using System;
using System.Collections.Generic;
using Paca.Browser;
using Paca.Browser.Content;
using Xunit;

namespace Paca.Tests.Browser;

public class BrowserContentAndRoutingExtremeRedTests
{
    // ==========================================
    // 1. ChromeInternalUrlRouter
    // ==========================================

    [Theory]
    [InlineData("chrome://settings?category=privacy", ChromeInternalAction.Settings)]
    [InlineData("chrome://downloads?q=paca", ChromeInternalAction.Downloads)]
    [InlineData("chrome://history#search", ChromeInternalAction.History)]
    [InlineData("chrome:///settings", ChromeInternalAction.Settings)]
    [InlineData("paca://extensions?id=123", ChromeInternalAction.Extensions)]
    [InlineData("chrome://settings/content?site=example.com", ChromeInternalAction.SiteSettings)]
    [InlineData("chrome://clear-browsing-data?time=all", ChromeInternalAction.ClearBrowsingData)]
    public void ChromeInternalUrlRouter_Route_WithQueryOrFragment_ResolvesActionCorrectly(string url, ChromeInternalAction expected)
    {
        var action = ChromeInternalUrlRouter.Route(url);
        Assert.Equal(expected, action);
    }

    // ==========================================
    // 2. DualSubtitleEngine
    // ==========================================

    [Theory]
    [InlineData(double.NaN)]
    [InlineData(double.NegativeInfinity)]
    [InlineData(double.PositiveInfinity)]
    [InlineData(-1.0)]
    public void DualSubtitleEngine_GetDualCues_InvalidTimestamp_ReturnsNull(double timestamp)
    {
        var engine = new DualSubtitleEngine();
        var cues = engine.GetDualCues(timestamp);
        Assert.Null(cues);
    }

    [Fact]
    public void DualSubtitleEngine_RegisterAudioTrack_NullOrDuplicate_HandledSafely()
    {
        var engine = new DualSubtitleEngine();
        engine.RegisterAudioTrack(null!);
        Assert.Empty(engine.AudioTracks);

        var track1 = new AudioTrackInfo(1, "ko", "한국어", true);
        var track1Duplicate = new AudioTrackInfo(1, "ko-alt", "한국어 더빙", false);

        engine.RegisterAudioTrack(track1);
        engine.RegisterAudioTrack(track1Duplicate);

        Assert.Single(engine.AudioTracks);
        Assert.Equal(1, engine.SelectedAudioTrackId);
    }

    // ==========================================
    // 3. LiveCaptionEngine
    // ==========================================

    [Theory]
    [InlineData(double.NaN)]
    [InlineData(-10.0)]
    public void LiveCaptionEngine_GetActiveCue_InvalidTimestamp_ReturnsNull(double timestamp)
    {
        var engine = new LiveCaptionEngine();
        var cue = engine.GetActiveCue(timestamp);
        Assert.Null(cue);
    }

    // ==========================================
    // 4. MhtmlWebArchivePackager
    // ==========================================

    [Fact]
    public void MhtmlWebArchivePackager_Package_NullRequest_ThrowsArgumentNullException()
    {
        var packager = new MhtmlWebArchivePackager();
        Assert.Throws<ArgumentNullException>(() => packager.Package(null!));
    }

    [Fact]
    public void MhtmlWebArchivePackager_Package_NullResourcesOrData_PackagesWithoutCrashing()
    {
        var packager = new MhtmlWebArchivePackager();
        var req = new WebArchivePackageRequest(
            Url: "https://example.com",
            Title: "Test Page",
            HtmlContent: "<html><body>Hello</body></html>",
            Resources: new List<WebArchiveResource>
            {
                new("https://example.com/null.png", "image/png", null!),
                null!
            }
        );

        var mhtml = packager.Package(req);
        Assert.NotNull(mhtml);
        Assert.Contains("Hello", mhtml);
    }
}