/**
* # Speech Component
*
* Sends a message. Requires a shell.
*/
/obj/item/circuit_component/pathfind
display_name = "Pathfinder"
display_desc = "Calcualtes a path, returns a list of entities. Each entity is the next step in the path. Can be used with the direction component to move."
circuit_flags = CIRCUIT_FLAG_INPUT_SIGNAL|CIRCUIT_FLAG_OUTPUT_SIGNAL

var/datum/port/input/target_X
var/datum/port/input/target_Y

var/datum/port/output/output
var/datum/port/output/on_fail

/obj/item/circuit_component/pathfind/Initialize()
. = ..()
target_X = add_input_port("X", PORT_TYPE_NUMBER, FALSE)
target_Y = add_input_port("Y", PORT_TYPE_NUMBER, FALSE)

output = add_output_port("Output", PORT_TYPE_LIST)
on_fail = add_output_port("Failed", PORT_TYPE_SIGNAL)

/obj/item/circuit_component/pathfind/Destroy()
target_X = null
target_Y = null
output = null
on_fail = null
return ..()

/obj/item/circuit_component/pathfind/input_received(datum/port/input/port)
. = ..()
if(.)
return

if(isnull(target_X))
return

if(isnull(target_Y))
return

var/atom/movable/shell = parent.shell
var/turf/currentpos = get_turf(shell)
var/turf/destination = locate(target_X, target_Y, currentpos.z)

var/list/path = get_path_to(shell, destination)
if(!length(path))
on_fail.set_output(COMPONENT_SIGNAL)
return
else
output.set_output(path)