package prj13_1;

import java.util.ArrayList;

//負責傳入一個大的集合，根據頁號返回所需要的數據
/*
 * 頁數=  
		記錄條數%每頁條數＝＝0     記錄條數/每頁條數
		否則          記錄條數/每頁條數+1
		第N頁顯示第幾條記錄(記錄從0開始算)? (N-1)*每頁條數=<序號< N*每頁條數
 * */
public class PageController {
	private ArrayList bigList;			//大的集合，外界傳入
	private int curentPageIndex = 1;	//當前頁號，外界傳入
	private int countPerpage 	= 5;	//每頁條數，外界可以設定
	private ArrayList smallList;		//小的集合，返回
	private int pageCount;				//頁數
	private int recordCount;			//記錄條數
	private int prePageIndex;			//上一頁序號
	private int nextPageIndex;			//下一頁序號
	private boolean firstPage;			//是否第一頁
	private boolean lastPage;			//是否最后一頁
	
	public void setCurentPageIndex(int curentPageIndex) {	//每當頁數改變，都會調用這個函數，篩選代碼可以寫在這里		
		this.curentPageIndex = curentPageIndex;
		
		//上一頁，下一頁確定
		prePageIndex = curentPageIndex - 1;
		nextPageIndex = curentPageIndex + 1;
		//是否第一頁，最后一頁
		if(curentPageIndex==1){
			firstPage = true;
		}
		else{
			firstPage = false;
		}
		if(curentPageIndex==pageCount){
			lastPage = true;
		}
		else{
			lastPage = false;
		}
		//篩選工作
		smallList = new ArrayList();
		for(int i=(curentPageIndex-1)*countPerpage; i<curentPageIndex*countPerpage&&i<recordCount; i++){
			smallList.add(bigList.get(i));
		}	
	}
	public int getCurentPageIndex() {
		return curentPageIndex;
	}
	public ArrayList getBigList() {
		return bigList;
	}
	public void setBigList(ArrayList bigList) {
		this.bigList = bigList;
		//計算條數
		recordCount = bigList.size();
		//計算頁數
		if(recordCount%countPerpage==0){
			pageCount = recordCount/countPerpage;
		}
		else{
			pageCount = recordCount/countPerpage + 1;
		}
		
	}
	public int getCountPerpage() {
		return countPerpage;
	}
	public void setCountPerpage(int countPerpage) {
		this.countPerpage = countPerpage;
	}
	public ArrayList getSmallList() {
		return smallList;
	}
	public void setSmallList(ArrayList smallList) {
		this.smallList = smallList;
	}
	public int getPageCount() {
		return pageCount;
	}
	public void setPageCount(int pageCount) {
		this.pageCount = pageCount;
	}
	public int getRecordCount() {
		return recordCount;
	}
	public void setRecordCount(int recordCount) {
		this.recordCount = recordCount;
	}
	public int getNextPageIndex() {
		return nextPageIndex;
	}
	public void setNextPageIndex(int nextPageIndex) {
		this.nextPageIndex = nextPageIndex;
	}
	public int getPrePageIndex() {
		return prePageIndex;
	}
	public void setPrePageIndex(int prePageIndex) {
		this.prePageIndex = prePageIndex;
	}
	public boolean isFirstPage() {
		return firstPage;
	}
	public void setFirstPage(boolean firstPage) {
		this.firstPage = firstPage;
	}
	public boolean isLastPage() {
		return lastPage;
	}
	public void setLastPage(boolean lastPage) {
		this.lastPage = lastPage;
	}
	

}