<?php

namespace App\Http\Controllers;

use App\Models\Jawaban;
use App\Models\JawabanDetail;
use App\Models\Soal;
use App\Models\SoalDetail;
use Carbon\Carbon;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\Validator;
use Illuminate\Support\Str;

class SoalController extends Controller
{
    public function index(Request $request)
    {
        $daftarSoal = Soal::orderBy('judul_soal')->get();

        if ($daftarSoal->isEmpty()) {
            abort(404, 'Data soal tidak ditemukan.');
        }

        $selectedSoalId = (int) $request->query('soal_id', $daftarSoal->first()->id);
        $pegawai = session('pegawai') ?? [];
        $pegawaiId = is_array($pegawai) ? ($pegawai['id'] ?? null) : null;
        if (!$request->boolean('start')) {
            $completedSoalIds = [];
            if ($pegawaiId) {
                $completedSoalIds = Jawaban::where('pegawai_id', $pegawaiId)
                    ->pluck('lms_mutu_soal_id')
                    ->toArray();
            }
            return view('soal.list', [
                'daftarSoal' => $daftarSoal,
                'completedSoalIds' => $completedSoalIds,
            ]);
        }

        $soal = Soal::with('soalDetail')->find($selectedSoalId);

        if (!$soal) {
            abort(404, 'Data soal tidak ditemukan.');
        }

        $detailSoal = $soal->soalDetail()
            ->orderBy('hal')
            ->orderBy('id')
            ->get();

        $daftarHal = $detailSoal->pluck('hal')
            ->map(function ($value) {
                return is_null($value) ? null : (int) $value;
            })
            ->filter(function ($value) {
                return !is_null($value);
            })
            ->unique()
            ->sort()
            ->values();

        if ($daftarHal->isEmpty()) {
            $daftarHal = collect([1]);
        }

        $hal = (int) $request->query('hal', $daftarHal->first());

        if (!$daftarHal->contains($hal)) {
            $hal = $daftarHal->first();
        }

        $detailSoal = $detailSoal->map(function ($detail) use ($daftarHal) {
            $detail->hal = $detail->hal ?? $daftarHal->first();
            return $detail;
        });

        $groupInfoByHal = [];
        foreach ($detailSoal as $detail) {
            $halValue = (int) ($detail->hal ?? $daftarHal->first());
            if (!array_key_exists($halValue, $groupInfoByHal)) {
                $groupInfoByHal[$halValue] = [
                    'nama' => $detail->group_nama,
                    'keterangan' => $detail->group_keterangan,
                ];
                continue;
            }

            if (empty($groupInfoByHal[$halValue]['nama']) && !empty($detail->group_nama)) {
                $groupInfoByHal[$halValue]['nama'] = $detail->group_nama;
            }

            if (empty($groupInfoByHal[$halValue]['keterangan']) && !empty($detail->group_keterangan)) {
                $groupInfoByHal[$halValue]['keterangan'] = $detail->group_keterangan;
            }
        }
        $soal->setRelation('soalDetail', $detailSoal);

        $halPertama = $daftarHal->first() ?? $hal;
        $existingJawaban = [];
        $formLocked = false;
        if ($pegawaiId) {
            $jawabanTersimpan = Jawaban::where('pegawai_id', $pegawaiId)
                ->where('lms_mutu_soal_id', $soal->id)
                ->latest('tanggal_isi')
                ->first();
            if ($jawabanTersimpan) {
                $existingJawaban = $jawabanTersimpan->jawabanDetail
                    ->pluck('jawaban', 'lms_mutu_soal_detail_id')
                    ->toArray();
                $formLocked = true;
            }
        }
        $prefillJawaban = [];
        return view('soal.index', [
            'soal' => $soal,
            'hal' => $hal,
            'halPertama' => $halPertama,
            'daftarHal' => $daftarHal,
            'totalHal' => $daftarHal->count(),
            'soalId' => $soal->id,
            'pegawai' => [],
            'prefillJawaban' => $prefillJawaban,
            'existingJawaban' => $existingJawaban,
            'formLocked' => $formLocked,
            'groupInfoByHal' => $groupInfoByHal,
        ]);
    }

    public function store(Request $request)
    {
        $validator = Validator::make($request->all(), [
            'lms_mutu_soal_id' => 'required|integer',
            'hal' => 'nullable|integer|min:1',
            'jawaban' => 'nullable|array',
            'jawaban.*' => 'nullable',
            'jawaban_lainnya' => 'nullable|array',
            'jawaban_lainnya.*' => 'nullable|string',
        ]);

        $validator->after(function ($validator) use ($request) {
            $jawabanUtama = $request->input('jawaban', []);
            $jawabanLainnya = $request->input('jawaban_lainnya', []);

            foreach ($jawabanUtama as $detailId => $answer) {
                if ($answer === 'Lainnya') {
                    $jawabanIsian = $jawabanLainnya[$detailId] ?? null;
                    if (!$jawabanIsian) {
                        $validator->errors()->add("jawaban_lainnya.$detailId", 'Jawaban lainnya wajib diisi.');
                    }
                }
            }
        });
        $validated = $validator->validate();
        $soalId = $validated['lms_mutu_soal_id'];

        $allDetails = SoalDetail::where('lms_mutu_soal_id', $soalId)
            ->get(['id', 'soal'])
            ->keyBy('id');

        $jawabanUtama = $validated['jawaban'] ?? [];
        $jawabanLainnya = $validated['jawaban_lainnya'] ?? [];
        $namaResponden = null;
        $jawabanBaru = null;
        $unitKerja = null;
        $pegawai = session('pegawai') ?? [];
        $pegawaiId = is_array($pegawai) ? ($pegawai['id'] ?? null) : 1;
        DB::connection('dbLmsMutu')->transaction(function () use (&$jawabanBaru, $validated, $jawabanUtama, $jawabanLainnya, $allDetails, &$namaResponden, &$unitKerja, $pegawaiId) {
            $jawabanBaru = Jawaban::create([
                'lms_mutu_soal_id' => $validated['lms_mutu_soal_id'],
                'pegawai_id' => $pegawaiId,
                'tanggal_isi' => Carbon::now()->addHour(7),
            ]);

            foreach ($allDetails as $detailId => $detail) {
                $answer = $jawabanUtama[$detailId] ?? null;

                if (is_array($answer)) {
                    $answer = json_encode($answer);
                }

                if ($answer === 'Lainnya' && !empty($jawabanLainnya[$detailId])) {
                    $answer = $jawabanLainnya[$detailId];
                }

                $pertanyaan = null;
                $decoded = json_decode($detail->soal, true);
                $pertanyaan = Str::lower(trim($decoded['soal'] ?? ''));


                if ($pertanyaan && $answer) {
                    if (Str::contains($pertanyaan, 'nama/inisial responden')) {
                        $namaResponden = $answer;
                    }

                    if (Str::contains($pertanyaan, 'unit/area kerja anda saat ini')) {
                        $unitKerja = $answer;
                    }
                }

                JawabanDetail::create([
                    'lms_mutu_jawaban_id' => $jawabanBaru->id,
                    'lms_mutu_soal_detail_id' => (int) $detailId,
                    'jawaban' => $answer,
                ]);
            }

            $updatePayload = [];

            if (!empty($namaResponden)) {
                $updatePayload['nama'] = $namaResponden;
            }

            if (!empty($unitKerja)) {
                $updatePayload['unit'] = $unitKerja;
            }

            if (!empty($updatePayload)) {
                $jawabanBaru->update($updatePayload);
            }
        });

        
        return redirect()->route('soal.thankyou')
            ->with('success', 'Jawaban berhasil disimpan.');
    }

    public function thankYou()
    {
        return view('soal.thank-you');
    }

    public function redirectSmart()
    {
        $data = request()->input('data');

        $json = base64_decode($data);

        $array = json_decode($json, true);
        session(['pegawai' => $array]);
        return redirect('/');
    }

    protected function generatePrefillJawaban($detailSoal, $pegawai): array
    {
        if (!is_iterable($detailSoal) || !is_array($pegawai) || empty($pegawai)) {
            return [];
        }

        $prefill = [];
        foreach ($detailSoal as $detail) {
            $decoded = json_decode($detail->soal, true) ?? [];
            $question = $decoded['soal'] ?? '';
            $value = $this->mapPegawaiValueToQuestion($question, $pegawai);
            if ($value !== null && $value !== '') {
                $prefill[$detail->id] = $value;
            }
        }

        return $prefill;
    }

    protected function mapPegawaiValueToQuestion(?string $question, array $pegawai): ?string
    {
        if (!$question) {
            return null;
        }

        $normalized = Str::lower($question);

        if (Str::contains($normalized, 'nama/inisial responden')) {
            return $pegawai['namaLengkap'] ?? $pegawai['nama'] ?? null;
        }

        if (Str::contains($normalized, 'nomor telepon') || Str::contains($normalized, 'hp')) {
            return $pegawai['noHandphone'] ?? null;
        }

        if (Str::contains($normalized, 'jenis kelamin')) {
            return $pegawai['jenisKelamin']['jenisKelamin'] ?? $pegawai['jenisKelamin']['namaExternal'] ?? null;
        }

        if (Str::contains($normalized, 'unit/area kerja')) {
            return $pegawai['ruangan']['namaRuangan'] ?? $pegawai['ruangan']['namaExternal'] ?? null;
        }

        if (Str::contains($normalized, 'posisi kerja')) {
            return $pegawai['jabatanInternal']['namaJabatan']
                ?? $pegawai['jabatanFungsional']['namaJabatan']
                ?? $pegawai['jenisPegawai']['jenisPegawai']
                ?? null;
        }

        if (Str::contains($normalized, 'email')) {
            return $pegawai['email'] ?? null;
        }

        if (Str::contains($normalized, 'nip') || Str::contains($normalized, 'nomor identitas')) {
            return $pegawai['nipPns'] ?? $pegawai['noIdentitas'] ?? null;
        }

        if (Str::contains($normalized, 'nama faskes')) {
            return $pegawai['ruangan']['namaExternal'] ?? 'RSAB HARAPAN KITA';
        }

        return null;
    }
}