package ca.uhn.hl7v2.hoh.encoder;
   
   import java.nio.charset.Charset;
   import java.nio.charset.StandardCharsets;
   import java.util.LinkedHashMap;
   import java.util.Map;
   
   import ca.uhn.hl7v2.hoh.sign.ISigner;
   import ca.uhn.hl7v2.hoh.util.StringUtils;
  import ca.uhn.hl7v2.hoh.util.VersionLogger;
  
  abstract class AbstractHl7OverHttp {
  	public static final String HTTP_HEADER_HL7_SIGNATURE = "HL7-Signature";
  	public static final String HTTP_HEADER_HL7_SIGNATURE_LC = HTTP_HEADER_HL7_SIGNATURE.toLowerCase();
  
  	protected static final Charset ourDefaultCharset;
  
  	static {
  		ourDefaultCharset = StandardCharsets.UTF_8;
  		VersionLogger.init();
  	}
  	
  	private Charset myCharset;
  	private boolean myCharsetExplicitlySet;
  	private byte[] myData;
  	private LinkedHashMap<String, String> myHeaders;
  	private String myMessage;
  	private String myPassword;
  	private ISigner mySigner;
  	private String myPath;
  	private boolean myUsed;
  	private String myUsername;
  
  	/**
  	 * Constructor
  	 */
  	public AbstractHl7OverHttp() {
  		myCharset = ourDefaultCharset;
  	}
  
  	/**
  	 * Returns the charset associated with this message. Will not return <code>null</code>.
  	 */
  	public Charset getCharset() {
  		return myCharset;
  	}
  
  	/**
  	 * @return the data
  	 */
  	public byte[] getData() {
  		return myData;
  	}
  
  	/**
  	 * @return the headers
  	 */
  	public Map<String, String> getHeaders() {
  		return myHeaders;
  	}
  
  	/**
  	 * @return the message
  	 */
  	public String getMessage() {
  		return myMessage;
  	}
  
  
  	/**
  	 * @return the password
  	 */
  	public String getPassword() {
  		return myPassword;
  	}
  
  	/**
  	 * @return the signer
  	 */
  	public ISigner getSigner() {
  		return mySigner;
  	}
  
  	/**
  	 * @return the path
  	 */
  	public String getPath() {
  		// TODO: un-url encode this
  		return myPath;
  	}
  
  	/**
  	 * @return the path
  	 */
  	public String getPathRaw() {
  		return myPath;
  	}
  
  	/**
 	 * @return the username
 	 */
 	public String getUsername() {
 		return myUsername;
 	}
 
 	/**
 	 * @return Returns <code>true</code> if the charset was explicitly set using
 	 *         {@link #setCharset(Charset)}
 	 */
 	public boolean isCharsetExplicitlySet() {
 		return myCharsetExplicitlySet;
 	}
 
 	/**
 	 * @param theCharset
 	 *            The encoding charset to use (default is UTF-8)
 	 * @deprecated The HL7 over HTTP specification now mandates the use of UTF-8. <b>Using this method to set a value other than UTF-8 will lead to a non-conformant application</b> 
 	 */
 	@Deprecated
 	public void setCharset(Charset theCharset) {
 		if (theCharset == null) {
 			throw new NullPointerException("Charset can not be null");
 		}
 		myCharsetExplicitlySet = true;
 		myCharset = theCharset;
 	}
 
 	/**
 	 * @param theData
 	 *            the data to set
 	 */
 	protected void setData(byte[] theData) {
 		myData = theData;
 	}
 
 	/**
 	 * @param theHeaders
 	 *            the headers to set
 	 */
 	public void setHeaders(LinkedHashMap<String, String> theHeaders) {
 		myHeaders = theHeaders;
 	}
 
 	/**
 	 * @param theMessage
 	 *            The raw message text
 	 */
 	public void setMessage(String theMessage) {
 		myMessage = theMessage;
 	}
 
 	/**
 	 * @param thePassword
 	 *            The authorization password
 	 */
 	public void setPassword(String thePassword) {
 		myPassword = thePassword;
 	}
 
 	/**
 	 * Optionally may be used to provide a signer implementation which signs HL7
 	 * content.
 	 * 
 	 * @see ISigner
 	 */
 	public void setSigner(ISigner theSigner) {
 		mySigner = theSigner;
 	}
 
 	/**
 	 * @param thePath
 	 *            the path to set
 	 */
 	public void setPath(String thePath) {
 		myPath = thePath;
 	}
 
 	/**
 	 * @param theUsername
 	 *            The authorization username
 	 */
 	public void setUsername(String theUsername) {
 		if (StringUtils.isNotBlank(theUsername)) {
 			if (theUsername.contains(":")) {
 				throw new IllegalArgumentException("Username contains illegal characters");
 			}
 		}
 		myUsername = theUsername;
 	}
 
 	/**
 	 * Throws an {@link IllegalStateException} if called more than once 
 	 */
 	protected void verifyNotUsed() {
 		if (myUsed) {
 			throw new IllegalStateException(getClass().getSimpleName() + " may not be reused");
 		}
 		myUsed = true;
 	}
 
 	/**
 	 * @return Returns the ISO-8859-1 charset
 	 */
 	public static Charset getDefaultCharset() {
 		return ourDefaultCharset;
 	}
 
 }