import goban,helper,psql,login
import string

DEBUG = 1

def is_my_turn(req,form,gobandict):
	"""
	gets request and util.FiedStorage form.
	check wether or not the current this is the players turn.
	return true or false.
	"""
	#INFO: player1 is black,player2 is white. black starts the game.
	me = form["username"]
	player1 = gobandict["player1"]
	player2 = gobandict["player2"]
	#get turn_number.
	turn_number = gobandict["turn_number"]
	#if player 2 can play: are we player two?
	#	yes:return True, else return False
	if turn_number % 2 == 0:
		if me == player2:
			return True
		else:
			return False
	#else:are we player1?
	#	yes:return True, else return False
	else:
		if me == player1:
			return True
		else:
			return False

		

	


def main(req,form):
	"""
	display selected goban and manage user input.
	"""

	try:
		gamename = form["game"]
	except:
		gamename = ""
	if gamename != "":
		data = ""
		req.write(helper.header())
		#helper.debug(req,form,str(form.keys()))		
		#read goban table from database
		tmplist = psql.read_table(gamename)
		#make a dictionary out of the list
		gobandict = psql.fetchall_list_to_goban_dict(tmplist)
		#check if user has already clicked onto a field:
		click_on_field = False
		for item in form.keys():
			if string.find(item,").x") > 0:
				click_on_field = True
		if click_on_field:
			#if yes: is this the user's turn? then process form.
			if is_my_turn(req,form,gobandict):
				helper.debug(req,form,"its my turn , i am going to process the form: --")
				retstring = goban.process_form(req,form,gobandict)
				if retstring != "":
					helper.debug(req,form,"playgame.main says: "+str(retstring))
				else:
					#reload gobandict, it has been changed.
					gobandict = psql.fetchall_list_to_goban_dict(psql.read_table(gamename))
			else:
				helper.debug(req,form,"its not my turn.")
		data += """<br>Turn number: %s. %s plays.\n
		""" % (str(gobandict["turn_number"]), ["White","Black"][int(gobandict["turn_number"] % 2)])
		
		#check whether its our turn
		#if yes: print 'your move' and display goban and process move
		#if not: print '...s move' and display goban.
		if is_my_turn(req,form,gobandict):
			data += "<br>Its your turn.<br>\n"
		else:
			data += "<br>This is not your turn. You have to wait for the move of the other player.<br>\n"
		#print goban
		data += goban.display_goban(gobandict,req,form)
		data += login.navigation_bar(req,form)
		data += helper.footer()
		req.write(data)
	
	else:
		req.write('Error: You have to select a game to play it!')