package nv.analyzer.impl;

import nv.analyzer.AnalyzerMethod;
import nv.data.DataStore;
import nv.data.impl.RowData;

import java.text.SimpleDateFormat;
import java.util.Comparator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 根据日期排序,设计到196x 年所以无法直接用时间类型比较,需要拆分字符串比较,你自己做把.
 */
public class DataSortMethod implements AnalyzerMethod {
    private SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/M/d");
    private SimpleDateFormat simpleDateFormat1 = new SimpleDateFormat("yyyy-MM-dd");
    
    public static final Pattern patten = Pattern.compile("(\\d+)/(\\d+)/(\\d+)");
    
    @Override
    public DataStore execute(DataStore dataStore) {
        final List<RowData> datas = dataStore.getDatas();
        
        //简单排序实现,因为年费有196x 年,按照时间排序会造成溢出,所以改为字符串截取判断
        datas.sort(new Comparator<RowData>() {
            @Override
            public int compare(RowData o1, RowData o2) {
                String date1 = o1.getValue("Date").replaceAll("-", "/");
                String date2 = o2.getValue("Date").replaceAll("-", "/");
                
                int y1 = 0, y2 = 0, m1 = 0, m2 = 0, d1 = 0, d2 = 0;
                
                Matcher matcher1 = patten.matcher(date1);
                while (matcher1.find()) {
                    y1 = Integer.parseInt(matcher1.group(1));
                    m1 = Integer.parseInt(matcher1.group(2));
                    d1 = Integer.parseInt(matcher1.group(3));
                }
                Matcher matcher2 = patten.matcher(date2);
                while (matcher2.find()) {
                    y2 = Integer.parseInt(matcher2.group(1));
                    m2 = Integer.parseInt(matcher2.group(2));
                    d2 = Integer.parseInt(matcher2.group(3));
                }
                if (y1 != y2)
                    return y1 - y2;
                else if (m1 != m2)
                    return m1 - m2;
                else if (d1 != d2)
                    return d1 - d2;
                else
                    return -1;
            }
        });
        return dataStore;
    }
    
    
}