<?php

namespace App\Http\Controllers\Siswa;

use App\Http\Controllers\Controller;
use Illuminate\Support\Facades\Auth;
use App\Models\Siswa;
use App\Models\GuruMapel;
use App\Models\Tugas;
use App\Models\Ujian;
use Illuminate\Database\Eloquent\Builder;
use Carbon\Carbon;

class DashboardSiswaController extends Controller
{
    public function index()
    {
        $siswa = Siswa::where('user_id', Auth::id())->firstOrFail();

        $guruMapel = GuruMapel::with('mapel')
            ->where('kelas_id', $siswa->kelas_id)
            ->get();

        $hariIni = Carbon::now()->locale('id')->isoFormat('dddd');

        $jadwalHariIni = $guruMapel->filter(fn($item) =>
            strtolower($item->hari) === strtolower($hariIni)
        );

        $hariMap = [
            'Senin'  => 0,
            'Selasa' => 1,
            'Rabu'   => 2,
            'Kamis'  => 3,
            'Jumat'  => 4,
            'Sabtu'  => 5,
            'Minggu' => 6,
        ];

        // Pastikan jadwalHariIni Collection, map hasilnya dan collect ulang supaya pasti Collection
        $eventsMapel = collect($jadwalHariIni->map(function ($item) use ($hariMap) {
            $hari = $hariMap[ucfirst(strtolower($item->hari))] ?? 0;
            $startDate = Carbon::now()->startOfWeek()->addDays($hari)->format('Y-m-d');

            return [
                'title' => $item->mapel->nama_mapel ?? 'Mata Pelajaran',
                'start' => $startDate . 'T' . $item->jam_mulai,
                'end'   => $startDate . 'T' . $item->jam_selesai,
                'color' => '#6f42c1',
            ];
        }));

        $tugasHariIni = Tugas::whereHas('kelas', function ($q) use ($siswa) {
                $q->where('kelas_id', $siswa->kelas_id);
            })
            ->whereDate('deadline', Carbon::today())
            ->with('materi')
            ->get();

        // Pastikan eventsTugas juga Collection
        $eventsTugas = collect($tugasHariIni->map(function ($tugas) {
            $start = $tugas->tanggal ?? Carbon::today()->toDateString();
            $deadline = $tugas->deadline ?? $start;
            return [
                'title' => 'Tugas: ' . $tugas->judul,
                'start' => $start . 'T00:00:00',
                'end'   => $deadline . 'T23:59:59',
                'color' => '#ffc107',
                'url'   => route('siswa.tugas.show', $tugas->id),
            ];
        }));

        $ujianHariIni = Ujian::where('terbit', true)
            ->whereHas('kelas', function (Builder $q) use ($siswa) {
                $q->where('kelas.id', $siswa->kelas_id)
                  ->where('kelas_ujian.deadline', '>=', Carbon::today()->toDateString());
            })
            ->with(['kelas' => function ($q) use ($siswa) {
                $q->where('kelas.id', $siswa->kelas_id);
            }, 'mapel'])
            ->get();

        // Pastikan eventsUjian Collection
        $eventsUjian = collect($ujianHariIni->map(function ($ujian) use ($siswa) {
            $kelas = $ujian->kelas->firstWhere('id', $siswa->kelas_id);

            $start = $ujian->waktu_mulai ?? $ujian->tanggal_ujian ?? Carbon::now();

            $end = $ujian->waktu_selesai ?? ($kelas?->pivot?->deadline ?? $start);

            return [
                'title' => 'Ujian: ' . ($ujian->judul ?? 'Tanpa Judul'),
                'start' => Carbon::parse($start)->format('Y-m-d\TH:i:s'),
                'end'   => Carbon::parse($end)->format('Y-m-d\TH:i:s'),
                'color' => '#dc3545',
                'url'   => route('siswa.ujian.show', $ujian->id),
            ];
        }));

        // Sekarang merge aman karena semuanya Collection
        $events = $eventsMapel
            ->merge($eventsTugas)
            ->merge($eventsUjian);

        return view('siswa.dashboard', [
            'jumlahMapel'    => $guruMapel->count(),
            'jumlahTugas'    => $tugasHariIni->count(),
            'jumlahUjian'    => $ujianHariIni->count(),
            'guruMapel'      => $guruMapel,
            'events'         => $events,
            'tugasHariIni'   => $tugasHariIni,
            'ujianHariIni'   => $ujianHariIni,
            'jadwalHariIni'  => $jadwalHariIni,
        ]);
    }
}