using System.Net.Http;

namespace ClaudeDo.Releases.Tests;

public class SelfUpdaterAssetMatchingTests
{
    [Fact]
    public void FindInstallerAsset_PicksInstallerExeByPattern()
    {
        var assets = new[]
        {
            new ReleaseAsset("ClaudeDo-0.3.0-win-x64.zip", "https://x/app.zip", 10),
            new ReleaseAsset("ClaudeDo.Installer-0.3.0.exe", "https://x/inst.exe", 20),
            new ReleaseAsset("checksums.txt", "https://x/checks", 1),
        };

        var result = SelfUpdater.FindInstallerAsset(assets);

        Assert.NotNull(result);
        Assert.Equal("ClaudeDo.Installer-0.3.0.exe", result!.Asset.Name);
        Assert.Equal("0.3.0", result.Version);
    }

    [Fact]
    public void FindInstallerAsset_ReturnsNullWhenAbsent()
    {
        var assets = new[]
        {
            new ReleaseAsset("ClaudeDo-0.3.0-win-x64.zip", "https://x/app.zip", 10),
        };

        Assert.Null(SelfUpdater.FindInstallerAsset(assets));
    }

    [Fact]
    public void FindInstallerAsset_IgnoresAppZipThatContainsInstaller()
    {
        var assets = new[]
        {
            new ReleaseAsset("ClaudeDo.Installer.Portable-0.3.0.zip", "https://x/1", 1),
            new ReleaseAsset("not-the-installer.exe", "https://x/2", 1),
        };

        Assert.Null(SelfUpdater.FindInstallerAsset(assets));
    }
}

public class SelfUpdaterDecisionTests
{
    private sealed class FakeReleaseClient : IReleaseClient
    {
        public GiteaRelease? Release { get; set; }
        public bool Throw { get; set; }

        public Task<GiteaRelease?> GetLatestReleaseAsync(CancellationToken ct)
        {
            if (Throw) throw new HttpRequestException("boom");
            return Task.FromResult(Release);
        }

        public Task DownloadAsync(string url, string destPath, IProgress<long> progress, CancellationToken ct)
            => throw new NotSupportedException("not used in decision tests");
    }

    [Fact]
    public async Task Decide_NoRelease_NoUpdate()
    {
        var client = new FakeReleaseClient { Release = null };
        var d = await SelfUpdater.DecideUpdateAsync(client, currentVersion: "0.1.0", CancellationToken.None);
        Assert.Equal(SelfUpdateDecisionKind.NoUpdate, d.Kind);
    }

    [Fact]
    public async Task Decide_NetworkError_NoUpdate()
    {
        var client = new FakeReleaseClient { Throw = true };
        var d = await SelfUpdater.DecideUpdateAsync(client, "0.1.0", CancellationToken.None);
        Assert.Equal(SelfUpdateDecisionKind.NoUpdate, d.Kind);
    }

    [Fact]
    public async Task Decide_OlderLatest_NoUpdate()
    {
        var client = new FakeReleaseClient
        {
            Release = new GiteaRelease("v0.1.0", "rel", new[]
            {
                new ReleaseAsset("ClaudeDo.Installer-0.1.0.exe", "u", 1),
            }),
        };
        var d = await SelfUpdater.DecideUpdateAsync(client, "0.2.0", CancellationToken.None);
        Assert.Equal(SelfUpdateDecisionKind.NoUpdate, d.Kind);
    }

    [Fact]
    public async Task Decide_NewerLatestWithAsset_UpdateAvailable()
    {
        var client = new FakeReleaseClient
        {
            Release = new GiteaRelease("v0.3.0", "rel", new[]
            {
                new ReleaseAsset("ClaudeDo.Installer-0.3.0.exe", "https://x", 20),
                new ReleaseAsset("checksums.txt", "https://checks", 1),
            }),
        };
        var d = await SelfUpdater.DecideUpdateAsync(client, "0.2.0", CancellationToken.None);
        Assert.Equal(SelfUpdateDecisionKind.UpdateAvailable, d.Kind);
        Assert.Equal("0.3.0", d.LatestVersion);
        Assert.NotNull(d.InstallerAsset);
        Assert.NotNull(d.ChecksumsAsset);
    }

    [Fact]
    public async Task Decide_NewerLatestButNoInstallerAsset_NoUpdate()
    {
        var client = new FakeReleaseClient
        {
            Release = new GiteaRelease("v0.3.0", "rel", new[]
            {
                new ReleaseAsset("ClaudeDo-0.3.0-win-x64.zip", "u", 20),
            }),
        };
        var d = await SelfUpdater.DecideUpdateAsync(client, "0.2.0", CancellationToken.None);
        Assert.Equal(SelfUpdateDecisionKind.NoUpdate, d.Kind);
    }
}