<?php

namespace App\Services;

use App\Models\HasilSaw;
use App\Models\Tes;
use App\Models\TesPdf;
use App\Models\Upload;
use Barryvdh\DomPDF\Facade\Pdf;
use Illuminate\Support\Facades\Log;
use Illuminate\Support\Facades\Storage;

class TesPdfService
{
    public function ensureAvailable(Tes $tes): ?TesPdf
    {
        $tesPdf = TesPdf::with('upload')->where('tes_id', $tes->id)->first();

        if ($tesPdf?->upload && $tesPdf->upload->existsOnPublicDisk()) {
            return $tesPdf;
        }

        if (!$this->generateAndStore($tes)) {
            return null;
        }

        return TesPdf::with('upload')->where('tes_id', $tes->id)->first();
    }

    public function generateAndStore(Tes $tes): bool
    {
        $tes->loadMissing('penyakit');

        $hasilList = HasilSaw::where('tes_id', $tes->id)
            ->with('jurusan')
            ->orderBy('peringkat')
            ->get();

        $siswa = $tes->siswa()->with('user')->first();

        $html = view('pages.siswa.hasil-pdf', [
            'siswa'       => $siswa,
            'tesTerakhir' => $tes,
            'hasilList'   => $hasilList,
        ])->render();

        $fileName = 'hasil_tes_' . $tes->id . '.pdf';
        $relativePath = 'hasil_pdf/' . $fileName;

        try {
            $binary = Pdf::loadHTML($html)
                ->setPaper('a4')
                ->output();
        } catch (\Throwable $e) {
            Log::error('DomPDF gagal generate PDF hasil tes', [
                'tes_id' => $tes->id,
                'message' => $e->getMessage(),
            ]);

            return false;
        }

        Storage::disk('public')->put($relativePath, $binary);

        $uploadData = [
            'uploader_user_id' => $siswa?->user_id,
            'file_name'        => $fileName,
            'ext'              => 'PDF',
            'mime_type'        => 'application/pdf',
            'size_mb'          => round(strlen($binary) / 1048576, 2),
            'storage_path'     => $relativePath,
        ];

        $tesPdf = TesPdf::with('upload')->where('tes_id', $tes->id)->first();

        if ($tesPdf?->upload) {
            $tesPdf->upload->update($uploadData);
            $upload = $tesPdf->upload->fresh();
        } else {
            $upload = Upload::create($uploadData);
        }

        TesPdf::updateOrCreate(
            ['tes_id' => $tes->id],
            ['upload_id' => $upload->id, 'generated_at' => now()]
        );

        return true;
    }
}