#!/usr/bin/env python

from dataclasses import dataclass, field
from typing import ClassVar

@dataclass
class Counter():
    top: int
    value: int


@dataclass
class Minter():
    legalstring: ClassVar[str] = "0123456789bcdfghjkmnpqrstvwxz"
    alphacount: ClassVar[int] = len(legalstring)
    digitcount: ClassVar[int] = 10
    
    oacounter: int = 0
    template: str = ""
    total: int = 0
    prefix: str = ""
    mask: str = ""
    active_counters: list[Counter] = field(default_factory=list)
    inactive_counters: list[Counter] = field(default_factory=list)

    def parse_template(self, template: str) -> int:
        """
        >>> m = Minter()
        >>> m.parse_template("test")
        -1
        >>> m.template
        'test'
        >>> m.prefix
        ''
        >>> m.mask
        'test'
        >>> m.parse_template("testkktest")
        -1
        >>> m.parse_template("rtesk")
        -1
        >>> m.parse_template("rteksk")
        -1
        >>> m.parse_template("rtkkes")
        -1
        >>> m.parse_template("reded")
        84100
        >>> m.parse_template("ed")
        -1
        >>> m.parse_template("red")
        290
        >>> m.parse_template("redk")
        290
        """
        self.template = template
        template = template.strip().removesuffix('/').strip()
        try:
            self.prefix, *_, self.mask = template.split(".")
        except ValueError:
            self.prefix = ""
            self.mask = template

        if self.mask[0] not in ("r", "s", "z"):
            return -1  # mask must begin with of the letters: r, s or z
        if "k" in self.mask and (self.mask.count("k") > 1 or self.mask[-1] != "k"):
            return -1
        if not all(char in ("d", "e") for char in self.mask.rstrip("k")[1:]):
            return -1
        self.total = 1
        for chr in self.mask:
            match chr:
                case "e":
                    self.total *= self.alphacount
                case "d":
                    self.total *= self.digitcount
        return self.total


if __name__ == "__main__":
    import doctest
    doctest.testmod()