<?php

namespace App\Http\Controllers;

use App\Models\SpLetter;
use App\Models\Setting;
use Barryvdh\DomPDF\Facade\Pdf;
use Illuminate\Http\Request;
use Illuminate\Support\Str;
use Illuminate\View\View;

class SpLetterController extends Controller
{
    public function index(Request $request): View
    {
        $letters = SpLetter::with(['student', 'spThreshold', 'generator'])
            ->when(auth()->user()->isScopedWaliKelas(), fn ($q) => $q->whereHas('student', fn ($qq) => $qq->whereIn('class_id', auth()->user()->homeroomClassIds())))
            ->latest()
            ->paginate(20);

        return view('sp-letters.index', compact('letters'));
    }

    public function show(SpLetter $spLetter): View
    {
        abort_unless(auth()->user()->canViewStudent($spLetter->student_id), 403);

        $spLetter->load(['student', 'spThreshold', 'generator']);
        $school = $this->schoolSettings();

        return view('sp-letters.show', compact('spLetter', 'school'));
    }

    public function print(SpLetter $spLetter)
    {
        abort_unless(auth()->user()->canViewStudent($spLetter->student_id), 403);

        $spLetter->load(['student', 'spThreshold', 'generator']);
        $school = $this->schoolSettings();

        $spLetter->update(['printed_at' => now(), 'status' => 'printed']);

        // HTML print view (untuk cetak langsung dari browser)
        return view('sp-letters.print', compact('spLetter', 'school'));
    }

    /**
     * Unduh PDF surat peringatan (format F4 resmi).
     */
    public function pdf(SpLetter $spLetter)
    {
        abort_unless(auth()->user()->canViewStudent($spLetter->student_id), 403);

        $spLetter->load(['student', 'spThreshold', 'generator']);
        $school = $this->schoolSettings();
        $forPdf = true;

        $spLetter->update(['printed_at' => now(), 'status' => 'printed']);

        $pdf = Pdf::loadView('sp-letters.print', compact('spLetter', 'school', 'forPdf'))
            ->setPaper([0, 0, 595.28, 935.43], 'portrait'); // F4 (210×330 mm)

        $filename = 'SP-'.Str::slug(str_replace(['/', '\\'], '-', $spLetter->letter_number)).'.pdf';

        return $pdf->download($filename);
    }

    /**
     * Ekspor PDF rekap seluruh surat peringatan (daftar, A4 landscape).
     */
    public function exportPdf()
    {
        $letters = SpLetter::with(['student', 'spThreshold', 'generator'])
            ->when(auth()->user()->isScopedWaliKelas(), fn ($q) => $q->whereHas('student', fn ($qq) => $qq->whereIn('class_id', auth()->user()->homeroomClassIds())))
            ->latest()
            ->get();

        $summary = [
            'total' => $letters->count(),
            'total_poin' => $letters->sum('total_points_at_time'),
            'siswa' => $letters->pluck('student_id')->unique()->count(),
            'per_status' => $letters->groupBy('status')->map->count(),
        ];

        $school = $this->schoolSettings();

        $pdf = Pdf::loadView('sp-letters.export-pdf', compact('letters', 'summary', 'school'))
            ->setPaper('a4', 'portrait');

        return $pdf->download('rekap-surat-peringatan-'.now()->format('Ymd-His').'.pdf');
    }

    /**
     * Data sekolah untuk kop surat (format resmi).
     */
    protected function schoolSettings(): array
    {
        return [
            'name' => Setting::getValue('school_name', 'SMK'),
            'address' => Setting::getValue('school_address', ''),
            'phone' => Setting::getValue('school_phone', ''),
            'logo' => Setting::getValue('school_logo', ''),
            'kop_logo' => Setting::getValue('kop_logo', ''),
            'government' => Setting::getValue('school_government', 'PEMERINTAH PROVINSI JAWA TIMUR'),
            'agency' => Setting::getValue('school_agency', 'DINAS PENDIDIKAN'),
            'full_name' => Setting::getValue('school_full_name', Setting::getValue('school_name', 'SMK')),
            'address_detail' => Setting::getValue('school_address_detail', ''),
            'website_email' => Setting::getValue('school_website_email', ''),
            'postal' => Setting::getValue('school_postal', ''),
            'kepala_sekolah' => Setting::getValue('kepala_sekolah_name', ''),
            'place' => Setting::getValue('school_place', 'Wonorejo'),
            'kepala_sekolah_nip' => Setting::getValue('kepala_sekolah_nip', ''),
        ];
    }
}