/**
    * Copyright 2010 The Kuali Foundation Licensed under the
    * Educational Community 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.osedu.org/licenses/ECL-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.kuali.student.common.search.dto;
  
  import java.io.Serializable;
  import java.text.SimpleDateFormat;
  import java.util.ArrayList;
  import java.util.Collections;
  import java.util.Comparator;
  import java.util.Date;
  import java.util.List;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  
  @XmlAccessorType(XmlAccessType.FIELD)
  public class SearchResult implements Serializable {
  	private static final long serialVersionUID = 1L;
  	private Integer startAt;
  	private Integer totalResults;
  	private List<SearchResultRow> rows;
  	private String sortColumn;
  	private SortDirection sortDirection;
  	public Integer getStartAt() {
  		return startAt;
  	}
  	public void setStartAt(Integer startAt) {
  		this.startAt = startAt;
  	}
  	public Integer getTotalResults() {
  		return totalResults;
  	}
  	public void setTotalResults(Integer totalResults) {
  		this.totalResults = totalResults;
  	}
  	public List<SearchResultRow> getRows() {
  		if (rows == null) {
  			rows = new ArrayList<SearchResultRow>(0);
  		}
  		return rows;
  	}
  	public void setRows(List<SearchResultRow> rows) {
  		this.rows = rows;
  	}
  	public String getSortColumn() {
  		return sortColumn;
  	}
  	public void setSortColumn(String sortColumn) {
  		this.sortColumn = sortColumn;
  	}
  	public SortDirection getSortDirection() {
  		return sortDirection;
  	}
  	public void setSortDirection(SortDirection sortDirection) {
  		this.sortDirection = sortDirection;
  	}
  	
      public void sortRows() {
          if (sortColumn != null) {
              Collections.sort(getRows(), new SearchResultRowComparator(sortColumn, sortDirection));
          }
      }
  	
  	/**
       * Compares two SearchResultRow rows with a given sort direction and column
       *
       */
      private static class SearchResultRowComparator implements Comparator<SearchResultRow> {
          private String sortColumn;
          private SortDirection sortDirection;
  
          public SearchResultRowComparator(String sortColumn, SortDirection sortDirection) {
              super();
              this.sortColumn = sortColumn;
              this.sortDirection = sortDirection;
  
          }
  
          @Override
          public int compare(SearchResultRow r1, SearchResultRow r2) {
              int compareResult = 0;
  
              //Pares out the cell values to compare
              String v1 = null;
              String v2 = null;
              for (SearchResultCell c : r1.getCells()) {
                 if (sortColumn.equals(c.getKey())) {
                     v1 = c.getValue();
                     break;
                 }
             }
             for (SearchResultCell c : r2.getCells()) {
                 if (sortColumn.equals(c.getKey())) {
                     v2 = c.getValue();
                     break;
                 }
             }
 
             //Compare the values wiuth the right type (SHould be done more efficiently
             try {
                 Integer v1Integer = Integer.parseInt(v1);
                 Integer v2Integer = Integer.parseInt(v2);
                 compareResult = v1Integer.compareTo(v2Integer);
             } catch (Exception e1) {
                 if (v1 != null && v2 != null && ("true".equals(v1.toLowerCase()) || "false".equals(v1.toLowerCase())) &&
                         ("true".equals(v2.toLowerCase()) || "false".equals(v2.toLowerCase()))) {
                     Boolean v1Boolean = Boolean.parseBoolean(v1);
                     Boolean v2Boolean = Boolean.parseBoolean(v2);
                     compareResult = v1Boolean.compareTo(v2Boolean);
                 } else {
                     try {
                         SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
                         Date v1Date = df.parse(v1);
                         Date v2Date = df.parse(v2);
                         compareResult = v1Date.compareTo(v2Date);
                     } catch (Exception e) {
                         if (v1 != null && v2 != null) {
                             compareResult = v1.compareTo(v2);
                         } else if (v2 == null) {
                             compareResult = 0;
                         } else {
                             compareResult = -1;
                         }
                     }
                 }
             }
 
             //Sort reverse if order is descending
             if (SortDirection.DESC.equals(sortDirection)) {
                 return -1 * compareResult;
             }
             return compareResult;
         }
     }
 }