class_name DashController
extends "res://controllers/AimedFleetAbilityController.gd"

# Energy Propulser active ability (#179): hold, aim a direction, release, and
# the complete fleet surges along that heading. Cooldown belongs to the
# particular Propulser selected by the shared ability controller, so adding a
# second hull adds a second independently recharging dash.

const DASH_COLOR := Color(0.85, 0.95, 0.15)
# The unupgraded reach, and what the definition declares. #205 made it a
# vessel stat; _aim_max_range() below is the distance actually in force.
const DASH_DISTANCE: float = 520.0
const ENERGY_PER_DASH: int = 15
const TRAIL_SECONDS: float = 0.45

var trail_from: Vector2 = Vector2.ZERO
var trail_time: float = 0.0


func _button_path() -> NodePath: return "../UI/DashButton"
func _status_path() -> NodePath: return "../UI/DashStatus"
func _component_id() -> String: return "distorder"
func _ammo_resource() -> String: return GameState.RESOURCE_ENERGY
func _ammo_cost() -> int: return ENERGY_PER_DASH
func _aim_padding() -> float: return 36.0
# Off the PROPULSER that will actually surge, falling back to the definition
# when none is ready - the same shape LaserController._aim_max_range() uses,
# and for the same reason: the guide must not promise reach the fleet has not
# researched.
func _aim_max_range() -> float:
	return GameState.vessel_stat(GameState.VESSEL_DISTORDER, "dash_distance")
func _has_effect_visuals() -> bool: return trail_time > 0.0 or fleet.is_dashing()


func _calculate_aim_target(drag: Vector2, origin: Vector2) -> Vector2:
	var direction: Vector2 = drag.normalized() if drag.length() > 0.001 else Vector2.UP
	return origin + direction * _aim_max_range()


func _consume_shot(component: Node) -> bool:
	return component.consume_dash()


func _perform_shot(_ship: Node2D, _component: Node) -> void:
	var direction: Vector2 = aim_target - _aim_origin()
	if direction.length() < 0.001:
		return
	trail_from = fleet.get_centroid()
	trail_time = TRAIL_SECONDS
	fleet.dash(direction, _aim_max_range())


func _advance_effects(delta: float) -> void:
	trail_time = maxf(trail_time - delta, 0.0)


func _draw() -> void:
	if aiming:
		var origin: Vector2 = _aim_origin()
		NeonDraw.draw_glowing_line(self, origin, aim_target, DASH_COLOR, 0.65, 0.65)
		var direction: Vector2 = (aim_target - origin).normalized()
		var side: Vector2 = direction.orthogonal() * 18.0
		NeonDraw.draw_glowing_path(self, PackedVector2Array([
			aim_target - direction * 38.0 + side, aim_target,
			aim_target - direction * 38.0 - side,
		]), DASH_COLOR, 0.9, 0.55)
	if trail_time > 0.0:
		var alpha: float = trail_time / TRAIL_SECONDS
		var now: Vector2 = fleet.get_centroid()
		for offset in [-20.0, 0.0, 20.0]:
			var across: Vector2 = (now - trail_from).normalized().orthogonal() * offset
			NeonDraw.draw_glowing_line(self, trail_from + across, now + across,
				DASH_COLOR, alpha * 0.6, 0.35)