<?php

namespace App\Http\Controllers;

use App\Models\Province;
use App\Models\Student;
use App\Models\StudentParent;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\DB;
use Illuminate\Validation\Rule;
use Illuminate\View\View;

class PublicStudentSelfServiceController extends Controller
{
    public function index(): View
    {
        return view('public.student-self-service.verify');
    }

    public function verify(Request $request): RedirectResponse
    {
        $data = $request->validate([
            'identity_number' => ['required', 'string', 'max:30'],
            'access_code' => ['required', 'string', 'max:20'],
        ], [
            'identity_number.required' => 'NIS atau NISN wajib diisi.',
            'access_code.required' => 'Kode akses wajib diisi.',
        ]);

        $student = Student::query()
            ->where('self_service_access_code', strtoupper(trim($data['access_code'])))
            ->where(function ($query) use ($data) {
                $query->where('student_number', $data['identity_number'])
                    ->orWhere('nisn', $data['identity_number']);
            })
            ->first();

        if (! $student) {
            return back()
                ->withInput()
                ->withErrors([
                    'identity_number' => 'Data siswa tidak ditemukan atau kode akses tidak cocok.',
                ]);
        }

        $request->session()->put('student_self_service.student_id', $student->id);
        $request->session()->put('student_self_service.verified_at', now()->toIso8601String());

        $student->forceFill([
            'self_service_last_access_at' => now(),
            'self_service_status' => $student->self_service_status === 'submitted' ? 'submitted' : 'draft',
        ])->save();

        return redirect()->route('public.student-self-service.edit');
    }

    public function edit(Request $request): View|RedirectResponse
    {
        $student = $this->resolveVerifiedStudent($request);

        if (! $student) {
            return redirect()->route('public.student-self-service.index')
                ->withErrors([
                    'identity_number' => 'Sesi pelengkapan data tidak valid atau sudah berakhir. Silakan verifikasi ulang.',
                ]);
        }

        $student->load(['parents', 'academicYear', 'department', 'classRoom']);

        return view('public.student-self-service.edit', [
            'student' => $student,
            'genders' => [
                'L' => 'Laki-laki',
                'P' => 'Perempuan',
            ],
            'religions' => [
                'Islam' => 'Islam',
                'Kristen' => 'Kristen',
                'Katolik' => 'Katolik',
                'Hindu' => 'Hindu',
                'Buddha' => 'Buddha',
                'Khonghucu' => 'Khonghucu',
                'Lainnya' => 'Lainnya',
            ],
            'provinces' => Province::orderBy('name')->pluck('name', 'id'),
            'parentRelationLabels' => [
                'father' => 'Ayah',
                'mother' => 'Ibu',
                'guardian' => 'Wali',
            ],
            'educationOptions' => [
                'Tidak Sekolah' => 'Tidak Sekolah',
                'Tidak Tamat SD' => 'Tidak Tamat SD',
                'SD' => 'SD',
                'SMP' => 'SMP',
                'SLTA' => 'SLTA',
                'D1' => 'D1',
                'D2' => 'D2',
                'D3' => 'D3',
                'D4' => 'D4',
                'S1' => 'S1',
                'S2' => 'S2',
                'S3' => 'S3',
                'Lainnya' => 'Lainnya',
            ],
        ]);
    }

    public function update(Request $request): RedirectResponse
    {
        $student = $this->resolveVerifiedStudent($request);

        if (! $student) {
            return redirect()->route('public.student-self-service.index')
                ->withErrors([
                    'identity_number' => 'Sesi pelengkapan data tidak valid atau sudah berakhir. Silakan verifikasi ulang.',
                ]);
        }

        $data = $request->validate([
            'full_name' => ['required', 'string', 'max:150'],
            'gender' => ['required', Rule::in(['L', 'P'])],
            'place_of_birth' => ['nullable', 'string', 'max:100'],
            'date_of_birth' => ['nullable', 'date'],
            'religion' => ['nullable', 'string', 'max:50'],
            'nationality' => ['nullable', 'string', 'max:50'],
            'family_card_number' => ['nullable', 'string', 'max:30'],
            'child_order' => ['nullable', 'integer', 'min:1', 'max:50'],
            'number_of_siblings' => ['nullable', 'integer', 'min:0', 'max:50'],
            'phone_number' => ['nullable', 'string', 'max:30'],
            'email' => ['nullable', 'email', 'max:100'],
            'address' => ['nullable', 'string'],
            'province_id' => ['nullable', 'exists:provinces,id'],
            'regency_id' => ['nullable', 'exists:regencies,id'],
            'district_id' => ['nullable', 'exists:districts,id'],
            'village_id' => ['nullable', 'exists:villages,id'],
            'postal_code' => ['nullable', 'string', 'max:10'],
            'parents.father.name' => ['nullable', 'string', 'max:150'],
            'parents.father.nik' => ['nullable', 'string', 'max:30'],
            'parents.father.birth_year' => ['nullable', 'integer', 'min:1900', 'max:' . now()->year],
            'parents.father.education' => ['nullable', Rule::in(['Tidak Sekolah', 'Tidak Tamat SD', 'SD', 'SMP', 'SLTA', 'D1', 'D2', 'D3', 'D4', 'S1', 'S2', 'S3', 'Lainnya'])],
            'parents.father.occupation' => ['nullable', 'string', 'max:100'],
            'parents.father.phone_number' => ['nullable', 'string', 'max:30'],
            'parents.father.address' => ['nullable', 'string'],
            'parents.father.is_alive' => ['nullable', 'boolean'],
            'parents.mother.name' => ['nullable', 'string', 'max:150'],
            'parents.mother.nik' => ['nullable', 'string', 'max:30'],
            'parents.mother.birth_year' => ['nullable', 'integer', 'min:1900', 'max:' . now()->year],
            'parents.mother.education' => ['nullable', Rule::in(['Tidak Sekolah', 'Tidak Tamat SD', 'SD', 'SMP', 'SLTA', 'D1', 'D2', 'D3', 'D4', 'S1', 'S2', 'S3', 'Lainnya'])],
            'parents.mother.occupation' => ['nullable', 'string', 'max:100'],
            'parents.mother.phone_number' => ['nullable', 'string', 'max:30'],
            'parents.mother.address' => ['nullable', 'string'],
            'parents.mother.is_alive' => ['nullable', 'boolean'],
            'parents.guardian.name' => ['nullable', 'string', 'max:150'],
            'parents.guardian.nik' => ['nullable', 'string', 'max:30'],
            'parents.guardian.birth_year' => ['nullable', 'integer', 'min:1900', 'max:' . now()->year],
            'parents.guardian.education' => ['nullable', Rule::in(['Tidak Sekolah', 'Tidak Tamat SD', 'SD', 'SMP', 'SLTA', 'D1', 'D2', 'D3', 'D4', 'S1', 'S2', 'S3', 'Lainnya'])],
            'parents.guardian.occupation' => ['nullable', 'string', 'max:100'],
            'parents.guardian.phone_number' => ['nullable', 'string', 'max:30'],
            'parents.guardian.address' => ['nullable', 'string'],
            'parents.guardian.is_alive' => ['nullable', 'boolean'],
            'submit_action' => ['required', Rule::in(['draft', 'submit'])],
        ]);

        DB::transaction(function () use ($student, $data) {
            $student->fill([
                'full_name' => $data['full_name'],
                'gender' => $data['gender'],
                'place_of_birth' => $data['place_of_birth'] ?? null,
                'date_of_birth' => $data['date_of_birth'] ?? null,
                'religion' => $data['religion'] ?? null,
                'nationality' => $data['nationality'] ?? 'Indonesia',
                'family_card_number' => $data['family_card_number'] ?? null,
                'child_order' => $data['child_order'] ?? null,
                'number_of_siblings' => $data['number_of_siblings'] ?? null,
                'phone_number' => $data['phone_number'] ?? null,
                'email' => $data['email'] ?? null,
                'address' => $data['address'] ?? null,
                'province_id' => $data['province_id'] ?? null,
                'regency_id' => $data['regency_id'] ?? null,
                'district_id' => $data['district_id'] ?? null,
                'village_id' => $data['village_id'] ?? null,
                'postal_code' => $data['postal_code'] ?? null,
                'province' => ! empty($data['province_id']) ? DB::table('provinces')->where('id', $data['province_id'])->value('name') : null,
                'city' => ! empty($data['regency_id']) ? DB::table('regencies')->where('id', $data['regency_id'])->value('name') : null,
                'district' => ! empty($data['district_id']) ? DB::table('districts')->where('id', $data['district_id'])->value('name') : null,
                'village' => ! empty($data['village_id']) ? DB::table('villages')->where('id', $data['village_id'])->value('name') : null,
                'self_service_status' => $data['submit_action'] === 'submit' ? 'submitted' : 'draft',
                'self_service_last_access_at' => now(),
                'self_service_submitted_at' => $data['submit_action'] === 'submit' ? now() : null,
            ])->save();

            foreach (['father', 'mother', 'guardian'] as $relationType) {
                $parentData = $data['parents'][$relationType] ?? [];
                $hasMeaningfulValue = collect($parentData)
                    ->except('is_alive')
                    ->filter(fn ($value) => filled($value))
                    ->isNotEmpty();

                $existingParent = $student->parents()->where('relation_type', $relationType)->first();

                if (! $hasMeaningfulValue) {
                    if ($existingParent) {
                        $existingParent->delete();
                    }

                    continue;
                }

                $payload = [
                    'name' => $parentData['name'] ?? '-',
                    'nik' => $parentData['nik'] ?? null,
                    'birth_year' => $parentData['birth_year'] ?? null,
                    'education' => $parentData['education'] ?? null,
                    'occupation' => $parentData['occupation'] ?? null,
                    'phone_number' => $parentData['phone_number'] ?? null,
                    'address' => $parentData['address'] ?? null,
                    'is_alive' => (bool) ($parentData['is_alive'] ?? false),
                ];

                if ($existingParent) {
                    $existingParent->update($payload);
                } else {
                    $student->parents()->create([
                        'relation_type' => $relationType,
                        ...$payload,
                    ]);
                }
            }
        });

        return redirect()->route('public.student-self-service.edit')
            ->with('success', $data['submit_action'] === 'submit'
                ? 'Data berhasil dikirim. Silakan tunggu pemeriksaan admin sekolah.'
                : 'Draft berhasil disimpan. Anda bisa melanjutkan lagi nanti selama sesi masih aktif.');
    }

    protected function resolveVerifiedStudent(Request $request): ?Student
    {
        $studentId = $request->session()->get('student_self_service.student_id');

        if (! $studentId) {
            return null;
        }

        return Student::find($studentId);
    }
}