<?php

namespace App\Console\Commands;

use App\Services\DecimalPointsDiffReportService;
use Illuminate\Console\Command;

/**
 * Read-only Auswertung der Punkte-Differenzen aus dem Dezimal-Punkte-Fehler,
 * je Berater und Provisionsmonat. Grundlage fuer Gutschrift-Entscheidungen.
 *
 * Schreibt nichts. Hintergrund siehe {@see DecimalPointsDiffReportService}.
 */
class ReportDecimalPointsDiff extends Command
{
    protected $signature = 'points:report-decimal-diff
        {--from= : Startmonat YYYY-MM (Standard: alles)}
        {--to= : Endmonat YYYY-MM (Standard: alles)}
        {--csv= : Pfad fuer CSV-Export je Berater/Monat}
        {--details : Einzelzeilen je Berater ausgeben}';

    protected $description = 'Punkte-Differenzen aus dem Dezimal-Punkte-Fehler je Berater und Monat auswerten (read-only)';

    public function handle(DecimalPointsDiffReportService $service): int
    {
        $from = $this->option('from') ?: null;
        $to = $this->option('to') ?: null;

        $this->info('Punkte-Differenzen'.($from || $to ? " ({$from} bis {$to})" : ' (gesamter Zeitraum)'));
        $this->line('Vorzeichen: + = Berater bekam ZU WENIG (Gutschrift), − = ZU VIEL');
        $this->newLine();

        $report = $service->report($from, $to);

        if ($report['rows'] === []) {
            $this->info('Keine Differenzen gefunden.');

            return self::SUCCESS;
        }

        if ($this->option('details')) {
            $this->info('Je Berater und Monat:');
            $this->table(
                ['Monat', 'Berater', 'Abo-Addon', 'Sammelbest.', 'Homeparty', 'Summe'],
                array_map(fn (array $row) => [
                    sprintf('%02d/%d', $row['month'], $row['year']),
                    mb_strimwidth($row['consultant'], 0, 38, '…'),
                    $this->fmt($row['addon']),
                    $this->fmt($row['collect']),
                    $this->fmt($row['homeparty']),
                    $this->fmt($row['delta']),
                ], $report['rows'])
            );
            $this->newLine();
        }

        $this->info('Je Monat:');
        $this->table(
            ['Monat', 'Berater', 'Abo-Addon', 'Sammelbest.', 'Homeparty', 'Summe'],
            array_map(fn (array $row) => [
                sprintf('%02d/%d', $row['month'], $row['year']),
                $row['users'],
                $this->fmt($row['addon']),
                $this->fmt($row['collect']),
                $this->fmt($row['homeparty']),
                $this->fmt($row['delta']),
            ], $report['by_month'])
        );

        $totals = $report['totals'];
        $this->newLine();
        $this->info('Gesamt:');
        $this->line('  Abo-Einmalartikel (zu wenig):  '.$this->fmt($totals['addon']));
        $this->line('  Sammelbestellungen (zu viel):  '.$this->fmt($totals['collect']));
        $this->line('  Homeparty (zu viel, Obergrenze): '.$this->fmt($totals['homeparty']));
        $this->line('  ── Netto:                      '.$this->fmt($totals['delta']));
        $this->newLine();
        $this->line('  Gutschriften an Berater:       '.$this->fmt($report['credits_owed']));
        $this->line('  Zu viel gebucht:               '.$this->fmt($report['overbooked']));
        $this->line('  Betroffene Berater:            '.$totals['users']);

        if ($csv = $this->option('csv')) {
            $this->writeCsv($csv, $report['rows']);
            $this->newLine();
            $this->info("CSV geschrieben: {$csv}");
        }

        return self::SUCCESS;
    }

    private function fmt(float $value): string
    {
        return ($value > 0 ? '+' : '').number_format($value, 2, ',', '.');
    }

    /**
     * @param  list<array<string, mixed>>  $rows
     */
    private function writeCsv(string $path, array $rows): void
    {
        $handle = fopen($path, 'w');
        fputcsv($handle, ['Jahr', 'Monat', 'UserId', 'Berater', 'AboAddon', 'Sammelbestellung', 'Homeparty', 'Summe'], ';');

        foreach ($rows as $row) {
            fputcsv($handle, [
                $row['year'],
                sprintf('%02d', $row['month']),
                $row['user_id'],
                $row['consultant'],
                number_format((float) $row['addon'], 2, ',', ''),
                number_format((float) $row['collect'], 2, ',', ''),
                number_format((float) $row['homeparty'], 2, ',', ''),
                number_format((float) $row['delta'], 2, ',', ''),
            ], ';');
        }

        fclose($handle);
    }
}