package com.temp.foundation.client.widget;

import com.google.gwt.user.client.ui.*;
import com.temp.common.shared.utils.*;
import com.temp.common.shared.validators.*;

public class Form {
    public static final String HTTPS_URL_REGEX =
            "^https\\:\\/\\/[0-9a-zA-Z]([-.\\w]*[0-9a-zA-Z])*(:(0-9)*)*(\\/?)([a-zA-Z0-9\\-\\.\\?\\,\\'\\/\\\\+&%\\$#_]*)?$";

    public static boolean somethingSelected( ListBox field ) {
        if ( field instanceof OptionBox<?> ) {
            return (null != ((OptionBox<?>) field).getSelected());
        }
        int selectedIndex = field.getSelectedIndex();
        if ( (0 <= selectedIndex) && (selectedIndex < field.getItemCount()) ) {
            String selectedItemText = StringUtils.noEmpty( field.getItemText( selectedIndex ) );
            if ( (selectedItemText != null) && !"-".equals( selectedItemText ) ) {
                return true;
            }
        }
        return false;
    }

    public static boolean validateSomethingSelected( ListBox field, Label error ) {
        return updateError( error, somethingSelected( field ) );
    }

    public static boolean validatePhone( boolean required, TextBox field, Label error ) {
        String value = StringUtils.noEmpty( field.getText() );
        boolean textOK = ((null == value) && !required) || PhoneValidator.INSTANCE.isValid( value );
        return updateError( error, textOK );
    }

    public static boolean validateEmail( boolean required, TextBox field, Label error ) {
        String value = StringUtils.noEmpty( field.getText() );
        boolean textOK = ((null == value) && !required) || EmailValidator.INSTANCE.isValid( value );
        return updateError( error, textOK );
    }

    public static boolean validatePasswords( boolean required, PasswordTextBox primeField, Label primeError, PasswordTextBox confirmField, Label confirmError ) {
        String prime = StringUtils.noEmpty( primeField.getText() );
        String confirm = StringUtils.noEmpty( confirmField.getText() );
        //if the passwords don't match bail
        if ( !updateError( confirmError, ObjectUtils.areEqual( prime, confirm ) ) ) {
            return false;
        }
        return updateError( primeError, !required || (prime != null) );
    }

    public static boolean validateTextIfNotEmptyMatches( TextBox field, String regEx, Label error ) {
        String value = StringUtils.noEmpty( field.getText() );
        boolean textOK = (null == value) || value.matches( regEx );
        return updateError( error, textOK );
    }

    public static boolean validateTextNotEmptyAndMatches( TextBox field, String regEx, Label error ) {
        String value = StringUtils.noEmpty( field.getText() );
        boolean textOK = (null != value) && value.matches( regEx );
        return updateError( error, textOK );
    }

    public static boolean validateTextNotEmpty( TextBox field, Label error ) {
        return validateTextNotEmpty( field.getText(), error );
    }

    public static boolean validateTextNotEmpty( String fieldText, Label error ) {
        boolean textOK = (null != StringUtils.noEmpty( fieldText ));
        return updateError( error, textOK );
    }

    public static boolean validateUrl( String url, Label error ) {
        boolean isValidUrl = !StringUtils.isBlank( url ) && url.matches( HTTPS_URL_REGEX );
        return updateError( error, isValidUrl );
    }

    public static void hideErrorIfNotEmpty( Object toCheck, Label error ) {
        if ( (toCheck == null) || ((toCheck instanceof String) && StringUtils.isBlank( toCheck.toString() )) ) {
            return;
        }
        showError( error, false );
    }

    public static boolean updateError( Label error, boolean fieldOK ) {
        showError( error, !fieldOK );
        return fieldOK;
    }

    public static void hideErrors( Label... errors ) {
        if ( errors != null ) {
            for ( Label error : errors ) {
                showError( error, false );
            }
        }
    }

    public static void showError( Label error, boolean showIt ) {
        showLabel( error, showIt );
    }

    public static void updateLabel( Label label, String text, boolean showIt ) {
        if ( label != null ) {
            label.setText( StringUtils.deNull( text ).trim() );
            showLabel( label, showIt );
        }
    }

    public static void showLabel( Label label, boolean showIt ) {
        if ( label != null ) {
            label.setVisible( showIt );
        }
    }
}