class User():
    '''Creates a User class for a codewars style website'''

    def __init__(self):
        self.ranks = [-8, -7, -6, -5, -4, -3, -2, -1, 1, 2, 3, 4, 5, 6, 7, 8]    #15
        self.myprogress = 0
        self.level = 0
        self.myrank = self.ranks[self.level]

    def inc_progress(self, rank):
        activityrank = self.ranks.index(rank)
        myrank = self.level
        difference = activityrank - myrank

        if self.level < 15:

            if rank not in self.ranks:
                raise Exception('Invalid rank')

            if difference > 0:
                points = 10 * difference * difference
                self.myprogress += points

            elif difference == 0: self.myprogress += 3

            elif difference == -1: self.myprogress += 1

            if self.myprogress == 100:
                self.level += 1
                self.myrank = self.ranks[self.level]
                self.myprogress = 0

            if self.myprogress > 100:
                self.level += 1
                leftover = self.myprogress - 100
                self.myrank = self.ranks[self.level]
                self.myprogress = leftover

    def progress(self):
        return self.myprogress

    def rank(self):
        return self.ranks[self.level]