/*
 * ARX: Powerful Data Anonymization
 * Copyright 2012 - 2017 Fabian Prasser, Florian Kohlmayer and contributors
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.deidentifier.arx.gui.view.impl.wizard;

import java.text.ParseException;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;
import java.util.Locale;

import org.deidentifier.arx.DataType;
import org.deidentifier.arx.aggregates.HierarchyBuilder;
import org.deidentifier.arx.aggregates.HierarchyBuilderOrderBased;

/**
 * A model for order-based builders.
 *
 * @author Fabian Prasser
 * @param <T>
 */
public class HierarchyWizardModelOrder<T> extends HierarchyWizardModelGrouping<T> {

    /** Locale. */
    private Locale                   locale;

    /**
     * Constructor to create an initial definition.
     *
     * @param dataType
     * @param locale
     * @param data
     */
    public HierarchyWizardModelOrder(final DataType<T> dataType, final Locale locale, String[] data) {
        super(data, dataType, false);
        this.locale = locale;
        this.update();
    }

    @Override
    public HierarchyBuilderOrderBased<T> getBuilder(boolean serializable) throws Exception {
        
        HierarchyBuilderOrderBased<T> builder;
        if (serializable) {
            builder = HierarchyBuilderOrderBased.create(super.getDataType(), data);
        } else {
            builder = HierarchyBuilderOrderBased.create(super.getDataType(), false);
        }
        
        builder.setAggregateFunction(this.getDefaultFunction());
        int level = 0;
        for (List<HierarchyWizardGroupingGroup<T>> list : super.getModelGroups()) {
            for (HierarchyWizardGroupingGroup<T> group : list){
                builder.getLevel(level).addGroup(group.size, group.function);
            }
            level++;
        }
        
        return builder;
    }
    
    /**
     * Returns the current locale.
     *
     * @return
     */
    public Locale getLocale() {
        if (locale == null) {
            return Locale.getDefault();
        } else {
            return locale;
        }
    }
    
    /**
     * Moves an item down.
     *
     * @param index
     * @return
     */
    public boolean moveDown(int index) {
        if (index>=data.length-1 || index<0) return false;
        String temp = data[index+1];
        data[index+1] = data[index];
        data[index] = temp;
        update();
        return true;
    }
    
    /**
     * Moves an item up.
     *
     * @param index
     * @return
     */
    public boolean moveUp(int index) {
        if (index<=0) return false;
        String temp = data[index-1];
        data[index-1] = data[index];
        data[index] = temp;
        update();
        return true;
    }

    @Override
    public void parse(HierarchyBuilder<T> builder) throws IllegalArgumentException {
        
        if (!(builder instanceof HierarchyBuilderOrderBased)) {
            return;
        }
        super.parse((HierarchyBuilderOrderBased<T>)builder);
    }

    /**
     * Sorts the data.
     *
     * @param type
     * @return
     */
    public boolean sort(final DataType<?> type){
        
        boolean result = true;
        try {
            Arrays.sort(this.data, new Comparator<String>(){
                @Override public int compare(String o1, String o2) {
                    try {
                        return type.compare(o1, o2);
                    } catch (NumberFormatException | ParseException e) {
                        throw new RuntimeException(e);
                    }
                }
            });
        } catch (Exception e) {
            result = false;
        }
        update();
        return result;
    }

    @Override
    protected void build() {
        super.hierarchy = null;
        super.error = null;
        super.groupsizes = null;

        if (data==null) return;
        
        HierarchyBuilderOrderBased<T> builder = null;
        try {
            builder = getBuilder(false);
        } catch (Exception e){
            super.error = e.getMessage();
            return;
        }
        
        String error = builder.isValid();
        if (error != null) {
            super.error = error;
            return;
        }
        
        try {
            super.groupsizes = builder.prepare(data);
        } catch(Exception e){
            super.error = e.getMessage();
            return;
        }
        
        try {
            super.hierarchy = builder.build();
        } catch(Exception e){
            super.error = e.getMessage();
            return;
        }
    }
}