extends Camera2D
class_name RegionCamera

const MOVE_LERP_WEIGHT = 0.9
const ZOOM_LERP_WEIGHT = 0.05

const SHAKE_INTENSITY = 10.0
const SHAKE_SPEED = 500.0

const ZOOM_STEP = 0.1

@export var following : Node2D
@export var should_follow : bool = true
@onready var settings = GameInfo.settings_data 

@export var shake_active_time = -1
var shake_noise := FastNoiseLite.new()

func _input(_e):
    if Input.is_action_just_pressed("zoom_in"):
        settings.zoom = settings.zoom + ZOOM_STEP
        GameInfo.save_settings()
    if Input.is_action_just_pressed("zoom_out"):
        settings.zoom = settings.zoom - ZOOM_STEP
        GameInfo.save_settings()

func _ready():
    if following and should_follow:
        zoom =  Vector2.ONE * settings.zoom
        global_position = following.global_position

func _process(delta):
    if following and should_follow:
        global_position = following.global_position.lerp(global_position, MOVE_LERP_WEIGHT)
    
    zoom =  zoom.lerp(Vector2.ONE * settings.zoom, MOVE_LERP_WEIGHT)

    if shake_active_time > 0.:
        print(shake_noise.get_noise_2d(shake_active_time * SHAKE_SPEED, 0) * SHAKE_INTENSITY)
        shake_active_time -= delta

        offset = Vector2(
            shake_noise.get_noise_2d(shake_active_time * SHAKE_SPEED, 0) * SHAKE_INTENSITY,
            shake_noise.get_noise_2d(0, shake_active_time * SHAKE_SPEED) * SHAKE_INTENSITY,
        )
    else :
        offset = lerp(offset, Vector2.ZERO, 10.5 * delta)

func shake(time := 5):
    shake_noise.seed = randi()

    shake_active_time = time