abstracts

Create a simple but versatile Employee Management System using Python, leveraging the 'abstracts' package to define clear interfaces and abstract classes for different roles within a company. This system will allow you to manage employees efficiently by categorizing them into different departments such as HR, IT, and Sales. Each department will have its own set of responsibilities and attributes specific to their roles.

### Project Overview:
- **System**: Employee Management System
- **Features**:
  - Define abstract base classes for Employees and Departments.
  - Implement concrete classes for different types of employees like Full-Time, Part-Time, and Contractors.
  - Create department-specific employee roles such as HR Manager, IT Support, and Sales Representative.
  - Allow adding new employees to the system with their details and assigning them to appropriate departments.
  - Provide functionalities to update employee information, including promotions or changes in role.
  - Implement a feature to generate reports on employee statistics within each department.
- **Technologies**:
  - Python
  - Abstracts Package for defining interfaces and abstract classes
  - SQLite for storing employee data

### Steps to Build the Application:
1. **Setup the Environment**
   - Install Python and SQLite.
   - Set up a virtual environment and install the required packages including 'abstracts'.
2. **Design the System Architecture**
   - Define an abstract base class `Employee` with common attributes like ID, name, and department.
   - Create an abstract method `get_details()` in the `Employee` class which must be implemented by all subclasses.
3. **Implement Concrete Classes**
   - For each type of employee (Full-Time, Part-Time, Contractor), create a subclass that inherits from `Employee` and implements the `get_details()` method.
4. **Departmental Roles**
   - Define an abstract base class `Department` with methods like `add_employee()`, `remove_employee()`, and `generate_report()`.
   - Implement concrete classes for different departments (HR, IT, Sales) inheriting from `Department`.
5. **Database Integration**
   - Use SQLite to store employee data.
   - Implement functions to interact with the database for CRUD operations.
6. **User Interface**
   - Develop a simple command-line interface for adding, updating, and retrieving employee data.
7. **Testing**
   - Write unit tests for your classes and functions to ensure they work as expected.
8. **Documentation**
   - Document your code and provide instructions for running the application.

By following these steps, you'll create a robust and scalable Employee Management System that showcases the power of abstract classes and interfaces in Python.