using System;
using System.Collections.Generic;
using Telligent.Evolution.Extensibility;
using Telligent.Evolution.Extensibility.Api.Version1;
using Telligent.Evolution.Extensibility.Version1;

namespace Samples
{
    public class BeforeInitializationPlugin : IBeforeInitializationPlugin
    {
        #region IPlugin Members
        public string Description
        {
            get { return "Executes before plugin initialize"; }
        }

        public string Name
        {
            get { return "BeforeInitializationPlugin Sample"; }
        }
        public void Initialize()
        {
            var service = Container.Get<ISampleService>(); //My service will be available
            Apis.Get<IEventLog>().Write(service.SayHello(), new EventLogEntryWriteOptions());
        }

        #endregion
        public void BeforeInitialize(BeforeInitializationArguments args)
        {
            //This runs before any plugin intializes

            if (args.Reason == PluginInitializationReason.AppStart || !Container.IsInitialized)
            {
                Container.Register<ISampleService>(new SomeSampleService());
            }
        }

     
    }

    #region Container and Service For Sample Purposes
    public static class Container
    {
        private static IDictionary<Type, object> _services = null;

        public static void Register<T>(T instance)
        {
            _services = new Dictionary<Type, object>();
            if (!_services.ContainsKey(typeof(T)))
                _services.Add(typeof(T),instance);
        }

        public static T Get<T>()
        {
            object item;
            _services.TryGetValue(typeof(T), out item);

            if (item == null)
                throw new InvalidOperationException("No binding for specified service was found");

            return (T) item;
        }

        public static bool IsInitialized
        {
            get { return _services != null; }
        }

    }


    public class SomeSampleService:ISampleService
    {
        public string SayHello()
        {
            return "Hello";
        }
    }

    public interface ISampleService
    {
        string SayHello();
    }
    #endregion
}