/obj/screen/movable/action_button
	var/datum/action/linked_action
	screen_loc = null

/obj/screen/movable/action_button/Click(location,control,params)
	var/list/modifiers = params2list(params)
	if(modifiers["shift"])
		moved = 0
		usr.update_action_buttons() //redraw buttons that are no longer considered "moved"
		return 1
	if(usr.next_move >= world.time) // Is this needed ?
		return
	linked_action.Trigger()
	return 1

//Hide/Show Action Buttons ... Button
/obj/screen/movable/action_button/hide_toggle
	name = "Hide Buttons"
	icon = 'icons/mob/actions.dmi'
	icon_state = "bg_default"
	var/hidden = 0

/obj/screen/movable/action_button/hide_toggle/Click(location,control,params)
	var/list/modifiers = params2list(params)
	if(modifiers["shift"])
		moved = 0
		return 1
	usr.hud_used.action_buttons_hidden = !usr.hud_used.action_buttons_hidden

	hidden = usr.hud_used.action_buttons_hidden
	if(hidden)
		name = "Show Buttons"
	else
		name = "Hide Buttons"
	UpdateIcon()
	usr.update_action_buttons()


/obj/screen/movable/action_button/hide_toggle/proc/InitialiseIcon(mob/living/user)
	if(isalien(user))
		icon_state = "bg_alien"
	else
		icon_state = "bg_default"
	UpdateIcon()

/obj/screen/movable/action_button/hide_toggle/proc/UpdateIcon()
	overlays.Cut()
	var/image/img = image(icon, src, hidden ? "show" : "hide")
	overlays += img


/obj/screen/movable/action_button/MouseEntered(location,control,params)
	openToolTip(usr,src,params,title = name,content = desc)


/obj/screen/movable/action_button/MouseExited()
	closeToolTip(usr)


/mob/proc/update_action_buttons_icon()
	for(var/X in actions)
		var/datum/action/A = X
		A.UpdateButtonIcon()

//This is the proc used to update all the action buttons.
/mob/proc/update_action_buttons(reload_screen)
	if(!hud_used || !client)
		return

	if(hud_used.hud_shown != HUD_STYLE_STANDARD)
		return

	var/button_number = 0

	if(hud_used.action_buttons_hidden)
		for(var/datum/action/A in actions)
			A.button.screen_loc = null
			if(reload_screen)
				client.screen += A.button
	else
		for(var/datum/action/A in actions)
			button_number++
			A.UpdateButtonIcon()
			var/obj/screen/movable/action_button/B = A.button
			if(!B.moved)
				B.screen_loc = hud_used.ButtonNumberToScreenCoords(button_number)
			else
				B.screen_loc = B.moved
			if(reload_screen)
				client.screen += B

		if(!button_number)
			hud_used.hide_actions_toggle.screen_loc = null
			return

	if(!hud_used.hide_actions_toggle.moved)
		hud_used.hide_actions_toggle.screen_loc = hud_used.ButtonNumberToScreenCoords(button_number+1)
	else
		hud_used.hide_actions_toggle.screen_loc = hud_used.hide_actions_toggle.moved
	if(reload_screen)
		client.screen += hud_used.hide_actions_toggle



#define AB_MAX_COLUMNS 10

/datum/hud/proc/ButtonNumberToScreenCoords(number) // TODO : Make this zero-indexed for readabilty
	var/row = round((number - 1)/AB_MAX_COLUMNS)
	var/col = ((number - 1)%(AB_MAX_COLUMNS)) + 1

	var/coord_col = "+[col-1]"
	var/coord_col_offset = 4 + 2 * col

	var/coord_row = "[row ? -row : "+0"]"

	return "WEST[coord_col]:[coord_col_offset],NORTH[coord_row]:-6"

/datum/hud/proc/SetButtonCoords(obj/screen/button,number)
	var/row = round((number-1)/AB_MAX_COLUMNS)
	var/col = ((number - 1)%(AB_MAX_COLUMNS)) + 1
	var/x_offset = 32*(col-1) + 4 + 2*col
	var/y_offset = -32*(row+1) + 26

	var/matrix/M = matrix()
	M.Translate(x_offset,y_offset)
	button.transform = M