extends Node3D

@export var sun_color : GradientTexture1D
@export var realtime : bool = false
@export var set_time = 17.0
@export var north_offset : float
@export var sun_energy_over_time : Curve
@export var moon_energy_over_time : Curve

@onready var sun: DirectionalLight3D = $Sun
@onready var moon: DirectionalLight3D = $Sun/Moon

func _ready() -> void:
	change_sun()

func change_sun():
	var sun_details = sun_angle_from_time()
	sun.rotation.x = sun_details["angle"]
	sun.rotation.y = north_offset
	sun.light_energy = sun_details["energy"]
	moon.light_energy = (2 - sun_details["energy"]) * .5

func sun_angle_from_time():
	var time_dict = Time.get_time_dict_from_system()
	var current_time
	if realtime:
		current_time = float(time_dict["hour"]) + (float(time_dict["minute"]) / 60)
	else:
		current_time = set_time
	
	var angle : float = deg_to_rad((current_time/24.0) * 360.0 + 90.0)
	var energy = sun_energy_over_time.sample(current_time)
	
	print("current time: ", current_time)
	print("Sun angle : ",rad_to_deg(angle))
	
	return {"angle" : angle, "energy" : energy}

func _on_property_list_changed() -> void:
	change_sun()