using CTA.WebForms.Helpers;
using HtmlAgilityPack;
using NUnit.Framework;

namespace CTA.WebForms.Tests.Helpers
{
    public class UtilitiesTests
    {
        [Test]
        public void NormalizeNamespaceIdentifier_Prepends_Underscore_For_Invalid_Start()
        {
            var input = "0TestNamespace.SubNamespace";
            var expectedOutput = "_0TestNamespace.SubNamespace";
            var output = Utilities.NormalizeNamespaceIdentifier(input);

            Assert.AreEqual(expectedOutput, output);
        }

        [Test]
        public void NormalizeNamespaceIdentifier_Removes_Invalid_Characters()
        {
            var input = "Test$Na!me^sp~ace@2@.##Sub*Namespace##";
            var expectedOutput = "TestNamespace2.SubNamespace";
            var output = Utilities.NormalizeNamespaceIdentifier(input);

            Assert.AreEqual(expectedOutput, output);
        }

        [Test]
        public void NormalizeNamespaceIdentifier_Removes_Double_Periods()
        {
            var input = "TestNamespace3..SubNamespace........SubSubNamespace";
            var expectedOutput = "TestNamespace3.SubNamespace.SubSubNamespace";
            var output = Utilities.NormalizeNamespaceIdentifier(input);

            Assert.AreEqual(expectedOutput, output);
        }

        [Test]
        public void NormalizeNamespaceIdentifier_Removes_Double_Periods_Created_By_Invalid_Character_Removal()
        {
            var input = "TestNamespace4.$.SubNamespace...@..###..%.SubSubNamespace";
            var expectedOutput = "TestNamespace4.SubNamespace.SubSubNamespace";
            var output = Utilities.NormalizeNamespaceIdentifier(input);

            Assert.AreEqual(expectedOutput, output);
        }

        [Test]
        public void NormalizeNamespaceIdentifier_Replaces_Hyphens_With_Underscores()
        {
            var input = "TestNamespace-5.Sub--Namespace.Sub--Sub--Namespace";
            var expectedOutput = "TestNamespace_5.Sub__Namespace.Sub__Sub__Namespace";
            var output = Utilities.NormalizeNamespaceIdentifier(input);

            Assert.AreEqual(expectedOutput, output);
        }

        [Test]
        public void NormalizeNamespaceIdentifier_Replaces_Spaces_With_Underscores()
        {
            var input = "TestNamespace 6.Sub  Namespace.Sub  Sub  Namespace";
            var expectedOutput = "TestNamespace_6.Sub__Namespace.Sub__Sub__Namespace";
            var output = Utilities.NormalizeNamespaceIdentifier(input);

            Assert.AreEqual(expectedOutput, output);
        }

        [Test]
        public void NormalizeNamespaceIdentifier_Replaces_Mixed_Hyphens_And_Spaces_With_Underscores()
        {
            var input = "TestNamespace-7.Sub  Namespace.Sub- Sub -Namespace";
            var expectedOutput = "TestNamespace_7.Sub__Namespace.Sub__Sub__Namespace";
            var output = Utilities.NormalizeNamespaceIdentifier(input);

            Assert.AreEqual(expectedOutput, output);
        }

        [Test]
        public void NormalizeHtmlContent_Works_On_Html_With_No_New_Lines()
        {
            var input =
@"<div><h1>Section</h1><p> Section Content</p><div><h2>Sub-Section</h2><p>Sub-Section Content</p></div></div>";
            var expectedOutput =
@"<div>
    <h1>
        Section
    </h1>
    <p>
        Section Content
    </p>
    <div>
        <h2>
            Sub-Section
        </h2>
        <p>
            Sub-Section Content
        </p>
    </div>
</div>";

            var document = new HtmlDocument();
            var node = HtmlNode.CreateNode(input);
            document.DocumentNode.AppendChild(node);

            Utilities.NormalizeHtmlContent(document.DocumentNode);

            Assert.AreEqual(expectedOutput, document.DocumentNode.WriteTo().Trim());
        }

        [Test]
        public void NormalizeHtmlContent_Works_On_Super_Messy_Html()
        {
            var input =
@"<div><h1>Section
</h1>
                                 <p> Section Content</p><div><h2>Sub-Section</h2>
   <p>Sub-Section Content</p>    
    </div>
</div>";
            var expectedOutput =
@"<div>
    <h1>
        Section
    </h1>
    <p>
        Section Content
    </p>
    <div>
        <h2>
            Sub-Section
        </h2>
        <p>
            Sub-Section Content
        </p>
    </div>
</div>";

            var document = new HtmlDocument();
            var node = HtmlNode.CreateNode(input);
            document.DocumentNode.AppendChild(node);

            Utilities.NormalizeHtmlContent(document.DocumentNode);

            Assert.AreEqual(expectedOutput, document.DocumentNode.WriteTo().Trim());
        }

        [Test]
        public void NormalizeHtmlContent_Does_Nothing_To_Perfect_Html()
        {
            var input =
@"<div>
    <h1>
        Section
    </h1>
    <p>
        Section Content
    </p>
    <div>
        <h2>
            Sub-Section
        </h2>
        <p>
            Sub-Section Content
        </p>
    </div>
</div>";
            var expectedOutput =
@"<div>
    <h1>
        Section
    </h1>
    <p>
        Section Content
    </p>
    <div>
        <h2>
            Sub-Section
        </h2>
        <p>
            Sub-Section Content
        </p>
    </div>
</div>";

            var document = new HtmlDocument();
            var node = HtmlNode.CreateNode(input);
            document.DocumentNode.AppendChild(node);

            Utilities.NormalizeHtmlContent(document.DocumentNode);

            Assert.AreEqual(expectedOutput, document.DocumentNode.WriteTo().Trim());
        }
    }
}