using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Microsoft.Xna.Framework;

class DayNightCycle
{
    private bool Time = false;
    private int nightTime = 0;
    private int dayTime = 0;
    private int lengthOfDay = 20000;
    private int lengthOfNight = 20000;
    private int Days = 1;
    private int DaysOfYear = 0;

    public void updateTime(int Speed)
    {
        Time = false;
        for (int i = 0; i < Speed; i++)
        {
            if (Time)
            {
                dayTime++;
                if (dayTime == lengthOfDay)
                {
                    Time = false;
                    dayTime = 0;
                }
            }
            else
            {
                nightTime++;
                if (nightTime == lengthOfNight)
                {
                    Time = true;
                    nightTime = 0;
                    Days++;
                    DaysOfYear++;
                }
            }
            if (DaysOfYear == 48)
            {
                DaysOfYear = 0;
            }
        }

    }

    //Season:
    //0 - Whole Year
    //1 - Spring
    //2 - Summer
    //3 - Autumn
    //4 - Winter

    public string getTimeOfYear()
    {
        if (DaysOfYear < 12)
            return "Spring";
        else if (DaysOfYear < 24)
            return "Summer";
        else if (DaysOfYear < 36)
            return "Autumn";
        else
            return "Winter";
    }

    public Color GetTimeOfDay()
    {
        int blue, red, brightness, green, potatorate = 255;
        if (nightTime == 0 && dayTime == 0)
        {
            red = 1;
            blue = 1;
            green = 1;
            brightness = 1;

        }
        else
        {
            if ((float)dayTime / lengthOfDay < 0.5)
            {
                blue = (int)(((float)nightTime / lengthOfNight) * potatorate) + (int)((1.0f - (float)dayTime / lengthOfDay) * potatorate);
            }
            else
            {
                blue = (int)(((float)nightTime / lengthOfNight) * potatorate) + (int)(((float)dayTime / lengthOfDay) * potatorate);
            }

            if ((float)nightTime / lengthOfNight < 0.5)
            {
                red = (int)((1.0 - (float)nightTime / lengthOfNight) * potatorate) + (int)(((float)dayTime / lengthOfDay) * potatorate);
            }
            else
            {
                red = (int)(((float)nightTime / lengthOfNight) * potatorate) + (int)(((float)dayTime / lengthOfDay) * potatorate);
            }

            if ((float)nightTime / lengthOfNight < 0.5)
            {
                green = (int)((1.0 - (float)nightTime / lengthOfNight) * potatorate) + (int)(((float)dayTime / lengthOfDay) * potatorate);
            }
            else
            {
                green = (int)(((float)nightTime / lengthOfNight) * potatorate) + (int)(((float)dayTime / lengthOfDay) * potatorate);
            }

            if (Time)
            {
                brightness = 255;
            }
            else
            {
                if ((float)nightTime / lengthOfNight < 0.5)
                {
                    brightness = (int)((1.0 - (float)nightTime / lengthOfNight) * 255) + (int)(((float)dayTime / lengthOfDay) * 255);
                }
                else
                {
                    brightness = (int)(((float)nightTime / lengthOfNight) * 255) + (int)(((float)dayTime / lengthOfDay) * 255);
                }
            }
        }
        return Color.FromNonPremultiplied(red, green, blue, 255);
    }

    public bool nDay()
    {
        if (Time)
            return true;
        else
            return false;
    }

    public int GetTimeOfDayInt()
    {
        if (Time)
        {
            return (int)(100 * ((float)(dayTime + nightTime) / (lengthOfDay + lengthOfNight))) + 1;
        }
        else
        {
            return (int)(100 * ((float)(lengthOfDay + nightTime) / (lengthOfDay + lengthOfNight))) + 1;
        }
        
        
    }

    public int getDays()
    {
        return Days;
    }
}