/**
 * Simulates an expensive object: database connection (time-consuming creation, high resource usage)
 * Implements Prototype interface to support cloning
 * @author chuyang
 * @version 1.0
 */
public class DatabaseConnection implements Prototype<DatabaseConnection> {

	/**
	 * Connection unique identifier
	 */
	private String connectionId;
	/**
	 * Database URL
	 */
	private String databaseUrl;
	/**
	 * Whether the connection is currently in use (pool management status)
	 */
	private boolean isInUse;
	public ConnectionPoolManager m_ConnectionPoolManager;

	public DatabaseConnection(){
		this.connectionId = "";
		this.databaseUrl = "";
		this.isInUse = false;
	}

	@Override
	public void finalize() throws Throwable {
		// Cleanup when connection is closed
		System.out.println("Connection " + connectionId + " is being finalized");
	}
	/**
	 * Constructor: Simulates high-cost creation scenarios (network connections, authentication, etc.)
	 * 
	 * @param connectionId Connection ID
	 * @param databaseUrl Database URL
	 */
	public DatabaseConnection(String connectionId, String databaseUrl){
		// Simulate time-consuming connection creation
		try {
			Thread.sleep(100); // Simulate connection creation delay
		} catch (InterruptedException e) {
			Thread.currentThread().interrupt();
		}
		this.connectionId = connectionId;
		this.databaseUrl = databaseUrl;
		this.isInUse = false;
		System.out.println("Connection " + connectionId + " created to " + databaseUrl);
	}

	/**
	 * Reset connection state: Called when returning to pool, clears temporary data and marks as idle
	 */
	public void reset(){
		// Clear temporary data
		this.isInUse = false;
		System.out.println("Connection " + connectionId + " has been reset");
	}

	/**
	 * Clone method: Used to quickly copy objects (more efficient than new)
	 * @return Cloned object
	 */
	@Override
	public DatabaseConnection clone(){
		try {
			// Create new connection object and copy properties
			DatabaseConnection cloned = (DatabaseConnection) super.clone();
			cloned.connectionId = this.connectionId + "_clone";
			cloned.databaseUrl = this.databaseUrl;
			cloned.isInUse = false;
			System.out.println("Connection " + connectionId + " cloned as " + cloned.connectionId);
			return cloned;
		} catch (CloneNotSupportedException e) {
			throw new RuntimeException("Clone failed", e);
		}
	}
	
	// Getter and Setter methods
	public String getConnectionId() {
		return connectionId;
	}
	
	public void setConnectionId(String connectionId) {
		this.connectionId = connectionId;
	}
	
	public String getDatabaseUrl() {
		return databaseUrl;
	}
	
	public void setDatabaseUrl(String databaseUrl) {
		this.databaseUrl = databaseUrl;
	}
	
	public boolean isInUse() {
		return isInUse;
	}
	
	public void setInUse(boolean inUse) {
		isInUse = inUse;
	}
}