using System;
using System.Collections.Generic;
using System.Reflection;
using VDash.Overlay.Actions;
using VDash.Overlay.Config;
using System.Linq;

namespace VDash.Overlay
{
    public interface IOverlay : IDisposable
    {
        event EventHandler OverlayShown;
        event EventHandler OverlayHidden;

        ulong OverlayHandle { get; }
        IOverlayConfig OverlayConfig { get; }

        void Create();
        void Destroy();
        string GetOverlayName();
        float GetOverlayWidth();
        void SetOverlayWidth(float width);
        void SetOverlayName(string newName);

        int CurrentFPS { get; }
    }

    public class OverlayInfo : System.Attribute
    {
        public OverlayInfo(string description, Type configType, Type editorType)
        {
            Description = description;
            ConfigType = configType;
            EditorType = editorType;
        }

        public string Description { get; private set; }
        public Type ConfigType { get; private set; }
        public Type EditorType { get; private set; }

        public static IEnumerable<Type> GetTypesWithAttribute()
        {
            var assembly = Assembly.GetExecutingAssembly();
            foreach (Type type in assembly.GetTypes())
            {
                if (type.GetCustomAttributes(typeof(OverlayInfo), true).Length > 0)
                {
                    yield return type;
                }
            }
        }

        public class OverlayAttributeInfo
        {
            public OverlayAttributeInfo(Type type, OverlayInfo info)
            {
                OverlayType = type;
                Info = info;
            }

            public Type OverlayType { get; private set; }
            public OverlayInfo Info { get; private set; }
        }
        public static OverlayAttributeInfo[] GetOverlayInfos()
        {
            List<OverlayAttributeInfo> infos = new List<OverlayAttributeInfo>();
            var attrs = GetTypesWithAttribute();
            foreach(var attr in attrs)
            {
                OverlayInfo thingInfo = (OverlayInfo)attr.GetCustomAttribute(typeof(OverlayInfo), true);
                infos.Add(new OverlayAttributeInfo(attr, thingInfo));
            }
            return infos.ToArray();
        }
    }
}