from tkinter import Tk, Canvas


class Point:
    """
    Point represents the position of a point.
    """

    def __init__(self, x: int, y: int):
        self.x = x
        self.y = y


class Line:
    """
    Line represents a graphical line.
    """

    def __init__(self, point_a: Point, point_b: Point) -> None:
        self.point_a = point_a
        self.point_b = point_b


class Graphics:
    def __init__(self, canvas: Canvas) -> None:
        self._canvas = canvas

    def draw_line(
            self,
            line: Line,
            fill_colour: str = "black",
            width: int = 2
    ) -> None:
        """
        draws a line onto the canvas.
        """
        self._canvas.create_line(
            line.point_a.x, line.point_a.y,
            line.point_b.x, line.point_b.y,
            fill=fill_colour,
            width=width,
        )


class Window:
    """
    Window is a Graphical window.
    """

    def __init__(self, width: int, height: int) -> None:
        self._root = Tk()
        self._root.title("Maze Solver")

        # Position the window to the centre of the screen
        screen_width = self._root.winfo_screenwidth()
        screen_height = self._root.winfo_screenheight()
        centre_x = int(screen_width/2 - width/2)
        centre_y = int(screen_height/2 - height/2)
        self._root.geometry(f"{width}x{height}+{centre_x}+{centre_y}")

        # Styling
        self.background_colour = "white"
        self.cell_grid_colour = "black"

        self._canvas = Canvas(self._root)
        self._canvas.config(
            bg=self.background_colour,
            height=height,
            width=width,
        )
        self._canvas.pack()

    def redraw(self) -> None:
        """
        redraw redraws all the graphics in the window.
        """
        self._root.update_idletasks()
        self._root.update()