package service;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;

import dao.BookDao;

import pojo.Book;

public class BookService {

	private ArrayList bookList = new ArrayList(); 
	
	private BookDao bDao = new BookDao();
	
	public ArrayList getBookList() {
		
		return bookList;
	}


	public BookService() {
		bookList = bDao.file2Object();
		
	}
	
	//添加图书
	public void add(String title, String author){

		bookList.add(new Book(bookList.size() + 1,title,author));
		
	}
	
	//删除图书 
	public boolean remove(int num){
		boolean flag = true;
		int size = bookList.size();
		for(int i = 0; i < size; i++){
			Book b = (Book)bookList.get(i);
			if(num == b.getNum()){
				bookList.remove(i);
				flag = false;
				break;
			}
			
		}
		return flag;
	}
	
	//借阅
	public String borrow(String title){
		int size = bookList.size();
		for(int i = 0; i < size; i++){
			Book b = (Book)bookList.get(i);
			if(b.getTitle().equals(title)){ //找到要借的书

				if(b.isBorrow()){//判断是否可借
					b.setBorrow(false); //设置为已借出
					b.setTime(b.getTime() + 1); //增加借阅次数
					return "成功借出";
				}else{
					return "此书已借出";
				}
			}
		}
		return "查无此书";
		
	}
	
	//归还
	public String back(String title){
		int size = bookList.size();
		for(int i = 0; i < size; i++){
			Book b = (Book)bookList.get(i);
			if(b.getTitle().equals(title)){
				if(!b.isBorrow()){
					b.setBorrow(true);
					return "归还成功";
				}else{
					return  "此书未借出";
				}
				
			}
			
		}
		return "查无此书";
		
	}
	
	//查询
	public Book search(String title){
		Book book = null;
		int size = bookList.size();
		for(int i = 0; i < size; i++){
			Book b = (Book)bookList.get(i);
			if(b.getTitle().indexOf(title) > -1){
				book = b;
				break;
			}
			
		}
		return book;
		
	}
	
	//排行榜
	public void sort(){
		//得到一共有多少本书
		Collections.sort(bookList);
		System.out.println("编号\t书名\t作者\t是否可借\t借阅次数");
		int size = bookList.size();
		for(int i = 0; i < size; i++){
			Book b = (Book)bookList.get(i);
			System.out.println(b.getNum()+"\t"+b.getTitle()+"\t"+b.getAuthor()+"\t"+(b.isBorrow()?"可借":"已借出")+"\t"+b.getTime());
		}
	}
	public void save(){
		FileWriter fw = null;
		try {
			fw = new FileWriter("d:/books.txt"); //建立程序到文件的通道，文件不存在，则新建文件
			int size = bookList.size();
			for(int i = 0; i < size; i++){
				Book b = (Book)bookList.get(i);
				String content = b.getNum()+","+b.getTitle()+","+b.getAuthor()+","+b.isBorrow()+","+b.getTime()+"\r\n";
				fw.write(content); //想问文件里写内容
			}
			
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} finally{
			try {
				fw.close(); //关闭通道
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	public void read() {
		File f = new File("d:/books.txt"); //实例化books.txt这个文件的对象
		if(f.exists()){ //判断文件是否存在
			FileReader fr = null;
			BufferedReader br = null;
			try {
				fr = new FileReader("d:/books.txt"); //建立文件读取通道
				br = new BufferedReader(fr); //实例化通道增强类
				String content = null;
//				while((content = br.readLine()) != null){ //循环读取文件中每一行，直到读取内容为空
//					String[] info = content.split(",");
//					Book b = new Book();
//					b.setNum(Integer.parseInt(info[0]));
//					b.setTitle(info[1]);
//					b.setAuthor(info[2]);
//					b.setBorrow(Boolean.parseBoolean(info[3]));
//					b.setTime(Integer.parseInt(info[4]));
//					this.bookList.add(b);
//				}
				do{
					content = br.readLine();
					String[] info = content.split(",");
					Book b = new Book();
					b.setNum(Integer.parseInt(info[0]));
					b.setTitle(info[1]);
					b.setAuthor(info[2]);
					b.setBorrow(Boolean.parseBoolean(info[3]));
					b.setTime(Integer.parseInt(info[4]));
					this.bookList.add(b);
					
				}while(content != null);
			} catch (NumberFormatException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (FileNotFoundException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			} finally{
				try {
					br.close(); //关闭通道
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			
		}
	}


	public void object2File() {
		// TODO Auto-generated method stub
		bDao.object2File(bookList);
	}
	
	
}