package org.litesoft.GWT.client.view;

import org.litesoft.GWT.client.*;
import org.litesoft.GWT.client.context.*;
import org.litesoft.GWT.client.widgets.*;
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.core.*;
import org.litesoft.security.*;

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

import static org.litesoft.uispecification.FormWidgetCtrl.*;

public class LoginDialogFactory<T extends SecurityUserView<T>> implements LoginDialogViewFactory {
    @Override
    public DialogView createDialog( boolean pCancelable, Command pOnSuccess ) {
        return new LoginDialog<T>( pCancelable, pOnSuccess );
    }

    private static class LoginDialog<T extends SecurityUserView<T>> extends DialogView implements SecurityUserViewNames {
        private FormEngine mFE;

        private SecurityUserViewDataProvider<T> mDataProvider;
        private FormBinder<T> mFormBinder;
        private ButtonBase mSubmitButton;

        private boolean mCancelable;
        private Command mOnSuccess;

        public LoginDialog( boolean pCancelable, Command pOnSuccess ) {
            super( title( "Login" ), Opaqueness.Full );
            mCancelable = pCancelable;
            Objects.assertNotNull( "OnSuccess", mOnSuccess = pOnSuccess );

            ClientContext zContext = ClientContext.get();

            mDataProvider = zContext.get( SecurityUserViewDataProvider.class );
            SecurityUserViewMetaData<T> zUserViewMetaData = zContext.get( SecurityUserViewMetaData.class );

            WidgetCtrlMap zWidgetCtrlMap = new WidgetCtrlMap( VISIBLE_AND_ACTIVE_ENABLED );

            zWidgetCtrlMap.add( EDIT_ONLY.required(), aLogonEmail, aCurrentPassword );

            mFE = new FormEngine( zWidgetCtrlMap, FormEngine.Mode.EditRegular, null ) {
                @Override
                protected void changeOccurredOn( String pName, IFormComponent pComponent, boolean pChanged ) {
                    super.changeOccurredOn( pName, pComponent, pChanged );
                    setDialogErrorMessage( null );
                }

                @Override
                protected void enterPressedOn( String pName, IFormComponent pComponent, KeyboardKeyModifier pModifiers ) {
                    if ( pName.equals( aLogonEmail ) ) {
                        getNamedComponent( aCurrentPassword ).setFocus();
                    } else if ( pName.equals( aCurrentPassword ) && (mSubmitButton != null) && mSubmitButton.isEnabled() ) {
                        submitRequested();
                    } else {
                        super.enterPressedOn( pName, pComponent, pModifiers );
                    }
                }
            };
            mFormBinder = new FormBinder<T>( mFE, zUserViewMetaData );

            mContent.setHorizontalAlignment( HasHorizontalAlignment.ALIGN_CENTER );

            add( createLogonAndCurrentPassword() );
            add( new SizeableSpacer( 5 ).stretchable() );

            mFormBinder.setExistingObject( mDataProvider.createNew(), FormEngine.Mode.EditRegular );
        }

        @Override
        public boolean isCancelable() {
            return mCancelable;
        }

        private Widget createLogonAndCurrentPassword() {
            SizeableHorizontalPanel zPanel = new SizeableHorizontalPanel().stretchableHorizontally();
            zPanel.add( mFormBinder.add( aLogonEmail, 0, LOGON ) );
            zPanel.add( mFormBinder.add( aCurrentPassword, PASSWORD_LENGTH, PASSWORD ) );
            return zPanel;
        }

        @Override
        public Widget getBottomBar() {
            LeftCenterRightHorizontalPanel zActionPanel = new LeftCenterRightHorizontalPanel();
            if ( mCancelable ) {
                zActionPanel.addLeft( createCancelButton() );
            }
            zActionPanel.addRight( mFE.addEditSubmitButton( mSubmitButton = createSubmitButton() ) );
            return zActionPanel;
        }

        @Override
        public void aboutToShow() {
            super.aboutToShow();
            mFE.initialize();
        }

        @Override
        protected void justLoaded() {
            super.justLoaded();
            mFE.setFocus();
        }

        @Override
        protected void submitRequested() {
            mFormBinder.commitForm();
            final T zUserView = mFormBinder.getObject();
            mDataProvider.attemptLogin( zUserView, new SimpleDataProviderCallBack() {
                @Override
                public void error( String pError ) {
                    if ( Strings.isNotNullOrEmpty( pError ) ) {
                        setDialogErrorMessage( pError );
                    } else {
                        Scheduler.get().scheduleDeferred( mOnSuccess );
                        close();
                    }
                }
            } );
        }
    }
}