import requests as rq 

# Request_api class made for import in the Library.py file. Seperate for better overview.
# Class intializes five parameters first to then have them assigned by requests get method.
# Requests are made to openlibrary, because they support api calls.

class request_api():
    
    def __init__(self):
        self.Booktitle = None
        self.Bookauthor = None
        self.Bookisbn = None
        self.Bookdate = None
        self.Booktext = None

    def search(self, input):
        filtered_input = ''
        for x in input:

            if x == ' ':
                x = '+'
            filtered_input += x

        Book = rq.get(f"https://openlibrary.org/search.json?q={filtered_input}&fields=key,title,author_name,editions,isbn,number_of_pages_median,publish_date,availability&limit=1")
        Booktext = Book.json()
        Bookinfo = Booktext['docs'][0]

        self.Booktitle = Bookinfo.get('title')
        self.Bookauthor = Bookinfo.get('author_name')
        self.Bookisbn = Bookinfo.get('isbn')
        self.Bookdate = Bookinfo.get('publish_date')

    # Return methods implemented for standardized retrieval of selected book properties.
    # Also for easy implementation of the next and previous book buttons while searching.
    def return_title(self, x):
        return self.Booktitle[x]

    def return_author(self, x):
        return self.Bookauthor[x]

    # If x (place in gotten book que) is None (after search) return entire list.
    # If IndexError (clicked next past que list) then return to first (zero) book entry in list.
    def return_isbn(self, x = None):
        try:
            if x != None:
                return self.Bookisbn[x]
            if x == None:
                return self.Bookisbn
        except IndexError:
                return self.Bookisbn[0]
        
    def return_date(self, x):
        return self.Bookdate[x]

    # If "Imageisbn = None" (after search) - set imageisbn to bookisbn of 0
    def out_image(self, imageisbn=None):
        if imageisbn is None:
            imageisbn = self.Bookisbn[0]    
        image_output = f'https://covers.openlibrary.org/b/isbn/{imageisbn}-L.jpg'
        return image_output

    # Small-Image functionality - not yet implemented.
    def out_image_small(self, imageisbn=None):
        if imageisbn is None:
            imageisbn = self.Bookisbn[0]    
        image_output = f'https://covers.openlibrary.org/b/isbn/{imageisbn}-M.jpg'
        return image_output