#!/usr/bin/env python3
"""
Test script for backup_script.py functionality
"""

import os
import sys
import logging
from unittest.mock import Mock, patch, MagicMock
from backup_script import PVCBackupManager

# Configure logging
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)

def test_pvc_verification():
    """Test PVC verification functionality"""
    print("=== Testing PVC Verification ===")
    
    with patch('backup_script.client.CoreV1Api') as mock_core_api:
        # Mock successful PVC check
        mock_api_instance = Mock()
        mock_core_api.return_value = mock_api_instance
        mock_api_instance.read_namespaced_persistent_volume_claim.return_value = Mock()
        
        backup_manager = PVCBackupManager()
        result = backup_manager.verify_pvc_exists("test-pvc")
        print(f"PVC verification result: {result}")
        assert result == True

def test_snapshot_name_generation():
    """Test snapshot name generation"""
    print("=== Testing Snapshot Name Generation ===")
    
    backup_manager = PVCBackupManager()
    timestamp = backup_manager.get_pst_date()
    snapshot_name = backup_manager.generate_snapshot_name("test-pvc", timestamp)
    print(f"Generated snapshot name: {snapshot_name}")
    assert "test-pvc-snapshot-" in snapshot_name

def test_snapshot_yaml_creation():
    """Test snapshot YAML creation"""
    print("=== Testing Snapshot YAML Creation ===")
    
    backup_manager = PVCBackupManager()
    snapshot_yaml = backup_manager.create_snapshot_yaml("test-pvc", "test-snapshot")
    print(f"Snapshot YAML: {snapshot_yaml}")
    
    assert snapshot_yaml["apiVersion"] == "snapshot.storage.k8s.io/v1"
    assert snapshot_yaml["kind"] == "VolumeSnapshot"
    assert snapshot_yaml["metadata"]["name"] == "test-snapshot"
    assert snapshot_yaml["spec"]["source"]["persistentVolumeClaimName"] == "test-pvc"

def test_full_backup_process():
    """Test full backup process with mocked APIs"""
    print("=== Testing Full Backup Process ===")
    
    with patch('backup_script.client.CustomObjectsApi') as mock_snapshot_api, \
         patch('backup_script.client.CoreV1Api') as mock_core_api:
        
        # Mock API instances
        mock_snapshot_instance = Mock()
        mock_core_instance = Mock()
        mock_snapshot_api.return_value = mock_snapshot_instance
        mock_core_api.return_value = mock_core_instance
        
        # Mock PVC verification
        mock_core_instance.read_namespaced_persistent_volume_claim.return_value = Mock()
        
        # Mock snapshot creation
        mock_snapshot_instance.create_namespaced_custom_object.return_value = {
            "metadata": {"name": "test-snapshot"}
        }
        
        # Mock snapshot ready status
        mock_snapshot_instance.get_namespaced_custom_object.return_value = {
            "status": {"readyToUse": True}
        }
        
        backup_manager = PVCBackupManager()
        # Override PVCs for testing
        backup_manager.pvcs_to_backup = ["test-pvc"]
        backup_manager.timeout = 10  # Short timeout for testing
        
        result = backup_manager.run_backup()
        print(f"Backup process result: {result}")
        assert result == True

def test_environment_variables():
    """Test environment variable configuration"""
    print("=== Testing Environment Variables ===")
    
    # Set test environment variables
    os.environ["BACKUP_NAMESPACE"] = "test-namespace"
    os.environ["SNAPSHOT_CLASS"] = "test-snapshot-class"
    os.environ["TIMEOUT"] = "600"
    
    backup_manager = PVCBackupManager()
    print(f"Namespace: {backup_manager.namespace}")
    print(f"Snapshot Class: {backup_manager.snapshot_class}")
    print(f"Timeout: {backup_manager.timeout}")
    
    assert backup_manager.namespace == "test-namespace"
    assert backup_manager.snapshot_class == "test-snapshot-class"
    assert backup_manager.timeout == 600

def run_integration_test():
    """Run integration test with real cluster (optional)"""
    print("=== Integration Test (Real Cluster) ===")
    print("This test requires access to a real Kubernetes cluster")
    print("Make sure you have kubeconfig configured")
    
    try:
        backup_manager = PVCBackupManager()
        print("Successfully initialized backup manager")
        
        # Test with a small timeout to avoid long waits
        backup_manager.timeout = 30
        print("Ready to run backup (will timeout after 30 seconds)")
        
        # Uncomment the following line to run actual backup
        # result = backup_manager.run_backup()
        # print(f"Integration test result: {result}")
        
    except Exception as e:
        print(f"Integration test failed: {e}")

def main():
    """Run all tests"""
    print("Starting backup script tests...")
    
    try:
        test_pvc_verification()
        test_snapshot_name_generation()
        test_snapshot_yaml_creation()
        test_full_backup_process()
        test_environment_variables()
        
        print("\n=== All Unit Tests Passed ===")
        
        # Ask user if they want to run integration test
        response = input("\nDo you want to run integration test with real cluster? (y/N): ")
        if response.lower() == 'y':
            run_integration_test()
            
    except Exception as e:
        print(f"Test failed: {e}")
        sys.exit(1)

if __name__ == "__main__":
    main()