Troubleshooting Guide
=====================

This guide provides solutions to common issues encountered when working with the LUStores System.

Installation Issues
-------------------

Database Connection Problems
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**: Cannot connect to database during installation

**Solutions**:

1. Verify database server is running
2. Check connection credentials in configuration
3. Ensure database user has proper permissions
4. Test network connectivity to database server

**Problem**: Database initialization fails

**Solutions**:

1. Check database user permissions
2. Verify schema.sql file exists and is readable
3. Review database logs for specific errors
4. Ensure database version compatibility

Node.js and Dependencies
~~~~~~~~~~~~~~~~~~~~~~~~

**Problem**: npm install fails with permission errors

**Solutions**:

1. Use node version manager (nvm) instead of system Node.js
2. Configure npm to use different directory for global packages
3. Run with appropriate user permissions
4. Clear npm cache: ``npm cache clean --force``

**Problem**: Module not found errors

**Solutions**:

1. Delete node_modules and package-lock.json, then reinstall
2. Check for version conflicts in package.json
3. Ensure all dependencies are properly listed
4. Update Node.js to supported version

Runtime Issues
--------------

Server Startup Problems
~~~~~~~~~~~~~~~~~~~~~~~

**Problem**: Server fails to start

**Solutions**:

1. Check port availability (default: 3000)
2. Verify environment variables are set
3. Review server logs for specific errors
4. Ensure all required services are running

**Problem**: Authentication failures

**Solutions**:

1. Verify SSO configuration settings
2. Check network connectivity to authentication provider
3. Review authentication logs
4. Validate certificates and keys

Performance Issues
~~~~~~~~~~~~~~~~~~

**Problem**: Slow response times

**Solutions**:

1. Check database query performance
2. Review server resource usage (CPU, memory)
3. Optimize database indexes
4. Consider connection pooling configuration

**Problem**: High memory usage

**Solutions**:

1. Monitor memory leaks in application code
2. Adjust Node.js memory limits
3. Review database connection pooling
4. Implement proper cleanup of resources

Testing Issues
--------------

Test Failures
~~~~~~~~~~~~~

**Problem**: Tests failing during CI/CD

**Solutions**:

1. Ensure test database is properly initialized
2. Check test environment configuration
3. Review test dependencies and versions
4. Verify test data setup and cleanup

**Problem**: Coverage reports not generated

**Solutions**:

1. Check Jest configuration for coverage settings
2. Ensure all test files are included in coverage
3. Verify output directory permissions
4. Review test script configuration

Development Issues
------------------

Build Problems
~~~~~~~~~~~~~~

**Problem**: TypeScript compilation errors

**Solutions**:

1. Update TypeScript configuration (tsconfig.json)
2. Check for type definition conflicts
3. Ensure all dependencies have proper types
4. Review import/export statements

**Problem**: Client build failures

**Solutions**:

1. Check Vite configuration
2. Verify all client dependencies are installed
3. Review component import paths
4. Ensure environment variables are available

Getting Help
------------

When seeking help, please provide:

1. **System Information**:
   - Operating system and version
   - Node.js version
   - Database version
   - Browser version (for client issues)

2. **Error Details**:
   - Complete error messages
   - Relevant log entries
   - Steps to reproduce the issue
   - Expected vs actual behavior

3. **Environment Details**:
   - Development, staging, or production
   - Configuration settings (without sensitive data)
   - Recent changes or updates

4. **Testing Information**:
   - Test results and coverage reports
   - System management API status
   - Performance metrics

Contact Support
---------------

For additional assistance:

- Review the main documentation
- Check the testing guide for system status
- Use the System Management API for diagnostics
- Contact the development team with detailed information

.. note::
   The System Management API provides comprehensive system status and testing capabilities that can help diagnose many issues automatically.