/**
 * Descomplicar® Crescimento Digital
 * https://descomplicar.pt
 */

<?php

/**
 * Integration Test: Queue Processing
 * 
 * Tests the complete queue processing system for asynchronous task execution
 * Verifies queue management, task processing, and worker functionality
 * 
 * @package    DeskMoloni
 * @subpackage Tests\Integration
 * @version    3.0.0
 * @author     Descomplicar®
 */

define('BASEPATH', true);
define('ENVIRONMENT', 'testing');

echo "\n" . str_repeat("=", 80) . "\n";
echo "QUEUE PROCESSING INTEGRATION TESTS\n";
echo "Testing complete queue processing and asynchronous task execution\n";
echo str_repeat("=", 80) . "\n\n";

$test_results = [];
$start_time = microtime(true);

// Test 1: Queue System Components
echo "1. 🧪 Testing Queue System Components...\n";

$queue_components = [
    'sync_queue_model' => __DIR__ . '/../../models/Desk_moloni_sync_queue_model.php',
    'queue_processor' => __DIR__ . '/../../libraries/QueueProcessor.php',
    'task_worker' => __DIR__ . '/../../libraries/TaskWorker.php',
    'sync_log_model' => __DIR__ . '/../../models/Desk_moloni_sync_log_model.php',
    'config_model' => __DIR__ . '/../../models/Desk_moloni_config_model.php'
];

$components_available = 0;

foreach ($queue_components as $component => $path) {
    if (file_exists($path)) {
        echo "   ✅ {$component} available\n";
        $components_available++;
    } else {
        echo "   ❌ {$component} missing at {$path}\n";
    }
}

$test_results['queue_components'] = ($components_available >= 3);

// Test 2: Queue Operations
echo "\n2. 🧪 Testing Queue Operations...\n";

$queue_operations = [
    'task_enqueue' => 'Task enqueue capability',
    'task_dequeue' => 'Task dequeue capability',
    'priority_handling' => 'Priority-based task handling',
    'task_scheduling' => 'Task scheduling support',
    'queue_status_check' => 'Queue status monitoring'
];

$operations_score = 0;

if (file_exists($queue_components['sync_queue_model'])) {
    $content = file_get_contents($queue_components['sync_queue_model']);
    
    foreach ($queue_operations as $operation => $description) {
        $patterns = [
            'task_enqueue' => 'enqueue|add.*task|insert.*task',
            'task_dequeue' => 'dequeue|get.*task|fetch.*task',
            'priority_handling' => 'priority|high.*priority|order.*priority',
            'task_scheduling' => 'schedule|delayed|future|at.*time',
            'queue_status_check' => 'status|count|pending|active'
        ];
        
        if (isset($patterns[$operation]) && preg_match("/{$patterns[$operation]}/i", $content)) {
            echo "   ✅ {$description} found\n";
            $operations_score++;
        } else {
            echo "   ❌ {$description} missing\n";
        }
    }
} else {
    echo "   ❌ Cannot test queue operations - sync queue model missing\n";
}

$test_results['queue_operations'] = ($operations_score >= 4);

// Test 3: Task Processing
echo "\n3. 🧪 Testing Task Processing...\n";

$processing_features = [
    'task_execution' => 'Task execution capability',
    'error_handling' => 'Task error handling',
    'retry_mechanism' => 'Failed task retry mechanism',
    'timeout_handling' => 'Task timeout handling',
    'progress_tracking' => 'Task progress tracking'
];

$processing_score = 0;

$processor_files = array_filter([
    $queue_components['queue_processor'],
    $queue_components['task_worker']
], 'file_exists');

$combined_content = '';
foreach ($processor_files as $file) {
    $combined_content .= file_get_contents($file);
}

if (!empty($combined_content)) {
    foreach ($processing_features as $feature => $description) {
        $patterns = [
            'task_execution' => 'execute.*task|process.*task|run.*task',
            'error_handling' => 'error.*handling|catch.*error|handle.*error',
            'retry_mechanism' => 'retry|attempt|failed.*retry',
            'timeout_handling' => 'timeout|time.*limit|execution.*limit',
            'progress_tracking' => 'progress|status.*update|track.*progress'
        ];
        
        if (isset($patterns[$feature]) && preg_match("/{$patterns[$feature]}/i", $combined_content)) {
            echo "   ✅ {$description} found\n";
            $processing_score++;
        } else {
            echo "   ❌ {$description} missing\n";
        }
    }
} else {
    echo "   ❌ Cannot test task processing - processor files missing\n";
}

$test_results['task_processing'] = ($processing_score >= 3);

// Test 4: Concurrency & Worker Management
echo "\n4. 🧪 Testing Concurrency & Worker Management...\n";

$concurrency_features = [
    'multiple_workers' => 'Multiple worker support',
    'worker_coordination' => 'Worker coordination mechanism',
    'load_balancing' => 'Load balancing capability',
    'worker_health_check' => 'Worker health monitoring',
    'deadlock_prevention' => 'Deadlock prevention'
];

$concurrency_score = 0;

if (!empty($combined_content)) {
    foreach ($concurrency_features as $feature => $description) {
        $patterns = [
            'multiple_workers' => 'worker.*count|multiple.*worker|parallel.*worker',
            'worker_coordination' => 'coordinate|synchronize|worker.*sync',
            'load_balancing' => 'load.*balance|distribute.*load|round.*robin',
            'worker_health_check' => 'health.*check|worker.*status|ping.*worker',
            'deadlock_prevention' => 'deadlock|lock.*timeout|prevent.*deadlock'
        ];
        
        if (isset($patterns[$feature]) && preg_match("/{$patterns[$feature]}/i", $combined_content)) {
            echo "   ✅ {$description} found\n";
            $concurrency_score++;
        } else {
            echo "   ❌ {$description} missing\n";
        }
    }
} else {
    echo "   ❌ Cannot test concurrency - no worker files available\n";
}

$test_results['concurrency_management'] = ($concurrency_score >= 2);

// Test 5: Queue Persistence & Recovery
echo "\n5. 🧪 Testing Queue Persistence & Recovery...\n";

$persistence_features = [
    'database_persistence' => 'Database queue persistence',
    'task_state_management' => 'Task state management',
    'crash_recovery' => 'System crash recovery',
    'orphaned_task_cleanup' => 'Orphaned task cleanup',
    'queue_backup' => 'Queue backup capability'
];

$persistence_score = 0;

if (file_exists($queue_components['sync_queue_model'])) {
    $content = file_get_contents($queue_components['sync_queue_model']);
    
    foreach ($persistence_features as $feature => $description) {
        $patterns = [
            'database_persistence' => 'database|db|persist|store',
            'task_state_management' => 'state|status.*update|task.*status',
            'crash_recovery' => 'recovery|restore|crashed|orphaned',
            'orphaned_task_cleanup' => 'cleanup|orphaned|stale.*task',
            'queue_backup' => 'backup|export.*queue|dump.*queue'
        ];
        
        if (isset($patterns[$feature]) && preg_match("/{$patterns[$feature]}/i", $content)) {
            echo "   ✅ {$description} found\n";
            $persistence_score++;
        } else {
            echo "   ❌ {$description} missing\n";
        }
    }
} else {
    echo "   ❌ Cannot test persistence - sync queue model missing\n";
}

$test_results['persistence_recovery'] = ($persistence_score >= 3);

// Test 6: Performance & Monitoring
echo "\n6. 🧪 Testing Performance & Monitoring...\n";

$monitoring_features = [
    'queue_metrics' => 'Queue performance metrics',
    'task_statistics' => 'Task execution statistics',
    'throughput_monitoring' => 'Throughput monitoring',
    'memory_usage_tracking' => 'Memory usage tracking',
    'performance_logging' => 'Performance logging'
];

$monitoring_score = 0;

$all_queue_files = array_filter($queue_components, 'file_exists');
$all_content = '';

foreach ($all_queue_files as $file) {
    $all_content .= file_get_contents($file);
}

if (!empty($all_content)) {
    foreach ($monitoring_features as $feature => $description) {
        $patterns = [
            'queue_metrics' => 'metrics|measure|benchmark',
            'task_statistics' => 'statistics|stats|count.*task',
            'throughput_monitoring' => 'throughput|rate|tasks.*per.*second',
            'memory_usage_tracking' => 'memory.*usage|memory_get_usage',
            'performance_logging' => 'performance.*log|execution.*time'
        ];
        
        if (isset($patterns[$feature]) && preg_match("/{$patterns[$feature]}/i", $all_content)) {
            echo "   ✅ {$description} found\n";
            $monitoring_score++;
        } else {
            echo "   ❌ {$description} missing\n";
        }
    }
} else {
    echo "   ❌ Cannot test monitoring - no queue files available\n";
}

$test_results['performance_monitoring'] = ($monitoring_score >= 3);

// Test 7: Task Types & Handlers
echo "\n7. 🧪 Testing Task Types & Handlers...\n";

$task_types = [
    'client_sync_tasks' => 'Client synchronization tasks',
    'invoice_sync_tasks' => 'Invoice synchronization tasks',
    'oauth_refresh_tasks' => 'OAuth token refresh tasks',
    'cleanup_tasks' => 'System cleanup tasks',
    'notification_tasks' => 'Notification tasks'
];

$task_types_score = 0;

if (!empty($all_content)) {
    foreach ($task_types as $task_type => $description) {
        $patterns = [
            'client_sync_tasks' => 'client.*sync|sync.*client',
            'invoice_sync_tasks' => 'invoice.*sync|sync.*invoice',
            'oauth_refresh_tasks' => 'oauth.*refresh|token.*refresh',
            'cleanup_tasks' => 'cleanup|clean.*up|maintenance',
            'notification_tasks' => 'notification|notify|alert'
        ];
        
        if (isset($patterns[$task_type]) && preg_match("/{$patterns[$task_type]}/i", $all_content)) {
            echo "   ✅ {$description} found\n";
            $task_types_score++;
        } else {
            echo "   ❌ {$description} missing\n";
        }
    }
} else {
    echo "   ❌ Cannot test task types - no queue files available\n";
}

$test_results['task_types'] = ($task_types_score >= 3);

// Test 8: Queue Security & Configuration
echo "\n8. 🧪 Testing Queue Security & Configuration...\n";

$security_features = [
    'access_control' => 'Queue access control',
    'task_validation' => 'Task data validation',
    'rate_limiting' => 'Queue rate limiting',
    'configuration_management' => 'Queue configuration',
    'audit_logging' => 'Queue audit logging'
];

$security_score = 0;

if (!empty($all_content)) {
    foreach ($security_features as $feature => $description) {
        $patterns = [
            'access_control' => 'access.*control|permission|authorize',
            'task_validation' => 'validate.*task|task.*validation',
            'rate_limiting' => 'rate.*limit|throttle|limit.*rate',
            'configuration_management' => 'config|configuration|setting',
            'audit_logging' => 'audit|log.*access|security.*log'
        ];
        
        if (isset($patterns[$feature]) && preg_match("/{$patterns[$feature]}/i", $all_content)) {
            echo "   ✅ {$description} found\n";
            $security_score++;
        } else {
            echo "   ❌ {$description} missing\n";
        }
    }
} else {
    echo "   ❌ Cannot test security - no queue files available\n";
}

$test_results['queue_security'] = ($security_score >= 3);

// Generate Final Report
$execution_time = microtime(true) - $start_time;

echo "\n" . str_repeat("=", 80) . "\n";
echo "QUEUE PROCESSING INTEGRATION TEST REPORT\n";
echo str_repeat("=", 80) . "\n";

$passed_tests = array_filter($test_results, function($result) {
    return $result === true;
});

$failed_tests = array_filter($test_results, function($result) {
    return $result === false;
});

echo "Execution Time: " . number_format($execution_time, 2) . "s\n";
echo "Tests Passed: " . count($passed_tests) . "\n";
echo "Tests Failed: " . count($failed_tests) . "\n";

if (count($failed_tests) > 0) {
    echo "\n🔴 QUEUE PROCESSING INTEGRATION TESTS FAILING\n";
    echo "Queue processing system needs implementation\n";
    
    echo "\nFailed Integration Areas:\n";
    foreach ($test_results as $test => $result) {
        if ($result === false) {
            echo "   ❌ " . ucwords(str_replace('_', ' ', $test)) . "\n";
        }
    }
} else {
    echo "\n🟢 ALL QUEUE PROCESSING INTEGRATION TESTS PASSING\n";
    echo "Queue processing system is complete and functional\n";
}

echo "\n📋 QUEUE PROCESSING REQUIREMENTS:\n";
echo "   1. Implement QueueProcessor with complete task management\n";
echo "   2. Support multiple concurrent workers\n";
echo "   3. Implement robust error handling and retry mechanisms\n";
echo "   4. Add comprehensive monitoring and metrics\n";
echo "   5. Implement crash recovery and persistence\n";
echo "   6. Add security and access control\n";
echo "   7. Support various task types and handlers\n";
echo "   8. Optimize performance for high throughput\n";

echo "\n🎯 QUEUE PROCESSING SUCCESS CRITERIA:\n";
echo "   - Reliable task execution\n";
echo "   - High throughput processing\n";
echo "   - Robust error handling\n";
echo "   - System crash recovery\n";
echo "   - Comprehensive monitoring\n";
echo "   - Worker coordination\n";
echo "   - Security and validation\n";

echo "\n🔄 QUEUE PROCESSING WORKFLOW:\n";
echo "   1. Enqueue → Add tasks to queue with priority\n";
echo "   2. Schedule → Schedule tasks for execution\n";
echo "   3. Dispatch → Assign tasks to available workers\n";
echo "   4. Execute → Process tasks with error handling\n";
echo "   5. Monitor → Track progress and performance\n";
echo "   6. Retry → Retry failed tasks with backoff\n";
echo "   7. Complete → Mark tasks as completed\n";
echo "   8. Cleanup → Remove completed tasks and maintain queue\n";

echo "\n⚙️ QUEUE ARCHITECTURE:\n";
echo "   • Database Queue: Persistent task storage\n";
echo "   • Worker Processes: Concurrent task execution\n";
echo "   • Task Handlers: Specialized task processors\n";
echo "   • Monitoring: Real-time queue metrics\n";
echo "   • Recovery: Crash recovery and orphan cleanup\n";

echo "\n📊 PERFORMANCE CONSIDERATIONS:\n";
echo "   • Throughput: Tasks processed per second\n";
echo "   • Latency: Task execution delay\n";
echo "   • Scalability: Worker scaling capability\n";
echo "   • Memory: Efficient memory usage\n";
echo "   • Database: Optimized queue queries\n";

echo "\n🔒 SECURITY FEATURES:\n";
echo "   • Access Control: Queue operation permissions\n";
echo "   • Task Validation: Input data validation\n";
echo "   • Rate Limiting: Prevent queue flooding\n";
echo "   • Audit Logging: Security event tracking\n";

// Save results
$reports_dir = __DIR__ . '/../reports';
if (!is_dir($reports_dir)) {
    mkdir($reports_dir, 0755, true);
}

$report_file = $reports_dir . '/queue_processing_test_' . date('Y-m-d_H-i-s') . '.json';
file_put_contents($report_file, json_encode([
    'timestamp' => date('Y-m-d H:i:s'),
    'test_type' => 'queue_processing_integration',
    'status' => count($failed_tests) > 0 ? 'failing' : 'passing',
    'results' => $test_results,
    'execution_time' => $execution_time,
    'workflow_steps' => 8,
    'components_tested' => count($queue_components)
], JSON_PRETTY_PRINT));

echo "\n📄 Integration test results saved to: {$report_file}\n";
echo str_repeat("=", 80) . "\n";