package com.ca.directory.jxplorer;

import com.ca.commons.cbutil.CBSystemProperties;
import com.ca.commons.cbutil.CBUtility;
import com.ca.commons.jndi.JNDIOps;
import com.ca.commons.naming.DXAttribute;
import com.ca.commons.naming.LdifUtility;
import com.ca.commons.security.cert.CertViewer;
import com.ca.directory.BuildNumber;

import javax.swing.*;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.Enumeration;
import java.util.Properties;
import java.util.Vector;
import java.util.logging.*;

/**
 * (c) Chris Betts: Groupmind Project
 */
public class JXConfig
{
    public static Properties myProperties;       // global variables for the browser, read from...
    public static String propertyFile;           // ...a user configurable file storing default properties.
    public static String localDir;               // local directory the browser is being run from...

    /*
     *    Constants that define which security property elements to use.
     */

    public static final String CLIENT_TYPE_PROPERTY = "keystoreType.clientcerts";
    public static final String CA_TYPE_PROPERTY = "keystoreType.cacerts";
    public static final String CLIENT_PATH_PROPERTY = "option.ssl.clientcerts";
    public static final String CA_PATH_PROPERTY = "option.ssl.cacerts";
    public static final String ALLOW_CONNECTION_CERT_IMPORT = "option.ssl.import.cert.during.connection";

    public static final String LANGUAGE_OVERRIDE="force.locale";
    public static final String LANGUAGE_OVERRIDE_DEFAULT="default";

    private static Logger log = Logger.getLogger(JXConfig.class.getName());
    public static String version = BuildNumber.value;
    public static boolean debug = false;
    public static int debugLevel = 0;


    /**
     * Convenience function to access both the System
     * property list, or failing that the internal JXplorer
     * properties list.
     *
     * @param key property key; see the java.util.Properties class.
     */

    public static String getProperty(String key)
    {
        if (System.getProperty(key) != null)
            return System.getProperty(key);

        if (myProperties.containsKey(key))
            return myProperties.getProperty(key);

        return null;
    }

    /**
     * Convenience function to return a positive integer config value.
     * Returns -1 if the value is not available or cannot be parsed

     *
     * @param key  the property key
     * @return the int value of the property, or -1 if missing or an error
     */
    public static int getIntProperty(String key)
    {
        return getIntProperty(key, -1);
    }

    /**
     * Convenience function to return a positive integer config value.
     * Returns -1 if the value is not available or cannot be parsed

     *
     * @param key  the property key
     * @return the int value of the property,
     * @param defaultValue the default value for the property if none is found pre-defined
     */
    public static int getIntProperty(String key, int defaultValue)
    {
        try
        {
            String val = getProperty(key);

            return (val==null)?defaultValue:Integer.parseInt(val);
        }
        catch (Exception e)
        {
            return defaultValue;
        }
    }

    /**
     * Convenience function to access the internal JXplorer properties list.
     *
     * @param key          property key; see the java.util.Properties class.
     * @param defaultValue the default value for the property if none is found pre-defined
     */

    public static String getProperty(String key, String defaultValue)
    {
        if (myProperties == null) return defaultValue;
        return myProperties.getProperty(key, defaultValue);
    }

    /**
     * Sometimes it is more convenient to simply pass the whole properties
     * hash to a subordinate class, rather than using the get...() methods
     */

    public static Properties getMyProperties()
    {
        return myProperties;
    }


    /**
     * sets a property in the dxserver property list.
     */
    public static void setProperty(String key, String value)
    {
        if (key != null)
            myProperties.setProperty(key, value);

    }

    /**
     * sets a property in the dxserver property list.
     */
    public static void setProperty(String key, String value, String comment)
    {
        if (key != null)
            myProperties.setProperty(key, value);

        if (comment != null && comment.length() > 0)
            myProperties.put(key + ".comment", comment);
    }

    /**
     * Sets the default values for properties.  This is overridden if the
     * property appears in the system properties list or config text file.
     * (The system properties list always takes priority.)<p>
     *
     * @param key   the unique key of the property.
     * @param value the actual value to set.
     * @return the final value of the property.
     */

    public static String setDefaultProperty(String key, String value)
    {
        if (System.getProperty(key) != null)
            return System.getProperty(key);

        if (myProperties.containsKey(key))
            return myProperties.getProperty(key);

        myProperties.setProperty(key, value);
        return value;
    }

    /**
     * Sets the default values for properties.  This is overridden if the
     * property appears in the system properties list or config text file.
     * (The system properties list always takes priority.)<p>
     * <p/>
     * Also adds a comment for the property file.
     *
     * @param key     the unique key of the property
     * @param value   the actual value to set
     * @param comment an optional comment
     * @return the final value of the property
     */
    public static String setDefaultProperty(String key, String value, String comment)
    {
        if (comment != null && comment.length() > 0)
            myProperties.put(key + ".comment", comment);

        return setDefaultProperty(key, value);
    }

    /**
     * Reads the initial config file, providing defaults if necessary
     */
    public static void setupProperties()
    {
        setupProperties(null);
    }

    public static String getLocalDirectory()
    {
        return System.getProperty("user.dir") + File.separator;
    }
    

    /**
     * Initialises the myProperties property list, and sets
     * default values for properties not in the config file.
     * <p/>
     * Note that file names use the File.separator character, (which
     * is system dependant) while URLs use '/' always.
     */

    public static String getConfigDirectory()
    {
        return CBUtility.getConfigDirectory(JXplorer.APPLICATION_NAME);
    }

    /**
     * Reads the initial config file, providing defaults if necessary.
     * @param suppliedProperties an initial set of default properties that takes precedence over any read file values or defaults
     */
    public static void setupProperties(Properties suppliedProperties)
    {
        localDir = getLocalDirectory();  // the application local directory, with a bunch of installed resource files

        String configDir = getConfigDirectory(); // the writeable configuration directory

        if (suppliedProperties == null)  // the usual case
        {
            String configFileName = "jxconfig.txt";

            //checks for custom config file location; either passed on the command line or forced on us by security permissions (e.g. Win 7)
            propertyFile = CBUtility.getPropertyConfigPath(JXplorer.APPLICATION_NAME, configFileName);

            myProperties = CBUtility.readPropertyFile(propertyFile);

        }
        else
        {
            myProperties = suppliedProperties;
        }

        // initialise the 'myProperties' variable (also used in setDefaultProperty())

        setDefaultProperty("url.defaultdirectory", "localhost", "default for empty connection screen GUI - rarely used");
        setDefaultProperty("url.defaultdirectory.port", "389", "default for empty connection screen GUI - rarely used");
        setDefaultProperty("url.defaultadmin", "localhost", "default value for a specific 3rd party plug in; rarely used");
        setDefaultProperty("url.defaultadminport", "3389", "default value for a specific 3rd party plug in; rarely used");
        setDefaultProperty("baseAdminDN", "cn=Management System", "default value for a specific 3rd party plug in; rarely used");


        /*
         *    File and URL defaults.  Many of these are the same thing in two forms;
         *    one for accessing the files directly, the other for accessing them
         *    as a URL.
         *
         *    The properties are of the form dir.* or url.*, with dir referring to
         *    a file directory and url referring to the directory as a URL access.
         *
         *    dir.local and url.local is the directory the app is currently running in.
         *    *.htmldocs is the directory with the doco in it; i.e. help etc.
         *    *.templates is the root directory for the html attribute template files.
         *
         *    XXX this is wierd.  Rewrite it all nicer.
         */

        setProperty("dir.comment", "this sets the directories that JXplorer reads its static resources from.");
        setDefaultLocationProperty("dir.local", localDir);
        setDefaultLocationProperty("dir.help", localDir + "help" + File.separator);
        setDefaultLocationProperty("dir.plugins", localDir + "plugins" + File.separator);

        setDefaultProperty("width", "800", "set by client GUI - don't change");

        setDefaultProperty("height", "600", "set by client GUI - don't change");

        setDefaultProperty("baseDN", "c=au", "the default base DN for an empty connection - rarely used");

        setDefaultProperty("ldapversion", "3", "set by client GUI - don't change");

        // java log setup

        setDefaultProperty(".level", "WARNING", "(java loggin variable) - allowable values are 'OFF', 'SEVERE', 'WARNING', 'INFO', 'FINE', 'FINER', 'FINEST' and 'ALL'");

        setDefaultProperty("com.ca.level", "WARNING", " (java loggin variable) partial logging is also available.  Be warned that the Sun logging system is a very buggy partial reimplementation of log4j, and doesn't seem to do inheritance well.");

        setDefaultProperty(LANGUAGE_OVERRIDE, LANGUAGE_OVERRIDE_DEFAULT, "use this to set local language detection ('default') or force the use of a particular language. (e.g. 'en' / 'en.US' / 'de' / 'zh.CN' / 'zh.TW'");

        //setDefaultProperty("logging", "console");
        //setProperty("logging.comment", "allowable log modes: none | console | file | both");
        //setDefaultProperty("log4j.config", "log4j.xml");
        //setProperty("logging.comment", "this is not used for all logging - the logging system is still a bit primative, and in the process of migraing to java logging");

        setDefaultProperty("handlers", "java.util.logging.ConsoleHandler", "(java logging variable) This sets the log level for console reporting");

        setDefaultProperty("java.util.logging.ConsoleHandler.level", "ALL", "(java logging variable) This sets the log level for console reporting");

        setDefaultProperty("java.util.logging.ConsoleHandler.formatter", "java.util.logging.SimpleFormatter", "(java logging variable) This sets the built in formatter to use for console reporting");

        setDefaultProperty("java.util.logging.FileHandler.level", "ALL", "(java loggin variable) This sets the log level for log file reporting");

        setDefaultProperty("java.util.logging.FileHandler.pattern", "JX%u.log", "(java loggin variable) The name of the log file (see java.util.logging.FileHandler java doc)");

        setDefaultProperty("java.util.logging.FileHandler.formatter", "java.util.logging.SimpleFormatter", "(java loggin variable) This sets the built in formatter to use for file reporting");


        //setDefaultProperty("log.debuglevel", "warning", "allowable debug levels; severe, warning (default), info, fine, finer, finest (includes  BER dump) - usually set by client GUI.");

        setDefaultProperty("null.entry.editor", "defaulteditor", "the editor displayed for null entries is pluggable and can be set to a custom java class");

        setDefaultProperty("plugins.ignoreUniqueness", "false", "whether to allow multiple plugins for the same object class: 'true' or 'false");

        setDefaultProperty("option.ignoreSchemaOnSubmission", "false", "Skip client side schema checks; useful if JXplorer is getting confused or the schema is inconsistent");

        setDefaultProperty("option.ldap.timeout", "0", "the maximum time to allow a query to run before cancelling - '0' = 'as long as the server allows'");

        setDefaultProperty("option.ldap.limit", "0", "The maximum number of entries to return - '0' = 'all the server allows'");

        setDefaultProperty("option.ldap.referral", JNDIOps.DEFAULT_REFERRAL_HANDLING, "this is a jdni variable determining how referrals are handled: 'ignore','follow' or 'throw'");   // 'ignore'

        setDefaultProperty("option.ldap.pagedResults", "false", "set this to true to use paged results for large data sets, if your directory supports it (e.g AD)");

        setDefaultProperty("option.ldap.pageSize", "-1", "Sets the page size for paged results, if paged results are used.  (Generally 1000 is a good size)");

        setDefaultProperty("option.ldap.browseAliasBehaviour", JNDIOps.DEFAULT_ALIAS_HANDLING, "jndi variable setting how aliases are handled while browsing: 'always','never','finding','searching'");        // behaviour when browsing tree (= 'finding')

        setDefaultProperty("option.ldap.searchAliasBehaviour", "searching", "jndi variable setting how aliases are handled while searching: 'always','never','finding','searching'");      // behaviour when making search request

        setDefaultProperty("option.confirmTableEditorUpdates", "false", "whether the user is prompted before updates; usually set by GUI");          //TE: set false by default for dxadmin (bug 2848).

        setDefaultProperty("option.url.handling", "JXplorer", "override URL handling to launch JXplorer rather than default browser");                      //TE: set the URL handling to displaying JXplorer rather than launch into default browser.

        setDefaultProperty("option.ldap.sendVerboseBinarySuffix", "false", "some directories require ';binary' to be explicitly appended to binary attribute names: 'true' or 'false' (default)");

        setDefaultProperty("option.ldap.useRFC4523BinarySuffix", "true", "append ';binary' to certificate attributes as per RFC 4453: 'true' (default) or 'false'");

        setDefaultProperty("option.drag.and.drop", "true", "set to 'false' to disable drag and drop in the left hand tree view");

        setDefaultProperty("jxplorer.cache.passwords", "true", "whether JX should keep a (run time only) cache of passwords for reuse and reconnection");

        setDefaultProperty("mask.raw.passwords", "true", "whether to mask userPassword in the entry password editor");

        setDefaultProperty("sort.by.naming.attribute", "false", "if true, this sorts entries in the tree editor by naming attribute first, then by attribute value");

        if ("true".equals(getProperty("option.ldap.sendVerboseBinarySuffix")))
        {
            log.fine("using verbose binary suffix ';binary'");  // Warning: logger may not yet be initialised
            DXAttribute.setVerboseBinary(true);  // default if 'false'
        }

        if ("false".equals(getProperty("option.ldap.useRFC4523BinarySuffix")))
        {
            log.fine("using binary suffix ';binary'");  // Warning: logger may not yet be initialised
            DXAttribute.setRFC4523BinaryHandling(false);  // default is 'true'
        }


        /*
         *    Security defaults
         */

        setDefaultProperty(CA_PATH_PROPERTY, configDir + "security" + File.separator + "cacerts");
        setDefaultProperty(CLIENT_PATH_PROPERTY, configDir + "security" + File.separator + "clientcerts");
        setDefaultProperty(CLIENT_TYPE_PROPERTY, "JKS");
        setDefaultProperty(CA_TYPE_PROPERTY, "JKS");
        setDefaultProperty(ALLOW_CONNECTION_CERT_IMPORT, "true");
        // echo the above back as a system property so that independant trust stores can access it globally.  Ugly? Yes.
        System.setProperty(ALLOW_CONNECTION_CERT_IMPORT, getProperty(ALLOW_CONNECTION_CERT_IMPORT));

//        setDefaultProperty("securityProvider", "sun.security.provider.Sun");
//        set default security provider to match alljssl.jar
        setDefaultProperty("securityProvider", "com.sun.net.ssl.internal.ssl.Provider");
        setProperty("securityProvider.comment", "the security provider can be changed, and three more can be added by creating 'securityProperty0', 'securityProperty1' and 'securityProperty2'.");

        // SECURITY/SSL HANDLER
        setDefaultProperty("ldap.sslsocketfactory", "com.ca.commons.jndi.JndiSocketFactory");
        setProperty("ldap.sslsocketfactory.comment", "This is the built in ssl factory - it can be changed if required.");

        // special hack to allow forcing of TLSv1 as the only allowed SSL protocol...
        setDefaultProperty("option.ssl.protocol", "any", "Force JXplorer to only use one specific SSL protocol, rather than negotiating a normal SSL connection. e.g. just 'TLSv1' or 'SSLv3';  default is 'any'");
        // special special hack to add to system properties, so it can be picked up by seprate com.ca.security.commons.JXSSLSocketFactory
        System.setProperty("option.ssl.protocol", myProperties.getProperty("option.ssl.protocol"));

        setDefaultProperty("gui.lookandfeel", UIManager.getSystemLookAndFeelClassName());    //TE: sets the default look and feel to the system default.
        setDefaultProperty("gui.lookandfeel.comment", "Can set to com.sun.java.swing.plaf.mac.MacLookAndFeel for OSX");    //TE: sets the default look and feel to the system default.

        setDefaultProperty("last.search.filter", "default");    //TE: sets the last filter property to 'default'.

        /*
         *    Check if we need to read system properties.
         */

        setDefaultProperty("getSystemEnvironment.comment", "Set this to true if you wish to add the system environment properties to the JX list (e.g. if you are setting JX properties via system variables)");
        setDefaultProperty("getSystemEnvironment", "false");

        if (getProperty("getSystemEnvironment").equalsIgnoreCase("true"))
        {
            CBSystemProperties.loadSystemProperties();
        }


        // XXX something of a hack - manually set these properties in CertViewer,
        // XXX simply because it is a 'sorta' pluggable editor, that may be called
        // XXX directly without an opportunity to pass them directly.

        CertViewer.setProperties(myProperties);

        //TE: sets up the help link in the cert viewer so that a help button is
        //TE: added to the dialog which links to the appropriate topic in the help.
        CertViewer.setupHelpLink(HelpIDs.SSL_VIEW);


        // optional support for xml in ldif files.
        setDefaultProperty("xml.ldif.rfc", "false");    //option to save XML text in ldif files
        setDefaultProperty("xml.ldif.rfc.comment", "Experimental support for saving XML in LDIF files in editable form (e.g. not base64 encoded)");
        if ("true".equals(getProperty("xml.ldif.rfc")))
            LdifUtility.setSupportXML_LDIF_RFC(true);


        // write out default property file if non exists...

        if (new File(propertyFile).exists() == false)
            writePropertyFile();
}


    /**
     * loads a property representing a file directory (XXX or url), and checks that
     * that it exists.  If either the property doesn't exist, or the actual
     * directory doesn't exist, then the default is used instead...
     */
    protected static void setDefaultLocationProperty(String propName, String defaultLocation)
    {
        setDefaultProperty(propName, defaultLocation);
        String newLocation = getProperty(propName);
        if (!newLocation.equals(defaultLocation))
        {
            File test = new File(newLocation);
            if (!test.exists())
            {
                log.warning("Uunable to find location '" + newLocation + "' -> reverting to '" + defaultLocation + "'");
                setProperty(propName, defaultLocation);
            }
        }
    }

    public static void writePropertyFile()
    {
        CBUtility.writePropertyFile(propertyFile, myProperties, new String("# The property file location defaults to where JXplorer is installed\n" +
                "# - this can be over-ridden with the system property 'jxplorer.config'\n" +
                "#   with a config directory location, or set to user home using the\n" +
                "#   flag 'user.home' (e.g. -Djxplorer.config='user.home' on the command line).\n"));
    }

        /**
     * Initialises the log manager using log configuration set in the properties file
     */
    protected static void setupLogger()
    {
        // loadProperties() should have been called.

        log.info("setting up logger");

        try
        {
            // Sun logging system weird.  Cascading log levels only work if you pre-create exact loggers. whatever.
            Logger.getLogger("com");
            Logger.getLogger("com.ca");
            Logger.getLogger("com.ca.directory");
            Logger.getLogger("com.ca.directory.jxplorer");

            // XXX Have to reinitialise 'log' here, because Sun logging system is too stupid to do the cascading trick
            // XXX unless the 'parent' loggers have been already created. (is this still correct?)
            log = Logger.getLogger(JXplorer.class.getName());

            LogManager logManager = LogManager.getLogManager();
            logManager.reset();

            logManager.readConfiguration(new FileInputStream(JXConfig.propertyFile));
            System.out.println("XXX logging initially level " + CBUtility.getTrueLogLevel(log) + " with " + log.getHandlers().length + " parents=" + log.getUseParentHandlers());

            log.info("Using configuration file: " + JXConfig.propertyFile);
            log.info("logging initialised to global level " + CBUtility.getTrueLogLevel(log));

            // Try to disable swing errors...

            Logger swinglog = Logger.getLogger("javax.swing");
            swinglog.setLevel(Level.SEVERE);

            // DEBUG BLOCK
            /*
            log.severe("ENABLED");
            log.warning("ENABLED");
            log.info("ENABLED");
            log.fine("ENABLED");
            log.finer("ENABLED");
            log.finest("ENABLED");
             */
            if (false) throw new IOException();
        }
        catch (IOException e)
        {
            log.log(Level.SEVERE, "Unable to load log configuration from config file: " + JXConfig.propertyFile, e);
            System.err.println("Unable to load log configuration from config file: " + JXConfig.propertyFile);
            e.printStackTrace();
            setupBackupLogger();
        }

        int currentLogLevel = CBUtility.getTrueLogLevel(log).intValue();

        if (currentLogLevel <= Level.FINE.intValue())
        {
            Vector sortedKeys = new Vector();
            Enumeration baseKeys = myProperties.keys();
            while (baseKeys.hasMoreElements())
            {
                String key = (String) baseKeys.nextElement();
                sortedKeys.addElement(key);
            }
            Collections.sort(sortedKeys);

            Enumeration propNames = sortedKeys.elements();

            StringBuffer propertyData = new StringBuffer();
            String propName;

            while (propNames.hasMoreElements())
            {
                propName = (String) propNames.nextElement();
                propertyData.append("property: ").append(propName).append(" = ").append(myProperties.getProperty(propName)).append("\n");
            }

            log.fine("property:\n" + propertyData.toString());
        }
    }

    /**
     * Failback routine for if we can't find proper log parameters... setup a console logger
     */


    protected static void setupBackupLogger()
    {
        Logger mainLogger = LogManager.getLogManager().getLogger("com.ca");

        // property default value is 'WARNING'
        mainLogger.setLevel(Level.parse(JXConfig.getProperty("java.util.logging.ConsoleHandler.level")));
        Handler handler = new ConsoleHandler();
        handler.setLevel(Level.ALL);
        mainLogger.addHandler(handler);

        //TODO: figure out how to end verbose swing logs...
        Logger swinglog = Logger.getLogger("javax.swing");
        swinglog.setLevel(Level.SEVERE);

    }
}
