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

namespace Paca.Tests.Core;

public class BookmarkChapterExporterGateTests
{
    [Fact]
    public void Gate405_BookmarkChapterExporter_FormatsYoutubeTimestamps_Correctly()
    {
        // 45 seconds -> 00:45
        Assert.Equal("00:45", BookmarkChapterExporter.FormatYoutubeTimestamp(45.0));

        // 12 minutes 30 seconds -> 12:30
        Assert.Equal("12:30", BookmarkChapterExporter.FormatYoutubeTimestamp(750.0));

        // 1 hour 15 minutes 4 seconds -> 01:15:04
        Assert.Equal("01:15:04", BookmarkChapterExporter.FormatYoutubeTimestamp(4504.0));
    }

    [Fact]
    public void Gate406_BookmarkChapterExporter_ExportsYoutubeTimecodes_WithZeroStart()
    {
        var doc = new MediaBookmarkDocument("vid-1", "lecture.mp4");
        doc.Bookmarks.Add(new MediaBookmark("1", 150.0, "Introduction", null, "#FFF", DateTime.UtcNow));
        doc.Bookmarks.Add(new MediaBookmark("2", 600.0, "Main Content", null, "#FFF", DateTime.UtcNow));

        var text = BookmarkChapterExporter.ExportYoutubeTimecodes(doc);

        Assert.Contains("00:00 - 시작", text);
        Assert.Contains("02:30 - Introduction", text);
        Assert.Contains("10:00 - Main Content", text);
    }

    [Fact]
    public void Gate407_BookmarkChapterExporter_ExportsWebVttChapters_Accurately()
    {
        var doc = new MediaBookmarkDocument("vid-1", "podcast.mp4");
        doc.Bookmarks.Add(new MediaBookmark("1", 0.0, "Intro", null, "#FFF", DateTime.UtcNow));
        doc.Bookmarks.Add(new MediaBookmark("2", 120.0, "Discussion", null, "#FFF", DateTime.UtcNow));

        var vtt = BookmarkChapterExporter.ExportWebVttChapters(doc, totalDurationSec: 300.0);

        Assert.StartsWith("WEBVTT - Chapters", vtt.TrimStart());
        Assert.Contains("00:00:00.000 --> 00:02:00.000", vtt);
        Assert.Contains("Intro", vtt);
        Assert.Contains("00:02:00.000 --> 00:05:00.000", vtt);
        Assert.Contains("Discussion", vtt);
    }

    [Fact]
    public void Gate408_BookmarkChapterExporter_HandlesEmptyDocumentGracefully()
    {
        var emptyDoc = new MediaBookmarkDocument("vid-0", "empty.mp4");

        var yt = BookmarkChapterExporter.ExportYoutubeTimecodes(emptyDoc);
        Assert.Equal("00:00 - 시작", yt.Trim());

        var vtt = BookmarkChapterExporter.ExportWebVttChapters(emptyDoc, totalDurationSec: 60.0);
        Assert.Contains("00:00:00.000 --> 00:01:00.000", vtt);
    }
}