package eu.siacs.conversations.entities;

import java.security.interfaces.DSAPublicKey;

import net.java.otr4j.crypto.OtrCryptoEngineImpl;
import net.java.otr4j.crypto.OtrCryptoException;

import org.json.JSONException;
import org.json.JSONObject;

import eu.siacs.conversations.crypto.OtrEngine;
import eu.siacs.conversations.xmpp.XmppConnection;
import android.content.ContentValues;
import android.content.Context;
import android.database.Cursor;

public class Account  extends AbstractEntity{

	private static final long serialVersionUID = 6174825093869578035L;
	
	public static final String TABLENAME = "accounts";
	
	public static final String USERNAME = "username";
	public static final String SERVER = "server";
	public static final String PASSWORD = "password";
	public static final String OPTIONS = "options";
	public static final String ROSTERVERSION = "rosterversion";
	public static final String KEYS = "keys";
	
	public static final int OPTION_USETLS = 0;
	public static final int OPTION_DISABLED = 1;
	public static final int OPTION_REGISTER = 2;
	public static final int OPTION_USECOMPRESSION = 3;
	
	public static final int STATUS_CONNECTING = 0;
	public static final int STATUS_DISABLED = -2;
	public static final int STATUS_OFFLINE = -1;
	public static final int STATUS_ONLINE = 1;
	public static final int STATUS_NO_INTERNET = 2;
	public static final int STATUS_UNAUTHORIZED = 3;
	public static final int STATUS_TLS_ERROR = 4;
	public static final int STATUS_SERVER_NOT_FOUND = 5;

	public static final int STATUS_SERVER_REQUIRES_TLS = 6;

	public static final int STATUS_REGISTRATION_FAILED = 7;
	public static final int STATUS_REGISTRATION_CONFLICT = 8;
	public static final int STATUS_REGISTRATION_SUCCESSFULL = 9;
	public static final int STATUS_REGISTRATION_NOT_SUPPORTED = 10;
	
	protected String username;
	protected String server;
	protected String password;
	protected int options = 0;
	protected String rosterVersion;
	protected String resource = "mobile";
	protected int status = -1;
	protected JSONObject keys = new JSONObject();
	
	protected boolean online = false;
	
	transient OtrEngine otrEngine = null;
	transient XmppConnection xmppConnection = null;
	transient protected Presences presences = new Presences();

	private String otrFingerprint;
	
	public Account() {
		this.uuid = "0";
	}
	
	public Account(String username, String server, String password) {
		this(java.util.UUID.randomUUID().toString(),username,server,password,0,null,"");
	}
	public Account(String uuid, String username, String server,String password, int options, String rosterVersion, String keys) {
		this.uuid = uuid;
		this.username = username;
		this.server = server;
		this.password = password;
		this.options = options;
		this.rosterVersion = rosterVersion;
		try {
			this.keys = new JSONObject(keys);
		} catch (JSONException e) {
			
		}
	}
	
	public boolean isOptionSet(int option) {
		return ((options & (1 << option)) != 0);
	}
	
	public void setOption(int option, boolean value) {
		if (value) {
			this.options |= 1 << option;
		} else {
			this.options &= ~(1 << option);
		}
	}
	
	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getServer() {
		return server;
	}

	public void setServer(String server) {
		this.server = server;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}
	
	public void setStatus(int status) {
		this.status = status;
	}
	
	public int getStatus() {
		if (isOptionSet(OPTION_DISABLED)) {
			return STATUS_DISABLED;
		} else {
			return this.status;
		}
	}
	
	public boolean hasErrorStatus() {
		return getStatus() > STATUS_NO_INTERNET && (getXmppConnection().getAttempt() >= 2);
	}
	
	public void setResource(String resource) {
		this.resource = resource;
	}
	
	public String getResource() {
		return this.resource;
	}
	
	public String getJid() {
		return username+"@"+server;
	}
	
	public JSONObject getKeys() {
		return keys;
	}
	
	public String getSSLFingerprint() {
		if (keys.has("ssl_cert")) {
			try {
				return keys.getString("ssl_cert");
			} catch (JSONException e) {
				return null;
			}
		} else {
			return null;
		}
	}
	
	public void setSSLCertFingerprint(String fingerprint) {
		this.setKey("ssl_cert", fingerprint);
	}
	
	public boolean setKey(String keyName, String keyValue) {
		try {
			this.keys.put(keyName, keyValue);
			return true;
		} catch (JSONException e) {
			return false;
		}
	}

	@Override
	public ContentValues getContentValues() {
		ContentValues values = new ContentValues();
		values.put(UUID,uuid);
		values.put(USERNAME, username);
		values.put(SERVER, server);
		values.put(PASSWORD, password);
		values.put(OPTIONS,options);
		values.put(KEYS,this.keys.toString());
		values.put(ROSTERVERSION,rosterVersion);
		return values;
	}
	
	public static Account fromCursor(Cursor cursor) {
		return new Account(cursor.getString(cursor.getColumnIndex(UUID)),
				cursor.getString(cursor.getColumnIndex(USERNAME)),
				cursor.getString(cursor.getColumnIndex(SERVER)),
				cursor.getString(cursor.getColumnIndex(PASSWORD)),
				cursor.getInt(cursor.getColumnIndex(OPTIONS)),
				cursor.getString(cursor.getColumnIndex(ROSTERVERSION)),
				cursor.getString(cursor.getColumnIndex(KEYS))
				);
	}

	
	public OtrEngine getOtrEngine(Context context) {
		if (otrEngine==null) {
			otrEngine = new OtrEngine(context,this);
		}
		return this.otrEngine;
	}

	public XmppConnection getXmppConnection() {
		return this.xmppConnection;
	}

	public void setXmppConnection(XmppConnection connection) {
		this.xmppConnection = connection;
	}

	public String getFullJid() {
		return this.getJid()+"/"+this.resource;
	}
	
	public String getOtrFingerprint() {
		if (this.otrFingerprint == null) {
			try {
				DSAPublicKey pubkey = (DSAPublicKey) this.otrEngine.getPublicKey();
				if (pubkey == null) {
					return null;
				}
				StringBuilder builder = new StringBuilder(new OtrCryptoEngineImpl().getFingerprint(pubkey));
				builder.insert(8, " ");
				builder.insert(17, " ");
				builder.insert(26, " ");
				builder.insert(35, " ");
				this.otrFingerprint = builder.toString();
			} catch (OtrCryptoException e) {
				
			}
		}
		return this.otrFingerprint;
	}

	public String getRosterVersion() {
		if (this.rosterVersion==null) {
			return "";
		} else {
			return this.rosterVersion;
		}
	}
	
	public void setRosterVersion(String version) {
		this.rosterVersion = version;
	}

	public String getOtrFingerprint(Context applicationContext) {
		this.getOtrEngine(applicationContext);
		return this.getOtrFingerprint();
	}
	
	public void updatePresence(String resource, int status) {
		this.presences.updatePresence(resource, status);
	}

	public void removePresence(String resource) {
		this.presences.removePresence(resource);
	}
	
	public void clearPresences() {
		this.presences = new Presences();
	}

	public int countPresences() {
		return this.presences.size();
	}

	public String getPgpSignature() {
		if (keys.has("pgp_signature")) {
			try {
				return keys.getString("pgp_signature");
			} catch (JSONException e) {
				return null;
			}
		} else {
			return null;
		}
	}
}