class_name ShotSetup extends Node3D

const PITCH_MIN := deg_to_rad(-60.0)
const PITCH_MAX := deg_to_rad(-5.0)
const ZOOM_LENGTH := 0.1

const ZOOM_MIN := 1.0
const ZOOM_MAX := 12.0

enum Phase {
	AIMING,
	LATERAL,
	POWER,
	FINISHED,
}

var base_speed: float = ProjectSettings.get_setting("game/config/controls/camera/free_camera_speed")

var x_sensitivity: float = ProjectSettings.get_setting(
	"game/config/controls/camera/x_axis_sensitivity"
)
var x_acceleration: float = ProjectSettings.get_setting(
	"game/config/controls/camera/x_axis_acceleration"
)
var y_sensitivity: float = ProjectSettings.get_setting(
	"game/config/controls/camera/y_axis_sensitivity"
)
var y_acceleration: float = ProjectSettings.get_setting(
	"game/config/controls/camera/y_axis_acceleration"
)

var invert_pitch: bool = ProjectSettings.get_setting("game/config/controls/camera/invert_pitch")

var _phase: Phase = Phase.AIMING

@onready var direction: Node3D = %Direction
@onready var pitch: Node3D = %Pitch
@onready var camera: Camera3D = %Camera

@onready var camera_distance := camera.position.z:
	set = _set_camera_distance

@onready var _target_rotation := Vector2(pitch.rotation.x, direction.rotation.y)


func _set_camera_distance(value: float) -> void:
	var tween := get_tree().create_tween()
	tween.tween_property(camera, "position", Vector3(0, 0, value), ZOOM_LENGTH).set_trans(
		Tween.TRANS_SINE
	)
	camera_distance = value


func _unhandled_input(event: InputEvent) -> void:
	if event is InputEventMouseButton:
		Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
	elif event is InputEventMouseMotion:
		if Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED:
			camera_motion((event as InputEventMouseMotion).relative)


func camera_motion(motion: Vector2) -> void:
	if _phase == Phase.AIMING:
		# Can only control camera while aiming
		_target_rotation.y = _target_rotation.y - deg_to_rad(motion.x * x_sensitivity)
		_target_rotation.x = clampf(
			_target_rotation.x - deg_to_rad(motion.y * y_sensitivity) * (-1 if invert_pitch else 1),
			PITCH_MIN,
			PITCH_MAX
		)


func _physics_process(delta: float) -> void:
	if _phase == Phase.AIMING:
		# Camera zoom
		if Input.is_action_just_pressed("shot_zoom_in"):
			camera_distance = max(camera_distance - 1.0, ZOOM_MIN)
		if Input.is_action_just_pressed("shot_zoom_out"):
			camera_distance = min(camera_distance + 1.0, ZOOM_MAX)

	# Rotation
	direction.rotation.y = lerp_angle(
		direction.rotation.y, _target_rotation.y, delta * x_acceleration
	)
	pitch.rotation.x = lerp_angle(pitch.rotation.x, _target_rotation.x, delta * y_acceleration)