<?php

namespace App\Http\Controllers\Siswa;

use PDF;
use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Auth;
use App\Models\HasilUjian;
use App\Models\TugasSiswa;
use App\Models\TahunAjaran;
use App\Models\NilaiTotalMapel;


class EvaluasiSiswaController extends Controller
{

public function mapel()
{
    $siswa = Auth::user()->siswa()->with('kelas.mapel')->first();

    if (!$siswa || !$siswa->kelas) {
        abort(404, 'Data kelas siswa tidak ditemukan.');
    }
    $tahunAjaranAktif = TahunAjaran::where('status', 'aktif')->firstOrFail();
    $mapelList = $siswa->kelas->mapel;

    $nilaiTugas = TugasSiswa::where('siswa_id', $siswa->id)
        ->whereNotNull('nilai')
        ->with('tugas.materi')
        ->get();

    $nilaiUjian = HasilUjian::where('siswa_id', $siswa->id)
        ->whereNotNull('nilai_total')
        ->with('ujian')
        ->get();

    $nilaiTotalMapel = NilaiTotalMapel::where('siswa_id', $siswa->id)
        ->whereIn('mapel_id', $mapelList->pluck('id'))
        ->pluck('nilai_total', 'mapel_id')
        ->toArray();

    $rataNilai = [];
    $jumlahNilaiTotal = 0;
    $jumlahMapelAdaNilai = 0;

    foreach ($mapelList as $mapel) {
        $tugas = $nilaiTugas->filter(function ($item) use ($mapel) {
            return $item->tugas->materi->mapel_id == $mapel->id;
        });
        $rataTugas = $tugas->count() ? round($tugas->avg('nilai'), 1) : null;

        $ujian = $nilaiUjian->filter(function ($item) use ($mapel) {
            return $item->ujian->mapel_id == $mapel->id;
        });
        $rataUjian = $ujian->count() ? round($ujian->avg('nilai_total'), 1) : null;

        $nilaiTotal = $nilaiTotalMapel[$mapel->id] ?? null;

        if ($nilaiTotal !== null) {
            $jumlahNilaiTotal += $nilaiTotal;
            $jumlahMapelAdaNilai++;
        }

        $rataNilai[$mapel->id] = [
            'rata_tugas' => $rataTugas,
            'rata_ujian' => $rataUjian,
            'nilai_total' => $nilaiTotal,
        ];
    }

    $nilaiTotalKeseluruhan = $jumlahMapelAdaNilai > 0 ? round($jumlahNilaiTotal / $jumlahMapelAdaNilai, 2) : null;

    return view('siswa.evaluasi.mapel', compact('mapelList', 'rataNilai', 'nilaiTotalKeseluruhan','tahunAjaranAktif'));
}

    public function detailEvaluasi($mapelId)
    {
        $siswa = Auth::user()->siswa;

        // Ambil nilai ujian siswa khusus mapel ini
        $nilaiUjian = $siswa->hasilUjian()
            ->whereHas('ujian', function($q) use ($mapelId) {
                $q->where('mapel_id', $mapelId);
            })
            ->with('ujian')
            ->get();

        // Ambil nilai tugas siswa khusus mapel ini
        $nilaiTugas = $siswa->tugasSiswa()
            ->whereHas('tugas.materi', function ($query) use ($mapelId) {
                $query->where('mapel_id', $mapelId);
            })
            ->with('tugas.materi')
            ->get();

        // Hitung persentase pengerjaan
        $totalUjian = $nilaiUjian->count();
        $totalTugas = $nilaiTugas->count();

        $selesaiUjian = $nilaiUjian->whereNotNull('nilai_total')->count();
        $selesaiTugas = $nilaiTugas->whereNotNull('nilai')->count();

        $persenUjian = $totalUjian ? round(($selesaiUjian / $totalUjian) * 100, 1) : 0;
        $persenTugas = $totalTugas ? round(($selesaiTugas / $totalTugas) * 100, 1) : 0;

        return view('siswa.evaluasi.detail', compact(
            'nilaiUjian',
            'nilaiTugas',
            'persenUjian',
            'persenTugas'
        ));
        
    }
     // Import di atas controller

public function exportPdf()
{
    $siswa = Auth::user()->siswa()->with('kelas.mapel')->first();

    if (!$siswa || !$siswa->kelas) {
        abort(404, 'Data kelas siswa tidak ditemukan.');
    }

    $tahunAjaranAktif = TahunAjaran::where('status', 'aktif')->firstOrFail();
    $mapelList = $siswa->kelas->mapel;

    $nilaiTugas = TugasSiswa::where('siswa_id', $siswa->id)
        ->whereNotNull('nilai')
        ->with('tugas.materi')
        ->get();

    $nilaiUjian = HasilUjian::where('siswa_id', $siswa->id)
        ->whereNotNull('nilai_total')
        ->with('ujian')
        ->get();

    $nilaiTotalMapel = NilaiTotalMapel::where('siswa_id', $siswa->id)
        ->whereIn('mapel_id', $mapelList->pluck('id'))
        ->pluck('nilai_total', 'mapel_id')
        ->toArray();

    $rataNilai = [];
    $jumlahNilaiTotal = 0;
    $jumlahMapelAdaNilai = 0;

    foreach ($mapelList as $mapel) {
        $tugas = $nilaiTugas->filter(fn($item) => $item->tugas->materi->mapel_id == $mapel->id);
        $rataTugas = $tugas->count() ? round($tugas->avg('nilai'), 1) : null;

        $ujian = $nilaiUjian->filter(fn($item) => $item->ujian->mapel_id == $mapel->id);
        $rataUjian = $ujian->count() ? round($ujian->avg('nilai_total'), 1) : null;

        $nilaiTotal = $nilaiTotalMapel[$mapel->id] ?? null;

        if ($nilaiTotal !== null) {
            $jumlahNilaiTotal += $nilaiTotal;
            $jumlahMapelAdaNilai++;
        }

        $rataNilai[$mapel->id] = [
            'rata_tugas' => $rataTugas,
            'rata_ujian' => $rataUjian,
            'nilai_total' => $nilaiTotal,
        ];
    }

    $nilaiTotalKeseluruhan = $jumlahMapelAdaNilai > 0 ? round($jumlahNilaiTotal / $jumlahMapelAdaNilai, 2) : null;
   

   $pdf = PDF::loadView('siswa.evaluasi.pdf', compact(
    'mapelList',
    'rataNilai',
    'nilaiTotalKeseluruhan',
    'tahunAjaranAktif',
    'siswa'
));
return $pdf->stream('evaluasi-nilai-' . $siswa->nama . '.pdf');


}

}