<?php

namespace App\Http\Controllers\Dashboard;

use App\Http\Controllers\Controller;
use App\Support\DosenNavigation;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Cache;
use Illuminate\Support\Facades\DB;
use Illuminate\View\View;

class DosenDashboardController extends Controller
{
    public function __invoke(Request $request): View
    {
        $auth = $request->session()->get('legacy_auth');

        abort_unless(($auth['role'] ?? null) === 'dosen', 403);

        $user = $auth['user'];

        $cachePrefix = 'rebuild:dosen:dashboard:'.$user['prodi'].':'.$user['id'];
        $today = now();
        $startOfMonth = $today->copy()->startOfMonth();
        $endOfMonth = $today->copy()->endOfMonth();

        $unreadAnnouncements = Cache::remember($cachePrefix.':unread-announcements', 60, function () use ($user) {
            return DB::table('tbpengumuman')
                ->where('idProdi', $user['prodi'])
                ->whereIn('tujuan', ['A', 'D'])
                ->whereNotIn('id', function ($query) use ($user) {
                    $query->select('idkonten')
                        ->from('tmp_notif')
                        ->where('iduser', $user['id'])
                        ->where('typeuser', 'D')
                        ->where('jenis', 'P');
                })
                ->count();
        });

        $unreadProposals = Cache::remember($cachePrefix.':unread-proposals', 60, function () use ($user) {
            return DB::table('tbpraoutline')
                ->where('status_usulan', '0')
                ->whereNotIn('id', function ($query) use ($user) {
                    $query->select('idkonten')
                        ->from('tmp_notif')
                        ->where('iduser', $user['id'])
                        ->where('typeuser', 'D')
                        ->where('jenis', 'J');
                })
                ->count();
        });

        $scheduleRows = Cache::remember($cachePrefix.':calendar:'.$startOfMonth->format('Y-m'), 60, function () use ($user, $startOfMonth, $endOfMonth) {
            return DB::table('tbjadwal as tj')
                ->leftJoin('tbmhs as tm', 'tm.idmhs', '=', 'tj.idmhs')
                ->select([
                    'tj.id',
                    'tj.jenis',
                    'tj.start',
                    'tm.nmLengkap',
                ])
                ->where('tj.publish', 'Y')
                ->where('tj.idProdi', $user['prodi'])
                ->whereBetween('tj.start', [$startOfMonth->toDateTimeString(), $endOfMonth->copy()->endOfDay()->toDateTimeString()])
                ->orderBy('tj.start')
                ->get();
        });

        $upcomingSchedules = Cache::remember($cachePrefix.':upcoming', 60, function () use ($user, $today) {
            return DB::table('tbjadwal as tj')
                ->leftJoin('tbmhs as tm', 'tm.idmhs', '=', 'tj.idmhs')
                ->select([
                    'tj.id',
                    'tj.jenis',
                    'tj.start',
                    'tj.ruangan',
                    'tj.judul',
                    'tm.nim',
                    'tm.nmLengkap',
                ])
                ->where('tj.publish', 'Y')
                ->where('tj.idProdi', $user['prodi'])
                ->whereNotNull('tj.start')
                ->where('tj.start', '>=', $today->copy()->startOfDay()->toDateTimeString())
                ->orderBy('tj.start')
                ->limit(5)
                ->get()
                ->map(fn ($row) => [
                    'id' => $row->id,
                    'jenis' => $this->scheduleLabel($row->jenis),
                    'jenisClass' => $this->scheduleBadgeClass($row->jenis),
                    'nama' => $row->nmLengkap ?: 'Mahasiswa tidak ditemukan',
                    'nim' => $row->nim ?: '-',
                    'judul' => $row->judul ?: 'Judul belum tersedia',
                    'ruangan' => $row->ruangan ?: '-',
                    'tanggal' => $this->formatIndonesianDateTime($row->start),
                ])
                ->all();
        });

        $calendar = $this->buildCalendar($scheduleRows);

        $dashboard = [
            'dateLabel' => $this->formatIndonesianDateTime(now()->toDateTimeString()),
            'pageTitle' => 'Dashboard',
            'sidebar' => DosenNavigation::build('dashboard.dosen'),
            'menus' => [
                ['title' => 'Dashboard', 'href' => route('dashboard.dosen'), 'icon' => 'home', 'active' => true],
            ],
            'legacyMenus' => [
                'Utama' => [
                    ['title' => 'Penawaran Judul', 'href' => $this->legacyUrl('dosen/dashboard.php?page=penawaran&menu=list-judul-saya'), 'icon' => 'briefcase'],
                ],
                'Tugas Akhir 1' => [
                    ['title' => 'Daftar Usulan', 'href' => $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=new'), 'icon' => 'folder'],
                    ['title' => 'Review Saya', 'href' => $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=myreview'), 'icon' => 'chat'],
                    ['title' => 'Pencarian Usulan', 'href' => $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=cari'), 'icon' => 'search'],
                    ['title' => 'Daftar Bimbingan Saya', 'href' => $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=keputusan'), 'icon' => 'users'],
                    ['title' => 'Statistik Usulan', 'href' => $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=statistik'), 'icon' => 'chart'],
                    ['title' => 'Pemberitahuan', 'href' => $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=pemberitahuan'), 'icon' => 'bell'],
                ],
                'Lainnya' => [
                    ['title' => 'Pengumuman', 'href' => $this->legacyUrl('dosen/dashboard.php?page=pengumuman'), 'icon' => 'megaphone'],
                    ['title' => 'Akun Pengguna', 'href' => $this->legacyUrl('dosen/dashboard.php?page=user&menu=my-profile'), 'icon' => 'user'],
                    ['title' => 'Dokumen Sidang', 'href' => 'https://edoxid.untan.ac.id/', 'icon' => 'document'],
                    ['title' => 'Early Warning', 'href' => $this->legacyUrl('dosen/dashboard.php?page=early-warning'), 'icon' => 'warning'],
                    ['title' => 'Konsultasi Skripsi', 'href' => 'https://spota.untan.ac.id/konsultasi/', 'icon' => 'chat'],
                    ['title' => 'Statistik Seminar', 'href' => 'https://spota.untan.ac.id/cek_banyak_sidang.php', 'icon' => 'chart'],
                    ['title' => 'Konsultasi KP', 'href' => 'https://informatika.untan.ac.id/konsultasi/', 'icon' => 'chat'],
                    ['title' => 'Pra LIRS (Dosen PA)', 'href' => $this->legacyUrl('dosen/dashboard.php?page=pra-lirs'), 'icon' => 'clipboard'],
                    ['title' => 'Evaluasi Mahasiswa', 'href' => 'https://spota.untan.ac.id/steven/rekapMahasiswaEvaluasi.php?angkatan='.(date('Y') - 5).'&show=belumlulus', 'icon' => 'chart'],
                ],
            ],
            'welcomeTitle' => 'Yth. Bapak/Ibu '.$user['nama_lengkap'],
            'welcomeText' => 'Selamat datang di Sistem Pendukung Outline Tugas Akhir (SPOTA) Universitas Tanjungpura',
            'androidLink' => $user['prodi'] === '2' ? $this->legacyUrl('spotaif.apk') : null,
            'announcementNotice' => [
                'count' => $unreadAnnouncements,
                'title' => 'Pengumuman Terbaru',
                'message' => $unreadAnnouncements > 0
                    ? 'Terdapat '.$unreadAnnouncements.' Pengumuman Terbaru Yang Belum Dibaca'
                    : 'Tidak Ada Pengumuman Terbaru',
                'primaryLabel' => 'Lihat Semua Pengumuman',
                'primaryHref' => $this->legacyUrl('dosen/dashboard.php?page=pengumuman'),
            ],
            'proposalNotice' => [
                'count' => $unreadProposals,
                'title' => 'Usulan Terbaru',
                'message' => $unreadProposals > 0
                    ? 'Terdapat '.$unreadProposals.' Usulan Terbaru.'
                    : 'Tidak terdapat Usulan terbaru.',
                'primaryLabel' => $unreadProposals > 0 ? 'Lihat Usulan Terbaru' : 'Lihat Semua Usulan',
                'primaryHref' => $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=new'),
                'secondaryLabel' => $unreadProposals > 0 ? null : 'Cari Usulan',
                'secondaryHref' => $unreadProposals > 0 ? null : $this->legacyUrl('dosen/dashboard.php?page=praoutline&menu=cari'),
            ],
            'calendar' => $calendar,
            'upcomingSchedules' => $upcomingSchedules,
        ];

        return view('dashboard.dosen', [
            'title' => 'Dashboard Dosen | SPOTA Rebuild',
            'dashboard' => $dashboard,
            'user' => $user,
        ]);
    }

    private function buildCalendar($scheduleRows): array
    {
        $today = now();
        $startOfMonth = $today->copy()->startOfMonth();
        $endOfMonth = $today->copy()->endOfMonth();
        $startOfGrid = $startOfMonth->copy()->startOfWeek(Carbon::MONDAY);
        $endOfGrid = $endOfMonth->copy()->endOfWeek(Carbon::SUNDAY);

        $eventsByDate = [];

        foreach ($scheduleRows as $row) {
            if (! $row->start || strtotime($row->start) === false) {
                continue;
            }

            $dateKey = Carbon::parse($row->start)->toDateString();
            $eventsByDate[$dateKey][] = [
                'id' => $row->id,
                'title' => ucwords(strtolower((string) ($row->nmLengkap ?: 'Tanpa Nama'))),
                'jenis' => $this->scheduleLabel($row->jenis),
                'className' => $this->scheduleEventClass($row->jenis),
            ];
        }

        $weeks = [];
        $cursor = $startOfGrid->copy();

        while ($cursor->lessThanOrEqualTo($endOfGrid)) {
            $week = [];

            for ($day = 0; $day < 7; $day++) {
                $dateKey = $cursor->toDateString();

                $week[] = [
                    'date' => $dateKey,
                    'day' => $cursor->day,
                    'isCurrentMonth' => $cursor->month === $today->month,
                    'isToday' => $cursor->isToday(),
                    'events' => $eventsByDate[$dateKey] ?? [],
                ];

                $cursor->addDay();
            }

            $weeks[] = $week;
        }

        return [
            'monthLabel' => $this->formatMonthYear($today),
            'weekdays' => ['Sen', 'Sel', 'Rab', 'Kam', 'Jum', 'Sab', 'Min'],
            'weeks' => $weeks,
        ];
    }

    private function scheduleBadgeClass(?string $jenis): string
    {
        return match ($jenis) {
            'Sidang' => 'bg-orange-100 text-orange-700',
            'Outline' => 'bg-emerald-100 text-emerald-700',
            'SidHas' => 'bg-amber-100 text-amber-700',
            default => 'bg-slate-200 text-slate-700',
        };
    }

    private function scheduleLabel(?string $jenis): string
    {
        return match ($jenis) {
            'Sidang' => 'Sidang',
            'Outline' => 'Outline',
            'SidHas' => 'Seminar Hasil',
            default => $jenis ?? 'Jadwal',
        };
    }

    private function scheduleEventClass(?string $jenis): string
    {
        return match ($jenis) {
            'Sidang' => 'bg-orange-100 text-orange-700 border-orange-200',
            'Outline' => 'bg-emerald-100 text-emerald-700 border-emerald-200',
            'SidHas' => 'bg-amber-100 text-amber-700 border-amber-200',
            default => 'bg-slate-100 text-slate-700 border-slate-200',
        };
    }

    private function formatIndonesianDateTime(?string $value): string
    {
        if (! $value) {
            return '-';
        }

        return Carbon::parse($value)->locale('id')->translatedFormat('j F Y, H:i');
    }

    private function formatMonthYear(Carbon $date): string
    {
        return $date->copy()->locale('id')->translatedFormat('F Y');
    }

    private function legacyUrl(string $path): string
    {
        $baseUrl = rtrim((string) env('LEGACY_BASE_URL', 'http://127.0.0.1:8080'), '/');

        return $baseUrl.'/'.ltrim($path, '/');
    }
}