from graphics import Point, Line

class Cell:
    def __init__(self, window=None, lwall=True, twall=True, rwall=True, bwall=True):
        self._x1 = None
        self._y1 = None
        self._x2 = None
        self._y2 = None
        self._win = window
        self.lwall = lwall
        self.twall = twall
        self.rwall = rwall
        self.bwall = bwall

    def draw(self, x1, y1, x2, y2):
        if self._win is None:
            return
        self._x1 = x1
        self._y1 = y1
        self._x2 = x2
        self._y2 = y2
        
        self._win.draw_line(Line(Point(x1, y1), Point(x1, y2))) if self.lwall else self._win.draw_line(Line(Point(x1, y1), Point(x1, y2)), "white")
        self._win.draw_line(Line(Point(x1, y1), Point(x2, y1))) if self.twall else self._win.draw_line(Line(Point(x1, y1), Point(x2, y1)), "white")
        self._win.draw_line(Line(Point(x2, y1), Point(x2, y2))) if self.rwall else self._win.draw_line(Line(Point(x2, y1), Point(x2, y2)), "white")
        self._win.draw_line(Line(Point(x1, y2), Point(x2, y2))) if self.bwall else self._win.draw_line(Line(Point(x1, y2), Point(x2, y2)), "white")

    def draw_move(self, to_cell, undo=False):
        center_start = Point((self._x1+self._x2)>>1, (self._y1+self._y2)>>1)
        center_end = Point((to_cell._x1+to_cell._x2)>>1, (to_cell._y1+to_cell._y2)>>1)
        fill_color = "red"
        if undo:
            fill_color = "gray"
        self._win.draw_line(Line(center_start, center_end), fill_color)