using System;
using System.Collections.Generic;
using NUnit.Framework;

namespace ShareeBike.ViewModel.Settings
{
	[TestFixture]
	public class TestServicesViewModel
	{
		[Test]
		public void TestCtor()
		{
			var servicesViewModel = new ServicesViewModel(
				new List<string> {
					"ServiceA",
					"ServiceB",
					"ServiceB", // Dupes are removed
                    "ServiceC" },
				new Dictionary<string, string> {
					{ "ServiceA", "Top service of type A" },
					{ "ServiceB", "Supertop service of type B" },
					{ "OldsService", "This entry is discarded" }},
				"ServiceB");

			Assert.That(
				servicesViewModel.ServicesTextList,
				Is.EqualTo(new List<string> {
					"ServiceC",
					"Supertop service of type B",
					"Top service of type A" }).AsCollection);

			Assert.That(
				servicesViewModel.Active,
				Is.EqualTo("ServiceB"));
		}

		[Test]
		public void TestCtorInvalidActive()
		{
			Assert.That(
				() => new ServicesViewModel(
				new List<string> { "ServiceA", "ServiceB", "ServiceB", "ServiceC" },
				new Dictionary<string, string> { { "ServiceA", "Top service of type A" }, { "ServiceB", "Supertop service of type B" } },
				"ServiceX"),
				Throws.TypeOf<ArgumentException>());
		}

		[Test]
		public void TestCtorInvalidServiceNames()
		{
			Assert.That(
				() => new ServicesViewModel(
				new List<string> { "ServiceA", "ServiceB", "ServiceC" },
				new Dictionary<string, string> { { "ServiceA", "Top fast" }, { "ServiceB", "Top fast" } },
				"ServiceB"),
				Throws.TypeOf<ArgumentException>());
		}

		[Test]
		public void TestGetActiveTextDisplayTextAvailable()
		{
			var servicesViewModel = new ServicesViewModel(
				new List<string> {
					"ServiceB"},
				new Dictionary<string, string> {
					{ "ServiceB", "Supertop service of type B" }},
				"ServiceB");

			Assert.That(
				servicesViewModel.ActiveText,
				Is.EqualTo("Supertop service of type B"));
		}

		[Test]
		public void TestGetActiveTextNoDisplayText()
		{
			var servicesViewModel = new ServicesViewModel(
				new List<string> {
					"ServiceB"},
				new Dictionary<string, string>(),
				"ServiceB");

			Assert.That(
				servicesViewModel.ActiveText,
				Is.EqualTo("ServiceB"));
		}

		[Test]
		public void TestSetActiveText()
		{
			var servicesViewModel = new ServicesViewModel(
				new List<string> {
					"ServiceA",
					"ServiceB" },
				new Dictionary<string, string>(),
				"ServiceB")
			{
				ActiveText = "ServiceA"
			};

			Assert.That(
				servicesViewModel.ActiveText,
				Is.EqualTo("ServiceA"));
		}

		[Test]
		public void TestSetActiveTextInvalid()
		{
			var servicesViewModel = new ServicesViewModel(
				new List<string> {
					"ServiceA",
					"ServiceB" },
				new Dictionary<string, string>(),
				"ServiceB");

			Assert.That(
				() => servicesViewModel.ActiveText = "ServiceX",
				Throws.InstanceOf<ArgumentException>());
		}
	}
}