# Path: expremigen/patterns/pattern.py
# class Pattern(metaclass=abc.ABCMeta):
#     """
#     abstract base class for a Pattern
#     """
# 
#     def __str__(self):
#         return "{0}".format(self.__class__.__name__)
# 
#     def __repr__(self):
#         return self.__str__()
# 
# Path: expremigen/patterns/utils.py
# def random_permutation(iterable, r=None):
#     """Random selection from itertools.permutations(iterable, r)"""
#     pool = tuple(iterable)
#     r = len(pool) if r is None else r
#     return tuple(random.sample(pool, r))


import copy
import itertools
import sys
from expremigen.patterns.pattern import Pattern
from expremigen.patterns.utils import random_permutation



class Pshuf(Pattern):
    """
    pattern to randomly shuffle elements from a list; the randomly shuffled list
    then is repeated verbatim for repats times
    """

    def __init__(self, alist=None, repeats=sys.maxsize):
        super().__init__()
        if alist is None:
            alist = []
        self.alist = copy.deepcopy(alist)
        self.repeats = repeats

    def __iter__(self):
        # following shuffles the list after repeating
        # return (i for i in random_permutation(itertools.chain.from_iterable(itertools.repeat(self.alist,
        # self.repeats))))

        # following shuffles the non-repeated list once and repeats it every time
        return (i for i in

# Path: expremigen/patterns/pattern.py
# class Pattern(metaclass=abc.ABCMeta):
#     """
#     abstract base class for a Pattern
#     """
# 
#     def __str__(self):
#         return "{0}".format(self.__class__.__name__)
# 
#     def __repr__(self):
#         return self.__str__()
# 
# Path: expremigen/patterns/utils.py
# def random_permutation(iterable, r=None):
#     """Random selection from itertools.permutations(iterable, r)"""
#     pool = tuple(iterable)
#     r = len(pool) if r is None else r
#     return tuple(random.sample(pool, r))


# Path: expremigen/patterns/pshuf.py
import copy
import itertools
import sys
from expremigen.patterns.pattern import Pattern
from expremigen.patterns.utils import random_permutation




class Pshuf(Pattern):
    """
    pattern to randomly shuffle elements from a list; the randomly shuffled list
    then is repeated verbatim for repats times
    """

    def __init__(self, alist=None, repeats=sys.maxsize):
        super().__init__()
        if alist is None:
            alist = []
        self.alist = copy.deepcopy(alist)
        self.repeats = repeats

    def __iter__(self):
        # following shuffles the list after repeating
        # return (i for i in random_permutation(itertools.chain.from_iterable(itertools.repeat(self.alist,
        # self.repeats))))

        # following shuffles the non-repeated list once and repeats it every time
        return (i for i in

                itertools.chain.from_iterable(itertools.repeat(random_permutation(self.alist), self.repeats)))