Day of Week Separator

using System;
using cAlgo.API;
using cAlgo.API.Internals;
using cAlgo.API.Indicators;
using cAlgo.Indicators;

namespace cAlgo
{
    [Indicator(IsOverlay = true, TimeZone = TimeZones.UTC, AccessRights = AccessRights.None)]
    public class DayChanges : Indicator
    {

        [Parameter("Show Instructions?", DefaultValue = true)]
        public bool ShowInstructions { get; set; }

        protected override void Initialize()
        {

            if (Bars.TimeFrame >= TimeFrame.Daily)
            {
                Chart.DrawStaticText("Warning", "Indicator only suitable for below daily timeframe", VerticalAlignment.Bottom, HorizontalAlignment.Left, Color.Red);
            }


            string[] days = new string[] 
            {
                "Monday",
                "Tuesday",
                "Wednesday",
                "Thursday",
                "Friday",
                "Saturday",
                "Sunday"
            };

            if (ShowInstructions)
            {
                for (int i = 0; i < days.Length; i++)
                {
                    string day = days[i];
                    string msg = "";

                    for (int buffer = 0; buffer < i; buffer++)
                        msg += "\n";

                    msg += day;

                    Chart.DrawStaticText(day, msg, VerticalAlignment.Top, HorizontalAlignment.Left, GetColor(day));
                }
            }
        }

        public override void Calculate(int index)
        {
            if (Bars.TimeFrame < TimeFrame.Daily)
            {
                Chart.RemoveObject("Vertical " + index);

                DayOfWeek prevDay = GetDay(1);
                DayOfWeek today = GetDay(0);

                if (today != prevDay)
                    Chart.DrawVerticalLine("Vertical " + index, index, GetColor(today), 1, LineStyle.Dots);
            }

        }

        private DayOfWeek GetDay(int dayToGet)
        {
            if (dayToGet == 0)
                return Bars.OpenTimes.LastValue.DayOfWeek;
            else
                return Bars.OpenTimes.Last(dayToGet).DayOfWeek;
        }

        private Color GetColor(string day)
        {
            switch (day)
            {
                case "Monday":
                    return Color.ForestGreen;
                case "Tuesday":
                    return Color.Cyan;
                case "Wednesday":
                    return Color.Gold;
                case "Thursday":
                    return Color.Red;
                case "Friday":
                    return Color.Orange;
                case "Saturday":
                    return Color.Lavender;
                case "Sunday":
                    return Color.Lime;
                default:
                    throw new ArgumentException("Get Color does not have an option for: " + day.ToString() + " of type: " + day.GetType().ToString());
            }
        }

        private Color GetColor(DayOfWeek day)
        {
            switch (day)
            {
                case DayOfWeek.Monday:
                    return Color.ForestGreen;
                case DayOfWeek.Tuesday:
                    return Color.Cyan;
                case DayOfWeek.Wednesday:
                    return Color.Gold;
                case DayOfWeek.Thursday:
                    return Color.Red;
                case DayOfWeek.Friday:
                    return Color.Orange;
                case DayOfWeek.Saturday:
                    return Color.Lavender;
                case DayOfWeek.Sunday:
                    return Color.Lime;
                default:
                    throw new ArgumentException("Get Color does not have an option for: " + day.ToString() + " of type: " + day.GetType().ToString());
            }
        }


    }
}