package org.litesoft.datt.client.ui.views.stories;

import org.litesoft.GWT.client.*;
import org.litesoft.GWT.client.view.*;
import org.litesoft.GWT.client.widgets.*;
import org.litesoft.GWT.client.widgets.Button;
import org.litesoft.GWT.forms.client.*;
import org.litesoft.GWT.forms.client.components.*;
import org.litesoft.bo.views.*;
import org.litesoft.commonfoundation.typeutils.*;
import org.litesoft.datt.client.*;
import org.litesoft.datt.client.boviews.*;
import org.litesoft.datt.client.support.*;
import org.litesoft.datt.client.ui.widgets.*;
import org.litesoft.uispecification.*;

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

public class MergeStoriesStepThree extends ScreenView implements ClickHandler,
                                                                 TwoViewObjectInfoHelperScreenView {
    private StoryViewDataProvider mDataProvider = StoryViewDataProvider.getInstance();

    private UriFragmentIdParams mEncodedURLs = null;

    private Helper mFromHelper = new Helper( this, ViewDefs.STORY_MERGE_STORIES );
    private Helper mIntoHelper = new Helper( this, ViewDefs.STORY_MERGE_STORIES_STEP_TWO );

    private ButtonBase mMergeButton;

    @Override
    public UriFragmentIdParams createRefreshParams() {
        return mEncodedURLs;
    }

    public MergeStoriesStepThree( String pSection, ViewDef pViewDef, TwoStoryURLs pTwoStoryURLs ) {
        super( title( pSection, pViewDef ) );

        if ( pTwoStoryURLs != null ) {
            mEncodedURLs = MergeStoriesStepThreeFactory.encodeParams( pTwoStoryURLs );
            mFromHelper.initialize( pTwoStoryURLs.getStory0(), mIntoHelper );
            mIntoHelper.initialize( pTwoStoryURLs.getStory1(), mFromHelper );
        }

        addStandardTitleBar();

        addLeft( BackButton.factory( "Change From" ).add( mFromHelper.createShowScreenCommand() ).create() );

        addLeft( BackButton.factory( "Change Into" ).add( mIntoHelper.createShowScreenCommand() ).create() );

        add( createSectionTitle( "Story to merge From" ) );

        add( mFromHelper.createInfoPanel() );

        add( createSectionTitle( "Story to merge Into" ) );

        add( mIntoHelper.createInfoPanel() );

        add( new SizeableSpacer().stretchable() );
    }

    @Override
    public void aboutToShow() {
        super.aboutToShow();
        if ( mFromHelper.requestViewObject() ) {
            mIntoHelper.requestViewObject();
        }
    }

    @Override
    public Widget getBottomBar() {
        RightHorizontalPanel zActionPanel = new RightHorizontalPanel();
        zActionPanel.add( mMergeButton = Button.named( "Merge" ).green().text().add( this ).disabled().create() );
        return zActionPanel;
    }

    @Override
    public void formsReady() {
        String zNoMatch = "No match";
        for ( String zName : mFromHelper.getNamedComponentNames() ) {
            IFormComponent z0Component = mFromHelper.getNamedComponent( zName );
            IFormComponent z1Component = mIntoHelper.getNamedComponent( zName );
            if ( (z0Component != null) && (z1Component != null) ) {
                if ( !Objects.areNonArraysEqual( z0Component.getCurrentValue(), //
                                                 z1Component.getCurrentValue() ) ) {
                    z0Component.setError( zNoMatch );
                    z1Component.setError( zNoMatch );
                }
            }
        }
        mMergeButton.setEnabled( true );
    }

    @Override
    public void onClick( ClickEvent event ) // Merge Button
    {
        StoryView zMergeFromStoryView = mFromHelper.getFormBinder().getObject();
        StoryView zMergeIntoSiteStoryView = mIntoHelper.getFormBinder().getObject();

        mDataProvider.mergeStory( zMergeFromStoryView, zMergeIntoSiteStoryView, new SimpleDataProviderCallBack() {
            @Override
            public void error( String pError ) {
                if ( Strings.isNotNullOrEmpty( pError ) ) {
                    // Server Failure
                    AlertManager.alert( this.getClass().getName(), "Merge Story", pError );
                } else {
                    // Server Success
                    backToHome( "Story's Merged" );
                }
            }
        } );
    }

    private static class Helper extends TwoViewObjectInfoHelper<StoryView> implements StoryFindable {
        public Helper( MergeStoriesStepThree pScreenView, ViewDef pViewDef ) {
            super( pScreenView, pViewDef );
        }

        @Override
        protected FormBinder<StoryView> createFormBinder( FormEngine pFE ) {
            return new FormBinder<StoryView>( pFE, StoryViewMetaData.getInstance() );
        }

        @Override
        public Widget createInfoPanel() {
            return new StoryInfoPanel( getFormBinder() );
        }

        @Override
        public boolean requestViewObject() {
            return StoryScreenViewHelper.requestRequiredStory( this, getViewObjectURL(), null );
        }

        @Override
        public void foundStory( StoryView pStoryView, Integer pRequestID ) {
            setExistingObject( pStoryView, FormEngine.Mode.ViewRegular );
        }
    }
}