package kernel.web;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import kernel.util.StringUtils;
import security.web.BaseSecurityAction;

public class PageActionSupport extends BaseSecurityAction {

    /**	
     * Member Description
     */

    private static final long serialVersionUID = -27853059031238999L;

    protected Page page;

    protected List<Integer> tabs;

    protected int pageNo = 1;

    protected int pageSize = 10;
    
	/**
	 * 检查并设置pageNo
	 */
    public int checkAndSetPageNo(String pageNoStr) {
    	if (StringUtils.isNullOrEmpty(pageNoStr)) {
    		this.pageNo = 1;
    		return 1;
    	}
    	
    	Pattern pattern = Pattern.compile("-?[0-9]+(\\.[0-9]+)?");
    	Matcher isNum = pattern.matcher(pageNoStr);
    	if (!isNum.matches()) {
    		this.pageNo = 1;
    		return 1;
    	}
    	
    	int pageNo = Integer.valueOf(pageNoStr).intValue();
    	if (pageNo <= 0) {
    		this.pageNo = 1;
    		return 1;
    	} else {
    		this.pageNo = pageNo;
    		return pageNo;
    	}    	
    }

    public List<Integer> bulidTabs() {
        List<Integer> tabs = new ArrayList<Integer>();
        if (page == null) {
            return tabs;
        }
        int pageCount = 10;

        int thisPageNumber = page.getThisPageNumber();
        for (int i = 5; i > 0; i--) {
            if ((thisPageNumber - i) > 0) {
                tabs.add(thisPageNumber - i);
                pageCount--;
            }
        }
        tabs.add(thisPageNumber);
        for (int i = pageCount; i > 0; i--) {
            if ((thisPageNumber + i) <= page.getTotalPage()) {
                tabs.add(thisPageNumber + i);
            }

        }
        Collections.sort(tabs, new Comparator<Integer>() {
            public int compare(Integer arg0, Integer arg1) {
                return arg0.compareTo(arg1);
            }
        });

        return tabs;
    }

    public List<Integer> getTabs() {
        return tabs;
    }

    public Page getPage() {
        return page;
    }

    public void setPage(Page page) {
        this.page = page;
    }

    public int getPageNo() {
        return pageNo;
    }

    public void setPageNo(int pageNo) {
        this.pageNo = pageNo;
    }

    protected void setPageSize(int pageSize) {
        this.pageSize = pageSize;
    }

}