# Code Quality Improvements

## 1. Automated Code Quality Checks

### Add Pre-commit Hooks

```yaml
# .pre-commit-config.yaml
repos:
  - repo: https://github.com/psf/black
    rev: 23.12.1
    hooks:
      - id: black
        language_version: python3.10
  - repo: https://github.com/astral-sh/ruff-pre-commit
    rev: v0.1.6
    hooks:
      - id: ruff
        args: [--fix]
  - repo: https://github.com/pre-commit/mirrors-mypy
    rev: v1.8.0
    hooks:
      - id: mypy
        additional_dependencies: [types-requests]
```

### Add Type Checking

```toml
# pyproject.toml additions
[tool.mypy]
python_version = "3.10"
warn_return_any = true
warn_unused_configs = true
disallow_untyped_defs = true
disallow_incomplete_defs = true
check_untyped_defs = true
disallow_untyped_decorators = true
no_implicit_optional = true
warn_redundant_casts = true
warn_unused_ignores = true
warn_no_return = true
warn_unreachable = true
strict_equality = true
```

## 2. Performance Monitoring

### Add Performance Benchmarks

```python
# tests/performance/test_performance.py
import time
import pytest
from arklex.orchestrator import AgentOrg

class TestPerformance:
    def test_response_time(self):
        start_time = time.time()
        # Test agent response
        end_time = time.time()
        assert (end_time - start_time) < 5.0  # 5 second threshold
    
    def test_memory_usage(self):
        import psutil
        process = psutil.Process()
        initial_memory = process.memory_info().rss
        # Run operations
        final_memory = process.memory_info().rss
        assert (final_memory - initial_memory) < 100 * 1024 * 1024  # 100MB threshold
```

## 3. Error Handling Improvements

### Standardize Exception Handling

```python
# arklex/utils/exceptions.py additions
class ArklexValidationError(ArklexError):
    """Raised when input validation fails."""
    pass

class ArklexTimeoutError(ArklexError):
    """Raised when operations timeout."""
    pass

class ArklexResourceError(ArklexError):
    """Raised when resource operations fail."""
    pass
```

## 4. Logging Enhancements

### Structured Logging

```python
# arklex/utils/logging_utils.py improvements
import structlog

def setup_structured_logging():
    structlog.configure(
        processors=[
            structlog.stdlib.filter_by_level,
            structlog.stdlib.add_logger_name,
            structlog.stdlib.add_log_level,
            structlog.stdlib.PositionalArgumentsFormatter(),
            structlog.processors.TimeStamper(fmt="iso"),
            structlog.processors.StackInfoRenderer(),
            structlog.processors.format_exc_info,
            structlog.processors.UnicodeDecoder(),
            structlog.processors.JSONRenderer()
        ],
        context_class=dict,
        logger_factory=structlog.stdlib.LoggerFactory(),
        wrapper_class=structlog.stdlib.BoundLogger,
        cache_logger_on_first_use=True,
    )
```

## 5. Testing Improvements

### Add Property-Based Testing

```python
# tests/property/test_properties.py
from hypothesis import given, strategies as st
from arklex.utils.graph_state import MessageState

@given(st.text(min_size=1, max_size=1000))
def test_message_state_serialization(message_text):
    state = MessageState(response=message_text)
    serialized = state.model_dump()
    deserialized = MessageState(**serialized)
    assert deserialized.response == message_text
```

### Add Integration Test Coverage

```python
# tests/integration/test_end_to_end.py
class TestEndToEndWorkflows:
    def test_customer_service_workflow(self):
        # Test complete customer service flow
        pass
    
    def test_shopify_integration_workflow(self):
        # Test complete Shopify integration
        pass
```

## 6. Documentation Standards

### API Documentation

```python
# Add OpenAPI documentation
from fastapi import FastAPI
from fastapi.openapi.utils import get_openapi

def custom_openapi():
    if app.openapi_schema:
        return app.openapi_schema
    openapi_schema = get_openapi(
        title="Arklex AI API",
        version="1.0.0",
        description="Agent-First Framework API",
        routes=app.routes,
    )
    app.openapi_schema = openapi_schema
    return app.openapi_schema

app.openapi = custom_openapi
```

## 7. Security Improvements

### Add Security Scanning

```yaml
# .github/workflows/security.yml
name: Security Scan
on: [push, pull_request]
jobs:
  security:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - name: Run Bandit
        run: |
          pip install bandit
          bandit -r arklex/ -f json -o bandit-report.json
      - name: Run Safety
        run: |
          pip install safety
          safety check
```

## 8. Monitoring and Observability

### Add Application Metrics

```python
# arklex/utils/metrics.py
from prometheus_client import Counter, Histogram, Gauge
import time

# Metrics
request_counter = Counter('arklex_requests_total', 'Total requests', ['endpoint'])
request_duration = Histogram('arklex_request_duration_seconds', 'Request duration')
active_connections = Gauge('arklex_active_connections', 'Active connections')

# Decorator for automatic metrics
def track_metrics(func):
    def wrapper(*args, **kwargs):
        start_time = time.time()
        try:
            result = func(*args, **kwargs)
            request_counter.labels(endpoint=func.__name__).inc()
            return result
        finally:
            request_duration.observe(time.time() - start_time)
    return wrapper
```

## 9. Test Coverage Improvements

### Address Missing Test Coverage

```python
# tests/orchestrator/generator/test_ui_components.py
# Replace TODO placeholders with actual tests

class TestTaskEditorUI:
    """Test the TaskEditor UI component with mock interactions."""

    def test_task_editor_initialization(self, sample_tasks: list) -> None:
        """Test task editor initialization."""
        # Extract business logic to service layer
        from arklex.orchestrator.generator.ui.task_manager import TaskManagerService
        
        service = TaskManagerService(sample_tasks)
        assert service.get_tasks() == sample_tasks

    def test_compose_creates_tree_structure(self, sample_tasks: list) -> None:
        """Test that compose method creates proper tree structure."""
        from arklex.orchestrator.generator.ui.tree_builder import TreeStructureBuilder
        
        builder = TreeStructureBuilder()
        tree = builder.build_tree(sample_tasks)
        assert tree is not None
        assert len(tree.children) > 0
```

## 10. Error Handling Improvements

### Comprehensive Error Testing

```python
# tests/error/test_error_scenarios.py
import pytest
from unittest.mock import Mock, patch

class TestErrorScenarios:
    """Test various error scenarios and recovery."""
    
    def test_database_connection_failure(self):
        """Test handling of database connection failures."""
        with patch('arklex.utils.mysql.mysql_pool.get_connection') as mock_conn:
            mock_conn.side_effect = Exception("Connection failed")
            
            # Test that system handles database failures gracefully
            pass
    
    def test_llm_api_failure(self):
        """Test handling of LLM API failures."""
        with patch('langchain_openai.ChatOpenAI.invoke') as mock_invoke:
            mock_invoke.side_effect = Exception("API Error")
            
            # Test that system handles LLM failures gracefully
            pass
    
    def test_malformed_input_handling(self):
        """Test handling of malformed user inputs."""
        # Test with various edge cases
        edge_cases = ["", None, "   ", "a" * 10000]
        
        for input_text in edge_cases:
            # Test that system handles edge cases gracefully
            pass
```
