///Abstract class for an action an AI can take, can range from movement to grabbing a nearby weapon.
/datum/ai_behavior
	///What distance you need to be from the target to perform the action
	var/required_distance = 1
	///Flags for extra behavior
	var/behavior_flags = NONE
	///Cooldown between actions performances, defaults to the value of CLICK_CD_MELEE because that seemed like a nice standard for the speed of AI behavior
	var/action_cooldown = CLICK_CD_MELEE

/// Called by the ai controller when first being added. Additional arguments depend on the behavior type.
/// Return FALSE to cancel
/datum/ai_behavior/proc/setup(datum/ai_controller/controller, ...)
	return TRUE

///Called by the AI controller when this action is performed
/datum/ai_behavior/proc/perform(delta_time, datum/ai_controller/controller, ...)
	controller.behavior_cooldowns[src] = world.time + action_cooldown
	return

///Called when the action is finished. This needs the same args as perform besides the default ones
/datum/ai_behavior/proc/finish_action(datum/ai_controller/controller, succeeded, ...)
	LAZYREMOVE(controller.current_behaviors, src)
	controller.behavior_args -= type
	if(behavior_flags & AI_BEHAVIOR_REQUIRE_MOVEMENT) //If this was a movement task, reset our movement target if necessary
		if(!(behavior_flags & AI_BEHAVIOR_KEEP_MOVE_TARGET_ON_FINISH))
			controller.current_movement_target = null
		if(!(behavior_flags & AI_BEHAVIOR_KEEP_MOVING_TOWARDS_TARGET_ON_FINISH))
			controller.ai_movement.stop_moving_towards(controller)