/**

• 商品管理类
  */
  public class ArticleManage {

  ArticleSet articleSet = new ArticleSet();

public void initial () {
    Article xiyouji = new Article();
    xiyouji.setArticle("西游记" , 10 , 1,0);

    Article hongloumen = new Article();
    hongloumen.setArticle("红楼梦",20 , 1, 0);

    Article tutu = new Article();
    tutu.setArticle("图图" ,10,1,0 );

    articleSet.articles[0] = xiyouji;
    articleSet.articles[1] = hongloumen;
    articleSet.articles[2] = tutu;

}

public void startMenu () {
    boolean flag = true ;
    do {
        System.out.println("*******************************");
        System.out.println("1 新增图书");
        System.out.println("2 查看图书");
        System.out.println("3 删除图书");
        System.out.println("4 借出图书");
        System.out.println("5 归还图书");
        System.out.println("6 退出");
        System.out.println("********************************");

        System.out.println("请输入你要执行的功能编号：");
        Scanner scanner = new Scanner(System.in);
        int gongnengBianhao = scanner.nextInt();
        switch ( gongnengBianhao ) {
            case 1:
                System.out.println("新增图书");
                add();
                break;
            case 2:
                System.out.println("查看图书");
                chakan();
                break;
            case 3:
                System.out.println("删除图书");
                delete();
                break;
            case 4:
                System.out.println("借出图书");
                sell();
                break;
            case 5:
                System.out.println("归还图书");
                leaderboard();
                break;
            case 6:
                System.out.println("感谢使用，已经退出");
                flag = false ;
                break;
            default:
                System.out.println("你输入的功能编号有误");
                break;
        }
    }while ( flag );
}

public void leaderboard(){
    int count = 0 ;
    for ( int i = 0 ; i < articleSet.articles.length; i ++ ) {
        if ( articleSet.articles[i] != null ) {
            count ++ ;
        }
    }

    Article[] newTemp = new Article[count];

    for ( int i =0 ; i < count ; i ++ ) {
        newTemp[i] = articleSet.articles[i];
    }

    for ( int i =0 ; i < newTemp.length-1 ; i ++ ) {
        for ( int j = 0 ; j < newTemp.length -i-1 ; j++ ) {
            if ( newTemp[j+1] != null ) {
                if ( newTemp[j].number < newTemp[j+1].number ) {

                    Article temp = newTemp[j];
                    newTemp[j] = newTemp[j+1];
                    newTemp[j+1] = temp;
                }
            }
        }
    }
    // 显示名次
    System.out.println("名次： \t 销售数量 \t 商品名称");
    for (int i = 0; i < newTemp.length; i++) {
        System.out.println( (i+1) +"\t" + newTemp[i].number + "\t" + newTemp[i].name );
    }

}



public void sell(){
    System.out.println("请输入你要借出的书的名字：");
    Scanner scanner = new Scanner(System.in);
    String name = scanner.next();
    boolean flag = true;

    for (int i= 0 ; i < articleSet.articles.length ; i++){
        if ( articleSet.articles[i] != null && articleSet.articles[i].name.equals(name) ) {
            System.out.println("请输入要借出的数量：");
            int maichu = scanner.nextInt();
            if ( maichu < articleSet.articles[i].amount ) {

                articleSet.articles[i].amount = articleSet.articles[i].amount - maichu;

                articleSet.articles[i].number = articleSet.articles[i].number + maichu;
                flag = true;
            }else {
                flag = false;
                System.out.println("库存不够了");
            }
            break;
        } else {
            flag = false;

        }

    }
    if(flag) {
        System.out.println("卖出成功");
    }else{
        System.out.println("卖出失败");
    }




}

private void delete() {
    System.out.println("输入你要删除的书编号：");
    Scanner scanner = new Scanner(System.in);
    int delNo = scanner.nextInt();
    boolean flag = true;
    for ( int i = 0 ; i < articleSet.articles.length ; i ++ ) {
        if ( delNo ==  (i+1) && articleSet.articles[i] != null ) {
            int j = i ; // 备份下标
            while ( articleSet.articles[j+1] != null ) {
                articleSet.articles[j] = articleSet.articles[j+1] ;
                j++ ;
            }
            articleSet.articles[j] = null;
            flag = true;
            break;
        } else {
            flag =false;
        }
    }

    if (flag) {
        System.out.println("删除成功");
    }else {
        System.out.println("删除失败！");
    }


}

public void chakan() {
    System.out.println("编号 \t 名称 \t 库存 \t 单价 \t 售出数量");
    for (int i = 0; i < articleSet.articles.length; i++) {
        if ( articleSet.articles[i] != null ) {
            articleSet.articles[i].print(i+1);
        }
    }

}

public void add() {

    Scanner scanner = new Scanner(System.in);
    System.out.println("请输入书的名字：");
    String name = scanner.next();
    System.out.println("价格：");
    double price = scanner.nextDouble();
    System.out.println("库存：");
    int kucun = scanner.nextInt();
    System.out.println("售出数量：");
    int number  = scanner.nextInt();


    Article newArticle = new Article();
    newArticle.setArticle(name , kucun ,price , number );

    for ( int i =0 ; i < articleSet.articles.length ; i++ ) {
        if ( articleSet.articles[i] == null ) {
            articleSet.articles[i]  = newArticle;
            break;
        }
    }

}

}