extends Node3D

@export var camera: Camera3D
@export var initial_target: Node3D
var target: Targetable = null
@export var sensitivity := 0.01
@export var charge_time := 1.7
@export var min_charge := 0.2

var camera_tweening = false

var time_targets := Dictionary()

func _ready():
	set_target(initial_target, false)
	time_targets[0] = target
	camera.set_as_top_level(true)
	ControllerEventBus.billiard_touched_billiard.connect(_on_billiard_touched_billiard)
	
	TAS_System.FrameIncremented.connect(frame_inc)
	TAS_System.FramesAdvanced.connect(frames_change)
	TAS_System.FramesRegressed.connect(frames_change)
	TAS_System.FramesReset.connect(frames_reset)

func frame_inc(frame: int):
	time_targets[frame] = target

func frames_change(_start: int, end: int):
	if time_targets[end] != target:
		set_target(time_targets[end].get_billiard())

func frames_reset():
	time_targets = Dictionary()
	time_targets[0] = target
	


func _on_billiard_touched_billiard(who: Billiard, touched: Billiard):
	var who_target = Targetable.is_targetable(who)
	if who_target != target or who.can_hit:
		return
	set_target(touched)
	ControllerEventBus.new_target.emit(touched)


func get_charge():
	return %radial_ui.charge_amount

func _input(event):
	var billiard := target.get_billiard()
	if camera_tweening or not MouseControl.mouse_is_locked():
		return
	if event is InputEventMouseMotion and get_charge() == 0.0 :
		rotate_view(event.relative*sensitivity)
	if event.is_action_released("charge") and not billiard.can_hit and charge_tween != null:
		release()
	if event.is_action_pressed("charge") and charge_tween == null:
		if billiard.can_hit:		
			charge(event.get_action_strength("charge"))
		else:
			$NoChargesSound.play()

func _process(_delta):
	transform.origin = target.global_position
	%camera_spot.look_at(target.global_position)
	if not camera_tweening:
		camera.global_transform = %camera_spot.global_transform
	else:
		camera.global_position = lerp(camera.global_position, %camera_spot.global_position, 0.5)
		camera.global_rotation = lerp(camera.global_rotation, %camera_spot.global_rotation, 0.5)
		var epsilon: float = 0.005
		if (camera.global_position - %camera_spot.global_position).length() <= epsilon and (camera.global_rotation - %camera_spot.global_rotation).length() <= epsilon:
			camera_tweening = false
			
		
	if get_charge() >= 1.0:
		cancel_charge()

func cancel_charge():
	%radial_ui.set_charge(0.0)
	%ChargeSound.stop()
	if charge_tween != null:
		charge_tween.kill()
		charge_tween = null
	var billiard := target.get_billiard()
	billiard.can_hit = true

func release():
	if get_charge() <= min_charge:
		cancel_charge()
		return
	%ChargeReleaseSound.volume_db = get_charge() * 12
	%ChargeReleaseSound.play()
	var billiard := target.get_billiard()
	TAS_System.StartIncrementingFrames()
	billiard.hit((target.global_position - %camera_spot.global_position).normalized(), get_charge())
	
	%radial_ui.set_charge(0.0)
	%ChargeSound.stop()
	if charge_tween != null:
		charge_tween.kill()
		charge_tween = null

var charge_tween: Tween = null
func charge(_amount: float):
	var billiard := target.get_billiard()
	billiard.can_hit = false
	if charge_tween != null:
		charge_tween.kill()
	charge_tween = create_tween()
	charge_tween.tween_method(%radial_ui.set_charge, 0.0, 1.0, charge_time)
	%ChargeSound.play()

func rotate_view(amount: Vector2):
	rotate_y(-amount.x)
	%rotate_helper.rotate_z(amount.y)
	%rotate_helper.rotation_degrees.z = clampf(%rotate_helper.rotation_degrees.z, -77, 77)


func set_target(node: Node3D, should_create_tween=true):
	camera_tweening = should_create_tween
	
	var ntarget = Targetable.is_targetable(node)
	var billiard = ntarget.get_billiard()
	billiard.can_hit = true
	if ntarget == null:
		push_error("Node is node targetable", node)
		return
	if target != null:
		target.unmake_target()
	ntarget.make_target()
	target = ntarget