package com.planet_ink.siplet.support;
import java.util.*;
/*
Copyright 2008-2011 Bo Zimmerman

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
@SuppressWarnings("unchecked")
public class MXPElement implements Cloneable
{
    public static final int BIT_OPEN=1;
    public static final int BIT_COMMAND=2;
    public static final int BIT_NEEDTEXT=4;
    public static final int BIT_SPECIAL=8;
    public static final int BIT_HTML=16;
    public static final int BIT_NOTSUPPORTED=32;
    public static final int BIT_EATTEXT=64;
    public static final int BIT_DISABLED=128;
    
    private String name="";
    private String definition="";
    private String attributes="";
    private String flag="";
    private String unsupportedParms="";
    private int bitmap=0;
    private Vector parsedAttributes=null;
    private Hashtable attributeValues=null;
    private Hashtable alternativeAttributes=null;
    private List<String> userParms=new Vector();
    private boolean basicElement=true;
    
    private int bufInsert=-1;
    
    public MXPElement(String newName,
                      String theDefinition,
                      String theAttributes,
                      String theFlag,
                      int theBitmap)
    {
        super();
        name=newName;
        definition=theDefinition;
        attributes=theAttributes;
        flag=theFlag;
        bitmap=theBitmap;
        if((!isCommand())
        &&(theDefinition.toUpperCase().indexOf("&TEXT;")>=0))
              bitmap=bitmap|BIT_NEEDTEXT;
    }
    
    public MXPElement(String newName,
                      String theDefinition,
                      String theAttributes,
                      String theFlag,
                      int theBitmap,
                      String unsupported)
    {
        super();
        name=newName;
        definition=theDefinition;
        attributes=theAttributes;
        flag=theFlag;
        bitmap=theBitmap;
        if((!isCommand())
        &&(theDefinition.toUpperCase().indexOf("&TEXT;")>=0))
            bitmap=bitmap|BIT_NEEDTEXT;
        unsupportedParms=unsupported;
    }
    public MXPElement copyOf()
    {
        try
        {
            MXPElement E=(MXPElement)this.clone();
            if(E.parsedAttributes!=null) E.parsedAttributes=(Vector)E.parsedAttributes.clone();
            if(E.attributeValues!=null) E.attributeValues=(Hashtable)E.attributeValues.clone();
            if(E.alternativeAttributes!=null) E.alternativeAttributes=(Hashtable)E.alternativeAttributes.clone();
            if(E.userParms!=null) E.userParms= new Vector<String>(E.userParms);
            return E;
        }
        catch(Exception e){}
        return this;
    }

    public String name(){return name;}
    public void setName(String newName){name=newName;}
    public boolean isCommand(){return Util.bset(bitmap,BIT_COMMAND);}
    public boolean isOpen(){return Util.bset(bitmap,BIT_OPEN);}
    public boolean isHTML(){return Util.bset(bitmap,BIT_HTML);}
    public boolean isSpecialProcessor(){return Util.bset(bitmap,BIT_SPECIAL);}
    public boolean isDisabled(){return Util.bset(bitmap,BIT_DISABLED);}
    public boolean isTextEater(){return Util.bset(bitmap,BIT_EATTEXT);}
    public String getDefinition(){return definition;}
    public void setDefinition(String defi){definition=defi;}
    public String getAttributes(){return attributes;}
    public boolean needsText(){return Util.bset(bitmap,BIT_NEEDTEXT);}
    public void setNotBasicElement(){basicElement=false;}
    public boolean isBasicElement(){return basicElement;}
    public boolean isGenerallySupported(){return !Util.bset(bitmap,BIT_NOTSUPPORTED);}
    public void setBitmap(int newBitmap){bitmap=newBitmap;}
    public int getBitmap(){return bitmap;}
    public Vector getUnsupportedParms()
    {
        if((unsupportedParms==null)||(unsupportedParms.trim().length()==0))
            return new Vector();
        return Util.parseSpaces(unsupportedParms,true);
    }
    public void setAttributes(String newAttributes)
    { 
        attributes=newAttributes;
        parsedAttributes=null;
        attributeValues=null;
        alternativeAttributes=null;
    }
    public String getAttributeValue(String tag)
    {
        getParsedAttributes();
        return (String)attributeValues.get(tag.toUpperCase().trim());
    }
    public void setAttributeValue(String tag, String value)
    {
        getParsedAttributes();
        attributeValues.remove(tag);
        if(value!=null)
            attributeValues.put(tag,value);
    }
    
    public synchronized Vector getParsedAttributes()
    {
        if(parsedAttributes!=null) return parsedAttributes;
        parsedAttributes=new Vector();
        attributeValues=new Hashtable();
        alternativeAttributes=new Hashtable();
        StringBuffer buf=new StringBuffer(attributes.trim());
        StringBuffer bit=new StringBuffer("");
        char quotes='\0';
        int i=-1;
        char lastC=' ';
        boolean firstEqual=false;
        while((++i)<buf.length())
        {
            switch(buf.charAt(i))
            {
            case '=':
                if((!firstEqual)&&(bit.length()>0))
                {
                    String tag=bit.toString().toUpperCase().trim();
                    bit=new StringBuffer("");
                    parsedAttributes.addElement(tag);
                    attributeValues.put(tag,bit);
                }
                else
                    bit.append(buf.charAt(i));
                firstEqual=true;
                break;
            case '\n':
            case '\r':
            case ' ':
            case '\t':
                if(quotes=='\0')
                {
                    if((!firstEqual)&&(bit.length()>0))
                        parsedAttributes.addElement(bit.toString().toUpperCase().trim());
                    bit=new StringBuffer("");
                    firstEqual=false;
                }
                else
                    bit.append(buf.charAt(i));
                break;
            case '"':
            case '\'':
                if(lastC=='\\')
                    bit.append(buf.charAt(i));
                else
                if((lastC=='=')
                ||(quotes!='\0')
                ||((quotes=='\0')&&((lastC==' ')||(lastC=='\t'))))
                {
                    if((quotes!='\0')&&(quotes==buf.charAt(i)))
                    {
                        quotes='\0';
                        if((!firstEqual)&&(bit.length()>0))
                            parsedAttributes.addElement(bit.toString().toUpperCase().trim());
                        bit=new StringBuffer("");
                        firstEqual=false;
                    }
                    else
                    {
                        if(quotes!='\0')
                            bit.append(buf.charAt(i));
                        else
                            quotes=buf.charAt(i);
                    }
                }
                else
                    bit.append(buf.charAt(i));
                break;
            default:
                bit.append(buf.charAt(i));
                break;
            }
            lastC=buf.charAt(i);
        }
        if((!firstEqual)&&(bit.length()>0))
            parsedAttributes.addElement(bit.toString().toUpperCase().trim());
        for(int p=parsedAttributes.size()-1;p>=0;p--)
        {
            String PA=(String)parsedAttributes.elementAt(p);
            StringBuffer VAL=(StringBuffer)attributeValues.get(PA);
            if((VAL!=null)&&(parsedAttributes.contains(VAL.toString())))
            {
                parsedAttributes.removeElementAt(p);
                attributeValues.remove(PA);
                alternativeAttributes.put(PA,VAL.toString());
            }
        }
        return parsedAttributes;
    }
    public String getFlag(){return flag;}
    public List<String> getUserParms(){return userParms;}
    public void saveSettings(int insertPoint, Vector theUserParms)
    {
        bufInsert=insertPoint;
        userParms=theUserParms;
    }
    public int getBufInsert(){return bufInsert;}
    public void deleteAttribute(String name)
    {
        getParsedAttributes();
        attributeValues.remove(name.toUpperCase().trim());
    }
    
    public Vector getCloseTags(String desc)
    {
        StringBuffer buf=new StringBuffer(desc);
        Vector tags=new Vector();
        StringBuffer bit=null;
        char quotes='\0';
        int i=-1;
        char lastC=' ';
        while((++i)<buf.length())
        {
            switch(buf.charAt(i))
            {
            case '<':
                if(quotes!='\0')
                    bit=null;
                else
                if(bit!=null)
                {
                    if(MXP.tagDebug){System.out.println("/TAG/CLOSER2S="+Util.toStringList(tags)); System.out.flush();}
                    return tags;
                }
                else
                    bit=new StringBuffer("");
                break;
            case '>':
                if((quotes=='\0')&&(bit!=null)&&(bit.toString().trim().length()>0))
                    tags.add(bit.toString().toUpperCase().trim());
                bit=null;
                break;
            case ' ':
            case '\t':
                if((quotes=='\0')&&(bit!=null)&&(bit.toString().trim().length()>0))
                    tags.add(bit.toString().toUpperCase().trim());
                bit=null;
                break;
            case '"':
            case '\'':
                if(lastC=='\\')
                    bit=null;
                else
                if((quotes!='\0')
                &&(quotes==buf.charAt(i)))
                    quotes='\0';
                else
                if(quotes=='\0')
                    quotes=buf.charAt(i);
                bit=null;
                break;
            default:
                if((bit!=null)&&(Character.isLetterOrDigit(buf.charAt(i))))
                    bit.append(buf.charAt(i));
                else
                    bit=null;
                break;
            }
            lastC=buf.charAt(i);
        }
        if(MXP.tagDebug){System.out.println("/TAG/CLOSERS="+Util.toStringList(tags)); System.out.flush();}
        return tags;
    }
    
    public String getFoldedDefinition(String text)
    {
        Vector aV=getParsedAttributes();
        attributeValues.remove("TEXT");
        attributeValues.put("TEXT",text);
        if((userParms!=null)&&(userParms.size()>0))
        {
            int position=-1;
            String avParm=null;
            String userParm=null;
            for(int u=0;u<userParms.size();u++)
            {
                userParm=userParms.get(u).toUpperCase().trim();
                int xx=userParm.indexOf('=');
                if((xx>0)&&(alternativeAttributes.containsKey(userParm.substring(0,xx).trim())))
                {
                    String newKey=(String)alternativeAttributes.get(userParm.substring(0,xx).trim());
                    String uu=userParms.get(u);
                    xx=uu.indexOf('=');
                    userParms.set(u,newKey+uu.substring(xx));
                    userParm=userParms.get(u).toUpperCase().trim();
                }
                boolean found=false;
                for(int a=0;a<aV.size();a++)
                {
                    avParm=(String)aV.elementAt(a);
                    if((userParm.startsWith(avParm+"="))||(avParm.equals(userParm)))
                    {
                        found=true;
                        if(a>position) position=a;
                        attributeValues.remove(avParm);
                        String val=(avParm.equals(userParm))?"":userParms.get(u).trim().substring(avParm.length()+1);
                        attributeValues.put(avParm,val);
                        break;
                    }
                }
                if((!found)&&(position<(aV.size()-1)))
                {
                    position++;
                    avParm=(String)aV.elementAt(position);
                    attributeValues.remove(avParm);
                    attributeValues.put(avParm,userParms.get(u).trim());
                }
            }
        }
        return definition;
    }
}
