package com.yuanchung.sales.util;

import java.util.ArrayList;
import java.util.Collection;

public class XPage {
	private int currentPage; //當前頁碼

	private int pageCount;//每頁記錄數

	private String path;//查詢路徑

	private int allCount;//總記錄數

	private Collection items;//查詢的數據集
    
	private Collection currentItems;//當前頁結果集
	
	private String pageBar;
	
	public Collection getCurrentItems() {		
		return currentItems;
	}
	public void setCurrentItems(int currentPage) {
		Collection currentItems = null;
		this.currentPage = currentPage;
		currentItems = new ArrayList();
    	ArrayList al = (ArrayList)items;
        if(currentPage < (allCount / pageCount) + 1){        	
        	for(int i = (currentPage - 1) * pageCount; i < currentPage * this.pageCount; i++){
        		currentItems.add(al.get(i));
        	}
		}else{
			for(int i = (currentPage - 1) * pageCount; i < allCount; i++){
        		currentItems.add(al.get(i));
        	}
		}
		this.currentItems = currentItems;
	}
	public XPage(){}
	public XPage(String path, int allCount, int currentPage, int pageCount, Collection items ){
		this.path = path;
		this.allCount = allCount;
		this.currentPage = currentPage;
		this.pageCount = pageCount;
		this.items = items;
	}
	
	public int getAllCount() {
		return allCount;
	}

	public void setAllCount(int allCount) {
		this.allCount = allCount;
	}

	public int getPageCount() {
		return pageCount;
	}

	public void setPageCount(int count) {
		this.pageCount = count;
	}

	public int getCurrentPage() {
		return currentPage;
	}

	public void setCurrentPage(int currentPage) {
		this.currentPage = currentPage;
	}

	public Collection getItems() {
		return items;
	}

	public void setItems(Collection items) {
		this.items = items;
	}

	public String getPath() {
		return path;
	}

	public void setPath(String path) {
		this.path = path;
	}
	
	public int getAllPage(){
		if(this.allCount % this.pageCount == 0){
			return (this.allCount)/this.pageCount;
		}else{
			return (this.allCount)/this.pageCount+1;
		}
	}
	public void setPageBar(){
		StringBuffer bar = new StringBuffer();
		bar.append("<%@ page language='java' pageEncoding='UTF-8'%>");
		bar.append("<div class='tableHead'>");
		if(this.currentPage<=1){
			bar.append("首頁&nbsp;&nbsp;&nbsp;上頁&nbsp;&nbsp;&nbsp;");
		}else{
			bar.append("<a href=\""+path+"&currentPage=1\">首頁</a>&nbsp;&nbsp;&nbsp;");
			bar.append("<a href=\""+path+"&currentPage="+(this.currentPage-1)+"\">上頁</a>&nbsp;&nbsp;&nbsp;");
		}
		bar.append("&nbsp;&nbsp;&nbsp;<select  name=\"xx\" onchange=\"forward(this.value)\">");
		for(int i=1;i<=this.getAllPage();i++){
			if(i==this.currentPage){
				bar.append("<option value='"+i+"' selected>"+i+"/"+this.getAllPage()+"</option>");
			}else{
				bar.append("<option value='"+i+"'>"+i+"/"+this.getAllPage()+"</option>");
			}
		}
		bar.append("</select></span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;");
		if(this.currentPage>=this.getAllPage()){
			bar.append("下頁&nbsp;&nbsp;&nbsp;尾頁");
		}else{
			bar.append("<a href=\""+path+"&currentPage="+(this.currentPage+1)+"\">下頁</a>&nbsp;&nbsp;&nbsp;");
			bar.append("<a href=\""+path+"&currentPage="+(this.getAllPage())+"\">尾頁</a>");
		}		
		bar.append("<span align=\"left\" style='margin-left:10px'>每頁"+this.pageCount+"條/共"+this.getAllPage()+"頁   共"+this.allCount+"條</span></div>");
		bar.append("<script>");
		bar.append("function forward(page){");
		bar.append(" location.href='"+path+"&currentPage='+page;");
		bar.append("}");
		bar.append("</script>");
		this.pageBar = bar.toString();		
	}
	public String getPageBar(){
		return this.pageBar;
	}
}