feat: Add comprehensive logging for file operations in openai_service.py

.gitignore

@@ -50,6 +50,9 @@ coverage.xml
 # Django stuff:
 *.log
 
+# Application logs
+logs/
+
 # Sphinx documentation
 docs/_build/
 

README.md

@@ -203,6 +203,68 @@ class TestNewFeature(unittest.TestCase):
         pass
 ```
 
+## Logging
+
+The application includes comprehensive logging to improve debugging capabilities and operational visibility. Logs are written to both console and rotating log files.
+
+### Log Files Location
+- **Directory:** `logs/`
+- **Main log file:** `logs/app.log`
+- **Rotation:** Files rotate at 10MB with up to 5 backup files
+
+### Log Levels
+- **DEBUG:** Detailed diagnostic information (file operations, API calls, data flow)
+- **INFO:** General informational messages (successful operations, state changes)
+- **WARNING:** Warning messages for recoverable issues (fallbacks, empty files)
+- **ERROR:** Error messages for failures that don't stop execution
+- **CRITICAL:** Critical failures requiring immediate attention
+
+### Configuring Log Levels
+Set the `LOG_LEVEL` environment variable to control logging verbosity:
+
+```bash
+export LOG_LEVEL=DEBUG  # For detailed debugging
+export LOG_LEVEL=INFO   # For normal operation
+export LOG_LEVEL=WARNING  # For production with minimal logs
+```
+
+### Interpreting Common Log Messages
+
+#### File Operations (generate_meet_link)
+- `"Attempting to read meet_links.txt"` - Starting file read operation
+- `"Retrieved Meet link from file: {link}"` - Successfully read link from file
+- `"meet_links.txt not found. Falling back to API."` - File missing, using API fallback
+- `"meet_links.txt is empty. Falling back to API."` - File exists but no links available
+
+#### API Operations
+- `"Starting event details extraction from message"` - Beginning OpenAI API call for event parsing
+- `"Successfully extracted event details: {details}"` - Event parsing completed
+- `"Starting Google Calendar event scheduling"` - Beginning calendar API call
+- `"Successfully scheduled event: {title}"` - Calendar event created
+
+#### Error Scenarios
+- `"OpenAI API error while extracting event details: {error}"` - OpenAI API failure
+- `"Google Calendar API HTTP error: {status} - {content}"` - Calendar API error
+- `"Error uploading file {path}: {error}"` - File upload failure
+
+### Security Considerations
+- Sensitive data (API keys, tokens, personal information) is never logged
+- Meet link URLs in logs are sanitized if they contain query parameters
+- Log files are excluded from version control via `.gitignore`
+
+### Enabling Debug Logging
+For troubleshooting issues, enable DEBUG logging:
+
+1. Set environment variable: `export LOG_LEVEL=DEBUG`
+2. Restart the application
+3. Check `logs/app.log` for detailed diagnostic information
+
+### Log Rotation
+Logs automatically rotate when they reach 10MB to prevent disk space issues. The rotation creates backup files:
+- `app.log.1` (most recent backup)
+- `app.log.2` (older backup)
+- Up to `app.log.5` (oldest backup)
+
 ## Contributing
 
 Contributions are welcome! Please fork the repository and submit a pull request with your improvements.

app/config.py

@@ -2,6 +2,7 @@
 import os
 from dotenv import load_dotenv
 import logging
+from .logging_config import setup_logging
 
 
 def load_configurations(app):
@@ -18,8 +19,5 @@ def load_configurations(app):
 
 
 def configure_logging():
-    logging.basicConfig(
-        level=logging.INFO,
-        format="%(asctime)s - %(name)s - %(levelname)s - %(message)s",
-        stream=sys.stdout,
-    )
+    """Configure logging using the centralized logging configuration."""
+    setup_logging()

app/logging_config.py

@@ -0,0 +1,66 @@
+import logging.config
+import os
+
+LOGGING_CONFIG = {
+    'version': 1,
+    'disable_existing_loggers': False,
+    'formatters': {
+        'standard': {
+            'format': '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
+        },
+        'detailed': {
+            'format': '%(asctime)s - %(name)s - %(levelname)s - %(funcName)s:%(lineno)d - %(message)s'
+        },
+    },
+    'handlers': {
+        'console': {
+            'class': 'logging.StreamHandler',
+            'level': 'INFO',
+            'formatter': 'standard',
+            'stream': 'ext://sys.stdout',
+        },
+        'file': {
+            'class': 'logging.handlers.RotatingFileHandler',
+            'level': 'DEBUG',
+            'formatter': 'detailed',
+            'filename': 'logs/app.log',
+            'maxBytes': 10485760,  # 10MB
+            'backupCount': 5,
+        },
+    },
+    'loggers': {
+        'app.services.openai_service': {
+            'level': 'DEBUG',
+            'handlers': ['console', 'file'],
+            'propagate': False,
+        },
+        'app': {
+            'level': 'INFO',
+            'handlers': ['console', 'file'],
+            'propagate': False,
+        },
+    },
+    'root': {
+        'level': 'INFO',
+        'handlers': ['console', 'file'],
+    },
+}
+
+def setup_logging():
+    """Setup logging configuration."""
+    # Create logs directory if it doesn't exist
+    os.makedirs('logs', exist_ok=True)
+
+    # Apply logging configuration
+    logging.config.dictConfig(LOGGING_CONFIG)
+
+    # Set log level from environment variable if provided
+    log_level = os.getenv('LOG_LEVEL', 'INFO').upper()
+    try:
+        numeric_level = getattr(logging, log_level)
+        logging.getLogger().setLevel(numeric_level)
+        logging.getLogger('app').setLevel(numeric_level)
+        logging.getLogger('app.services.openai_service').setLevel(logging.DEBUG)
+    except AttributeError:
+        logging.warning(f"Invalid LOG_LEVEL '{log_level}', using INFO")
+        logging.getLogger().setLevel(logging.INFO)