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

namespace TINK.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>());
        }
    }
}