<?php

namespace App\Console\Commands;

use App\Services\Auth\UserRolePermissionSyncService;
use App\Services\Import\CategoryImporter;
use App\Services\Import\CompanyImporter;
use App\Services\Import\ContactImporter;
use App\Services\Import\ImportContext;
use App\Services\Import\ImportResult;
use App\Services\Import\PressReleaseImporter;
use App\Services\Import\UserAssociationLinker;
use App\Services\Import\UserImporter;
use Illuminate\Console\Command;

/**
 * Legacy-Import-Master-Command (Phase 6 – Datenmigration).
 *
 * Verwendung:
 *   php artisan legacy:import --source=presseecho --dry-run
 *   php artisan legacy:import --source=businessportal24 --step=users
 *   php artisan legacy:import --source=all --step=categories
 *   php artisan legacy:import --source=all --step=link-associations  ← NEU
 *   php artisan legacy:import --source=presseecho --force
 *
 * Schritte (--step):
 *   categories        – Kategorien + Translations (einmalig, beide Portale identisch)
 *   users             – sf_guard_user + sf_guard_user_profile + Rollen
 *   companies         – company + company_user + responsible_company_user
 *   contacts          – contact
 *   press-releases    – press_release + press_release_image + press_release_contact
 *   link-associations – User↔Kontakt direkt verknüpfen (via Firma-Zugehörigkeit)
 *   all               – alle Schritte in korrekter Reihenfolge (Standard)
 */
class ImportLegacyData extends Command
{
    protected $signature = 'legacy:import
                            {--source=all : Portal (presseecho|businessportal24|all)}
                            {--step=all : Schritt (categories|users|companies|contacts|press-releases|link-associations|all)}
                            {--dry-run : Nichts schreiben, nur zählen}
                            {--force : Bereits importierte Datensätze erneut verarbeiten}
                            {--chunk-size=500 : Batch-Größe (Debugging)}';

    protected $description = 'Legacy-Daten aus Presseecho / Businessportal24 in die neue DB importieren.';

    private const STEPS = [
        'categories',
        'users',
        'companies',
        'contacts',
        'press-releases',
        'link-associations',
    ];

    private const PORTALS = ['presseecho', 'businessportal24'];

    public function handle(UserRolePermissionSyncService $roleSync): int
    {
        $source = $this->option('source');
        $step = $this->option('step');
        $isDryRun = (bool) $this->option('dry-run');
        $isForce = (bool) $this->option('force');

        $portals = $source === 'all' ? self::PORTALS : [$source];
        $steps = $step === 'all' ? self::STEPS : [$step];

        if (! $isDryRun && ! $this->option('force')) {
            $this->warn('WICHTIG: Dieser Command schreibt Daten in die Produktions-DB.');
            $this->line('  Portale: '.implode(', ', $portals));
            $this->line('  Schritte: '.implode(', ', $steps));
            $this->newLine();

            if (! $this->confirm('Import starten?')) {
                $this->info('Abgebrochen.');

                return self::SUCCESS;
            }
        }

        if ($isDryRun) {
            $this->warn('[DRY-RUN] Kein tatsächlicher Schreibvorgang.');
        }

        $totalStart = microtime(true);

        foreach ($steps as $currentStep) {
            // link-associations arbeitet auf der neuen DB → einmalig, portal-unabhängig
            if ($currentStep === 'link-associations') {
                $ctx = new ImportContext('all', $isDryRun, $isForce);
                $this->info('▶ Schritt [link-associations] (beide Portale, neue DB)');
                $start = microtime(true);
                $result = app(UserAssociationLinker::class)->run($ctx);
                $elapsed = round(microtime(true) - $start, 1);
                $this->line("  ✓ {$result->summary()} ({$elapsed}s)");

                continue;
            }

            // Kategorien sind portal-übergreifend → nur einmal
            $stepPortals = ($currentStep === 'categories') ? [$portals[0]] : $portals;

            foreach ($stepPortals as $portal) {
                $ctx = new ImportContext($portal, $isDryRun, $isForce);

                $this->info("▶ Schritt [{$currentStep}] Portal [{$portal}]");
                $start = microtime(true);

                $result = $this->runStep($currentStep, $ctx, $roleSync);

                $elapsed = round(microtime(true) - $start, 1);
                $this->line("  ✓ {$result->summary()} ({$elapsed}s)");

                foreach (array_slice($result->errors(), 0, 10) as $err) {
                    $this->warn("  ! {$err}");
                }

                if (count($result->errors()) > 10) {
                    $this->warn('  ! ... und '.(count($result->errors()) - 10).' weitere Fehler.');
                }
            }
        }

        $total = round(microtime(true) - $totalStart, 1);
        $this->newLine();
        $this->info("Import abgeschlossen in {$total}s.");

        return self::SUCCESS;
    }

    private function runStep(
        string $step,
        ImportContext $ctx,
        UserRolePermissionSyncService $roleSync,
    ): ImportResult {
        return match ($step) {
            'categories' => app(CategoryImporter::class)->run($ctx),
            'users' => app(UserImporter::class, ['roleSync' => $roleSync])->run($ctx),
            'companies' => app(CompanyImporter::class)->run($ctx),
            'contacts' => app(ContactImporter::class)->run($ctx),
            'press-releases' => app(PressReleaseImporter::class)->run($ctx),
            default => throw new \InvalidArgumentException("Unbekannter Schritt: {$step}"),
        };
    }
}