namespace MFiles.Grpc.Samples.Recipes;

/// <summary>
/// Recipe "connect": server version and capabilities before logging in, then log in, read the
/// session, keep it alive and log out.
/// </summary>
public static class Connect
{
    public static async Task RunAsync(MFilesSettings settings, string[] args)
    {
        // [START connect]
        // No session is needed for these calls.
        await using var connection = MFilesConnection.Open(settings);

        var versionService = new IRPCQueryVersion.IRPCQueryVersionClient(connection.CallInvoker);
        var version = await versionService.QueryVersionAsync(new QueryVersionRequest());
        Console.WriteLine($"Server version: {DecodeVersion(version.ServerVersion)}");

        var login = new IRPCLogin.IRPCLoginClient(connection.CallInvoker);
        var capabilities = (await login.GetServerCapabilitiesAsync(new GetServerCapabilitiesRequest()))
            .ServerCapabilities;
        Console.WriteLine($"Server capabilities: file_streaming={capabilities.FileStreaming}, " +
            $"facet_search={capabilities.FacetSearch}");

        var session = await connection.LogInAsync(settings, RecipeHelpers.ClientName);
        Console.WriteLine($"Logged in as {session.AccountName}; " +
            $"keep-alive interval {session.KeepAliveIntervalInSeconds} s");

        var info = (await login.GetVaultSessionInfoAsync(new GetVaultSessionInfoRequest())).VaultSessionInfo;
        Console.WriteLine($"Vault: {info.VaultDisplayName} {info.VaultGuid}");
        Console.WriteLine($"Metadata structure version: {connection.MetadataStructureVersion?.ToString() ?? "not reported"}");

        // A long-running program calls KeepAlive within the keep-alive interval.
        await login.KeepAliveAsync(new KeepAliveRequest());
        Console.WriteLine("KeepAlive: ok");

        await connection.LogOutAsync();
        Console.WriteLine("Logged out");
        // [END connect]
    }

    // [START decode-version]
    /// <summary>
    /// QueryVersion packs a version into 64 bits: major, minor, build and revision, 16 bits each.
    /// </summary>
    public static string DecodeVersion(ulong version) =>
        $"{version >> 48}.{(version >> 32) & 0xFFFF}.{(version >> 16) & 0xFFFF}.{version & 0xFFFF}";
    // [END decode-version]
}