import itertools
import enum


class Color(str, enum.Enum):
    RESET = "\033[0m"

    BLACK = "\033[30m"
    RED = "\033[31m"
    GREEN = "\033[32m"
    YELLOW = "\033[33m"
    BLUE = "\033[34m"
    MAGENTA = "\033[35m"
    CYAN = "\033[36m"
    GRAY = "\033[37m"
    WHITE = "\033[38m"


class Diff:
    def __init__(self, c1: str, c2: str):
        self.prev = ""
        self.c1 = c1
        self.c2 = c2

    @staticmethod
    def get(s1: str, s2: str, color_same: str, color_diff: str, color_reset: str = Color.RESET):
        out = ""
        is_diff = None
        for c1, c2 in itertools.zip_longest(s1, s2):
            if c2 is None:
                break
            if c1 == c2:
                if is_diff != False:
                    out += color_same
                    is_diff = False
                out += c2
            else:
                if is_diff != True:
                    out += color_diff
                    is_diff = True
                out += c2
        out += color_reset
        return out

    def consume(self, s: str):
        print(self.get(self.prev, s, self.c1, self.c2))
        self.prev = s