// This Source Code is in the Public Domain per: http://unlicense.org
package org.litesoft.GWT.client.widgets.nonpublic;

import org.litesoft.GWT.client.widgets.*;
import org.litesoft.commonfoundation.base.*;
import org.litesoft.commonfoundation.typeutils.gregorian.*;
import org.litesoft.core.simpletypes.temporal.*;
import org.litesoft.ui.support.nonpublic.*;

import com.google.gwt.user.client.ui.*;

import java.util.*;

public class CreditsPanel
        extends SizeableSimplePanel {
    public CreditsPanel( CreditsData[] pCreditsData ) {
        super( false );

        setWidget( new HTML( createHTML( pCreditsData ) ) );
        addStyleName( "litesoft-CreditsFixedFont" );
    }

    private String createHTML( CreditsData[] pCreditsData ) {
        if ( Currently.isNullOrEmpty( pCreditsData ) ) {
            return "";
        }

        int longestWhoLength = 2;
        CalendarYMD earliestStartDate = pCreditsData[0].getStartDate();
        CalendarYMD latestEndDate = pCreditsData[0].getEndDate();
        for ( int i = 0; i < pCreditsData.length; i++ ) {
            CreditsData creditsData = pCreditsData[i];
            int whoLength = creditsData.getWho().length();
            CalendarYMD startDate = creditsData.getStartDate();
            CalendarYMD endDate = creditsData.getEndDate();
            while ( whoLength > longestWhoLength ) {
                longestWhoLength += 2;
            }
            if ( !startDate.afterOrEqual( earliestStartDate ) ) {
                earliestStartDate = startDate;
            }
            if ( !endDate.beforeOrEqual( latestEndDate ) ) {
                latestEndDate = endDate;
            }
        }
        longestWhoLength += 3;
        Arrays.sort( pCreditsData );
        HtmlBuilder builder = new HtmlBuilder( "litesoft-CreditsColorized" );

        // Add Header
        for ( int i = longestWhoLength; i > 0; i-- ) {
            builder.addNBSP();
        }
        CreditsData.MonthYear zMY = new CreditsData.MonthYear( earliestStartDate );
        do {
            builder.addNBSP();
            builder.add( zMY.toString() );
        }
        while ( zMY.incMonth().isLessThanOrEqual( latestEndDate ) );
        builder.newLine();

        // Add Seperator
        for ( int i = longestWhoLength; i > 0; i-- ) {
            builder.add( '-' );
        }
        zMY = new CreditsData.MonthYear( earliestStartDate );
        do {
            builder.add( '-' );
            builder.add( '+' );
            builder.add( '-' );
            builder.add( '-' );
            builder.add( '-' );
            builder.add( '-' );
        }
        while ( zMY.incMonth().isLessThanOrEqual( latestEndDate ) );
        builder.add( '-' );
        builder.newLine();

        for ( int i = 0; i < pCreditsData.length; i++ ) {
            CreditsData creditsData = pCreditsData[i];
            builder.add( creditsData.getWho(), longestWhoLength );
            builder.addNBSP();
            zMY = new CreditsData.MonthYear( earliestStartDate );
            do {
                int year = zMY.getYear();
                int month = zMY.getMonth();
                int daysInMonth = Month.daysIn( year, month );
                int lastSplit = (daysInMonth + 18) / 2;
                builder.colorize( creditsData.wasActiveDuring( year, month, 1, 6 ) );
                builder.add( '|' ); //  1
                builder.colorize( creditsData.wasActiveDuring( year, month, 7, 12 ) );
                builder.addNBSP(); //   2
                builder.colorize( creditsData.wasActiveDuring( year, month, 13, 18 ) );
                builder.add( '.' ); //  3
                builder.colorize( creditsData.wasActiveDuring( year, month, 19, lastSplit ) );
                builder.addNBSP(); //   4
                builder.colorize( creditsData.wasActiveDuring( year, month, lastSplit + 1, daysInMonth ) );
                builder.add( '.' ); //  5
                zMY.incMonth();
                builder.colorize( creditsData.wasActiveDuring( zMY.getYear(), zMY.getMonth(), 1, 1 ) );
                builder.addNBSP(); //   6
            }
            while ( zMY.isLessThanOrEqual( latestEndDate ) );
            builder.newLine();
        }
        //To change body of created methods use File | Settings | File Templates.
        return builder.toString();
    }

    private static class HtmlBuilder {
        private StringBuilder mSB = new StringBuilder();
        private boolean mColorize = false;
        private String mColorStyle;
        private int mOffset = 0;

        public HtmlBuilder( String pColorStyle ) {
            mColorStyle = pColorStyle;
        }

        public void colorize( boolean pColorize ) {
            mColorize = pColorize;
        }

        public void newLine() {
            mColorize = false;
            mSB.append( "<br>" );
            mOffset = 0;
        }

        private void LLaddChar( String pChar ) {
            if ( mColorize ) {
                mSB.append( "<span class='" ).append( mColorStyle ).append( "'>" );
                mSB.append( pChar );
                mSB.append( "</span>" );
            } else {
                mSB.append( pChar );
            }
            mOffset++;
        }

        public void addNBSP() {
            LLaddChar( "&nbsp;" );
        }

        public void addSP() {
            if ( mColorize || ((mOffset & 1) == 1) ) {
                addNBSP();
            } else {
                LLaddChar( "." );
            }
        }

        public void add( char pChar ) {
            if ( pChar == ' ' ) {
                addNBSP();
            } else {
                LLaddChar( Character.toString( pChar ) );
            }
        }

        public void add( String pString ) {
            if ( pString != null ) {
                for ( int i = 0; i < pString.length(); i++ ) {
                    add( pString.charAt( i ) );
                }
            }
        }

        public void add( String pString, int pToLength ) {
            if ( pString != null ) {
                for ( int i = 0; i < pString.length(); i++ ) {
                    add( pString.charAt( i ) );
                    pToLength--;
                }
                addNBSP();
                while ( --pToLength > 0 ) {
                    addSP();
                }
            }
        }

        public String toString() {
            return mSB.toString();
        }
    }
}