using SVSim.EmulatedEntrypoint.Constants;
using SVSim.EmulatedEntrypoint.Security;
using SVSim.EmulatedEntrypoint.Services;

namespace SVSim.EmulatedEntrypoint.Middlewares;

/// <summary>
/// Maps an incoming request's session id to a udid if both are present.
/// </summary>
public class SessionidMappingMiddleware : IMiddleware
{
    private readonly ShadowverseSessionService _shadowverseSessionService;

    public SessionidMappingMiddleware(ShadowverseSessionService shadowverseSessionService)
    {
        _shadowverseSessionService = shadowverseSessionService;
    }

    public async Task InvokeAsync(HttpContext context, RequestDelegate next)
    {
        bool hasSessionId = context.Request.Headers.TryGetValue(NetworkConstants.UdidHeaderName, out var udid);
        bool hasUdid = context.Request.Headers.TryGetValue(NetworkConstants.SessionIdHeaderName, out var sid);
        if (hasSessionId && hasUdid)
        {
            _shadowverseSessionService.StoreUdidForSessionId(sid.FirstOrDefault(), Guid.Parse(Encryption.Decode(udid.FirstOrDefault())));
        }

        await next.Invoke(context);
    }
}