using System;
using Paca.Mobile.Core;
using Xunit;

namespace Paca.Tests.Core;

public class MediaFileNameTemplateGateTests
{
    [Fact]
    public void Gate361_MediaFileNameTemplate_SubstitutesTokens_Accurately()
    {
        var ctx = new MediaTemplateContext
        {
            Title = "Rolling in the Deep",
            Artist = "Adele",
            Channel = "AdeleVEVO",
            Domain = "youtube.com",
            Resolution = "1080p",
            UploadDate = new DateTime(2010, 11, 30),
            TrackNumber = 1
        };

        var template = "[{domain}] {artist} - {title} ({resolution})";
        var result = MediaFileNameTemplateEngine.FormatFileName(template, ctx);

        Assert.Equal("[youtube.com] Adele - Rolling in the Deep (1080p)", result);
    }

    [Fact]
    public void Gate362_MediaFileNameTemplate_HandlesNullTokens_Gracefully()
    {
        var ctx = new MediaTemplateContext
        {
            Title = "Solo Track",
            Artist = null,
            Resolution = null
        };

        var template = "{artist} - {title} [{resolution}]";
        var result = MediaFileNameTemplateEngine.FormatFileName(template, ctx);

        // Null tokens are omitted or stripped cleanly
        Assert.Equal("Solo Track", result);
    }

    [Fact]
    public void Gate363_MediaFileNameTemplate_SanitizesIllegalCharacters()
    {
        var dirty = "Who: Are / You * In <Wonderland>? | Check \"This\"";
        var clean = MediaFileNameTemplateEngine.SanitizePathSegment(dirty);

        Assert.DoesNotContain(":", clean);
        Assert.DoesNotContain("/", clean);
        Assert.DoesNotContain("*", clean);
        Assert.DoesNotContain("<", clean);
        Assert.DoesNotContain(">", clean);
        Assert.DoesNotContain("?", clean);
        Assert.DoesNotContain("|", clean);
        Assert.DoesNotContain("\"", clean);
    }

    [Fact]
    public void Gate364_MediaFileNameTemplate_TruncatesExcessiveLength_PreservingFormat()
    {
        var longTitle = new string('A', 300);
        var ctx = new MediaTemplateContext { Title = longTitle };

        var formatted = MediaFileNameTemplateEngine.FormatFileName("{title}", ctx, maxLength: 50);

        Assert.Equal(50, formatted.Length);
        Assert.StartsWith("AAAA", formatted);
    }
}