extends RigidBody3D
# Initially I used a CharacterBody3D, however, I wanted the player to bounce off
# other objects in the environment and that would have required manual handling
# of collisions. So that's why we're using a RigidBody3D instead.

const MOVE_SPEED := 8.0
const ACCELLERATION := 30.0
const DECELLERATION := 40.0
const JUMP_SPEED := 4.0

@export var camera_path: NodePath
@onready var cam: Camera3D = get_node(camera_path) if camera_path != NodePath("") else null

func _ready() -> void:
	axis_lock_angular_x = true
	axis_lock_angular_z = true
	angular_damp = 6.0
	contact_monitor = true
	max_contacts_reported = 4
	
func _integrate_forces(state):
	# Input as 2D vector
	var input2v := Input.get_vector("ui_left", "ui_right", "ui_up", "ui_down")
	
	# Camera based movement
	var forward := Vector3.FORWARD * -1.0
	var right := Vector3.RIGHT
	if cam:
		forward = cam.global_transform.basis.z
		right = cam.global_transform.basis.x
	# project onto ground plane so looking up/down doesn't tilt movement
	forward.y = 0.0
	right.y = 0.0
	if forward.length() > 0.0001: 
		forward = forward.normalized()
	if right.length() > 0.0001: 
		right = right.normalized()
		
	var dir := (right * input2v.x + forward * input2v.y).normalized()
	var target_v := dir * MOVE_SPEED
	
	var ax := ACCELLERATION if dir != Vector3.ZERO else DECELLERATION
	linear_velocity.x = move_toward(linear_velocity.x, target_v.x, ax * state.step)
	linear_velocity.z = move_toward(linear_velocity.z, target_v.z, ax * state.step)
	
	# Jump Logic
	var on_floor = false
	for i in state.get_contact_count():
		var normal = state.get_contact_local_normal(i)
		if normal.y > 0.5:
			on_floor = true
			break
	
	if on_floor and Input.is_action_just_pressed("ui_accept"):
		linear_velocity.y = JUMP_SPEED