using System.Collections.Generic;
using System.Linq;

using MfGames.Gallium;
using MfGames.Nitride.Contents;
using MfGames.Nitride.Markdown;
using MfGames.Nitride.Tests;
using MfGames.TestSetup;

using Xunit;
using Xunit.Abstractions;

namespace MfGames.Nitride.Slugs.Tests;

/// <summary>
/// Tests the functionality of the WriteFiles().
/// </summary>
public class MakeSingleLinkListItemsTests : TestBase<MarkdownTestContext>
{
    public MakeSingleLinkListItemsTests(ITestOutputHelper output)
        : base(output)
    {
    }

    [Fact]
    public void AlreadyFullMarkdownLink()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input = new()
        {
            new Entity()
                .Set(IsMarkdown.Instance)
                .SetTextContent("- [Empty](link)"),
        };
        MakeSingleLinkListItems?
            op = context.Resolve<MakeSingleLinkListItems>();
        IEnumerable<Entity> output = op.Run(input);
        string content = output.First().GetText()!.Trim();

        Assert.Equal("- [Empty](link)", content);
    }

    [Fact]
    public void ExtendSingleMarkdownLink()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input = new()
        {
            new Entity()
                .Set(IsMarkdown.Instance)
                .SetTextContent("- [Empty](link) space"),
        };
        MakeSingleLinkListItems?
            op = context.Resolve<MakeSingleLinkListItems>();
        IEnumerable<Entity> output = op.Run(input);
        string content = output.First().GetText()!.Trim();

        Assert.Equal("- [Empty space](link)", content);
    }

    [Fact]
    public void NoLinksNoChange()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input = new()
        {
            new Entity()
                .Set(IsMarkdown.Instance)
                .SetTextContent("- Empty"),
        };
        MakeSingleLinkListItems?
            op = context.Resolve<MakeSingleLinkListItems>();
        IEnumerable<Entity> output = op.Run(input);
        string content = output.First().GetText()!.Trim();

        Assert.Equal("- Empty", content);
    }

    [Fact]
    public void RemoveSecondMarkdownLink()
    {
        using MarkdownTestContext context = this.CreateContext();

        List<Entity> input = new()
        {
            new Entity()
                .Set(IsMarkdown.Instance)
                .SetTextContent("- [Empty](link) [space](link2)"),
        };
        MakeSingleLinkListItems?
            op = context.Resolve<MakeSingleLinkListItems>();
        IEnumerable<Entity> output = op.Run(input);
        string content = output.First().GetText()!.Trim();

        Assert.Equal("- [Empty space](link)", content);
    }
}