storage.
     */
    public function destroy(string $id)
    {
        //
    }
}