import goban,helper,database,login,gnugo
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.
	"""
	me = form["username"]
	player1 = gobandict["player1"]
	player2 = gobandict["player2"]
	play = gobandict["play"]

	if ((player1 == me) and (play == "white")) or ((player2 == me) and (play == "black")):
		return True
	else:
		return False
		

def create_gobandict(req,form,gamename):
	"""
	gets a gamename
	loads sgf, transforms it to dict, writes stuff like player names to dict
	returns dict
	"""
	#read goban sgf  from database
	mygame = database.GobanTable.byName(gamename)
	sgf = mygame.sgf
	gobandict = gnugo.parse_static_gnugo_sgf(sgf)
	gobandict["player1"] = mygame.player1
	gobandict["player2"] = mygame.player2
	gobandict["turn_number"] = mygame.turn_number
	gobandict["name"] = mygame.name
	gobandict["sgf"] = sgf
	return gobandict

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()))		
		gobandict = create_gobandict(req,form,gamename)
		#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 = create_gobandict(req,form,gamename)
					
			else:
				helper.debug(req,form,"it's not my turn.")
		data += """<br>Turn number: %s. %s plays.\n
		""" % (str(gobandict["turn_number"]), (string.capitalize(gobandict["play"])))
		
		#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>It's 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,form,1)
		req.write(data)
	
	else:
		req.write('Error: You have to select a game to play it!')