package com.tzld.piaoquan.featurestools.util.page;

import java.util.List;

public class Page<T> {

    public static final String DEFAULT_PAGE_SIZE = "20";
    public static final String DEFAULT_CURRENT_PAGE = "1";

    private int currentPage = Integer.valueOf(DEFAULT_CURRENT_PAGE);
    private int totalSize;
    private int pageSize = Integer.valueOf(DEFAULT_PAGE_SIZE);

    private List<T> objs;

    private T obj;

    public Page() {
    }

    public Page(int currentPage) {
        this.currentPage = currentPage;
    }

    public Page(int currentPage, int pageSize) {
        setCurrentPage(currentPage);
        setPageSize(pageSize);
    }

    public int getNextPage() {
        return currentPage == getTotalPage() ? currentPage : currentPage + 1;
    }

    public int getPrePage() {
        return currentPage > 1 ? currentPage - 1 : 1;
    }

    public int getOffset() {
        return getCurPageFirstRecNum() - 1;
    }

    public int getCurPageFirstRecNum() {
        return (getCurrentPage() - 1) * pageSize + 1;
    }

    public int getCurPageLastRecNum() {
        return getCurrentPage() * pageSize;
    }

    public int getTotalPage() {
        int t = totalSize % pageSize > 0 ? totalSize / pageSize + 1 : totalSize / pageSize;
        if (t <= 0) {
            t = 1;
        }
        return t;
    }

    public void setObjs(List<T> objs) {
        this.objs = objs;
    }

    public List<T> getObjs() {
        return objs;
    }

    public int getCurrentPage() {
        return currentPage;
    }

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

    public int getTotalSize() {
        return totalSize;
    }

    public void setTotalSize(int totalSize) {
        this.totalSize = totalSize;
    }

    public int getPageSize() {
        return pageSize;
    }

    public void setPageSize(int pageSize) {
        if (pageSize > 0) {
            this.pageSize = pageSize;
        }
    }

    public boolean containData() {
        return getTotalSize() > 0;
    }
    @Override
    public String toString() {
        return "Page [currentPage=" + getCurrentPage() + ", totalSize=" + getTotalSize() + ", pageSize=" + getPageSize()
                + "]";
    }

    public T getObj() {
        return obj;
    }

    public void setObj(T obj) {
        this.obj = obj;
    }
}