<?php

namespace App\Http\Controllers;

use App\Services\LevelReportService;
use Illuminate\Http\Request;
use Illuminate\Http\Response;

class LevelReportsController extends Controller
{
    private $levelReportService;

    public function __construct(LevelReportService $levelReportService)
    {
        $this->levelReportService = $levelReportService;
    }

    /**
     * Zeige Level-Aufstieg Reports
     */
    public function index(Request $request)
    {
        // Filter aus Request extrahieren
        $filters = [
            'month' => $request->get('month'),
            'year' => $request->get('year'),
            'user_id' => $request->get('user_id'),
            'only_not_updated' => $request->boolean('not_updated')
        ];

        // Lade Level-Aufstiege
        $promotions = $this->levelReportService->getLevelPromotions($filters);
        $statistics = $this->levelReportService->getStatistics($promotions);

        // Verfügbare Jahre für Filter
        $availableYears = range(date('Y'), date('Y') - 5);
        $availableMonths = [
            1 => 'Januar',
            2 => 'Februar',
            3 => 'März',
            4 => 'April',
            5 => 'Mai',
            6 => 'Juni',
            7 => 'Juli',
            8 => 'August',
            9 => 'September',
            10 => 'Oktober',
            11 => 'November',
            12 => 'Dezember'
        ];

        return view('admin.level-reports.index', compact(
            'promotions',
            'statistics',
            'filters',
            'availableYears',
            'availableMonths'
        ));
    }

    /**
     * CSV Export
     */
    public function export(Request $request)
    {
        // Filter aus Request extrahieren
        $filters = [
            'month' => $request->get('month'),
            'year' => $request->get('year'),
            'user_id' => $request->get('user_id'),
            'only_not_updated' => $request->boolean('not_updated')
        ];

        // Lade Level-Aufstiege
        $promotions = $this->levelReportService->getLevelPromotions($filters);

        if ($promotions->isEmpty()) {
            return redirect()->back()->with('error', 'Keine Daten für Export gefunden.');
        }

        // Erstelle CSV
        $filename = 'level_promotions_' . date('Y-m-d_H-i-s') . '.csv';
        $filepath = $this->levelReportService->exportToCsv($promotions, $filename);

        // Download CSV
        return response()->download($filepath, $filename)->deleteFileAfterSend(true);
    }
}