class_name MainCamera
extends Camera3D

@export var _height_offset: float = 0.5
@export var _distance: float = 50
@export var _angle_degrees: Vector3 = Vector3(-35, -45, 0)
@export var _aim_offset_factor_mouse: float = 0.2
@export var _aim_offset_factor_controller: float = 0.5
@export var _aim_damping: float = 1

var _player_offsets: Dictionary[int, PlayerOffset]

@onready var _listener := $AudioListener3D as AudioListener3D


func _ready() -> void:
	Referencer.main_camera = self
	_listener.make_current()


func _physics_process(delta: float) -> void:
	var follow_position: Vector3 = Vector3.ZERO
	for player in Referencer.players:
		follow_position += _follow(player, delta)
	follow_position /= Referencer.players_count
	follow_position += Vector3.UP * _height_offset

	global_rotation_degrees = _angle_degrees
	global_position = follow_position + transform.basis.z * _distance
	_listener.global_position = follow_position


func _follow(player: Player, delta: float) -> Vector3:
	var id := player.get_instance_id()
	if not _player_offsets.has(id):
		_player_offsets[id] = PlayerOffset.new()

	var player_offset := _player_offsets[id]

	var player_position := player.global_position
	if player.is_on_floor():
		player_offset.floor_height = player_position.y
	player_position.y = player_offset.floor_height + Projectile.HEIGHT

	if Referencer.players_count > 1:
		player_offset.aim_offset = Vector3.ZERO
	elif player.input_mode_is(Inputer.Mode.KB_MOUSE):
		player_offset.aim_offset = player.aiming.aim_offset
	elif player.input_mode_is(Inputer.Mode.CONTROLLER):
		var new_aim_offset := (
			Vector3.ZERO
			if player.aiming.aim_input.length() == 0
			else player.aiming.aim_offset
		)
		player_offset.aim_offset = player_offset.aim_offset.lerp(
			new_aim_offset, _aim_damping * delta
		)

	var follow_position := (
		player_position
		+ (
			player_offset.aim_offset as Vector3
			* (
				_aim_offset_factor_mouse
				if player.input_mode_is(Inputer.Mode.KB_MOUSE)
				else _aim_offset_factor_controller
			)
		)
	)

	Debugger.circle("follow_position" + str(player.name), follow_position)

	return follow_position


class PlayerOffset:
	var floor_height: float = 0
	var aim_offset: Vector3 = Vector3.ZERO