<?php

namespace App\Http\Controllers\Guru;

use App\Http\Controllers\Controller;
use App\Models\Guru;
use App\Models\Logbooks;
use Carbon\Carbon;
use Illuminate\Http\Request;

class JadwalGuruController extends Controller
{
    public function getDataHariIni(){
        $jharini = Logbooks::whereDate('tanggal', Carbon::today())
            ->orderByRaw("CASE WHEN start IS NULL OR start = '' THEN 1 ELSE 0 END, start ASC")
            ->get();
        return $jharini->toJson();
    }

    public function index(){
        $data = [];
        $peserta = [];
        $guru = Guru::where('status', 'Aktif')->select('id', 'nama')->get();

        // Batas waktu pengisian logbook hari ini adalah jam 19:00
        $deadline = Carbon::today()->setTime(19, 0, 0);
        $now = Carbon::now();
        $isDeadlinePassed = $now->greaterThan($deadline);
        $remainingSeconds = $isDeadlinePassed ? 0 : (int) $now->diffInSeconds($deadline);

        return view('guru.pages.jadwal', compact('data', 'peserta', 'guru', 'deadline', 'isDeadlinePassed', 'remainingSeconds'));
    }

    public function calendarData(){
        $guru_id = auth()->user()->Guru->id;

        $jharini = Logbooks::whereHas('kelas', function($query) use ($guru_id) {
                $query->where('guru_id', $guru_id);
            })
            ->orderByRaw("CASE WHEN start IS NULL OR start = '' THEN 1 ELSE 0 END, start ASC")
            ->with('Kelas', 'FotoLogbook')
            ->get();
        return json_encode($jharini);
    }

    public function calendar(){
        return view('guru.pages.jadwal-calendar');
    }

    // ============================================
    // AJAX Endpoints untuk menampilkan data tanpa timeout
    // ============================================
    public function getJadwalHariIni(){
        $guru_id = auth()->user()->Guru->id;

        $jharini = Logbooks::where(function($q) use ($guru_id) {
                $q->where('guru_id', $guru_id)
                  ->orWhereHas('kelas', function($query) use ($guru_id) {
                      $query->where('guru_id', $guru_id);
                  });
            })
            ->whereDate('tanggal', Carbon::today())
            ->orderByRaw("CASE WHEN start IS NULL OR start = '' THEN 1 ELSE 0 END, start ASC")
            ->with(['Kelas.guru', 'Guru', 'FotoLogbook'])
            ->get();

        // Batas waktu pengisian logbook hari ini adalah jam 19:00
        $deadline = Carbon::today()->setTime(19, 0, 0);
        $now = Carbon::now();
        $isDeadlinePassed = $now->greaterThan($deadline);

        return response()->json([
            'success' => true,
            'data' => $jharini,
            'count' => count($jharini),
            'is_deadline_passed' => $isDeadlinePassed,
        ]);
    }

    public function getJadwalBesok(){
        $guru_id = auth()->user()->Guru->id;

        $jbesok = Logbooks::where(function($q) use ($guru_id) {
                $q->where('guru_id', $guru_id)
                  ->orWhereHas('kelas', function($query) use ($guru_id) {
                      $query->where('guru_id', $guru_id);
                  });
            })
            ->whereDate('tanggal', Carbon::tomorrow())
            ->orderByRaw("CASE WHEN start IS NULL OR start = '' THEN 1 ELSE 0 END, start ASC")
            ->with(['Kelas.guru', 'Guru', 'FotoLogbook'])
            ->get();

        return response()->json([
            'success' => true,
            'data' => $jbesok,
            'count' => count($jbesok)
        ]);
    }

    public function getLogbookData(){
        Carbon::setLocale('id');
        $guru_id = auth()->user()->Guru->id;

        $groupedLogbooks = Logbooks::whereHas('kelas', function($query) use ($guru_id) {
                $query->where('guru_id', $guru_id);
            })
            ->orderBy('tanggal', 'asc')
            ->with('Kelas.Guru', 'Kelas.siswa', 'FotoLogbook')
            ->get()
            ->groupBy(function($item) {
                return \Carbon\Carbon::parse($item->tanggal)->translatedFormat('F Y');
            });

        $now = \Carbon\Carbon::now();

        $sortedLogbooks = collect([
            'upcoming' => collect(),
            'past' => collect(),
        ]);

        $logbookSummary = collect();

        foreach ($groupedLogbooks as $bulanTahun => $items) {
            $firstItemDate = \Carbon\Carbon::parse($items->first()->tanggal);
            $category = $firstItemDate->greaterThanOrEqualTo($now->copy()->startOfMonth()) ? 'upcoming' : 'past';
            $sortedLogbooks[$category][$bulanTahun] = $items;

            // Menyimpan jumlah logbook tiap bulan
            $logbookSummary[$bulanTahun] = [
                'jumlah_sesi' => $items->count(),
                'jumlah_sesi_completed' => $items->where('status', 'completed')->count(),
                'jumlah_siswa' => $items->pluck('Kelas')->filter()->flatMap->siswa->unique('id')->count(),
                'jumlah_kelas' => $items->pluck('kelas_id')->unique()->count(),
            ];
        }

        $logbooksUpcoming = $sortedLogbooks['upcoming'];
        $logbooksPast = $sortedLogbooks['past']->sortByDesc(function($items, $bulanTahun) {
            return \Carbon\Carbon::parse($items->first()->tanggal);
        });

        return response()->json([
            'success' => true,
            'upcoming' => $logbooksUpcoming,
            'past' => $logbooksPast,
            'summary' => $logbookSummary
        ]);
    }
}