package com.temp.client.foundation.widget.input.fieldsupport;

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

public class InputFieldAccessor<T> implements HasEnabled {
    protected final Widget inputWidget;
    protected final InputWidgetValueAdapter<T> valueAdapter;
    protected final InputWidgetValidator<T> validator;
    protected final InputWidgetChangeFilter<T> input;
    protected final Focusable[] focusables;

    public InputFieldAccessor( InputWidgetChangeFilter<T> input, InputWidgetValidator<T> validator, InputWidgetValueAdapter<T> valueAdapter, Widget inputWidget,
                               Focusable... focusables ) {
        this.input = input;
        this.validator = validator;
        this.valueAdapter = valueAdapter;
        this.inputWidget = inputWidget;
        this.focusables = (focusables != null) ? focusables : new Focusable[0];
    }

    @Override
    public boolean isEnabled() {
        return getEnableable().isEnabled();
    }

    @Override
    public void setEnabled( boolean enabled ) {
        getEnableable().setEnabled( enabled );
    }

    public Widget getInputWidget() {
        return inputWidget;
    }

    public InputWidgetValueAdapter<T> getValueAdapter() {
        return valueAdapter;
    }

    public InputWidgetValidator<T> getValidator() {
        return validator;
    }

    public InputWidgetChangeFilter<T> getInput() {
        return input;
    }

    public Focusable[] getFocusables() {
        return focusables;
    }

    private HasEnabled getEnableable() {
        return (inputWidget instanceof HasEnabled) ? (HasEnabled) inputWidget : ALWAYS_ENABLED;
    }

    private static final HasEnabled ALWAYS_ENABLED = new HasEnabled() {
        @Override
        public boolean isEnabled() {
            return true;
        }

        @Override
        public void setEnabled( boolean enabled ) {

            // Whatever
        }
    };
}