using System;
using Obvious.Soap;
using UnityEngine;

[RequireComponent(typeof(Light))]
[ExecuteInEditMode]
public class TimeOfDay : MonoBehaviour
{
	public FloatVariable timeOfDayGlobal;

	[Tooltip("Time of day normalized between 0 and 24h. For example 6.5 amount to 6:30am.")]
	public float timeOfDay = 12f;

	[SerializeField]
	[Tooltip("Sets the speed at which the time of day passes.")]
	private float timeSpeed = 1f;

	[SerializeField]
	private float latitude = 48.83402f;

	[SerializeField]
	private float longitude = 2.367259f;

	private DateTime date = new DateTime(2024, 4, 21).Date;

	private DateTime time;

	[SerializeField]
	[HideInInspector]
	private GUIStyle sliderStyle;

	internal static TimeOfDay instance;

	public bool isDebugGUIEnabled;

	private void OnEnable()
	{
		instance = this;
		TimeOfDayGlobalOnOnValueChanged(timeOfDayGlobal.Value);
		timeOfDayGlobal.OnValueChanged += TimeOfDayGlobalOnOnValueChanged;
	}

	private void OnDisable()
	{
		timeOfDayGlobal.OnValueChanged -= TimeOfDayGlobalOnOnValueChanged;
	}

	private void TimeOfDayGlobalOnOnValueChanged(float obj)
	{
		timeOfDay = obj;
	}

	private void Awake()
	{
		GetHoursMinutesSecondsFromTimeOfDay(out var hours, out var minutes, out var _);
		time = date + new TimeSpan(hours, minutes, 0);
	}

	private void OnValidate()
	{
		GetHoursMinutesSecondsFromTimeOfDay(out var hours, out var minutes, out var seconds);
		time = date + new TimeSpan(hours, minutes, seconds);
		SetSunPosition();
	}

	private void Update()
	{
		SetSunPosition();
	}

	private void SetSunPosition()
	{
		CalculateSunPosition(time, latitude, longitude, timeOfDay, out var outAzimuth, out var outAltitude);
		if (double.IsNaN(outAzimuth))
		{
			outAzimuth = base.transform.localRotation.y;
		}
		Vector3 euler = new Vector3((float)outAltitude, (float)outAzimuth, 0f);
		base.transform.localRotation = Quaternion.Euler(euler);
	}

	public void CalculateSunPosition(DateTime dateTime, double latitude, double longitude, float timeOfDay, out double outAzimuth, out double outAltitude)
	{
		float num = -23.45f * Mathf.Cos(MathF.PI * 2f * (float)(dateTime.DayOfYear + 10) / 365f);
		float num2 = 15f * (timeOfDay - 12f);
		num2 *= MathF.PI / 180f;
		float f = num * (MathF.PI / 180f);
		float f2 = (float)latitude * (MathF.PI / 180f);
		float num3 = Mathf.Sin(f2);
		float num4 = Mathf.Cos(f2);
		float num5 = Mathf.Cos(num2);
		float num6 = Mathf.Sin(f);
		float num7 = Mathf.Cos(f);
		float num8 = Mathf.Asin(num6 * num3 + num7 * num4 * num5);
		float num9 = Mathf.Cos(num8);
		float num10 = Mathf.Acos((num6 * num4 - num7 * num3 * num5) / num9);
		num8 *= 57.29578f;
		num10 *= 57.29578f;
		if (num2 >= 0f)
		{
			num10 = 360f - num10;
		}
		outAltitude = num8;
		outAzimuth = num10;
	}

	private void GetHoursMinutesSecondsFromTimeOfDay(out int hours, out int minutes, out int seconds)
	{
		hours = Mathf.FloorToInt(timeOfDay);
		minutes = Mathf.FloorToInt((timeOfDay - (float)hours) * 60f);
		seconds = Mathf.FloorToInt((timeOfDay - (float)hours - (float)minutes / 60f) * 60f * 60f);
	}
}