from pygame.locals import *
import video

state = {}
commands = {}
bindings = {
	K_LEFT: '+left',
	K_RIGHT: '+right',
	K_UP: '+up',
	K_DOWN: '+down',
	K_RETURN: 'select',
	K_COMMA: '+leanleft',
	K_PERIOD: '+leanright',
	K_q: 'exit',
	K_d: 'debug',
	K_TAB: '+accel',
	K_BACKSPACE: '+brake',
}
aliases = {}
keys = {}

def keyup(key):
	global commands, keys, bindings, aliases
	if not key in keys:
		return
	del keys[key]
	if key in bindings:
		bind = bindings[key]
		if bind in commands:
			del commands[bind]
		if bind and bind[1:] in state:
			del state[bind[1:]]
def keydown(key):
	global commands, keys, bindings, aliases
	keys[key] = 0
	if key in bindings:
		bind = bindings[key]
		if bind in aliases:
			"execute alias TODO"
		elif bind and bind[0] == '+':
			state[bind[1:]] = 0
			add_command(bind[1:])
		elif bind:
			add_command(bind)

def add_command(cmd):
	global commands

	if not cmd in commands:
		commands[cmd] = 1
		return
	else:
		commands[cmd] += 1

def received_command(cmd):
	if cmd in commands:
		if commands[cmd] > 0:
			commands[cmd] -= 1
			return True
	return False

def received_command_multi(cmd):
	if cmd in commands:
		if commands[cmd] > 0:
			commands[cmd] = 0
			return True
	return False

def next_frame():
	global commands
	if video.skipping_next_frame():
		return

	commands = {}