# Dependency Fix Summary

## Issues Fixed

### 1. ✅ AttributeError: module 'utils' has no attribute 'setup_logging'

**Problem:** The application was crashing on startup with:
```
AttributeError: module 'utils' has no attribute 'setup_logging'
```

**Root Cause:** 
- Python was importing the `utils/` package directory instead of finding the `setup_logging()` function
- The `utils/__init__.py` file was empty and didn't expose the required functions

**Solution:**
Updated `/workspace/utils/__init__.py` to:
- Import `setup_logger` from `utils/logger.py`
- Create a `setup_logging()` wrapper function for backward compatibility
- Dynamically import all utility functions from the standalone `utils.py` file
- Properly export all functions via `__all__`

### 2. ✅ Plotly Dependency Management

**Problem:** 
- No graceful handling when plotly is not installed
- Charts would crash the application

**Solution:**
Updated `/workspace/app.py` to:
- Check if plotly is available on import
- Set `PLOTLY_AVAILABLE` flag
- Create dummy plotly objects if not available
- Modified `generate_chart()` to show helpful error message when plotly is missing
- Log dependency status on startup

### 3. ✅ Transformers Dependency Management

**Problem:**
- Inconsistent handling of missing transformers library
- Warning message but no clear status

**Solution:**
- Enhanced logging to show transformers availability status
- Already had proper handling in `ai_models.py` with `TRANSFORMERS_AVAILABLE` flag
- Added status logging in `app.py` to show all dependency statuses at startup

### 4. ✅ Requirements Files Updated

**Updated `/workspace/requirements.txt`:**
- Added pandas
- Added comments about optional dependencies
- Clear separation between core and optional packages

**Updated `/workspace/requirements_gradio.txt`:**
- Marked plotly as REQUIRED for chart features
- Added transformers, torch, and sentencepiece for AI features
- Clear comments explaining which dependencies are optional

## Dependency Status

### Required Dependencies (Core API)
- ✓ fastapi
- ✓ uvicorn
- ✓ pydantic
- ✓ sqlalchemy
- ✓ httpx
- ✓ websockets
- ✓ requests
- ✓ aiohttp
- ✓ pandas

### Required Dependencies (Gradio Dashboard)
- gradio (CRITICAL - app exits if not installed)
- plotly (REQUIRED for charts - graceful degradation if missing)

### Optional Dependencies (AI Features)
- transformers (AI sentiment analysis - gracefully disabled if missing)
- torch (required by transformers)
- sentencepiece (required by some models)

## Installation Instructions

### Install Core API Dependencies
```bash
pip install -r requirements.txt
```

### Install Gradio Dashboard Dependencies
```bash
pip install -r requirements_gradio.txt
```

### Install AI/ML Dependencies (Optional)
```bash
pip install transformers torch sentencepiece
```

### Quick Install (All Features)
```bash
pip install -r requirements.txt
pip install -r requirements_gradio.txt
```

## Testing

Run the dependency test script:
```bash
python3 test_dependencies.py
```

This will check:
- ✓ utils.setup_logging() functionality
- ✓ All utility helper functions
- ✓ Availability of gradio, plotly, transformers
- ✓ AI models module
- ✓ app.py syntax validation

## Startup Behavior

### Before Fix
```
Traceback (most recent call last):
  File "/app/app.py", line 27, in <module>
    logger = utils.setup_logging()
AttributeError: module 'utils' has no attribute 'setup_logging'
```

### After Fix
```
{"timestamp": "2025-11-16T15:47:32.594534Z", "level": "INFO", "logger": "crypto_aggregator", ...}
{"timestamp": "...", "level": "INFO", "message": "Dependency Status:"}
{"timestamp": "...", "level": "INFO", "message": "  - Gradio: ✓ Available"}
{"timestamp": "...", "level": "INFO", "message": "  - Plotly: ✓ Available"}
{"timestamp": "...", "level": "INFO", "message": "  - Transformers: ✗ Missing (AI features disabled)"}
```

### Graceful Degradation
- **No Gradio:** Application exits with clear error message
- **No Plotly:** Charts show helpful message, dashboard continues to work
- **No Transformers:** AI features disabled, rest of app works normally

## Files Modified

1. `/workspace/utils/__init__.py` - Added setup_logging() and utility function exports
2. `/workspace/app.py` - Added dependency checking and graceful handling
3. `/workspace/requirements.txt` - Added pandas and documentation
4. `/workspace/requirements_gradio.txt` - Added transformers and AI dependencies

## Files Created

1. `/workspace/test_dependencies.py` - Comprehensive dependency testing script
2. `/workspace/DEPENDENCY_FIX_SUMMARY.md` - This documentation

## Verification

All fixes have been tested and verified:
- ✓ `utils.setup_logging()` works correctly
- ✓ All utility functions accessible (format_number, calculate_rsi, etc.)
- ✓ App handles missing dependencies gracefully
- ✓ Requirements files updated with all dependencies
- ✓ Clear installation instructions provided
- ✓ Test script created for future validation

## Next Steps

To run the application with all features:

1. Install dependencies:
   ```bash
   pip install -r requirements_gradio.txt
   ```

2. Run the application:
   ```bash
   python3 app.py
   ```

The application will now start successfully and show clear status messages about which features are available based on installed dependencies.