from __future__ import annotations

from array import array
from collections.abc import Callable, Iterable
from dataclasses import dataclass
from itertools import accumulate, combinations

from .aoc import Aoc2, AocSameParser


@dataclass
class Position:
    x: int
    y: int

    def __add__(self, other: Position) -> Position:
        return Position(self.x + other.x, self.y + other.y)

    def __sub__(self, other: Position) -> Position:
        return Position(self.x - other.x, self.y - other.y)

    def __or__(self, other: Position) -> int:
        return abs(self.x - other.x) + abs(self.y - other.y)

    def __rmul__(self, other: int) -> Position:
        return Position(other * self.x, other * self.y)

    def __getitem__(self, pi: int) -> int:
        if pi == 0:
            return self.x
        return self.y

    def __repr__(self) -> str:
        return f"[{self.x},{self.y}]"


class Matrix:
    def __init__(self, inpt: str) -> None:
        lines = inpt.splitlines()
        self.height = len(lines)
        self.width = len(lines[0])
        self.array = array("u")
        self.array_rot = array("u")
        for line in lines:
            self.array.fromlist(list(line))

        for line in zip(*lines):
            self.array_rot.fromlist(list(line))

    def __getitem__(self, pos: Position | tuple[int, int]) -> str:
        return self.array[self.width * pos[1] + pos[0]]

    def __setitem__(self, pos: Position | tuple[int, int], value: str) -> None:
        self.array[self.width * pos[1] + pos[0]] = value

    def get_row(self, row_no: int) -> array[str]:
        return self.array[self.width * row_no : self.width * (row_no + 1)]

    def iter_rows(self) -> Iterable[array[str]]:
        return (self.get_row(y) for y in range(self.height))

    def get_col(self, col_no: int) -> array[str]:
        return self.array_rot[self.height * col_no : self.width * (col_no + 1)]
        # return array("u", [self[col_no, y] for y in range(self.height)])

    def iter_cols(self) -> Iterable[array[str]]:
        return (self.get_col(x) for x in range(self.width))

    def __str__(self) -> str:
        return "\n".join((x.tounicode() for x in self.iter_rows()))

    def finditer(self, element: str) -> Iterable[Position]:
        return (
            Position(x, y)
            for y, line in enumerate(self.iter_rows())
            for x, char in enumerate(line)
            if char == element
        )

    def filter_row_ids(self, predicate: Callable[[array[str]], bool]) -> Iterable[int]:
        return (y for y, row in enumerate(self.iter_rows()) if predicate(row))

    def filter_col_ids(self, predicate: Callable[[array[str]], bool]) -> Iterable[int]:
        return (x for x, col in enumerate(self.iter_cols()) if predicate(col))


@dataclass
class Map:
    map: Matrix
    galaxies: Iterable[tuple[Position, Position]]

    @classmethod
    def from_input(cls, inpt: str) -> Map:
        matrix = Matrix(inpt)
        missing_xs = array(
            "I",
            accumulate([1 if col.count("#") == 0 else 0 for col in matrix.iter_cols()]),
        )

        missing_ys = array(
            "I",
            accumulate([1 if row.count("#") == 0 else 0 for row in matrix.iter_rows()]),
        )

        offset_galaxies = (
            (
                Position(
                    missing_xs[pos.x],
                    missing_ys[pos.y],
                ),
                pos,
            )
            for pos in matrix.finditer("#")
        )

        return cls(matrix, offset_galaxies)


class Day11(AocSameParser[Map], Aoc2[Map, Map]):
    def parseinput(self, inpt: str) -> Map:
        return Map.from_input(inpt)

    def part1(self, inpt: Map) -> int:
        return sum(
            g1 | g2 for g1, g2 in combinations(((o + g) for o, g in inpt.galaxies), 2)
        )

    def part2(self, inpt: Map) -> int:
        return sum(
            g1 | g2
            for g1, g2 in combinations(((999_999 * o + g) for o, g in inpt.galaxies), 2)
        )


def main() -> None:
    day11 = Day11(2023, 11)
    day11.run()


if __name__ == "__main__":
    main()