using System.Text;
using Ludarium.Application;
using Ludarium.Domain;

namespace Ludarium.UnitTests;

public sealed class BrowserGameDataPolicyTests
{
    [Fact]
    public void VerifiedBindingMatchesOnlyTheExactArtifactRevisionAndCore()
    {
        var gameId = Guid.NewGuid();
        var artifactId = Guid.NewGuid();
        var sha256 = new string('a', 64);
        var artifact = Artifact(artifactId, version: 4, sha256: sha256);
        var session = Session(gameId, artifactId, "fceumm");
        var sourceId = BrowserGameDataPolicy.EncodeBinding(artifactId, artifact.Version, session.Core, sha256);

        Assert.True(BrowserGameDataPolicy.Matches(BrowserGameDataPolicy.SourceType, sourceId, session, artifact));
        Assert.False(BrowserGameDataPolicy.Matches("ManualUpload", sourceId, session, artifact));
        Assert.False(BrowserGameDataPolicy.Matches(BrowserGameDataPolicy.SourceType, "not-base64", session, artifact));
        Assert.False(BrowserGameDataPolicy.Matches(BrowserGameDataPolicy.SourceType, sourceId,
            session with { Core = "mgba" }, artifact));
        Assert.False(BrowserGameDataPolicy.Matches(BrowserGameDataPolicy.SourceType, sourceId, session,
            artifact with { Version = artifact.Version + 1 }));
        Assert.False(BrowserGameDataPolicy.Matches(BrowserGameDataPolicy.SourceType, sourceId, session,
            artifact with { Sha256 = new string('b', 64) }));
    }

    [Fact]
    public void RestoreScopeIsFixtureVerifiedAndStableAcrossCoreCasing()
    {
        var gameId = Guid.NewGuid();

        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("FCEUMM"));
        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("mgba"));
        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("gambatte"));
        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("snes9x"));
        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("melonds"));
        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("ppsspp"));
        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("pcsx_rearmed"));
        Assert.True(BrowserGameDataPolicy.SupportsAutomaticRestore("n64wasm"));
        Assert.False(BrowserGameDataPolicy.SupportsAutomaticRestore("mupen64plus_next"));
        Assert.Equal(BrowserGameDataPolicy.StableEntryId(gameId, "fceumm", GameDataKind.Save),
            BrowserGameDataPolicy.StableEntryId(gameId, "FCEUMM", GameDataKind.Save));
        Assert.NotEqual(BrowserGameDataPolicy.StableEntryId(gameId, "fceumm", GameDataKind.Save),
            BrowserGameDataPolicy.StableEntryId(gameId, "fceumm", GameDataKind.SaveState));
        Assert.Throws<ArgumentException>(() =>
            BrowserGameDataPolicy.EncodeBinding(Guid.NewGuid(), 1, "mupen64plus_next", null));
    }

    private static Artifact Artifact(Guid id, long version, string sha256) =>
        new(id, Guid.NewGuid(), "roms/nes/synthetic.nes", 16, DateTimeOffset.UnixEpoch,
            ArtifactState.Present, MediaType.Rom, Confidence.High, null, DateTimeOffset.UnixEpoch,
            DateTimeOffset.UnixEpoch, "ines", "nes", version, sha256);

    private static BrowserPlaySession Session(Guid gameId, Guid artifactId, string core) =>
        new(Guid.NewGuid(), gameId, artifactId, PlaySessionState.Ready, "nes", "Ludarium EmulatorJS",
            core, "/player.html", Convert.ToHexString(Encoding.UTF8.GetBytes("token")),
            DateTimeOffset.UnixEpoch, DateTimeOffset.UnixEpoch.AddHours(1));
}