# NimGame.py

from gamegrid import *
import random
            
class Match(Actor):
    def __init__(self):
         Actor.__init__(self, True, "sprites/match.gif")
         
def pressCallback(e):
    global nbMatches
    global nbTakenMatches
    loc = toLocationInGrid(e.getX(), e.getY()) 
    if loc.x > 46 and loc.x < 50 and loc.y > 2 and loc.y < 6:
        if nbTakenMatches == 0:
            setTitle("You have to remove at least 1 match!")
        else:
            nbTakenMatches = 0
            if nbMatches > 0: 
                setTitle("Computer play")
                computerMove()
    else: 
        actor = None
        for y in range(2, 8): 
            actor = getOneActorAt(Location(loc.x, y))
            if actor != None:
                break
        if actor != None:
            if nbTakenMatches == 3:
                setTitle("Take a maximum of 3. Click 'OK' to continue!")
            else:     
                actor.removeSelf()
                nbMatches -= 1
                nbTakenMatches += 1
                setTitle(str(nbMatches) + 
                   " matches remaining. Click 'OK' to continue.")
                if nbMatches == 0:
                    setTitle("You lost!")
                    addActor(Actor("sprites/gameover.gif"),Location(15,4))
        refresh()
    return True  

def nbWin(n):
    f = ((n - 1) // 4) * 4 + 1
    return f
     
def computerMove():
    global nbMatches
    nbRemovedMatches = nbMatches - nbWin(nbMatches)
    if nbRemovedMatches == 0:
      nbRemovedMatches = 1 # optimal strategy impossible
    nbMatches = nbMatches - nbRemovedMatches
    for x in range(nbRemovedMatches):
        matches = getActors(Match)
        if len(matches) > 0:
            k = int(random.random() * len(matches))
            removeActor(matches[k])   
            setTitle(str(nbMatches)+" matches remaining. Your move now.")
    if nbMatches == 0:
        setTitle("You win.")
        addActor(Actor("sprites/gameover.gif"), Location(15, 4))
    refresh()

makeGameGrid(52, 9, 12, False, mousePressed = pressCallback)
nbMatches = 15
nbTakenMatches = 0 
for i in range(15):
    match = Match()
    addActor(match, Location(2 + 3 * i , 4))
addActor(Actor("sprites/btn_ok_0.gif"), Location(48 , 4)) 
setTitle(str(nbMatches) + 
    " matches. Click on 1, 2 or 3 matches to remove, then click 'OK'.")  
show()
doRun()