using UnityEngine;
using RPGCreationKit;
using RPGCreationKit.SaveSystem;

namespace RPGCreationKit
{
	[ExecuteAlways]
	public class SunLightManager : MonoBehaviour
	{
		public static SunLightManager instance;
		private bool Loaded = false;
		private float TimeTrigger = 0f;

		[Header("References")]
		[SerializeField] private Light DirectionalLight; 
		[SerializeField] public SunLightPreset Preset;
		[SerializeField] private Transform StarsSky;
		[SerializeField] private Transform Player;
		[SerializeField] private LightingSettings InteriorLS;
		[SerializeField] private LightingSettings ExteriorLS;

		[Header("Time")]
		[SerializeField] public int Year = 0;
		[SerializeField] public int Month = 1;
		[SerializeField] public int Day = 1;
		[SerializeField, Range(0, 24)] public float TimeOfDay;

		private Material StarsMat;
		public bool IsInterior = false;

		void Start() {
			StarsMat = null;
			StarsMat = StarsSky.GetComponent<ParticleSystem>().GetComponent<Renderer>().sharedMaterial;
			
			Year = SaveSystemManager.instance.saveFile.Environment.Year;
			Month = SaveSystemManager.instance.saveFile.Environment.Month;
			Day = SaveSystemManager.instance.saveFile.Environment.Day;
			TimeOfDay = SaveSystemManager.instance.saveFile.Environment.TimeOfDay;

			Loaded = true;
		}

		// Update is called once per frame
		void Update() {
			if (TimeTrigger > TimeOfDay) { // Should only trigger once a day.
				Day += 1;
			}
			
			TimeTrigger = TimeOfDay;

			if (Day > 28) {
				Day = 1;
				Month += 1;
			}

			if (Month > 13) {
				Month = 1;
				Year += 1;
			}

			if (Loaded == false) {
				return;
			}

			if (Preset == null) {
				return;
			}

			if (Application.isPlaying) {
				TimeOfDay += (Time.deltaTime / 180f);
				TimeOfDay %= 24;
				float TimePercent = TimeOfDay / 24f;

				Color WorldBrightness = Preset.WorldBrightness.Evaluate(TimePercent);

				if (IsInterior == false) {

					// Setting the Sun
					if (DirectionalLight.gameObject.activeSelf == true) {
						if (RenderSettings.sun != DirectionalLight) {
							RenderSettings.sun = DirectionalLight;
										
						}
					}
					
					// Setting the Sun
					Color DirectionalTempColor = Preset.DirectionalColor.Evaluate(TimePercent);
					DirectionalLight.color = DirectionalTempColor;
					RenderSettings.skybox.SetFloat("_Exposure", (DirectionalTempColor.a * 5));

					// Setting the Ambiance Lighting
					//InteriorLS.indirectScale = WorldBrightness.a * 1.5f;
				} else {
					//ExteriorLS.indirectScale = WorldBrightness.a * 1.5f;
				}
				UpdateLighting(TimePercent);
			}
			
		}
		
		private void UpdateLighting(float TimePercent) {
			RenderSettings.ambientLight = Preset.AmbientColor.Evaluate(TimePercent);

			// Fog
			Color FogTempColor = Preset.FogColor.Evaluate(TimePercent);
			RenderSettings.fogColor = FogTempColor;
			RenderSettings.fogDensity = ((FogTempColor.a / 10) * 2);

			// Setting the stars
			StarsSky.position = Player.position;
			Color StarsColor = Preset.StarsVisability.Evaluate(TimePercent);
			Color color = StarsMat.color;
			color.a = StarsColor.a;
			StarsMat.color = color;

			// Sun Intensity (Item reflections power)
			Color SunTempInt = Preset.SunIntensity.Evaluate(TimePercent);
			DirectionalLight.intensity = ((SunTempInt.a) * 1.5f);
			
			if (DirectionalLight != null) {

				DirectionalLight.transform.localRotation = Quaternion.Euler(new Vector3((TimePercent * 360f) -90f, 170f, 0f));
				StarsSky.localRotation = Quaternion.Euler(new Vector3((TimePercent * 360f) -90f, -100, 40));
			}
		}

		public string GetMonth(int A) { // Ari, Tau, Gen, Can, Le, Ver, Lib, Sco, Sol, Sag, Cap, Aua, Pis.
			if (A == 0) {
				return "Aries";
			} else if (A == 1) {
				return "Taurus";
			} else if (A == 2) {
				return "Gemini";
			} else if (A == 3) {
				return "Cancer";
			} else if (A == 4) {
				return "Leo";
			} else if (A == 5) {
				return "Virgo";
			} else if (A == 6) {
				return "Libra";
			} else if (A == 7) {
				return "Scorpio";
			} else if (A == 8) {
				return "Sol";
			} else if (A == 9) {
				return "Sagittarius";
			} else if (A == 10) {
				return "Capricorn";
			} else if (A == 11) {
				return "Aquarius";
			} else {
				return "Pisces";
			}
		}
	}
}