# -*- coding: utf-8 -*-
from bson.objectid import ObjectId
import sys

class BookDAO:

    # constructor for the class
    def __init__(self, database):
        self.db = database
        self.books = database.books

    def get_books(self):
        cursor = self.books.find()
        l = []
        for book in cursor:
            l.append(
                {'title':book['title'],
                 '_id':book['_id'],
                 'publisher':book['publisher'],
                 'isbn':book['isbn'],
                 'author':book['author']}
            )
        return l

    def get_book(self, book_id):
        book = self.books.find_one({"_id": ObjectId(book_id)})
        return book

    def insert_entry(self, book_title):
        print "inserting book entry", book_title

        book = {"title": book_title}

        # now insert the book
        try:
            result = self.books.insert_one(book)
            print "Matching book: ", result.matched_count
            print "Modified book: ", result.modified_count
        except:
            print "Error inserting book"
            print "Unexpected error:", sys.exc_info()
        
    def update_entry(self, book_id, book_title):
        print "updating book entry", book_title

        filter_doc = {"_id": ObjectId(book_id)}
        book = { "$set": {"name": book_title}}

        # now insert the book
        try:
            result = self.books.update_one(filter_doc, book)
            print "Modified book: ", result.modified_count
        except:
            print "Error inserting book"
            print "Unexpected error:", sys.exc_info()