<?php

namespace App\Console\Commands;

use App\Models\UserAbo;
use App\Models\UserAboStatusHistory;
use Carbon\Carbon;
use Illuminate\Console\Command;

/**
 * Einmaliger Nachtrag fuer Bestandsdaten (Ticket A3): fuellt `status_reason`
 * und `paused_until` aus Status, Pausenfeldern und dem Statusprotokoll
 * (`user_abo_status_histories`). Laesst bereits gefuellte Werte unberuehrt und
 * schreibt ueber den reinen Query-Builder (`toBase()`), damit weder Model-Events
 * noch `updated_at` angefasst werden — der Eloquent-Builder wuerde den
 * Zeitstempel mitschreiben (Audit 18.09., F5).
 */
class AboBackfillStatusReasons extends Command
{
    protected $signature = 'abo:backfill-status-reasons {--dry-run : Nur zaehlen, nichts schreiben}';

    protected $description = 'status_reason / paused_until fuer bestehende Abos aus Status und Statusprotokoll nachtragen';

    public function handle(): int
    {
        $dryRun = (bool) $this->option('dry-run');
        $counts = ['payment_failed' => 0, 'cancelled' => 0, 'deactivated' => 0, 'paused' => 0];

        UserAbo::withTrashed()
            ->whereNull('status_reason')
            ->whereIn('status', [3, 4, 6])
            ->orderBy('id')
            ->chunkById(500, function ($abos) use (&$counts, $dryRun): void {
                foreach ($abos as $abo) {
                    [$reason, $bucket] = match ((int) $abo->status) {
                        3 => [UserAbo::REASON_PAYMENT_FAILED, 'payment_failed'],
                        4 => [UserAbo::REASON_PREFIX_CANCELLED.$this->actorFromHistory($abo, UserAboStatusHistory::ACTION_CANCELLED), 'cancelled'],
                        default => [UserAbo::REASON_PREFIX_DEACTIVATED.$this->actorFromHistory($abo, UserAboStatusHistory::ACTION_DEACTIVATED), 'deactivated'],
                    };

                    $counts[$bucket]++;

                    if (! $dryRun) {
                        UserAbo::withTrashed()->whereKey($abo->id)->toBase()->update(['status_reason' => $reason]);
                    }
                }
            });

        UserAbo::query()
            ->whereNull('paused_until')
            ->where('status', 2)
            ->where('active', true)
            ->where('pause_count', '>', 0)
            ->whereNotNull('last_pause_date')
            ->orderBy('id')
            ->chunkById(500, function ($abos) use (&$counts, $dryRun): void {
                foreach ($abos as $abo) {
                    $until = $abo->pausedUntil();

                    if ($until === null || $until->lt(Carbon::today())) {
                        continue;
                    }

                    $counts['paused']++;

                    if (! $dryRun) {
                        UserAbo::whereKey($abo->id)->toBase()->update([
                            'paused_until' => $until->toDateString(),
                            'status_reason' => $abo->status_reason ?: UserAbo::REASON_PREFIX_PAUSED.$this->actorFromHistory($abo, UserAboStatusHistory::ACTION_PAUSED),
                        ]);
                    }
                }
            });

        $this->table(['Zustand', 'Abos'], [
            ['Zahlung fehlgeschlagen', $counts['payment_failed']],
            ['Gekuendigt', $counts['cancelled']],
            ['Deaktiviert', $counts['deactivated']],
            ['Pausiert (laufend)', $counts['paused']],
        ]);

        $this->info($dryRun ? 'DRY-RUN, nichts geschrieben.' : 'Nachtrag abgeschlossen.');

        return self::SUCCESS;
    }

    private function actorFromHistory(UserAbo $abo, string $action): string
    {
        $entry = UserAboStatusHistory::query()
            ->where('user_abo_id', $abo->id)
            ->where('action', $action)
            ->orderByDesc('id')
            ->first();

        return UserAbo::reasonActorFromView($entry?->view);
    }
}