package org.apache.usergrid.persistence.index;/*
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 *
 */


import java.util.Arrays;

import org.apache.usergrid.persistence.core.scope.ApplicationScope;
import org.apache.usergrid.persistence.index.impl.IndexingUtils;


/**
 * Class to encapsulate search types
 */

public class SearchTypes {

    private static final SearchTypes ALL_TYPES = new SearchTypes();

    private final String[] types;


    private SearchTypes( final String... types ) {this.types = types;}


    /**
     * Generate our types to search on
     * @param applicationScope
     * @return
     */
    public String[] getTypeNames( ApplicationScope applicationScope ) {
        String[] typeNames = new String[types.length];
        for ( int i = 0; i < types.length; i++ ) {
            typeNames[i] = IndexingUtils.getType( applicationScope, types[i] );
        }
        return typeNames;
    }

    public String[] getTypes(){
        return types;
    }


    /**
     * Create a search that will search on the specified types
     */
    public static SearchTypes fromTypes( final String... types ) {
        return new SearchTypes( types );
    }


    /**
     * Get a search that will search all types in the specified context
     */
    public static SearchTypes allTypes() {
        return ALL_TYPES;
    }


    /**
     * Create a search type from a potentially nullable set of string.  If they are null, or empty, then allTypes is
     * returned otherwise the type will be returned
     */
    public static SearchTypes fromNullableTypes( final String... types ) {

        if ( isEmpty( types ) ) {
            return allTypes();
        }

        return fromTypes( types );
    }


    /**
     * Return true if the array is empty, or it's elements contain a null
     */
    private static boolean isEmpty( final String[] input ) {
        if ( input == null || input.length == 0 ) {
            return true;
        }

        for ( int i = 0; i < input.length; i++ ) {
            if ( input[i] == null ) {
                return true;
            }
        }

        return false;
    }


    @Override
    public boolean equals( final Object o ) {
        if ( this == o ) {
            return true;
        }
        if ( !( o instanceof SearchTypes ) ) {
            return false;
        }

        final SearchTypes that = ( SearchTypes ) o;

        if ( !Arrays.equals( types, that.types ) ) {
            return false;
        }

        return true;
    }


    @Override
    public int hashCode() {
        return Arrays.hashCode( types );
    }


    @Override
    public String toString() {
        return "SearchTypes{" +
                "types=" + Arrays.toString( types ) +
                '}';
    }
}