/src/sin/app/hbook/DataManager.java

package sin.app.hbook;



import sin.app.hbook.db.SimpleDB;

import sin.app.hbook.obj.Book;

import sin.app.hbook.obj.Evals;

import sin.app.hbook.obj.Genre;

import sin.app.hbook.obj.Points;

import sin.app.hbook.obj.User;

import sin.app.hbook.util.FileRW;



public class DataManager {

	final static int BHISTORY_MAX = 80;

	final static int EHISTORY_MAX = 50;



	private SimpleDB db;

	private CollaborativeFilter filter;



	// public BookHistory bhis;

	// public EvalHistory ehis;

	public User[] users;

	public int userNum = 0;

	public Book[] books;

	public int bookNum = 0;







	public DataManager(SimpleDB d) {

		db = d;



		// bhis = new BookHistory(HISTORY_MAX);

		// ehis = new EvalHistory(HISTORY_MAX);



		users = new User[10+1];

		for (int i = 0; i < users.length; i++)

			users[i] = new User(BHISTORY_MAX, EHISTORY_MAX);

		books = new Book[50];

		for (int i = 0; i < books.length; i++)

			books[i] = new Book();



		initDB();

	}



	private void initDB() {

		String tmp;

		String[] ary;

		int i;



		// users

		FileRW usersrw = new FileRW("users.txt");

		i = 0;

		// System.out.println("\n userID, username");

		while ((tmp = usersrw.readline()) != null) {



			if (!(tmp.charAt(0) == '/' && tmp.charAt(1) == '/')) {



				ary = tmp.split(" ");



				if (ary.length >= 2) {



					// "id name"

					users[i].userID = Integer.parseInt(ary[0]);

					users[i].name = ary[1];

					// System.out.println(users[i].userID + ", " +

					// users[i].name);



					if (i >= users.length)

						break;

				}

				i++;



			}

		}



		// books

		FileRW booksrw = new FileRW("books.txt");

		i = 0;

		// System.out.println("\n bookID, title, author, publisher, genreNumber");

		while ((tmp = booksrw.readline()) != null) {

			if (tmp.length() == 0) {

				continue;

			} else if (!(tmp.charAt(0) == '/' && tmp.charAt(1) == '/')) {



				ary = tmp.split(" ");



				if (ary.length >= 5) {



					// "id title author publisher genre"

					// int str str str int

					books[i].bookID = Integer.parseInt(ary[0]);

					books[i].title = ary[1];

					books[i].author = ary[2];

					books[i].publisher = ary[3];

					books[i].genre = int2genre(Integer.parseInt(ary[4]));

//					System.out.println("" + books[i].bookID + ", " +

//					books[i].title + ", " + books[i].author + ", " +

//					books[i].publisher + ", " + books[i].genre);



					if (i >= books.length)

						break;

				}

				i++;

			}

		}



		// books

		FileRW ehisrw = new FileRW("ehis.txt");

		// System.out.println("\n bookID, title, author, publisher, genreNumber");

		while ((tmp = ehisrw.readline()) != null) {

			if (tmp.length() == 0) {

				continue;

			} else if (!(tmp.charAt(0) == '/' && tmp.charAt(1) == '/')) {



				ary = tmp.split(" ");



				if (ary.length >= 3) {

					User u;

					long uid;

					long bid;

					Evals e;



					// "uid bid star"

					// long long int

					uid = Long.parseLong(ary[0]);

					bid = Long.parseLong(ary[1]);

					e = int2evals(Integer.parseInt(ary[2]));

					u = getUser(uid);



					u.ehis.pushEval(bid, e);

					// System.out.println("" + uid + ", " + bid + ", " +

					// e.name());



				}

			}

		}





		// books

		FileRW bhisrw = new FileRW("bhis.txt");

		// System.out.println("\n bookID, title, author, publisher, genreNumber");

		while ((tmp = bhisrw.readline()) != null) {

			if (tmp.length() == 0) {

				continue;

			} else if (!(tmp.charAt(0) == '/' && tmp.charAt(1) == '/')) {



				ary = tmp.split(" ");



				if (ary.length >= 2) {

					User u;

					long uid;

					long bid;



					// "uid bid star"

					// long long int

					uid = Long.parseLong(ary[0]);

					bid = Long.parseLong(ary[1]);

					u = getUser(uid);



					u.bhis.pushBook(bid);

//					System.out.println("" + uid + ", " + bid);



				}

			}

		}



		for (i=0; i<users.length; i++) {

			if (users[i].userID == -1)

				continue;



//			System.out.println("userid=" + i);

			calcPoints(users[i].userID);

		}



	}



	// DB???????

	public void readDB() {



	}



	// public getReccom

	public String[] getUserEval(long uid, int max) {

		return getUserEval(getUserName(uid), max);

	}





	public String[] getUserEval(String uid, int max) {

		//String[] result = new String[max * 3];

		String[] result = new String[max];

		int ptr = 0;

		User user = null;



		user = getUser(uid);



		if (user == null) {

			result[ptr] = "such no user";



		} else {

			// System.out.println("[debug]data.getUserEval(): max=" + max +

			// "user=" + user.name);



			for (int i=0; i<max; i++) {

				if (i >=user.ehis.getNum())

					break;



				Book b = getBook(user.ehis.getBook(i));

				if (b.title == null) {

					result[ptr] = "no evaluations";

					break;

				} else {

					result[ptr++] = "[" + b.bookID + "]?" + b.title + "? - " + user.ehis.getEvals(i).name();

					//result[ptr++] = "  " + b.author + ", " + b.publisher;

					//result[ptr++] = "  " + "eval: [" + user.ehis.getEvals(i).name() + "] by " + user.name + "[" + user.userID + "]";

				}

			}

		}



		return result;

	}





	public String[] getBookHistory(String username, int max) {

		String[] result = new String[max];

		int ptr = 0;

		User user = null;



		user = getUser(username);



		if (user == null) {

			result[ptr] = "hbshell: no such user";



		} else {

//			 System.out.println("[debug]data.getUserEval(): max=" + max +

//			 "user=" + user.name);



			for (int i=0; i<max; i++) {

//				System.out.println("[debug]data.getUserEval(): bhis.max=" + user.bhis.getMax());

				if (i >= user.bhis.getNum())

					break;



				Book b = getBook(user.bhis.getBook(i));

				if (b.title == null) {

					result[ptr] = "no histry";

					break;

				} else {

					result[ptr++] = "[" + b.bookID + "]?" + b.title + "?";

				}

			}



		}



		return result;

	}



	public String[] getBookHistory(long uid, int max) {

		return getBookHistory(getUserName(uid), max);

	}





	public Book getBook(long bid) {

		Book b = null;



		for (int i = 0; i < books.length; i++) {

			if (books[i].bookID == bid) {

				b = books[i];

				break;

			}

		}



		return b;

	}



	public User getUser(String name) {

		User u = null;



		for (int i = 0; i < users.length; i++) {

			if (users[i].name.equals(name)) {

				u = users[i];

				break;

			}

		}



		return u;

	}



	public User getUser(long uid) {

		User u = null;



		for (int i = 0; i < users.length; i++) {

			if (users[i].userID == uid) {

				u = users[i];

				break;

			}

		}



		return u;

	}



	public String getUserName(long uid) {

		User u = getUser(uid);



		return (u==null ? "" : u.name);

	}





	public long addUser(String name) {

		long uid = -1;



		for (int i=0; i<users.length; i++) {

			if (users[i].userID == -1) {

				users[i].userID = i;

				users[i].name = name;

				uid = users[i].userID;

				calcPoints(uid);

				break;

			}

		}



		return uid;

	}













	public boolean bookPush(long uid, long bid) {

		int n;

		boolean success = false;



		for (int i=0; i<users.length; i++) {

			if (users[i].userID == uid) {

				users[i].bhis.pushBook(bid);

				success = true;

				break;

			}

		}



		return success;

	}





	public boolean evalPush(long uid, long bid, int eval) {

		int n;

		User u = getUser(uid);

		boolean success = false;

		boolean alreadyEvaled = false;





		//????????

		for (int i=0; i<u.ehis.getNum(); i++) {

			if (u.ehis.getBook(i) == bid) {

				alreadyEvaled = true;

				break;

			}

		}



//		System.out.println(bid + ", " + eval + ", " + int2evals(eval));

		if (!alreadyEvaled && (int2evals(eval) != Evals.NULL)) {

			u.ehis.pushEval(bid, int2evals(eval));

			success = true;

		}



		return success;

	}





	//?????????????????????

	//???((s[1:5] - 3) * 2)????

	public void calcPoints(long uid) {

		User u = getUser(uid);

		Points p = u.pt;

		Book b = null;





		//i: ????????

		for (int i=0; i<p.getNum(); i++) {

			int num = u.bhis.getNum();

			int cnt = 0;

			float point;



//			System.out.println("ubhis.num=" + num);

			//?????????

			for (int j=0; j<num; j++) {

				b = getBook(u.bhis.getBook(j));



//				System.out.println("(i, j)=(" + i + ", " + j + "), isbook=" + (b == null));

//				if (b == null)

//					continue;



				if (int2genre(i) == b.genre)

					cnt++;

			}

			point = cnt / (float)num * 100;



			//?????????

			num = 0;

			for (int j=0; j<u.ehis.getNum(); j++) {

				Evals e = u.ehis.getEvals(j);

				b = getBook(u.ehis.getBook(j));



				if (u.ehis.getBook(j) == -1 || e == Evals.NULL)

					continue;



				if (b.genre == int2genre(i))

					num += (e.getStars() - 3) * 15;

			}

//			for (int j=0; j<u.ehis.getNum(); j++) {

//				int star = u.ehis.getEvals(i).getStars();

//				b = getBook(u.ehis.getBook(j));

//

//				if (b.bookID == -1)

//					continue;

//

//				if (b.genre == int2genre(i))

//					System.out.println("star=" + u.ehis.getEvals(i).name());

//					num += (star - 3) * 10;

//			}



			p.points[i] = (int)point + num;

		}

	}



	public String[] recom(long uid, int num) {

		String[] list = null;

		Genre g;



		g = CollaborativeFilter.detemineGenre(getUser(uid), this);



		list = new String[num + 1];

		list[0] = "genre: " + g.name();

		for (int i=1; i<=num; i++) {

			if (books[i].genre == g) {

				list[i] = "[" + books[i].bookID + "]?" + books[i].title + "?";

			}

		}



		return list;

	}









	public Evals int2evals(int e) {

		Evals evl = Evals.NULL;



		switch (e) {

		case 1:

			evl = Evals.STAR1;

			break;



		case 2:

			evl = Evals.STAR2;

			break;



		case 3:

			evl = Evals.STAR3;

			break;



		case 4:

			evl = Evals.STAR4;

			break;



		case 5:

			evl = Evals.STAR5;

			break;



		default:

			evl = Evals.NULL;

		}



		return evl;

	}



	public Genre int2genre(int g) {

		Genre gnr = Genre.NULL;



		switch (g) {

		case 0:

			gnr = Genre.Popular;

			break;



		case 1:

			gnr = Genre.Literature;

			break;



		case 2:

			gnr = Genre.Mistery;

			break;



		case 3:

			gnr = Genre.SciFi;

			break;



		case 4:

			gnr = Genre.Child;

			break;



		case 5:

			gnr = Genre.NonFiction;

			break;



		case 6:

			gnr = Genre.Essay;

			break;



		// default:

		// gnr = Genre.NULL;

		}



		return gnr;

	}



}