grounders-slowjam-2024/player/player.gd

# Automatically Generated From Builtin CharacterBody Template

extends CharacterBody3D
class_name Player

@export var SPEED = 5.0
@export var JUMP_VELOCITY = 4.5
var username: String = ""

var gravity = ProjectSettings.get_setting("physics/3d/default_gravity")

# Set by camera child, switch to signals if becomes too spaghetti
var movement_dir: Vector2 = Vector2.ZERO


# Signals fire continously every frame they're true
signal tag(player: Player)
signal ground(v: bool)

func _process(_delta):
	ground.emit(is_on_ground())
	var player := get_first_bumper()
	if player != null:
		tag.emit(player)

# Using signals to maintain a list of currently colliding players because it simplifies 
# Memory management substantially since nodes are not GC'd
# Connected nodes are the colliding nodes
signal check_bumping(src: Player)
var _is_grounded := false
signal check_grounded

func _ready():
	if username == "":
		username = "Player " + name

func is_on_ground() -> bool:
	_is_grounded = false
	check_grounded.emit(self)
	var v := _is_grounded
	_is_grounded = false
	return v
	

func _physics_process(delta):
	if not is_on_floor():
		velocity.y -= gravity * delta

	if Input.is_action_just_pressed("ui_accept") and is_on_floor():
		velocity.y = JUMP_VELOCITY

	if movement_dir:
		velocity.x = movement_dir.x * SPEED
		velocity.z = movement_dir.y * SPEED
	else:
		velocity.x = move_toward(velocity.x, 0, SPEED)
		velocity.z = move_toward(velocity.z, 0, SPEED)

	move_and_slide()

var _first_bumper: Player = null
	
func _bump_check(src: Player):
	if src._first_bumper == null:
		src._first_bumper = self
	
func get_first_bumper() -> Player:
	_first_bumper = null
	check_bumping.emit(self)
	var player := _first_bumper
	_first_bumper = null
	return player

func _on_tag_detection_area_entered(area):
	if not (area.get_parent() is Player):
		return
	var _other_player: Player = area.get_parent()
	if check_bumping.is_connected(_bump_check):
		return
	check_bumping.connect(_bump_check)
	
func _on_tag_detection_area_exited(area):
	if not (area.get_parent() is Player):
		return
	var _other_player: Player = area.get_parent()
	if not check_bumping.is_connected(_bump_check):
		return
	check_bumping.disconnect(_bump_check)


func _on_tag_detection_body_entered(body):
	if "grounded" in body:
		if not check_grounded.is_connected(body.grounded):
			check_grounded.connect(body.grounded)


func _on_tag_detection_body_exited(body):
	if "grounded" in body:
		if check_grounded.is_connected(body.grounded):
			check_grounded.disconnect(body.grounded)