from tkinter import Tk , Canvas

#different type of cell with id and color

class type:


empty    =    [ 0 , "grey"]
start    =    [ 1 , "green"]
finish   =    [ 2 , "red"]
wall     =    [ 3 , "black"]
to_test  =    [ 4 , "violet"]
tested   =    [ 5 , "blue"]
path     =    [ 6 , "orange"]
provisoire=  [ 7 , "yellow"]

class cell():


def __init__(self, master, x, y, type , size):

    self.master = master
    self.abs = x
    self.ord = y
    self.type= type
    self.size= size

#change wall <-> empty
def _switch(self):
    if self.type[0] == type.empty[0]:
        self.type = type.wall
    elif self.type[0] == type.wall[0]:
        self.type=type.empty

# draw cell
def draw(self):
    fill    = self.type[1]


    xmin = self.abs * self.size
    xmax = xmin + self.size
    ymin = self.ord * self.size
    ymax = ymin + self.size

    self.master.create_rectangle(xmin, ymin, xmax, ymax, fill = fill)

class grid(Canvas):

    def __init__(self,master, rownbr, Columnbr, cellsize):

    Canvas.__init__(self, master, width = cellsize * Columnbr , height = cellsize * rownbr)

    self.cellsize = cellsize

    #matrix
    self.grid = []
    for row in range(rownbr):
        line = []
        for column in range(Columnbr):
            line.append(cell(self, column, row, type.empty, cellsize))

        self.grid.append(line)
    #place start and finish
    self.grid[4][4].type=type.start
    self.grid[rownbr-4][Columnbr-4].type=type.finish

    #mouse1
    self.bind("<Button-1>", self.Bout1)
    #mouse mouvement
    self.bind("<B1-Motion>", self.BoutDep)

    self.draw()

#draw grid
def draw(self):
    for ligne in self.grid:
        for case in ligne:
            case.draw()

#grid position
def _CoordEven(self, event):
    Column = int(event.y / self.cellsize)
    row = int(event.x / self.cellsize)
    return row, Column

#action depending on type click
#special action on start and finish
def Bout1(self, event):
    x, y = self._CoordEven(event)
    type = self.grid[x][y].type

    if self.type[0] == type.debut[0]:
        self.type=type.provisoire
        #self.bind("<Button-11>", self.Bout11)
    elif self.type[0] == type.arrive[0]:
        self.type=type.provisoire
        #self.bind("<Button-11>", self.Bout11)
    elif self.type[0] == type.vide[0]:
        self.type= type.mur
    elif self.type[0] == type.mur[0]:
        self.type = type.vide
    elif self.type[0] == type.mur[0]:
        self.type = type.vide
    self.grid[x][y].draw()

#if first click  on start or finish , 2nd click will move start or finish
#don't know how to code it
#def Bout11(self, event):


#if left click is pressed and moved , change only wall <-> empty
    def BoutDep(self,event):
       x, y = self._eventCoords(event)
       cell = self.grid[x][y]

       cell._switch()
       cell.draw()

if __name__ == "__main__" :

app = Tk()

cellgrid = grid(app, 50, 50, 10)
cellgrid.pack()

app.mainloop()