from dataclasses import dataclass
from secrets import choice
from src.models import KeypadSize
from src.utils import list_to_matrix, secure_fisher_yates_shuffle, matrix_to_list, matrix_transpose

@dataclass
class UserKeypad:
    keypad: list[int]
    keypad_size: KeypadSize

    @classmethod
    def create(cls, keypad_size: KeypadSize) -> 'UserKeypad':
        keypad = UserKeypad(
            keypad=list(range(keypad_size.numb_of_props)),
            keypad_size=keypad_size
        )
        keypad.random_keypad_shuffle()
        return keypad

    def sign_up_keypad(self):
        if self.keypad_size.is_dispersable:
            raise ValueError("Keypad size is dispersable")
        self.random_keypad_shuffle()
        keypad_matrix = self.keypad_matrix()
        attr_set_view = matrix_transpose(keypad_matrix)
        attr_set_view = secure_fisher_yates_shuffle(attr_set_view)
        attr_set_view = attr_set_view[:self.keypad_size.numb_of_keys]
        keypad_matrix = matrix_transpose(attr_set_view)
        return UserKeypad(
            keypad=matrix_to_list(keypad_matrix),
            keypad_size=KeypadSize(
                numb_of_keys=self.keypad_size.numb_of_keys,
                props_per_key=self.keypad_size.numb_of_keys
            )
        )

    def keypad_matrix(self) -> list[list[int]]:
        return list_to_matrix(self.keypad, self.keypad_size.props_per_key)

    def random_keypad_shuffle(self):
        keypad_view = self.keypad_matrix()
        keypad_view = secure_fisher_yates_shuffle(keypad_view)
        set_view = matrix_transpose(keypad_view)
        set_view = [secure_fisher_yates_shuffle(attr_set) for attr_set in set_view]
        keypad_view = matrix_transpose(set_view)
        self.keypad = matrix_to_list(keypad_view)

    def disperse_keypad(self):
        if not self.keypad_size.is_dispersable:
            raise ValueError("Keypad size is not dispersable")
        user_keypad_matrix = list_to_matrix(self.keypad, self.keypad_size.props_per_key)
        shuffled_keys = secure_fisher_yates_shuffle(user_keypad_matrix)

        attr_rotation = secure_fisher_yates_shuffle(list(range(self.keypad_size.numb_of_keys)))[
                        :self.keypad_size.props_per_key]
        dispersed_keypad = self.random_attribute_rotation(
            shuffled_keys,
            attr_rotation,
        )
        self.keypad = matrix_to_list(dispersed_keypad)

    def partial_keypad_shuffle(self):
        # TODO: this should be split shuffle
        numb_of_selected_sets = self.keypad_size.props_per_key // 2
        # randomly shuffle half the sets. if props_per_key is odd, randomly add one 50% of the time
        numb_of_selected_sets += choice([0, 1]) if (self.keypad_size.props_per_key & 1) == 1 else 0
        selected_sets = secure_fisher_yates_shuffle(list(range(self.keypad_size.props_per_key)))[:numb_of_selected_sets]
        user_keypad_matrix = self.keypad_matrix()
        shuffled_keys = secure_fisher_yates_shuffle(user_keypad_matrix)
        keypad_by_sets = []
        for idx, attrs in enumerate(matrix_transpose(shuffled_keys)):
            if idx in selected_sets:
                keypad_by_sets.append(secure_fisher_yates_shuffle(attrs))
            else:
                keypad_by_sets.append(attrs)
        self.keypad = matrix_to_list(matrix_transpose(keypad_by_sets))

    @staticmethod
    def random_attribute_rotation(
            user_keypad: list[list[int]],
            attr_rotation: list[int]
    ) -> list[list[int]]:
        transposed_user_keypad = matrix_transpose(user_keypad)
        if len(attr_rotation) != len(transposed_user_keypad):
            raise ValueError("attr_rotation must be the same length as the transposed user keypad")
        for idx, attr_set in enumerate(transposed_user_keypad):
            rotation = attr_rotation[idx]
            transposed_user_keypad[idx] = attr_set[rotation:] + attr_set[:rotation]
        return matrix_transpose(transposed_user_keypad)

    def attribute_adjacency_graph(self) -> dict[int, set[int]]:
        user_keypad_keypad = self.keypad_matrix()
        graph = {}
        for key in user_keypad_keypad:
            for attr in key:
                graph[attr] = set(key)
                graph[attr].remove(attr)
        return graph

    def get_attr_idx_by_keynumb_setidx(self, key_numb: int, set_idx: int) -> int:
        if not (0 <= key_numb < self.keypad_size.numb_of_keys):
            raise ValueError(f"key_numb must be between 0 and {self.keypad_size.numb_of_keys - 1}")
        if not (0 <= set_idx < self.keypad_size.props_per_key):
            raise ValueError(f"set_idx must be between 0 and {self.keypad_size.props_per_key - 1}")
        keypad_attr_idx = self.keypad_matrix()
        return keypad_attr_idx[key_numb][set_idx]