<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;

class DashboardController extends Controller
{
    private array $issueRules = [
        'Kebersihan' => [
            'keywords' => ['kotor', 'sampah', 'jorok', 'kumuh', 'toilet', 'wc', 'kamar mandi', 'limbah', 'bau', 'bersih'],
            'color'    => 'red',
            'icon'     => '🧹',
            'saran'    => [
                'actions' => ['Tambah tempat sampah', 'Jadwal pembersihan rutin', 'Petugas kebersihan tambahan'],
                'dampak'  => 'Kepuasan meningkat signifikan',
                'tip'     => 'Tambah tempat sampah & jadwal pembersihan rutin.',
            ],
        ],
        'Parkir' => [
            'keywords' => ['parkir', 'lahan parkir', 'tempat parkir', 'parkiran', 'motor', 'mobil'],
            'color'    => 'orange',
            'icon'     => '🚗',
            'saran'    => [
                'actions' => ['Penataan area parkir', 'Tarif transparan', 'Petugas lebih ramah'],
                'dampak'  => 'Mengurangi keluhan',
                'tip'     => 'Sistem parkir lebih rapi dan transparan.',
            ],
        ],
        'Harga / Tiket' => [
            'keywords' => ['mahal', 'harga', 'tiket', 'bayar', 'biaya', 'tarif', 'terjangkau'],
            'color'    => 'yellow',
            'icon'     => '🎟️',
            'saran'    => [
                'actions' => ['Evaluasi harga tiket', 'Promo wisata', 'Diskon tertentu'],
                'dampak'  => 'Daya tarik meningkat',
                'tip'     => 'Penyesuaian harga tiket agar lebih terjangkau.',
            ],
        ],
        'Fasilitas' => [
            'keywords' => ['fasilitas', 'gazebo', 'warung', 'kantin', 'kamar ganti', 'musholla', 'wifi', 'bangku', 'kursi'],
            'color'    => 'green',
            'icon'     => '🏗️',
            'saran'    => [
                'actions' => ['Perbaiki fasilitas rusak', 'Tambah fasilitas umum', 'Perawatan berkala'],
                'dampak'  => 'Kenyamanan pengunjung meningkat',
                'tip'     => 'Fasilitas lengkap & terawat meningkatkan kepuasan.',
            ],
        ],
        'Keramaian' => [
            'keywords' => ['ramai', 'macet', 'antri', 'sesak', 'penuh', 'padat', 'berdesakan'],
            'color'    => 'blue',
            'icon'     => '👥',
            'saran'    => [
                'actions' => ['Atur kapasitas pengunjung', 'Sistem antrean', 'Jam kunjungan fleksibel'],
                'dampak'  => 'Pengalaman pengunjung lebih nyaman',
                'tip'     => 'Manajemen kapasitas pengunjung lebih baik.',
            ],
        ],
    ];

   public function index(Request $request)
{
    $tab = $request->input('tab', 'dashboard');
    $wisata = $tab === 'analisis' ? $request->wisata : null;
    $destinasi = $tab === 'rekomendasi' ? $request->destinasi : null;

    // ================================================================
    // PERIODE BULAN YANG DIPILIH
    // ================================================================
    $periodeBulan = $request->input('periode_bulan', now()->format('Y-m'));

    [$tahun, $bulan] = explode('-', $periodeBulan);

    // ================================================================
    // AMBIL SEMUA PERIODE & PERIODE AKTIF
    // ================================================================
    $periodeList = DB::table('periode_analisis as p')
        ->whereExists(function ($q) {
            $q->select(DB::raw(1))
                ->from('ulasan as u')
                ->whereColumn('u.periode_id', 'p.id');
        })
        ->orWhereExists(function ($q) {
            $q->select(DB::raw(1))
                ->from('hasil_analisis as h')
                ->whereColumn('h.periode_id', 'p.id');
        })
        ->orderBy('p.id', 'desc')
        ->select('p.*')
        ->get();

    // Cocokkan pakai kolom bulan & tahun
    $periodeAktif = $periodeList->first(function ($p) use ($tahun, $bulan) {
        return $p->tahun == (int)$tahun && $p->bulan == (int)$bulan;
    });

    // Jika tidak ada data di bulan tsb
    $noDataPesan = null;
    if (!$periodeAktif) {
        $namaBulanDipilih = \Carbon\Carbon::createFromDate($tahun, $bulan, 1)
            ->locale('id')->isoFormat('MMMM YYYY');
        $noDataPesan = "Tidak ada data untuk bulan {$namaBulanDipilih}.";
    }

    $periodeId = $periodeAktif->id ?? null;

    $evaluasi = DB::table('evaluasi_model')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->latest()->first();

    // ================================================================
    // TOTAL ULASAN
    // ================================================================
    $totalUlasan = DB::table('ulasan')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
        ->count();

    // ================================================================
    // CEK ADA ANALISIS ATAU BELUM
    // ================================================================
    $hasAnalisis = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->count() > 0;

    // ================================================================
    // HITUNG SENTIMEN
    // ================================================================
    $positif = DB::table('hasil_analisis')
        ->where('sentimen', 'positif')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
        ->count();

    $negatif = DB::table('hasil_analisis')
        ->where('sentimen', 'negatif')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
        ->count();

    $netral = DB::table('hasil_analisis')
        ->where('sentimen', 'netral')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
        ->count();

    $totalSentimen = $positif + $negatif + $netral;

    $stats = [
        'total'          => $totalUlasan,
        'positif_persen' => $totalSentimen > 0 ? round(($positif / $totalSentimen) * 100) : 0,
        'negatif_persen' => $totalSentimen > 0 ? round(($negatif / $totalSentimen) * 100) : 0,
        'netral_persen'  => $totalSentimen > 0 ? round(($netral  / $totalSentimen) * 100) : 0,
    ];

    // ================================================================
    // CHART DATA
    // ================================================================
    // $chartSentimen = $hasAnalisis
    //     ? DB::table('hasil_analisis')
    //         ->select('sentimen', DB::raw('count(*) as total'))
    //         ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
    //         ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
    //         ->groupBy('sentimen')
    //         ->orderByRaw("FIELD(sentimen, 'positif', 'negatif', 'netral')")
    //         ->get()
    //     : collect();

    $rawSentimen = DB::table('hasil_analisis')
    ->select('sentimen', DB::raw('count(*) as total'))
    ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
    ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
    ->groupBy('sentimen')
    ->pluck('total', 'sentimen');

    $chartSentimen = collect([
        ['sentimen' => 'positif', 'total' => $rawSentimen['positif'] ?? 0],
        ['sentimen' => 'negatif', 'total' => $rawSentimen['negatif'] ?? 0],
        ['sentimen' => 'netral',  'total' => $rawSentimen['netral'] ?? 0],
    ]);

    $chartDestinasi = $hasAnalisis
        ? DB::table('hasil_analisis')
            ->select(
                'wisata',
                DB::raw("SUM(CASE WHEN sentimen = 'positif' THEN 1 ELSE 0 END) as positif"),
                DB::raw("SUM(CASE WHEN sentimen = 'negatif' THEN 1 ELSE 0 END) as negatif"),
                DB::raw("SUM(CASE WHEN sentimen = 'netral'  THEN 1 ELSE 0 END) as netral")
            )
            ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
            ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
            ->groupBy('wisata')
            ->get()
        : collect();

    // ================================================================
    // TOTAL PER DESTINASI + WORD CLOUD + LAST UPDATE
    // ================================================================
    $totalPerWisata = DB::table('ulasan')
        ->select('wisata', DB::raw('count(*) as total'))
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->groupBy('wisata')
        ->get();

    $texts   = DB::table('hasil_analisis')
    ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
    ->pluck('ulasan_bersih')
    ->toArray();
    $allText = count($texts) > 0 ? implode(' ', $texts) : '';

    $lastUpdate  = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->latest('created_at')->value('created_at');

    $destinasiList = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->select('wisata')->distinct()->pluck('wisata');
    $wisataList = $destinasiList;

    $totalDestinasiAnalisis = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->distinct('wisata')
        ->count('wisata');

    $totalDestinasiBerkeluhan = DB::table('hasil_analisis')
        ->where('sentimen', 'negatif')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->distinct('wisata')
        ->count('wisata');

    $hasil = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
        ->paginate(10);

    $jumlahKelasAnalisis = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
        ->distinct('sentimen')
        ->count('sentimen');

    $totalHasilAnalisis = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($wisata && $wisata != 'Semua Destinasi', fn($q) => $q->where('wisata', $wisata))
        ->count();

    // ================================================================
    // REKOMENDASI
    // ================================================================
    $ulasanNegatif = DB::table('hasil_analisis')
        ->where('sentimen', 'negatif')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($destinasi && $destinasi != 'Semua Destinasi', fn($q) => $q->where('wisata', $destinasi))
        ->pluck('ulasan_bersih')
        ->toArray();

    $textRek  = strtolower(implode(' ', $ulasanNegatif));
    $wordsRek = array_filter(preg_split('/\s+/', $textRek));

    $issueSkor = [];
    foreach ($this->issueRules as $kategori => $rule) {
        $skor = 0;
        foreach ($rule['keywords'] as $kw) {
            $skor += substr_count($textRek, $kw);
        }
        $issueSkor[$kategori] = $skor;
    }
    arsort($issueSkor);
    $issueSkorAktif = array_filter($issueSkor, fn($skor) => $skor > 0);
    $totalSkorIsu = array_sum($issueSkorAktif) ?: 1;

    $isuUtama = [];
    foreach (array_slice($issueSkorAktif, 0, 5, true) as $nama => $skor) {
        $isuUtama[] = [
            'nama'   => $nama,
            'skor'   => $skor,
            'persen' => round(($skor / $totalSkorIsu) * 100),
            'color'  => $this->issueRules[$nama]['color'],
            'icon'   => $this->issueRules[$nama]['icon'],
        ];
    }

    $stopwords = [
        'yang','dan','di','ke','dari','untuk','dengan','ini','itu','tidak',
        'ada','juga','sangat','lebih','sudah','bisa','tapi','karena','pada',
        'akan','atau','saya','kami','mereka','nya','ga','gak','udah','pas',
        'kita','sih','deh','aja','ya','yg','tp','bgt','jadi','biar','kalau',
    ];
    $freq = array_count_values($wordsRek);
    foreach ($stopwords as $sw) { unset($freq[$sw]); }
    foreach (array_keys($freq) as $w) {
        if (mb_strlen($w) < 3) unset($freq[$w]);
    }
    arsort($freq);
    $kataDominan = array_slice($freq, 0, 10, true);

    $saranPerbaikan = [];
    foreach (array_slice($issueSkorAktif, 0, 3, true) as $nama => $skor) {
        $saranPerbaikan[] = [
            'nama' => 'Perbaikan ' . $nama,
            'tip'  => $this->issueRules[$nama]['saran']['tip'],
            'icon' => $this->issueRules[$nama]['icon'],
        ];
    }

    $prioritas = [];
    $rank = 1;
    foreach (array_slice($issueSkorAktif, 0, 3, true) as $nama => $skor) {
        $prioritas[] = [
            'rank'    => $rank++,
            'nama'    => $nama,
            'icon'    => $this->issueRules[$nama]['icon'],
            'actions' => $this->issueRules[$nama]['saran']['actions'],
            'dampak'  => $this->issueRules[$nama]['saran']['dampak'],
            'color'   => $this->issueRules[$nama]['color'],
        ];
    }

    $positifRek = DB::table('hasil_analisis')
        ->where('sentimen', 'positif')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($destinasi && $destinasi != 'Semua Destinasi', fn($q) => $q->where('wisata', $destinasi))
        ->count();

    $negatifRek = DB::table('hasil_analisis')
        ->where('sentimen', 'negatif')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($destinasi && $destinasi != 'Semua Destinasi', fn($q) => $q->where('wisata', $destinasi))
        ->count();

    $totalSentimenRek = DB::table('hasil_analisis')
        ->when($periodeId, fn($q) => $q->where('periode_id', $periodeId))
        ->when($destinasi && $destinasi != 'Semua Destinasi', fn($q) => $q->where('wisata', $destinasi))
        ->count() ?: 1;

    $totalNegatif    = $negatifRek;
    $persenNegatif   = round(($negatifRek / $totalSentimenRek) * 100, 2);
    $tingkatKepuasan = round(($positifRek / $totalSentimenRek) * 100);
    $labelKepuasan   = match(true) {
        $tingkatKepuasan >= 80 => 'Baik',
        $tingkatKepuasan >= 60 => 'Sedang',
        default                => 'Kurang',
    };
    $isuDominan       = $isuUtama[0]['nama']   ?? '-';
    $isuDominanPersen = $isuUtama[0]['persen'] ?? 0;

    // ================================================================
    // RETURN VIEW
    // ================================================================
    return view('dashboard', compact(
        'stats',
        'chartSentimen',
        'chartDestinasi',
        'totalPerWisata',
        'allText',
        'lastUpdate',
        'hasAnalisis',
        'destinasiList',
        'wisataList',
        'totalDestinasiAnalisis',
        'totalDestinasiBerkeluhan',
        'hasil',
        'jumlahKelasAnalisis',
        'totalHasilAnalisis',
        'evaluasi',
        'totalNegatif',
        'persenNegatif',
        'tingkatKepuasan',
        'labelKepuasan',
        'isuUtama',
        'isuDominan',
        'isuDominanPersen',
        'kataDominan',
        'saranPerbaikan',
        'prioritas',
        'periodeList',
        'periodeAktif',
        'noDataPesan',  // ← tambahan baru
    ))->with([
        'scraperDestinations' => $this->scraperDestinations(),
    ]);
}

    private function scraperDestinations(): array
    {
        return [
            'Pantai Papuma',
            'Pantai Watu Ulo',
            'Teluk Love',
            'Kebun Teh Gunung Gambir',
        ];
    }
}