using System.Linq;
using NUnit.Framework;
using Umbraco.Cms.Core.Configuration.Models;
using Umbraco.Cms.Core.Configuration.UmbracoSettings;

namespace Umbraco.Cms.Tests.UnitTests.Umbraco.Core.Configuration.Models
{
    [TestFixture]
    public class RequestHandlerSettingsTests
    {
        [Test]
        public void Given_CharCollection_With_DefaultEnabled_MergesCollection()
        {
            var userCollection = new CharItem[]
            {
                new () { Char = "test", Replacement = "replace" },
                new () { Char = "test2", Replacement = "replace2" }
            };


            var settings = new RequestHandlerSettings { CharCollection = userCollection };
            var actual = settings.CharCollection.ToList();

            var expectedCollection = RequestHandlerSettings.DefaultCharCollection.ToList();
            expectedCollection.AddRange(userCollection);

            Assert.AreEqual(expectedCollection.Count, actual.Count);
            Assert.That(actual, Is.EquivalentTo(expectedCollection));
        }

        [Test]
        public void Given_CharCollection_With_DefaultDisabled_ReturnsUserCollection()
        {
            var userCollection = new CharItem[]
            {
                new () { Char = "test", Replacement = "replace" },
                new () { Char = "test2", Replacement = "replace2" }
            };

            var settings = new RequestHandlerSettings { CharCollection = userCollection, EnableDefaultCharReplacements = false };
            var actual = settings.CharCollection.ToList();

            Assert.AreEqual(userCollection.Length, actual.Count);
            Assert.That(actual, Is.EquivalentTo(userCollection));
        }

        [Test]
        public void Given_CharCollection_That_OverridesDefaultValues_ReturnsReplacements()
        {
            var userCollection = new CharItem[]
            {
                new () { Char = "%", Replacement = "percent" },
                new () { Char = ".", Replacement = "dot" }
            };

            var settings = new RequestHandlerSettings { CharCollection = userCollection };
            var actual = settings.CharCollection.ToList();

            Assert.AreEqual(RequestHandlerSettings.DefaultCharCollection.Length, actual.Count);

            Assert.That(actual, Has.Exactly(1).Matches<CharItem>(x => x.Char == "%" && x.Replacement == "percent"));
            Assert.That(actual, Has.Exactly(1).Matches<CharItem>(x => x.Char == "." && x.Replacement == "dot"));
            Assert.That(actual, Has.Exactly(0).Matches<CharItem>(x => x.Char == "%" && x.Replacement == string.Empty));
            Assert.That(actual, Has.Exactly(0).Matches<CharItem>(x => x.Char == "." && x.Replacement == string.Empty));
        }

        [Test]
        public void Given_CharCollection_That_OverridesDefaultValues_And_ContainsNew_ReturnsMergedWithReplacements()
        {
            var userCollection = new CharItem[]
            {
                new () { Char = "%", Replacement = "percent" },
                new () { Char = ".", Replacement = "dot" },
                new () { Char = "new", Replacement = "new" }
            };

            var settings = new RequestHandlerSettings { CharCollection = userCollection };
            var actual = settings.CharCollection.ToList();

            // Add 1 to the length, because we're expecting to only add one new one
            Assert.AreEqual(RequestHandlerSettings.DefaultCharCollection.Length + 1, actual.Count);

            Assert.That(actual, Has.Exactly(1).Matches<CharItem>(x => x.Char == "%" && x.Replacement == "percent"));
            Assert.That(actual, Has.Exactly(1).Matches<CharItem>(x => x.Char == "." && x.Replacement == "dot"));
            Assert.That(actual, Has.Exactly(1).Matches<CharItem>(x => x.Char == "new" && x.Replacement == "new"));
            Assert.That(actual, Has.Exactly(0).Matches<CharItem>(x => x.Char == "%" && x.Replacement == string.Empty));
            Assert.That(actual, Has.Exactly(0).Matches<CharItem>(x => x.Char == "." && x.Replacement == string.Empty));
        }
    }
}