using System.Collections;
using TMPro;
using UnityEngine;
using UnityEngine.Rendering.Universal;

public class DayNightCycleManager : MonoBehaviour
{
    public float dayLengthInMinutes = 15f;
    public float startTimeInHours = 6f; // Start time in hours
    public Light2D globalLight;
    public TMP_Text timeText;

    public Gradient lightColorGradient;
    public Gradient lightIntensityGradient;

    private float currentTime;


    // possible future additions
    // weather sys
    // skybox changes based on time of day
    // moon and stars
    // clouds
    // rain

    // Sound effects, bird chrirping, crickets, wind, etc

    // Temperture? 

    // Lighting effects! So that the transition is more visually appealing

    // Moonlight phases based on day of month ect

    // Seasons - impact the length of day, temp, weather, etc


    private void Start()
    {
        StartCoroutine(DayNightCycleCoroutine());
    }

    private void Update()
    {
        timeText.text = GetCurrentTime();
    }

    private string GetCurrentTime()
    {
        // Calculate the current hour and minute based on the time of day
        var timeOfDay = currentTime / (dayLengthInMinutes * 60);
        var hours = Mathf.FloorToInt(timeOfDay * 24);
        var minutes = Mathf.FloorToInt((timeOfDay * 24 - hours) * 60);

        // Convert to 12-hour format and add AM/PM
        var hours12 = hours % 12;
        if (hours12 == 0) hours12 = 12;
        var amPm = hours < 12 ? "AM" : "PM";

        return string.Format("{0:D2}:{1:D2} {2}", hours12, minutes, amPm);
    }

    private IEnumerator DayNightCycleCoroutine()
    {
        while (true)
            for (currentTime = startTimeInHours / 24 * dayLengthInMinutes * 60;
                 currentTime < dayLengthInMinutes * 60;
                 currentTime += Time.deltaTime)
            {
                // Calculate the current time of day between 0 (midnight) and 1 (next midnight)
                var timeOfDay = currentTime / (dayLengthInMinutes * 60);

                // Adjust the intensity of the light source based on the time of day

                // The intensity never goes below 0.05
                globalLight.color = lightColorGradient.Evaluate(timeOfDay);
                // globalLight.intensity = Mathf.Max(Mathf.Cos(timeOfDay * 2 * Mathf.PI) * -0.5f + 0.5f, 0.05f);
                globalLight.intensity = lightIntensityGradient.Evaluate(timeOfDay).a;

                yield return null;
            }
    }
}