using FFMpegCore.Builders.MetaData;

using Microsoft.VisualStudio.TestTools.UnitTesting;

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace FFMpegCore.Test
{
    [TestClass]
    public class MetaDataBuilderTests
    {
        [TestMethod]
        public void TestMetaDataBuilderIntegrity()
        {
            var source = new
            {
                Album = "Kanon und Gigue",
                Artist = "Pachelbel",
                Title = "Kanon und Gigue in D-Dur",
                Copyright = "Copyright Lol",
                Composer = "Pachelbel",
                Genres = new[] { "Synthwave", "Classics" },
                Tracks = new[]
                {
                    new { Duration = TimeSpan.FromSeconds(10), Title = "Chapter 01" },
                    new { Duration = TimeSpan.FromSeconds(10), Title = "Chapter 02" },
                    new { Duration = TimeSpan.FromSeconds(10), Title = "Chapter 03" },
                    new { Duration = TimeSpan.FromSeconds(10), Title = "Chapter 04" },
                }
            };

            var builder = new MetaDataBuilder()
                .WithTitle(source.Title)
                .WithArtists(source.Artist)
                .WithComposers(source.Composer)
                .WithAlbumArtists(source.Artist)
                .WithGenres(source.Genres)
                .WithCopyright(source.Copyright)
                .AddChapters(source.Tracks, x => (x.Duration, x.Title));

            var metadata = builder.Build();
            var serialized = MetaDataSerializer.Instance.Serialize(metadata);

            Assert.IsTrue(serialized.StartsWith(";FFMETADATA1", StringComparison.OrdinalIgnoreCase));
            Assert.IsTrue(serialized.Contains("genre=Synthwave; Classics", StringComparison.OrdinalIgnoreCase));
            Assert.IsTrue(serialized.Contains("title=Chapter 01", StringComparison.OrdinalIgnoreCase));
            Assert.IsTrue(serialized.Contains("album_artist=Pachelbel", StringComparison.OrdinalIgnoreCase));
        }

        [TestMethod]
        public void TestMapMetadata()
        {
            //-i "whaterver0" // index: 0
            //-f concat -safe 0
            //-i "\AppData\Local\Temp\concat_b511f2bf-c4af-4f71-b9bd-24d706bf4861.txt"   // index: 1
            //-i "\AppData\Local\Temp\metadata_210d3259-3d5c-43c8-9786-54b5c414fa70.txt" // index: 2
            //-map_metadata 2

            var text0 = FFMpegArguments.FromFileInput("whaterver0")
                .AddMetaData("WhatEver3")
                .Text;

            var text1 = FFMpegArguments.FromFileInput("whaterver0")
                .AddDemuxConcatInput(new[] { "whaterver", "whaterver1" })
                .AddMetaData("WhatEver3")
                .Text;



            Assert.IsTrue(Regex.IsMatch(text0, "metadata_[0-9a-f-]+\\.txt\" -map_metadata 1"), "map_metadata index is calculated incorrectly.");
            Assert.IsTrue(Regex.IsMatch(text1, "metadata_[0-9a-f-]+\\.txt\" -map_metadata 2"), "map_metadata index is calculated incorrectly.");
        }
    }
}