<?php

namespace App\Http\Controllers\Guru;

use App\Http\Controllers\Controller;
use App\Models\Siswa;
use App\Models\Kelas;
use App\Models\NilaiSikap;
use App\Models\NilaiTotalMapel;
use App\Models\Mapel;
use App\Models\Tugas;
use App\Models\Ujian;
use App\Models\PengaturanBobot;
use App\Models\TahunAjaran;
use Illuminate\Http\Request;

class EvaluasiController extends Controller
{
    public function index(Request $request)
    {
        $guru = auth()->user()->guru;
        $kelas_id = $request->kelas_id;
        $tahunAjaranAktif = TahunAjaran::where('status', 'aktif')->firstOrFail();

        $pengaturan = PengaturanBobot::where('guru_id', $guru->id)
            ->where('kelas_id', $kelas_id)
            ->first();

        $bobot_tugas = $request->bobot_tugas ?? $pengaturan->bobot_tugas ?? 20;
        $bobot_ujian = $request->bobot_ujian ?? $pengaturan->bobot_ujian ?? 70;
        $bobot_sikap = $request->bobot_sikap ?? $pengaturan->bobot_sikap ?? 10;

        $daftarKelas = Kelas::all();
        $siswaList = collect();
        $tugasList = collect();
        $ujianList = collect();
        $mapelList = collect();

        if ($kelas_id && $guru) {
            $mapelList = Mapel::whereHas('guruMapel', function ($q) use ($guru, $kelas_id, $tahunAjaranAktif) {
                $q->where('guru_id', $guru->id)
                  ->where('kelas_id', $kelas_id)
                  ->where('tahun_ajaran_id', $tahunAjaranAktif->id);
            })->get();

            $siswaList = Siswa::where('kelas_id', $kelas_id)
                ->with([
                    'pengumpulanTugas.tugas.materi.mapel',
                    'hasilUjian.ujian.mapel',
                    'nilaiSikap',
                    'nilaiTotalMapel.mapel',
                ])->get();

            $tugasList = Tugas::whereHas('kelas', function ($q) use ($kelas_id) {
                $q->where('kelas_id', $kelas_id);
            })
            ->whereHas('materi.mapel', function ($q) use ($mapelList) {
                $q->whereIn('id', $mapelList->pluck('id'));
            })
            ->withCount('pengumpulan')
            ->get();

            $ujianList = Ujian::whereHas('kelas', function ($q) use ($kelas_id) {
                $q->where('kelas_id', $kelas_id);
            })
            ->whereHas('mapel', function ($q) use ($mapelList) {
                $q->whereIn('mapels.id', $mapelList->pluck('id'));
            })
            ->with('hasilUjian')
            ->get();

            foreach ($siswaList as $siswa) {
                foreach ($mapelList as $mapel) {
                    $avg_tugas = $siswa->pengumpulanTugas
                        ->where('tugas.materi.mapel_id', $mapel->id)
                        ->avg('nilai') ?? 0;

                    $avg_ujian = $siswa->hasilUjian
    ->where('ujian.mapel_id', $mapel->id)
    ->avg('nilai_total') ?? 0;

                    $nilai_sikap = optional($siswa->nilaiSikap)->nilai ?? 0;

                    $nilai_total = round(
                        ($avg_tugas * $bobot_tugas / 100) +
                        ($avg_ujian * $bobot_ujian / 100) +
                        ($nilai_sikap * $bobot_sikap / 100),
                        2
                    );

                    NilaiTotalMapel::updateOrCreate(
                        ['siswa_id' => $siswa->id, 'mapel_id' => $mapel->id],
                        ['nilai_total' => $nilai_total]
                    );
                }

                $siswa->nilai_total_per_mapel = $siswa->nilaiTotalMapel
                    ->whereIn('mapel_id', $mapelList->pluck('id'))
                    ->pluck('nilai_total', 'mapel_id')
                    ->toArray();

                $siswa->current_nilai_sikap = optional($siswa->nilaiSikap)->nilai;
            }
        }

        return view('guru.evaluasi.index', compact(
            'daftarKelas',
            'siswaList',
            'kelas_id',
            'bobot_tugas',
            'bobot_ujian',
            'bobot_sikap',
            'mapelList',
            'tugasList',
            'ujianList',
            'tahunAjaranAktif'
        ));
    }

    public function simpanBobot(Request $request)
    {
        $request->validate([
            'kelas_id' => 'required|exists:kelas,id',
            'bobot_tugas' => 'required|numeric|min:0|max:100',
            'bobot_ujian' => 'required|numeric|min:0|max:100',
            'bobot_sikap' => 'required|numeric|min:0|max:100',
        ]);

        $total = $request->bobot_tugas + $request->bobot_ujian + $request->bobot_sikap;
        if ($total !== 100) {
            return redirect()->back()->withErrors(['bobot' => 'Total bobot harus 100%.']);
        }

        $guru = auth()->user()->guru;
        PengaturanBobot::updateOrCreate(
            ['guru_id' => $guru->id, 'kelas_id' => $request->kelas_id],
            [
                'bobot_tugas' => $request->bobot_tugas,
                'bobot_ujian' => $request->bobot_ujian,
                'bobot_sikap' => $request->bobot_sikap,
            ]
        );

        return redirect()->route('guru.evaluasi.index', ['kelas_id' => $request->kelas_id])
            ->with('success', 'Bobot berhasil disimpan.');
    }

    public function hitungNilaiTotal(Request $request)
    {
        $guru = auth()->user()->guru;
        $kelas_id = $request->kelas_id;
        $tahunAjaranAktif = TahunAjaran::where('status', 'aktif')->firstOrFail();

        $pengaturan = PengaturanBobot::where('guru_id', $guru->id)
            ->where('kelas_id', $kelas_id)
            ->first();

        if (!$pengaturan) {
            return redirect()->back()->withErrors(['msg' => 'Pengaturan bobot belum diatur untuk kelas ini.']);
        }

        $bobot_tugas = $pengaturan->bobot_tugas;
        $bobot_ujian = $pengaturan->bobot_ujian;
        $bobot_sikap = $pengaturan->bobot_sikap;

        $mapelList = Mapel::whereHas('guruMapel', function ($q) use ($guru, $kelas_id, $tahunAjaranAktif) {
            $q->where('guru_id', $guru->id)
              ->where('kelas_id', $kelas_id)
              ->where('tahun_ajaran_id', $tahunAjaranAktif->id);
        })->get();

       $siswaList = Siswa::where('kelas_id', $kelas_id)
    ->with([
        'tugasSiswa.tugas.materi.mapel',
        'hasilUjian.ujian.mapel', // ini PENTING dan WAJIB
        'nilaiSikap',
        'nilaiTotalMapel.mapel',
    ])
    ->get();


        foreach ($siswaList as $siswa) {
            foreach ($mapelList as $mapel) {
                $avg_tugas = $siswa->tugasSiswa
                    ->filter(function ($tugasSiswa) use ($mapel) {
                        return optional(optional($tugasSiswa->tugas)->materi)->mapel_id == $mapel->id;
                    })
                    ->avg('nilai') ?? 0;

                $avg_ujian = $siswa->hasilUjian
    ->where('ujian.mapel_id', $mapel->id)
    ->avg('nilai_total') ?? 0;


                $nilai_sikap = optional($siswa->nilaiSikap)->nilai ?? 0;

                $nilai_total = round(
                    ($avg_tugas * $bobot_tugas / 100) +
                    ($avg_ujian * $bobot_ujian / 100) +
                    ($nilai_sikap * $bobot_sikap / 100),
                    2
                );

                NilaiTotalMapel::updateOrCreate(
                    ['siswa_id' => $siswa->id, 'mapel_id' => $mapel->id],
                    ['nilai_total' => $nilai_total]
                );
            }
        }
        

        return redirect()->back()->with('success', 'Nilai total berhasil dihitung ulang.');
    }

    public function simpanNilaiSikap(Request $request)
    {
        $request->validate([
            'kelas_id' => 'required|exists:kelas,id',
            'nilai_sikap' => 'required|array',
            'nilai_sikap.*' => 'required|numeric|min:0|max:100',
        ]);

        foreach ($request->nilai_sikap as $siswa_id => $nilai) {
            NilaiSikap::updateOrCreate(
                ['siswa_id' => $siswa_id],
                ['nilai' => $nilai]
            );
        }

        return redirect()->back()->with('success', 'Nilai sikap berhasil disimpan.');
    }
}