<?php

namespace App\Services;

use Illuminate\Support\Facades\DB;

class PreprocessingService
{
    /**
     * Helper privat untuk mencari nilai terbanyak (Modus/Kelas Mayoritas)
     * dari tabel data training secara otomatis.
     */
    private function getKelasMayoritas($kolom, $defaultFallback)
    {
        try {
            // Asumsi nama tabel data training adalah 'data_training'
            $modus = DB::table('data_training')
                ->select($kolom, DB::raw('COUNT(*) as total'))
                ->whereNotNull($kolom)
                ->where($kolom, '!=', '')
                ->groupBy($kolom)
                ->orderBy('total', 'DESC')
                ->first();

            return $modus ? $modus->$kolom : $defaultFallback;
        } catch (\Exception $e) {
            return $defaultFallback;
        }
    }

    public function kategoriNilai($nilai)
    {
        if (is_string($nilai) && !is_numeric(trim($nilai))) {
            return trim($nilai);
        }

        $nilai = (float) $nilai;

        if ($nilai >= 90) return 'Tinggi';
        if ($nilai >= 75) return 'Sedang';

        return 'Rendah';
    }

    /**
     * Penanganan dan Pengelompokan / Normalisasi Mata Pelajaran Favorit
     */
    public function kategoriMapelFavorit($mapel)
    {
        if (empty($mapel)) {
            return $this->getKelasMayoritas('mapel_favorit', 'Matematika');
        }

        $mapelClean = trim($mapel);

        $kategoriStandar = [
            'Matematika', 'Bahasa Inggris', 'Biologi', 
            'Fisika', 'Ekonomi', 'Sejarah'
        ];

        foreach ($kategoriStandar as $kat) {
            if (strcasecmp($mapelClean, $kat) === 0) {
                return $kat;
            }
        }

        $mapelRaw = strtolower($mapelClean);

        if (
            str_contains($mapelRaw, 'mat') || str_contains($mapelRaw, 'hitung') || 
            str_contains($mapelRaw, 'kalkulus') || str_contains($mapelRaw, 'angka')
        ) {
            return 'Matematika';
        }

        if (
            str_contains($mapelRaw, 'inggris') || str_contains($mapelRaw, 'english') || 
            str_contains($mapelRaw, 'bing') || str_contains($mapelRaw, 'bahasa asing')
        ) {
            return 'Bahasa Inggris';
        }

        if (
            str_contains($mapelRaw, 'bio') || str_contains($mapelRaw, 'tumbuhan') || 
            str_contains($mapelRaw, 'hewan') || str_contains($mapelRaw, 'anatomi')
        ) {
            return 'Biologi';
        }

        if (
            str_contains($mapelRaw, 'fis') || str_contains($mapelRaw, 'mekanika') || 
            str_contains($mapelRaw, 'listrik')
        ) {
            return 'Fisika';
        }

        if (
            str_contains($mapelRaw, 'eko') || str_contains($mapelRaw, 'akuntansi') || 
            str_contains($mapelRaw, 'keuangan') || str_contains($mapelRaw, 'bisnis')
        ) {
            return 'Ekonomi';
        }

        if (
            str_contains($mapelRaw, 'sej') || str_contains($mapelRaw, 'sosio') || 
            str_contains($mapelRaw, 'sejarah') || str_contains($mapelRaw, 'ips')
        ) {
            return 'Sejarah';
        }

        return $this->getKelasMayoritas('mapel_favorit', 'Matematika');
    }

    public function kategoriMinat($minat)
    {
        if (empty($minat)) {
            return $this->getKelasMayoritas('minat', 'Teknologi Info & Pemrograman');
        }

        $minatClean = trim($minat);

        $kategoriStandar = [
            'Budidaya Tanaman', 'Kimia Pangan', 'Budidaya Ternak', 
            'Teknologi Info & Pemrograman', 'Energi & Tek Mesin', 
            'Bahasa & Komunikasi', 'Bisnis', 'Kesehatan'
        ];

        foreach ($kategoriStandar as $kat) {
            if (strcasecmp($minatClean, $kat) === 0) {
                return $kat;
            }
        }

        $minatRaw = strtolower($minatClean);

        // 1. Teknologi Informasi & Pemrograman (JTI Polije)
        if (
            str_contains($minatRaw, 'coding') || str_contains($minatRaw, 'jaringan') || 
            str_contains($minatRaw, 'rekayasa perangkat lunak') || str_contains($minatRaw, 'rpl') || 
            str_contains($minatRaw, 'pemrograman') || str_contains($minatRaw, 'cyber') || 
            str_contains($minatRaw, 'komputer') || str_contains($minatRaw, 'informatika') || 
            str_contains($minatRaw, 'info & pemrog') || str_contains($minatRaw, 'olah data') || 
            str_contains($minatRaw, 'data') || str_contains($minatRaw, 'game') || 
            str_contains($minatRaw, 'web') || str_contains($minatRaw, 'aplikasi') || 
            str_contains($minatRaw, 'software') || str_contains($minatRaw, 'developer')
        ) {
            return 'Teknologi Info & Pemrograman';
        }

        // 2. Bahasa, Media & Komunikasi
        if (
            str_contains($minatRaw, 'masyarakat') || str_contains($minatRaw, 'bahasa') || 
            str_contains($minatRaw, 'wisata') || str_contains($minatRaw, 'media') || 
            str_contains($minatRaw, 'komunikasi') || str_contains($minatRaw, 'konten') || 
            str_contains($minatRaw, 'content') || str_contains($minatRaw, 'kreator') || 
            str_contains($minatRaw, 'creator') || str_contains($minatRaw, 'youtube') || 
            str_contains($minatRaw, 'desain') || str_contains($minatRaw, 'nulis') || 
            str_contains($minatRaw, 'editing') || str_contains($minatRaw, 'video') || 
            str_contains($minatRaw, 'foto')
        ) {
            return 'Bahasa & Komunikasi';
        }

        // 3. Bisnis & Manajemen Agribisnis
        if (
            str_contains($minatRaw, 'akuntansi') || str_contains($minatRaw, 'admin') || 
            str_contains($minatRaw, 'manajemen') || str_contains($minatRaw, 'industri') || 
            str_contains($minatRaw, 'keuangan') || str_contains($minatRaw, 'investasi') || 
            str_contains($minatRaw, 'bisnis') || str_contains($minatRaw, 'dagang') || 
            str_contains($minatRaw, 'jual') || str_contains($minatRaw, 'pemasaran') || 
            str_contains($minatRaw, 'marketing') || str_contains($minatRaw, 'wirausaha')
        ) {
            return 'Bisnis';
        }

        // 4. Budidaya Tanaman / Pertanian
        if (
            str_contains($minatRaw, 'tani') || str_contains($minatRaw, 'kebun') || 
            str_contains($minatRaw, 'agronomi') || str_contains($minatRaw, 'benih') || 
            str_contains($minatRaw, 'tanaman') || str_contains($minatRaw, 'budidaya tanaman') || 
            str_contains($minatRaw, 'hortikultura') || str_contains($minatRaw, 'lahan')
        ) {
            return 'Budidaya Tanaman';
        }

        // 5. Kimia Pangan & Teknologi Pertanian
        if (
            str_contains($minatRaw, 'kimia') || str_contains($minatRaw, 'pangan') || 
            str_contains($minatRaw, 'proses') || str_contains($minatRaw, 'olah makanan') || 
            str_contains($minatRaw, 'kuliner') || str_contains($minatRaw, 'gizi pangan')
        ) {
            return 'Kimia Pangan';
        }

        // 6. Budidaya Ternak / Peternakan
        if (
            str_contains($minatRaw, 'ternak') || str_contains($minatRaw, 'hewan') || 
            str_contains($minatRaw, 'pakan') || str_contains($minatRaw, 'unggas') || 
            str_contains($minatRaw, 'budidaya ternak') || str_contains($minatRaw, 'pelihara')
        ) {
            return 'Budidaya Ternak';
        }

        // 7. Energi & Teknik Mesin
        if (
            str_contains($minatRaw, 'mesin') || str_contains($minatRaw, 'otomotif') || 
            str_contains($minatRaw, 'listrik') || str_contains($minatRaw, 'energi') || 
            str_contains($minatRaw, 'tek mesin') || str_contains($minatRaw, 'robot')
        ) {
            return 'Energi & Tek Mesin';
        }

        // 8. Kesehatan
        if (
            str_contains($minatRaw, 'medis') || str_contains($minatRaw, 'gizi') || 
            str_contains($minatRaw, 'sehat') || str_contains($minatRaw, 'klinik') || 
            str_contains($minatRaw, 'obat') || str_contains($minatRaw, 'rawat') || 
            str_contains($minatRaw, 'rekam medis')
        ) {
            return 'Kesehatan';
        }

        return $this->getKelasMayoritas('minat', 'Teknologi Info & Pemrograman');
    }

    public function kategoriCitaCita($cita)
    {
        if (empty($cita)) {
            return $this->getKelasMayoritas('cita_cita', 'IT');
        }

        $citaClean = trim($cita);

        $kategoriStandar = [
            'Ahli Agronomi', 'Peternak', 'Pengusaha', 'Ahli Gizi', 
            'Manager Rantai Pasok', 'Manajer', 'Quality Control', 
            'Petani Modern', 'Teknisi', 'Bahasa & Pariwisata', 'IT'
        ];

        foreach ($kategoriStandar as $kat) {
            if (strcasecmp($citaClean, $kat) === 0) {
                return $kat;
            }
        }

        $citaRaw = strtolower($citaClean);

        if (str_contains($citaRaw, 'agronomi') || str_contains($citaRaw, 'ahli agronomi')) return 'Ahli Agronomi';
        if (str_contains($citaRaw, 'farm') || str_contains($citaRaw, 'ternak') || str_contains($citaRaw, 'peternak')) return 'Peternak';
        if (str_contains($citaRaw, 'akuntan') || str_contains($citaRaw, 'pajak') || str_contains($citaRaw, 'bisnis') || str_contains($citaRaw, 'pengusaha') || str_contains($citaRaw, 'wirausaha') || str_contains($citaRaw, 'ceo') || str_contains($citaRaw, 'founder') || str_contains($citaRaw, 'pembisnis')) return 'Pengusaha';
        if (str_contains($citaRaw, 'gizi') || str_contains($citaRaw, 'medis') || str_contains($citaRaw, 'rumah sakit') || str_contains($citaRaw, 'kesehatan') || str_contains($citaRaw, 'dokter') || str_contains($citaRaw, 'perawat')) return 'Ahli Gizi';
        if (str_contains($citaRaw, 'rantai pasok') || str_contains($citaRaw, 'supply chain') || str_contains($citaRaw, 'manager rantai pasok') || str_contains($citaRaw, 'logistik')) return 'Manager Rantai Pasok';
        if (str_contains($citaRaw, 'manajer') || str_contains($citaRaw, 'manager') || str_contains($citaRaw, 'pimpinan') || str_contains($citaRaw, 'bos')) return 'Manajer';
        if (str_contains($citaRaw, 'quality control') || str_contains($citaRaw, 'qc') || str_contains($citaRaw, 'tester')) return 'Quality Control';
        if (str_contains($citaRaw, 'petani modern') || str_contains($citaRaw, 'tani') || str_contains($citaRaw, 'kebun')) return 'Petani Modern';

        if (
            str_contains($citaRaw, 'software') || str_contains($citaRaw, 'data engineer') || 
            str_contains($citaRaw, 'network engineer') || str_contains($citaRaw, 'programmer') || 
            preg_match('/\bit\b/i', $citaRaw) || str_contains($citaRaw, 'developer') || 
            str_contains($citaRaw, 'teknisi informatika') || str_contains($citaRaw, 'analis') || 
            str_contains($citaRaw, 'analyst') || str_contains($citaRaw, 'data') || 
            str_contains($citaRaw, 'gamer') || str_contains($citaRaw, 'hacker')
        ) return 'IT';

        if (
            str_contains($citaRaw, 'translator') || str_contains($citaRaw, 'penerjemah') || 
            str_contains($citaRaw, 'tour') || str_contains($citaRaw, 'tour guide') || 
            str_contains($citaRaw, 'pemandu') || str_contains($citaRaw, 'wisata') || 
            str_contains($citaRaw, 'bahasa') || str_contains($citaRaw, 'diplomat') ||
            str_contains($citaRaw, 'content') || str_contains($citaRaw, 'creator') ||
            str_contains($citaRaw, 'kreator') || str_contains($citaRaw, 'youtuber') ||
            str_contains($citaRaw, 'guru') || str_contains($citaRaw, 'dosen') ||
            str_contains($citaRaw, 'pengajar') || str_contains($citaRaw, 'pendidik') || str_contains($citaRaw, 'penyanyi')
        ) return 'Bahasa & Pariwisata'; 

        if (
            str_contains($citaRaw, 'mekanik') || str_contains($citaRaw, 'mesin') || 
            str_contains($citaRaw, 'teknisi') || str_contains($citaRaw, 'engineer') || 
            str_contains($citaRaw, 'rekayasa') || str_contains($citaRaw, 'otomotif')
        ) return 'Teknisi';

        return $this->getKelasMayoritas('cita_cita', 'IT');
    }

    public function kategoriPreferensi($preferensi)
    {
        if (empty($preferensi)) {
            return $this->getKelasMayoritas('preferensi_studi', 'Komputer & Informatika');
        }

        $preferensiClean = trim($preferensi);

        $kategoriStandar = [
            'Pertanian & Hortikultura', 'Komputer & Informatika', 'Ekonomi & Agribisnis',
            'Bahasa & Komunikasi', 'Kesehatan & Gizi', 'Bisnis & Manajemen',
            'Ilmu Peternakan', 'Rekayasa Otomotif', 'Sains & Teknologi'
        ];

        foreach ($kategoriStandar as $kat) {
            if (strcasecmp($preferensiClean, $kat) === 0) {
                return $kat;
            }
        }

        $preferensiRaw = strtolower($preferensiClean);

        if (
            str_contains($preferensiRaw, 'komputer') || str_contains($preferensiRaw, 'informatika') || 
            str_contains($preferensiRaw, 'sistem informasi') || str_contains($preferensiRaw, 'software') ||
            str_contains($preferensiRaw, 'data') || str_contains($preferensiRaw, 'mining') ||
            str_contains($preferensiRaw, 'it') || str_contains($preferensiRaw, 'digital') || 
            str_contains($preferensiRaw, 'aplikasi') || str_contains($preferensiRaw, 'pemrograman') ||
            str_contains($preferensiRaw, 'matematika')
        ) return 'Komputer & Informatika';

        if (
            str_contains($preferensiRaw, 'bahasa') || str_contains($preferensiRaw, 'komunikasi') || 
            str_contains($preferensiRaw, 'pariwisata') || str_contains($preferensiRaw, 'hubungan internasional') ||
            str_contains($preferensiRaw, 'media') || str_contains($preferensiRaw, 'desain') || 
            str_contains($preferensiRaw, 'konten') || str_contains($preferensiRaw, 'content') || str_contains($preferensiRaw, 'kesenian')
        ) return 'Bahasa & Komunikasi';

        if (str_contains($preferensiRaw, 'pertanian') || str_contains($preferensiRaw, 'hortikultura') || str_contains($preferensiRaw, 'tanaman') || str_contains($preferensiRaw, 'agronomi')) return 'Pertanian & Hortikultura';
        if (str_contains($preferensiRaw, 'peternakan') || str_contains($preferensiRaw, 'ternak') || str_contains($preferensiRaw, 'hewan')) return 'Ilmu Peternakan';
        if (str_contains($preferensiRaw, 'ekonomi') || str_contains($preferensiRaw, 'agribisnis') || str_contains($preferensiRaw, 'perbankan')) return 'Ekonomi & Agribisnis';
        if (str_contains($preferensiRaw, 'kesehatan') || str_contains($preferensiRaw, 'gizi') || str_contains($preferensiRaw, 'keperawatan') || str_contains($preferensiRaw, 'kedokteran') || str_contains($preferensiRaw, 'biologi') || str_contains($preferensiRaw, 'farmasi')) return 'Kesehatan & Gizi';
        if (str_contains($preferensiRaw, 'rekayasa') || str_contains($preferensiRaw, 'otomotif') || str_contains($preferensiRaw, 'mesin') || str_contains($preferensiRaw, 'elektro')) return 'Rekayasa Otomotif';
        if (str_contains($preferensiRaw, 'bisnis') || str_contains($preferensiRaw, 'manajemen') || str_contains($preferensiRaw, 'pemasaran') || str_contains($preferensiRaw, 'penjualan') || str_contains($preferensiRaw, 'jual') || str_contains($preferensiRaw, 'akuntansi') || str_contains($preferensiRaw, 'ilmu manajemen')) return 'Bisnis & Manajemen';
        if (str_contains($preferensiRaw, 'sains') || str_contains($preferensiRaw, 'teknologi') || str_contains($preferensiRaw, 'ilmu fisika') || str_contains($preferensiRaw, 'fisika') || str_contains($preferensiRaw, 'ilmu kimia') || str_contains($preferensiRaw, 'kimia')) return 'Sains & Teknologi';

        return $this->getKelasMayoritas('preferensi_studi', 'Komputer & Informatika');
    }

    public function preprocess($row)
    {
        $isObject = is_object($row);

        $nilai = $isObject 
            ? ($row->nilai_raw ?? $row->nilai ?? 0) 
            : ($row['nilai_raw'] ?? $row['nilai'] ?? 0);

        $mapelFavorit = $isObject 
            ? ($row->mapel_favorit_raw ?? $row->mapel_favorit ?? '') 
            : ($row['mapel_favorit_raw'] ?? $row['mapel_favorit'] ?? '');

        $minat = $isObject 
            ? ($row->minat_raw ?? $row->minat ?? '') 
            : ($row['minat_raw'] ?? $row['minat'] ?? '');

        $citaCita = $isObject 
            ? ($row->cita_cita_raw ?? $row->cita_cita ?? '') 
            : ($row['cita_cita_raw'] ?? $row['cita_cita'] ?? '');

        $preferensiStudi = $isObject 
            ? ($row->preferensi_studi_raw ?? $row->preferensi_studi ?? '') 
            : ($row['preferensi_studi_raw'] ?? $row['preferensi_studi'] ?? '');

        $jurusan = $isObject 
            ? ($row->jurusan ?? 'Tidak Diketahui') 
            : ($row['jurusan'] ?? 'Tidak Diketahui');

        return [
            'nilai'            => $this->kategoriNilai($nilai),
            'mapel_favorit'    => $this->kategoriMapelFavorit($mapelFavorit),
            'minat'            => $this->kategoriMinat($minat),
            'cita_cita'        => $this->kategoriCitaCita($citaCita),
            'preferensi_studi' => $this->kategoriPreferensi($preferensiStudi),
            'jurusan'          => trim($jurusan)
        ];
    }
}