<?php

namespace App\Console\Commands;

use App\Models\Amministratore;
use App\Services\DistributionService;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Storage;

class ManageDistribution extends Command
{
    /**
     * The name and signature of the console command.
     */
    protected $signature = 'distribution:manage
                          {action : Action to perform (migrate|status|backup|test)}
                          {--administrator= : Administrator code (8 characters)}
                          {--target-server= : Target server URL for migration}
                          {--all : Apply to all administrators}';

    /**
     * The console command description.
     */
    protected $description = 'Manage multi-server distribution of administrators';

    /**
     * Execute the console command.
     */
    public function handle()
    {
        $action = $this->argument('action');
        
        switch ($action) {
            case 'migrate':
                return $this->migrateAdministrator();
            case 'status':
                return $this->showDistributionStatus();
            case 'backup':
                return $this->backupAdministrator();
            case 'test':
                return $this->testDistribution();
            default:
                $this->error("Unknown action: {$action}");
                return 1;
        }
    }

    /**
     * Migra un amministratore verso un altro server
     */
    private function migrateAdministrator()
    {
        $adminCode = $this->option('administrator');
        $targetServer = $this->option('target-server');

        if (!$adminCode) {
            $adminCode = $this->ask('Administrator code (8 characters)');
        }

        if (!$targetServer) {
            $targetServer = $this->ask('Target server URL');
        }

        if (!$adminCode || !$targetServer) {
            $this->error('Both administrator code and target server are required');
            return 1;
        }

        $amministratore = Amministratore::where('codice_amministratore', $adminCode)->first();

        if (!$amministratore) {
            $this->error("Administrator {$adminCode} not found");
            return 1;
        }

        $this->info("Starting migration of administrator {$adminCode} to {$targetServer}");
        
        // Verifica server target
        $this->info('Checking target server health...');
        $healthCheck = DistributionService::checkServerHealth($targetServer);
        
        if (!$healthCheck['success']) {
            $this->error("Target server health check failed: {$healthCheck['error']}");
            return 1;
        }

        $this->info('Target server is healthy and compatible');
        
        // Conferma migrazione
        if (!$this->confirm("Are you sure you want to migrate administrator {$adminCode} to {$targetServer}?")) {
            $this->info('Migration cancelled');
            return 0;
        }

        // Esegui migrazione
        $this->info('Starting migration process...');
        $result = DistributionService::migrateAdministrator($amministratore, $targetServer);

        if ($result['success']) {
            $this->info("✅ Migration completed successfully!");
            $this->info("Administrator {$adminCode} is now accessible at: {$result['new_url']}");
        } else {
            $this->error("❌ Migration failed: {$result['error']}");
            return 1;
        }

        return 0;
    }

    /**
     * Mostra stato della distribuzione
     */
    private function showDistributionStatus()
    {
        $this->info('NetGesCon Multi-Server Distribution Status');
        $this->info('==========================================');

        $stats = DistributionService::getDistributionStats();

        $this->info("Total Administrators: {$stats['total_administrators']}");
        $this->info("Local Administrators: {$stats['local_administrators']}");
        $this->info("Distributed Administrators: {$stats['distributed_administrators']}");
        
        $this->newLine();
        $this->info('Server Distribution:');
        
        if (empty($stats['servers'])) {
            $this->info('  No distributed servers configured');
        } else {
            foreach ($stats['servers'] as $server) {
                $this->info("  {$server['server']}: {$server['administrators_count']} administrators");
            }
        }

        $this->newLine();
        $this->info('Status Distribution:');
        foreach ($stats['status_distribution'] as $status => $count) {
            $this->info("  {$status}: {$count}");
        }

        // Mostra dettagli amministratori distribuiti
        $distributedAdmins = Amministratore::whereNotNull('server_database')->get();
        
        if ($distributedAdmins->isNotEmpty()) {
            $this->newLine();
            $this->info('Distributed Administrators Details:');
            $this->table(
                ['Code', 'Name', 'Server', 'Status', 'Last Backup'],
                $distributedAdmins->map(function ($admin) {
                    return [
                        $admin->codice_amministratore,
                        $admin->nome_completo,
                        $admin->server_database ?: 'localhost',
                        $admin->stato_sincronizzazione,
                        $admin->ultimo_backup ? $admin->ultimo_backup->format('Y-m-d H:i') : 'Never'
                    ];
                })
            );
        }

        return 0;
    }

    /**
     * Esegue backup di un amministratore
     */
    private function backupAdministrator()
    {
        $adminCode = $this->option('administrator');
        $all = $this->option('all');

        if (!$adminCode && !$all) {
            $adminCode = $this->ask('Administrator code (8 characters) or use --all for all administrators');
        }

        if ($all) {
            $this->info('Backing up all administrators...');
            $administrators = Amministratore::all();
        } else {
            $administrators = Amministratore::where('codice_amministratore', $adminCode)->get();
            
            if ($administrators->isEmpty()) {
                $this->error("Administrator {$adminCode} not found");
                return 1;
            }
        }

        $successCount = 0;
        $errorCount = 0;

        foreach ($administrators as $admin) {
            $this->info("Backing up administrator {$admin->codice_amministratore}...");
            
            $result = DistributionService::performDistributedBackup($admin);
            
            if ($result['success']) {
                $this->info("✅ Backup completed for {$admin->codice_amministratore}");
                $successCount++;
            } else {
                $this->error("❌ Backup failed for {$admin->codice_amministratore}: {$result['error']}");
                $errorCount++;
            }
        }

        $this->info("Backup completed: {$successCount} successful, {$errorCount} errors");
        return $errorCount > 0 ? 1 : 0;
    }

    /**
     * Testa la funzionalità di distribuzione
     */
    private function testDistribution()
    {
        $this->info('Testing distribution functionality...');
        
        // Test 1: Verifica struttura cartelle
        $this->info('1. Testing folder structure...');
        $testAdmin = Amministratore::first();
        
        if (!$testAdmin) {
            $this->error('No administrators found for testing');
            return 1;
        }

        $archiveInfo = $testAdmin->getArchiveInfo();
        
        if ($archiveInfo['exists']) {
            $this->info("✅ Archive exists: {$archiveInfo['path']}");
            $this->info("   Size: {$archiveInfo['size_formatted']}");
            $this->info("   Files: {$archiveInfo['files_count']}");
        } else {
            $this->warn("⚠️ Archive not found for {$testAdmin->codice_amministratore}");
        }

        // Test 2: Health check locale
        $this->info('2. Testing local health check...');
        $localUrl = config('app.url');
        $healthCheck = DistributionService::checkServerHealth($localUrl);
        
        if ($healthCheck['success']) {
            $this->info("✅ Local server health check passed");
        } else {
            $this->error("❌ Local server health check failed: {$healthCheck['error']}");
        }

        // Test 3: Backup test
        $this->info('3. Testing backup functionality...');
        $backupResult = $testAdmin->createDatabaseBackup();
        
        if ($backupResult['success']) {
            $this->info("✅ Backup test passed");
            $this->info("   File: {$backupResult['filename']}");
            $this->info("   Size: " . number_format($backupResult['size']) . " bytes");
        } else {
            $this->error("❌ Backup test failed: {$backupResult['error']}");
        }

        // Test 4: Migrazione simulata
        $this->info('4. Testing migration preparation...');
        $migrationResult = $testAdmin->prepareForMigration();
        
        if ($migrationResult['success']) {
            $this->info("✅ Migration preparation test passed");
            $this->info("   Archive: {$migrationResult['zip_file']}");
            $this->info("   Size: " . number_format($migrationResult['size']) . " bytes");
            
            // Cleanup test files
            if (file_exists($migrationResult['zip_file'])) {
                unlink($migrationResult['zip_file']);
            }
            if (file_exists($migrationResult['metadata_file'])) {
                unlink($migrationResult['metadata_file']);
            }
        } else {
            $this->error("❌ Migration preparation test failed: {$migrationResult['error']}");
        }

        $this->info('Distribution testing completed');
        return 0;
    }
}