<?php

namespace App\RSpade\Commands\Migrate;

use Illuminate\Console\Command;
use Symfony\Component\Process\Process;
use App\RSpade\SchemaQuality\SchemaQualityChecker;
use Illuminate\Support\Facades\DB;
use App\RSpade\Core\Database\MigrationPaths;

class Migrate_Commit_Command extends Command
{
    use PrivilegedCommandTrait;
    protected $signature = 'migrate:commit';
    protected $description = 'Commit the migration changes and end the migration session';

    protected $backup_dir = '/var/lib/mysql_backup';
    protected $flag_file = '/var/www/html/.migrating';

    public function handle()
    {
        // Check if in migration mode
        if (!file_exists($this->flag_file)) {
            $this->error('[WARNING]  No migration session in progress!');
            $this->info('Nothing to commit.');
            return 1;
        }

        $session_info = json_decode(file_get_contents($this->flag_file), true);
        $started_at = $session_info['started_at'] ?? 'unknown';

        $this->info(' Migration session started at: ' . $started_at);
        
        // Check for unran migrations
        $this->info("\n Checking for unran migrations...");
        $unran_migrations = $this->check_unran_migrations();
        if (!empty($unran_migrations)) {
            $this->error('[ERROR] Found unran migration files:');
            foreach ($unran_migrations as $migration) {
                $this->error('   - ' . $migration);
            }
            $this->info('');
            $this->warn('Please either:');
            $this->warn('  1. Run them with: php artisan migrate');
            $this->warn('  2. Remove the migration files');
            return 1;
        }
        $this->info('[OK] All migrations have been executed.');
        
        // Run schema inspection in development mode
        if (app()->environment() !== 'production') {
            $this->info("\n Running database schema standards check...");
            
            $checker = new SchemaQualityChecker();
            $violations = $checker->check();
            
            if ($checker->has_violations()) {
                $this->error('[ERROR] Schema standards check failed with ' . $checker->get_violation_count() . ' violation(s):');
                $this->info('');
                
                // Display violations
                $grouped = $checker->get_violations_by_severity();
                foreach (['critical', 'high', 'medium', 'low'] as $severity) {
                    if (!empty($grouped[$severity])) {
                        $this->line(strtoupper($severity) . ' VIOLATIONS:');
                        foreach ($grouped[$severity] as $violation) {
                            $this->line($violation->format_output());
                        }
                    }
                }
                
                $this->info('');
                $this->error('[ERROR] Rolling back migration session due to schema violations...');
                
                // Execute rollback
                $this->call('migrate:rollback');
                
                $this->info('');
                $this->warn('[WARNING]  Migration has been rolled back. Fix the schema violations and try again.');
                return 1;
            }
            
            $this->info('[OK] Schema standards check passed.');
        }
        
        $this->info("\n Committing migration changes...");

        try {
            // Step 1: Remove backup directory
            if (is_dir($this->backup_dir)) {
                $this->info('[1]  Removing backup snapshot...');
                $this->run_privileged_command(['rm', '-rf', $this->backup_dir]);
            }

            // Step 2: Remove migration flag
            $this->info('[2]  Removing migration flag...');
            unlink($this->flag_file);

            // Success
            $this->info('');
            $this->info('[OK] Migration changes committed successfully!');
            $this->info('');
            $this->line('• The backup has been deleted');
            $this->line('• Migration mode has been disabled');
            $this->line('• The web UI is now accessible');
            $this->info('');

            // Run post-migration tasks in development mode
            if (app()->environment() !== 'production') {
                // Regenerate model constants from enum definitions
                $this->info('Regenerating model constants...');
                $this->call('rsx:constants:regenerate');

                // Recompile bundles (must use passthru for fresh process)
                $this->newLine();
                $this->info('Recompiling bundles...');
                passthru('php artisan rsx:bundle:compile');
            }

            return 0;
        } catch (\Exception $e) {
            $this->error('[ERROR] Failed to commit: ' . $e->getMessage());
            return 1;
        }
    }

    /**
     * Run a maintenance artisan command
     */
    protected function runMaintenanceCommand(string $command): void
    {
        try {
            $this->call($command);
        } catch (\Exception $e) {
            $this->warn("Warning: Could not run maintenance command {$command}: " . $e->getMessage());
        }
    }

    /**
     * Check for unran migrations
     */
    protected function check_unran_migrations(): array
    {
        $unran = [];

        // Get list of migration files from all paths
        $files = [];
        foreach (MigrationPaths::get_all_paths() as $path) {
            if (is_dir($path)) {
                $path_files = glob($path . '/*.php');
                if ($path_files) {
                    $files = array_merge($files, $path_files);
                }
            }
        }
        
        // Get list of already run migrations from database
        $table = config('database.migrations', 'migrations');
        $ran_migrations = DB::table($table)->pluck('migration')->toArray();
        
        // Check each file
        foreach ($files as $file) {
            $filename = basename($file, '.php');
            if (!in_array($filename, $ran_migrations)) {
                $unran[] = $filename;
            }
        }
        
        return $unran;
    }
    
}