using System;
using System.Collections.Generic;
using System.Security.Cryptography;
using System.Threading;
using FrostFS.SDK.ModelsV2;
using FrostFS.SDK.Cryptography;
using Google.Protobuf;
using Grpc.Core.Interceptors;

namespace FrostFS.SDK.ClientV2;

public class Context()
{
    private List<Interceptor>? interceptors;

    private ByteString publicKeyCache;

    public ECDsa Key { get; set; }

    public OwnerId OwnerId { get; set; }

    public ModelsV2.Version Version { get; set; }

    public CancellationToken CancellationToken { get; set; } = default;
    
    public TimeSpan Timeout { get; set; } = default;
    
    public DateTime? Deadline => Timeout.Ticks > 0 ? DateTime.UtcNow.Add(Timeout) : null;

    public Action<CallStatistics>? Callback { get; set; }

    public List<Interceptor> Interceptors
    {
        get { return this.interceptors ??= []; }
        set { this.interceptors = value; }
    }

    public ByteString PublicKeyCache 
    { 
        get
        {
            if (publicKeyCache == null)
            {
                publicKeyCache = ByteString.CopyFrom(Key.PublicKey());
            }

            return publicKeyCache;
        }
    }
}