<?php

namespace App\Http\Controllers;

use App\Models\RumahIbadah;
use App\Models\RumahMiskin;
use Barryvdh\DomPDF\Facade\Pdf;
use Illuminate\Support\Str;

class ExportController extends Controller
{
    public function allMiskinPDF()
    {
        $miskin      = RumahMiskin::orderBy('kondisi_rumah')->get();
        $ibadahCount = RumahIbadah::count();
        $totalJiwa   = $miskin->sum('jumlah_orang');
        $totalKK     = $miskin->sum('jumlah_kk');

        $pdf = Pdf::loadView('exports.laporan-miskin', compact('miskin', 'ibadahCount', 'totalJiwa', 'totalKK'));
        $pdf->setPaper('a4', 'landscape');
        return $pdf->download('laporan-keluarga-miskin.pdf');
    }

    public function radiusMiskinPDF(int $ibadahId, int $radius)
    {
        $ibadah    = RumahIbadah::findOrFail($ibadahId);
        $allMiskin = RumahMiskin::all();

        $miskin = $allMiskin->filter(fn($m) => $this->haversineDistance(
            $ibadah->latitude, $ibadah->longitude,
            $m->latitude, $m->longitude
        ) <= $radius);

        $totalJiwa = $miskin->sum('jumlah_orang');
        $totalKK   = $miskin->sum('jumlah_kk');

        $pdf = Pdf::loadView('exports.laporan-radius', compact('ibadah', 'miskin', 'radius', 'totalJiwa', 'totalKK'));
        $pdf->setPaper('a4', 'portrait');
        $filename = 'laporan-radius-' . Str::slug($ibadah->nama) . '-' . $radius . 'm.pdf';
        return $pdf->download($filename);
    }

    private function haversineDistance(float $lat1, float $lon1, float $lat2, float $lon2): float
    {
        $R    = 6371000;
        $dLat = deg2rad($lat2 - $lat1);
        $dLon = deg2rad($lon2 - $lon1);
        $a    = sin($dLat / 2) ** 2 + cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * sin($dLon / 2) ** 2;
        return 2 * $R * asin(sqrt($a));
    }
}