/*
MujMail - Simple mail client for J2ME
Copyright (C) 2003 Petr Spatka <petr.spatka@centrum.cz>
Copyright (C) 2005 Pavel Machek <pavel@ucw.cz>
Copyright (C) 2006 Nguyen Son Tung <n.sontung@gmail.com>
Copyright (C) 2006 Martin Stefan <martin.stefan@centrum.cz>
Copyright (C) 2008 David Hauzar <david.hauzar.mujmail@gmail.com>
 
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

package mujmail;


import java.util.Enumeration;
import java.util.Hashtable;
import java.util.Vector;

import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.ChoiceGroup;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.Image;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.lcdui.Alert;

import mujmail.account.AccountSettings;
import mujmail.account.MailAccount;
//#ifdef MUJMAIL_SYNC
import mujmail.account.MailAccountPrimary;
//#endif
import mujmail.protocols.SMTP;
import mujmail.threading.Algorithm;
import mujmail.util.Functions;
//#ifdef MUJMAIL_SEARCH
import mujmail.search.SearchBox;
//#endif
//#ifdef MUJMAIL_SYNC
import mujmail.account.Sync;
//#endif
//#ifdef MUJMAIL_USR_FOLDERS
import mujmail.mailboxes.BoxList;
//#endif
//#ifdef MUJMAIL_DEBUG_CONSOLE
import mujmail.debug.DebugConsole;
//#endif

public class MujMail extends MIDlet implements CommandListener {

    /** Flag signals if we want to print debug prints */
    private static final boolean DEBUG = false;

    public static final String VERSION = "v1.08.08";
    public static final int BUILD = 20090402;

    public static Properties props;

    //private Lang language = new Lang();
    private MyDisplay myDisplay = new MyDisplay(this);
    public MyAlert alert = new MyAlert(this);
    private Settings settings = new Settings(this);
    private final AccountSettings accountSettings = new AccountSettings(this);
    private AddressBook addressBook = new AddressBook(this);
    final OutBox outBox;
    final PersistentBox sentBox;
    //#ifdef MUJMAIL_SEARCH
    final private SearchBox searchBox;
    //#endif
    private final InBox inBox;
    final OutBox draft;
    private final Trash trash;
    //#ifdef MUJMAIL_SYNC
    private final Sync sync;
    //#endif
    public MailForm mailForm = new MailForm(this);
    public SendMail sendMail = new SendMail(this);
    About about = new About(this);
    //private Debug debug = null;
    private Hashtable/*<String, MailAccountPrimar>*/ mailAccounts;
    ClearDBSelect clearDBSelect;
    private Menu menu = null;
    private boolean initialised = false;
    //#ifdef MUJMAIL_USR_FOLDERS
    private BoxList userMailBoxes;
    //#endif

    Displayable lastDisplay; //last screen displayed before the application goes minimized, paused..
    
    private MailDBSeen mailDBSeen;
    private MailDBManager mailDBManager; 
    
    public static MujMail mujmail; //to get pointer to mujmail easier from anywhere

    /**
     * Represents the Display object. Provides more functionality than
     * javax.microedition.lcdui.Display.
     *
     * @see javax.microedition.lcdui.Display
     *
     */
    public static class MyDisplay {
        private final Display display;
        private boolean settingCurrEnabled = true;

        /**
         * Creates new instance of MyDisplay.
         * @param middlet the midlet that display object will be created.
         */
        public MyDisplay(MIDlet middlet) {
            display = Display.getDisplay(middlet);
        }

        /**
         * Disables setting current screen. This means that calling
         * {@link #setCurrent} will have no effect.
         */
        public void disableSettingCurrent() {
            settingCurrEnabled = false;
        }

        /**
         * Enables setting current screen. This means that calling
         * {@link #setCurrent} will set new screen as current.
         */
        public void enableSettingCurrent() {
            settingCurrEnabled = true;
        }

        /**
         * Sets nextDisplayable as current screen.
         *
         * @param nextDisplayable Displayable object that will be setted as
         *  current screen.
         * @see javax.microedition.lcdui.Display
         */
        public void setCurrent(Displayable nextDisplayable) {
            if (settingCurrEnabled) {
                display.setCurrent(nextDisplayable);
            }
        }

        /**
         * Sets alert as current screen.
         *
         * @param alert the alert to be setted as current screen.
         * @param nextDisplayable the Displayable object that will be setted
         *  as current screen after alert.
         * @see javax.microedition.lcdui.Display
         */
        public void setCurrent(Alert alert, Displayable nextDisplayable) {
            if (settingCurrEnabled) display.setCurrent(alert, nextDisplayable);
        }

        /**
         * Gets current screen.
         * @return gets current screen.
         * @see javax.microedition.lcdui.Display
         */
        public Displayable getCurrent() {
            return display.getCurrent();
        }
        
    }

    public MujMail() {
        if (DEBUG) { DebugConsole.printlnPersistent("MujMail() - start"); }
        mujmail = this;
        
        mailDBManager = new MailDBManager(); // Have to be created before any PersistentBox
        mailDBSeen = new MailDBSeen(this);

        outBox = new OutBox("OUTBOX", this, Lang.get(Lang.TB_OUTBOX));
        sentBox = new PersistentBox("SENTBOX", this, Lang.get(Lang.TB_SENTBOX));
        //#ifdef MUJMAIL_SEARCH
        searchBox = new SearchBox(this);
        //#endif
        inBox = new InBox("INBOX", Lang.get(Lang.TB_INBOX));
        draft = new OutBox("DRAFT", this, Lang.get(Lang.TB_DRAFT));
        trash = new Trash("TRASH", this, Lang.get(Lang.TB_TRASH));
        
        //#ifdef MUJMAIL_USR_FOLDERS
        userMailBoxes = new BoxList(this);
        //#endif

        //#ifdef MUJMAIL_SYNC
        sync = new Sync(this, new MailAccountPrimary(MailAccount.IMAP,
                "login@mujmail.org",
                true,
                Settings.mujMailSrvAddr,
                Short.parseShort(Settings.mujMailSrvPort),
                Settings.mujMailSrvLogin,
                Settings.mujMailSrvPasswd,
                false,
                (byte)0,
                false,
                false,
                "",
                ""));
        //#endif
        
        mailAccounts = new Hashtable();
        menu = new Menu(this);
        clearDBSelect = new ClearDBSelect(this);
        if (DEBUG) { DebugConsole.printlnPersistent("MujMail() - end"); };
    }

    public void pauseApp() {
        lastDisplay = myDisplay.getCurrent();
    }

    public void destroyApp(boolean unconditional) {
        initialised = false;
        getInBox().clearLastSafeMail();
        discServers(true);
        notifyDestroyed();
    }

    public void startApp() {
        if (DEBUG) { DebugConsole.printlnPersistent("MujMail.startApp - start"); };
        if (!Settings.password.equals("")) {
            EnterInitialPasswordForm initialPassword = new EnterInitialPasswordForm();
            getDisplay().setCurrent(initialPassword);
        } else {
            myStartApplication();
        }
        if (DEBUG) { DebugConsole.printlnPersistent("MujMail.startApp - end"); };
    }

    /**
     * The form for entering the password before starting the application.
     * If the password is correct, starts the application.
     * Allows user to clear all databases and than start the application without
     * entering password.
     */
    private class EnterInitialPasswordForm extends Form implements CommandListener {
        private TextField passwordText;
        private Command okCommand = new Command("OK", Command.OK, 0);
        private Command cancelCommand = new Command("Exit", Command.EXIT, 1);
        private Command clearAllDBCommand = new Command("Clear all databases", Command.ITEM, 2);

        public EnterInitialPasswordForm() {
            super("Enter password");

            StringItem description = new StringItem("", "To start the application, enter the password or clear all databases with mails and settings.");
            passwordText = new TextField("Password", "", 50, TextField.PASSWORD);

            append(description);
            append(passwordText);
            addCommand(okCommand);
            addCommand(cancelCommand);
            addCommand(clearAllDBCommand);
            setCommandListener(this);
        }

        public void commandAction(Command c, Displayable d) {
            if (c == cancelCommand) {
                destroyApp(true);
                return;
            }

            if (c == okCommand) {
                if (!Settings.password.equals(passwordText.getString())) {
                    return;
                }
            }

            if (c == clearAllDBCommand) {
                ClearDBSelect clearDB = new ClearDBSelect(mujmail);
                clearDB.clearDataBases(true, true);
            }

            mainMenu();
            // start the application
            myStartApplication();
        }

        

    }

    private void myStartApplication() {
        if (DEBUG) { DebugConsole.printlnPersistent("MujMail.myStartApplication - start"); };

        try {
        boolean showAccountForm = false;
        if (!initialised) {
            //first run, initiation needed
            initialised = true;
            showAccountForm = getAccountSettings().getNumAccounts() > 0 ? false : true;

            getSettings().initSortMode();

            //#ifdef MUJMAIL_USR_FOLDERS