# Troubleshooting Guide

Common issues and solutions when using the TrustCafé API wrapper.

## Table of Contents

- [Authentication Issues](#authentication-issues)
- [Connection Issues](#connection-issues)
- [Token Management Issues](#token-management-issues)
- [API Call Issues](#api-call-issues)
- [Environment Issues](#environment-issues)
- [Data Handling Issues](#data-handling-issues)
- [Performance Issues](#performance-issues)
- [Debugging Strategies](#debugging-strategies)

## Authentication Issues

### Issue: "Invalid client credentials"

**Symptoms:**
```
ValueError: Client credentials invalid
```

**Causes:**
- Incorrect client_id or client_secret
- Using alpha credentials on production environment (or vice versa)
- Credentials haven't been saved yet from the TrustCafé admin panel

**Solutions:**

1. Verify credentials from the admin panel
2. Ensure environment matches credentials:
   ```python
   # Check your credentials are for the right environment
   print(f"Environment: {env}")  # Should match where credentials were created
   ```

3. Generate new credentials if needed:
   - Visit: https://www.trustcafe.io/en/myaccount/apiaccess
   - Click "Create new client credentials key pair"
   - Save the new credentials

4. Verify credentials aren't expired (trustcafe-side expiration)

---

### Issue: "Token expired"

**Symptoms:**
```
Exception: Token has expired
```

**Causes:**
- Access token duration has expired (~3 months from creation)
- Time mismatch between systems

**Solutions:**

1. Automatically refresh token:
   ```python
   # Check token validity and refresh if needed
   if not API.is_token_valid():
       API.handle_token()
   ```

2. Pre-load tokens before long operations:
   ```python
   # Ensure token is fresh before making many requests
   API.handle_token()

   # Now all API calls will succeed
   ```

3. Provide longer expiration time for testing:
   ```python
   # Manual token with long expiration
   API.set_token({
       "access_token": "your-token",
       "access_token_timeout": 9999999999  # Far future date
   })
   ```

---

### Issue: "Permission denied" when making requests

**Symptoms:**
```
ForbiddenError: Insufficient permissions for this API endpoint
```

**Causes:**
- Client credentials lack required scopes
- Not authenticated (no access token)

**Solutions:**

1. Verify scopes on the admin panel
2. Ensure authentication is enabled in all requests:
   ```python
   # Make sure to authenticate
   response = API.make_request(
       "GET",
       "content",
       "some/path",
       authenticate=True  # Ensure this is True
   )

   # For guest requests (if allowed)
   response = API.make_request(
       "GET",
       "content",
       "some/path",
       authenticate=False
   )
   ```

---

## Connection Issues

### Issue: "No internet connection" or "Connection refused"

**Symptoms:**
```
ConnectionError: An error occurred while making the request
```

**Causes:**
- Network connectivity issues
- Firewall blocking requests
- API service unavailable

**Solutions:**

1. Check network connectivity:
   ```bash
   # Test connectivity to alpha/production endpoints
   ping alpha.wts2.net
   ping trustcafe.io
   ```

2. Verify firewall rules allow HTTPS requests

3. Try alternative network (mobile hotspot vs. Wi-Fi)

4. Check if TrustCafé services are up:
   - Production: https://trustcafe.io
   - Alpha: https://alpha.wts2.net

5. Add retry logic:
   ```python
   import time

   def retry_request(request_func, max_retries=3):
       for attempt in range(max_retries):
           try:
               return request_func()
           except ConnectionError as e:
               if attempt < max_retries - 1:
                   time.sleep(1)
               else:
                   raise
   ```

---

### Issue: "DNS resolution failed"

**Symptoms:**
```
requests.exceptions.ConnectionError: DNS resolution failed
```

**Causes:**
- DNS server issues
- VPN interfering with DNS
- Incorrect hostname

**Solutions:**

1. Check DNS:
   ```bash
   nslookup alpha.wts2.net
   nslookup trustcafe.io
   ```

2. Try changing DNS server:
   ```bash
   # Use Google DNS (8.8.8.8, 8.8.4.4)
   # Or Cloudflare (1.1.1.1, 1.0.0.1)
   ```

3. Disable VPN temporarily
4. Check configuration for correct hostnames (alpha.wts2.net vs trustcafe.io)

---

## Token Management Issues

### Issue: "Token file not found"

**Symptoms:**
```
FileNotFoundError: Token data file 'token_data_alpha.json' not found
```

**Causes:**
- First-time run
- Token directory not created
- Wrong path specified

**Solutions:**

1. API `<environment>_handle_token` automatically creates file on first use

2. Ensure working directory is writable

3. Specify custom token file path:
   ```python
   API.handle_token(token_data_path="my/custom/path/token_data.json")
   ```

4. Manually create token file:
   ```python
   token_data = API.sign_in()
   with open("token_data_alpha.json", "w") as f:
       json.dump(token_data, f)
   ```

---

### Issue: "Permission denied: cannot write token file"

**Symptoms:**
```
PermissionError: [Errno 13] Permission denied: 'token_data_alpha.json'
```

**Causes:**
- Working directory not writable
- File locked by another process
- Insufficient permissions

**Solutions:**

1. Ensure writable directory:
   ```python
   import os

   # Use a writable directory
   writable_dir = os.path.expanduser("~")  # Home directory
   API.handle_token(token_data_path=f"{writable_dir}/tokens/token_data.json")
   ```

2. Check file permissions:
   ```bash
   ls -la token_data_alpha.json
   chmod 644 token_data_alpha.json
   ```

3. Try with a custom directory:
   ```python
   import tempfile

   # Use temp directory
   with tempfile.TemporaryDirectory() as tmpdir:
       API.handle_token(token_data_path=f"{tmpdir}/token_data.json")
   ```

---

### Issue: "Token file corrupted"

**Symptoms:**
```
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)
```

**Causes:**
- File corruption during write
- File truncated by other process

**Solutions:**

1. Delete corrupted token file:
   ```bash
   rm token_data_alpha.json
   ```

2. Let wrapper recreate it

3. Check for concurrent token writes:
   ```python
   from threading import Lock

   token_lock = Lock()

   def safe_handle_token():
       with token_lock:
           API.handle_token()
   ```

---

## API Call Issues

### Issue: "400 Bad Request" or "Invalid parameter"

**Symptoms:**
```
ValueError: Invalid parameter or data format
400 Bad Request
```

**Causes:**
- Missing required parameters
- Incorrect parameter format
- Parameter validation failure

**Solutions:**

1. Check parameter requirements in API Reference:
   - See [API Reference](api_reference.md) for each job

2. Verify parameter types:
   ```python
   # Use correct types
   API.run_job('post.create', {
       "postText": "text string",  # Should be string
       "blurLabel": None,          # None is okay
       # Wrong: "blurLabel": ""  (empty string)
   })
   ```

3. Verify required parameters:
   ```python
   # Example for post.create
   required_fields = ['postText', 'parent']

   if 'parent' not in data:
       raise ValueError("Required field 'parent' is missing")
   ```

4. Use debug mode to see request:
   ```python
   API = APIClient(debug=True)

   # Now you'll see the exact data being sent
   API.run_job('post.create', data)
   ```

---

### Issue: "404 Not Found"

**Symptoms:**
```
FileNotFoundError: Endpoint not found
404 Not Found
```

**Causes:**
- Wrong endpoint or path
- Resource doesn't exist
- Branch/post not found

**Solutions:**

1. Verify the path is correct
2. Check if resource exists:
   ```python
   # Verify branch exists
   branch = API.run_job('branch.get', "branch-name")

   if not branch:
       print("Branch does not exist")

   # Verify post exists
   post = API.run_job('post.get', "post-id")

   if not post:
       print("Post does not exist")
   ```

3. Check for spelling mistakes in paths

4. Use debug mode to see exact path being sent:
   ```python
   API = APIClient(debug=True)
   API.run_job('post.create', data)  # See exact request path
   ```

---

### Issue: "500 Internal Server Error"

**Symptoms:**
```
ConnectionError: An error occurred
500 Internal Server Error
```

**Causes:**
- TrustCafé server error
- Database issues on server side
- Unhandled edge case

**Solutions:**

1. Wait a moment and retry
2. Check TrustCafé status
3. Try at a different time
4. Consider this transient error:
   ```python
   import time

   def retry_server_error(func, max_retries=3):
       for attempt in range(max_retries):
           try:
               return func()
           except ConnectionError as e:
               if str(e).find("500") != -1:
                   if attempt < max_retries - 1:
                       time.sleep(2 ** attempt)  # Exponential backoff
               else:
                   raise
   ```

---

### Issue: "Rate limit exceeded"

**Symptoms:**
```
429 Too Many Requests
```

**Causes:**
- Too many API calls too quickly
- Gratuitous API usage

**Solutions:**

1. Implement rate limiting (see main README for example)

2. Space out your API calls:
   ```python
   import time

   def spaced_request(request_func, delay=1):
       result = request_func()
       if hasattr(request_func, 'call_count'):
           request_func.call_count += 1
           if request_func.call_count > 30:
               time.sleep(2)
       return result
   ```

3. Use pagination for large result sets

4. Consider caching results when possible

---

## Environment Issues

### Issue: "Environment 'invalid' is not valid"

**Symptoms:**
```
ValueError: Environment 'staging' is not valid. Must be one of: ['alpha', 'production']
```

**Causes:**
- Typo in environment name
- Passing only environment once
- Environment changed incorrectly

**Solutions:**

1. Use correct environment names:
   - "alpha" (development/staging)
   - "production" (live)

2. Avoid modifying environment mid-session after API init

3. Reinitialize if you need to switch:
   ```python
   # Create new API client for new environment
   API_prod = APIClient(
       client_id="prod-id",
       client_secret="prod-secret",
       env="production"
   )

   # Old API still has old environment
   print(API.environment)  # "alpha"
   ```

---

### Issue: "Endpoint 'invalid' is not defined"

**Symptoms:**
```
ValueError: Endpoint 'noservices' is not defined in the API client.
```

**Causes:**
- Typo in endpoint name
- Custom endpoint not configured
- Server-side endpoint changed

**Solutions:**

1. Check available endpoints in APIClient code
2. Use correct endpoints: "content", "auth", "audrey", etc.
3. Review documentation for correct API structure

---

## Data Handling Issues

### Issue: "JSON decode error" or "Response is not valid JSON"

**Symptoms:**
```
ValueError: Response is not valid JSON: Expecting value: line 1 column 1 (char 0)
```

**Causes:**
- Server returning non-JSON response
- Network error causing incomplete response
- Empty response

**Solutions:**

1. Add error handling:
   ```python
   try:
       response = API.make_request("GET", "content", "path")
       response_json = response.json()
   except json.JSONDecodeError as e:
       print(f"Failed to parse JSON: {e}")
       print(f"Response was: {response}")
   ```

2. Check if server is responding correctly

3. Verify network connectivity

4. Check for errors in response:
   ```python
   if 'error' in response:
       raise Exception(f"API Error: {response['error']}")
   ```

---

### Issue: Empty response or missing data

**Symptoms:**
```
expected to find Items in response, but didn't
```

**Causes:**
- Query returns no results
- Pagination not handled
- Response structure misunderstanding

**Solutions:**

1. Check for empty results:
   ```python
   response = API.make_request("GET", "content", "some/path")

   if 'Items' not in response or not response.get('Items'):
       print("No results found")
   ```

2. Check pagination status:
   ```python
   if 'LastEvaluatedKey' in response:
       print("More results available, need pagination")
   ```

3. Verify response structure understanding

---

## Performance Issues

### Issue: "Timeout" errors

**Symptoms:**
```
requests.exceptions.Timeout: Request timed out
```

**Causes:**
- Network slowness
- Large result sets
- Slow server response

**Solutions:**

1. Increase timeout:
   ```python
   # Unfortunately, current implementation doesn't expose timeout
   # This would need updating in apiclient.py

   # If you control code, you can modify the make_request method
   # to accept a timeout parameter
   ```

2. Reduce request complexity

3. Implement pagination for large datasets

4. Use async if available

---

### Issue: Slow token refresh

**Symptoms:**
- Initial request slow
- Token refresh takes too long

**Causes:**
- Network latency to auth endpoint
- Server-side delays

**Solutions:**

1. Pre-load token:
   ```python
   # Get token before doing anything time-sensitive
   API.handle_token()

   # All subsequent calls will use cached token
   ```

2. Use manual token for frequent operations:
   ```python
   API.set_token({
       "access_token": token,
       "access_token_timeout": 9999999999
   })
   ```

---

## Debugging Strategies

### Enable Debug Mode

```python
API = APIClient(
    client_id="your-id",
    client_secret="your-secret",
    env="alpha",
    debug=True  # Enables verbose logging
)
```

This will print:
- Request method
- Full URL
- Headers
- Request payload

### Add Logging

```python
import logging

logging.basicConfig(level=logging.DEBUG)

logger = logging.getLogger(__name__)

try:
    result = API.run_job('post.create', data)
    logger.debug(f"Success: {result}")
except Exception as e:
    logger.error(f"Failed: {e}", exc_info=True)
```

### Verify Request Flow

```python
def trace_request(func, *args, **kwargs):
    """Trace each request"""
    import inspect

    # Get function name
    func_name = inspect.getmember(BuiltinFunctionType, func).__name__

    print(f"Calling: {func_name}")
    print(f"Args: {args}")
    print(f"Kwargs: {kwargs}")

    result = func(*args, **kwargs)

    print(f"Result: {result}")
    return result
```

### Network Inspection

```python
import requests

# Direct inspection of requests
import logging
requests_log = logging.getLogger("urllib3")
requests_log.setLevel(logging.DEBUG)

requests_log.propagate = True
```

---

## Getting Help

If you've tried all of the above and still have issues:

1. **Check the Code**: Review the latest version on GitLab
   - [GitLab Repository](https://gitlab.com/trustcafe/trustcafe-api-wrapper)

2. **Check TrustCafé Status**: Verify services are up
   - [Production](https://trustcafe.io)
   - [Alpha](https://alpha.wts2.net)

3. **Review Contributions**: Check for known issues
   - Open an issue on GitLab
   - Check if a fix is already in progress

4. **Contact Support**: For resolved but unreleased issues
   - WikiTribune team
   - Build Product Slack/Discord

---

## Quick Reference

Common error codes:

- **400 Bad Request**: Invalid parameters (check API Reference)
- **401 Unauthorized**: Invalid/missing token (call `handle_token()`)
- **403 Forbidden**: Insufficient permissions (check scopes)
- **404 Not Found**: Wrong path or resource doesn't exist
- **429 Too Many Requests**: Rate limit exceeded (apply rate limiting)
- **500 Internal Server Error**: Service error (wait and retry)
- **Timeout**: Network issues (check connectivity)

---

**Remember**: Most issues are easily solved with proper error handling, verification of credentials, and rate limiting.