using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Runtime.CompilerServices;
using System.Text;
using Veldrid.Common.Plot;

namespace Veldrid.Common.Legend
{
    public class Legend : BaseVeldridRender
    {
        MutiText text;

        public Legend(VeldridContent control) : base(control)
        {
            text = new MutiText(control,true,true);
        }
        internal override void DisposeResources()
        {
            base.DisposeResources();
            text?.DisposeResources();
        }
        internal override void CreateResources()
        {
            base.CreateResources();
            text.CreateResources();
            text.FontSize = 14;
        }
        public SeriesInfo[] SeriesInfos = new SeriesInfo[0];

        internal override void DrawData()
        {
            base.DrawData();
            if (SeriesInfos == null 
                || SeriesInfos.Length == 0 ) return;
            var count = SeriesInfos.Where(x => x.Visibily && x.Color.A > 0).ToArray();
            if(text.TextInfos.Length!= count.Length)
            {
                text.TextInfos = Enumerable.Range(0, count.Length).Select(x => new TextInfo()).ToArray();
            }
            for (int i = 0; i < count.Length; i++)
            {
                text.TextInfos[i].Text = "—— " + count[i].Name;
                text.TextInfos[i].Color = count[i].Color;
                text.TextInfos[i].Visibily = count[i].Visibily;
                text.TextInfos[i].VerticalAlignment = VerticalAlignment.Top;
                text.TextInfos[i].HorizontalAlignment = HorizontalAlignment.Right;
                text.TextInfos[i].Local = new PointF(Range.MaxX - 400, Range.MaxY - 300 - 500 * i);
            }
            text.Draw();
        }
    }
}