using System.IO;
using System.Threading.Tasks;
using CliFx.Infrastructure;
using DiscordChatExporter.Cli.Commands;
using DiscordChatExporter.Cli.Tests.Fixtures;
using DiscordChatExporter.Cli.Tests.Infra;
using DiscordChatExporter.Cli.Tests.TestData;
using DiscordChatExporter.Core.Exporting;
using DiscordChatExporter.Core.Exporting.Partitioning;
using FluentAssertions;
using Xunit;

namespace DiscordChatExporter.Cli.Tests.Specs
{
    public record PartitioningSpecs(TempOutputFixture TempOutput) : IClassFixture<TempOutputFixture>
    {
        [Fact]
        public async Task Messages_partitioned_by_count_are_split_into_multiple_files_correctly()
        {
            // Arrange
            var filePath = TempOutput.GetTempFilePath();
            var fileNameWithoutExt = Path.GetFileNameWithoutExtension(filePath);
            var dirPath = Path.GetDirectoryName(filePath) ?? Directory.GetCurrentDirectory();

            // Act
            await new ExportChannelsCommand
            {
                TokenValue = Secrets.DiscordToken,
                IsBotToken = Secrets.IsDiscordTokenBot,
                ChannelIds = new[] { ChannelIds.DateRangeTestCases },
                ExportFormat = ExportFormat.HtmlDark,
                OutputPath = filePath,
                PartitionLimit = PartitionLimit.Parse("3")
            }.ExecuteAsync(new FakeConsole());

            // Assert
            Directory.EnumerateFiles(dirPath, fileNameWithoutExt + "*")
                .Should()
                .HaveCount(3);
        }

        [Fact]
        public async Task Messages_partitioned_by_file_size_are_split_into_multiple_files_correctly()
        {
            // Arrange
            var filePath = TempOutput.GetTempFilePath();
            var fileNameWithoutExt = Path.GetFileNameWithoutExtension(filePath);
            var dirPath = Path.GetDirectoryName(filePath) ?? Directory.GetCurrentDirectory();

            // Act
            await new ExportChannelsCommand
            {
                TokenValue = Secrets.DiscordToken,
                IsBotToken = Secrets.IsDiscordTokenBot,
                ChannelIds = new[] { ChannelIds.DateRangeTestCases },
                ExportFormat = ExportFormat.HtmlDark,
                OutputPath = filePath,
                PartitionLimit = PartitionLimit.Parse("20kb")
            }.ExecuteAsync(new FakeConsole());

            // Assert
            Directory.EnumerateFiles(dirPath, fileNameWithoutExt + "*")
                .Should()
                .HaveCount(2);
        }
    }
}