extends CharacterBody3D

# Настройки скорости
const WALK_SPEED = 5.0
const SPRINT_SPEED = 8.5
const JUMP_VELOCITY = 4.5

# Настройки чувствительности мыши
@export var MOUSE_SENSITIVITY: float = 0.003

# --- Настройки тряски камеры (Head Bobbing) ---
const BOB_FREQ = 2.4     # Частота покачивания
const BOB_AMP = 0.08     # Амплитуда покачивания
var bob_time: float = 0.0

# Ссылки на узлы
@onready var head: Node3D = $Camera3D

func _ready() -> void:
	Input.mouse_mode = Input.MOUSE_MODE_CAPTURED

func _unhandled_input(event: InputEvent) -> void:
	if event.is_action_pressed("ui_cancel"):
		Input.mouse_mode = Input.MOUSE_MODE_VISIBLE

	if event is InputEventMouseButton and event.button_index == MOUSE_BUTTON_LEFT:
		Input.mouse_mode = Input.MOUSE_MODE_CAPTURED

	if event is InputEventMouseMotion and Input.mouse_mode == Input.MOUSE_MODE_CAPTURED:
		rotate_y(-event.relative.x * MOUSE_SENSITIVITY)
		head.rotate_x(-event.relative.y * MOUSE_SENSITIVITY)
		head.rotation.x = clamp(head.rotation.x, deg_to_rad(-80), deg_to_rad(80))

func _physics_process(delta: float) -> void:
	# 1. Гравитация
	if not is_on_floor():
		velocity += get_gravity() * delta

	# 2. Прыжок на Пробел
	if Input.is_key_pressed(KEY_SPACE) and is_on_floor():
		velocity.y = JUMP_VELOCITY

	# 3. Определение скорости (Спринт)
	var current_speed := WALK_SPEED
	if Input.is_key_pressed(KEY_SHIFT):
		current_speed = SPRINT_SPEED

	# 4. Управление WASD
	var input_dir := Vector2.ZERO
	if Input.is_key_pressed(KEY_D):
		input_dir.x += 1
	if Input.is_key_pressed(KEY_A):
		input_dir.x -= 1
	if Input.is_key_pressed(KEY_S):
		input_dir.y += 1
	if Input.is_key_pressed(KEY_W):
		input_dir.y -= 1

	input_dir = input_dir.normalized()

	# 5. Движение относительно взгляда персонажа
	var direction := (transform.basis * Vector3(input_dir.x, 0, input_dir.y)).normalized()
	if direction:
		velocity.x = direction.x * current_speed
		velocity.z = direction.z * current_speed
	else:
		velocity.x = move_toward(velocity.x, 0, current_speed)
		velocity.z = move_toward(velocity.z, 0, current_speed)

	# 6. Эффект тряски / раскачивания камеры (Head Bobbing)
	bob_time += delta * velocity.length() * float(is_on_floor())
	head.transform.origin = _head_bob(bob_time)

	move_and_slide()

# Функция расчета позиционирования камеры при шагах
func _head_bob(time: float) -> Vector3:
	var pos := Vector3.ZERO
	pos.y = sin(time * BOB_FREQ) * BOB_AMP
	pos.x = cos(time * BOB_FREQ / 2) * BOB_AMP
	return pos