using System;

using ReactiveUI;

using System.Collections.Generic;

using System.Linq;

using ReactiveUI.Mobile;

namespace AndroidPlayground

{

public class App

{

static App _Current;

public static App Current {

get { return (_Current = _Current ?? new App()); }

}

public FuncServiceLocator Locator { get; protected set; }

protected App()

{

var locator = new FuncServiceLocator();

// TODO: Fix Me

//RxApp.ConfigureServiceLocator(

// (t, s) => locator.GetAllServices(t, s).FirstOrDefault(),

// (t, s) => locator.GetAllServices(t, s).ToArray(),

// (c, t, s) => locator.Register(() => Activator.CreateInstance(c), t, s));

locator.Register(() => typeof(MainView), typeof(IViewFor<MainViewModel>));

locator.Register(() => typeof(SecondaryView), typeof(IViewFor<SecondaryViewModel>));

// TODO: Fix Me

//RxApp.Register(typeof(AppBootstrapper), typeof(IApplicationRootState));

Locator = locator;

}

}

public class FuncServiceLocator

{

readonly Dictionary<Tuple<Type, string>, List<Func<object>>> _registry = new Dictionary<Tuple<Type, string>, List<Func<object>>>();

public void Register(Func<object> factory, Type type, string contract = null)

{

var pair = Tuple.Create(type, contract ?? "");

if (!_registry.ContainsKey(pair)) _registry[pair] = new List<Func<object>>();

_registry[pair].Add(factory);

}

public IEnumerable<object> GetAllServices(Type type, string contract = null)

{

var pair = Tuple.Create(type, contract ?? "");

if (!_registry.ContainsKey(pair)) {

return Enumerable.Empty<object>();

}

return _registry[pair].Select(x => x());

}

public void ClearRegistration(Type type, string contract = null)

{

var pair = Tuple.Create(type, contract ?? "");

if (_registry.ContainsKey(pair)) {

_registry.Remove(pair);

}

}

}

}