class_name Player
extends CharacterBody3D

const MOVE_SPEED: float = 10
const MOVE_ACCELERATION: float = 100
const MOVE_DECELERATION: float = 50

const FALL_SPEED: float = 20
const FALL_ACCELERATION: float = 25

@export var _respawn_height: float = -5

var _respawn_point: Vector3


func _ready() -> void:
	_respawn_point = global_position
	Referencer.player = self


func _process(_delta: float) -> void:
	_mouse_turning()
	_process_respawning()


func _physics_process(delta: float) -> void:
	if not is_multiplayer_authority():
		return

	_mouse_turning()
	_lateral_movement(delta)
	_vertical_movement(delta)

	move_and_slide()


func _mouse_turning() -> void:
	var mouse_pos := get_viewport().get_mouse_position()
	var camera := Referencer.main_camera
	var from := camera.project_ray_origin(mouse_pos)
	var direction := camera.project_ray_normal(mouse_pos)
	var plane := Plane(Vector3.UP, global_position)
	var intersection: Variant = plane.intersects_ray(from, direction)
	if not intersection:
		return
	look_at(intersection as Vector3, Vector3.UP, true)


func _process_respawning() -> void:
	if global_position.y < _respawn_height:
		global_position = _respawn_point
		velocity = Vector3.ZERO


func _lateral_movement(delta: float) -> void:
	var input_dir := Input.get_vector("move_left", "move_right", "move_up", "move_down")
	var has_input := input_dir.length() > 0

	if has_input:
		var direction := Vector3(input_dir.x, 0, input_dir.y).normalized()
		var new_velocity := (direction * MOVE_SPEED).rotated(
			Vector3.UP, Referencer.main_camera.rotation.y
		)
		new_velocity.y = velocity.y
		velocity = velocity.move_toward(new_velocity, MOVE_ACCELERATION * delta)
	else:
		var new_velocity := Vector3.ZERO
		new_velocity.y = velocity.y
		velocity = velocity.move_toward(new_velocity, MOVE_DECELERATION * delta)


func _vertical_movement(delta: float) -> void:
	if not is_on_floor():
		var new_velocity := velocity
		new_velocity.y = -FALL_SPEED
		velocity = velocity.move_toward(new_velocity, FALL_ACCELERATION * delta)
	else:
		velocity.y = 0