using Luski.net.Enums;
using Luski.net.Interfaces;
using Luski.net.JsonTypes.BaseTypes;
using System.Collections.Generic;
using System;
using System.Text.Json.Serialization;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;
using Luski.net.JsonTypes.WSS;
using System.Text.Json.Serialization.Metadata;

namespace Luski.net.JsonTypes;

public class SocketChannel : IncomingHTTP
{
    [JsonInclude]
    [JsonPropertyName("id")]
    public long Id { get; internal set; } = default!;
    [JsonInclude]
    [JsonPropertyName("title")]
    public string Title { get; internal set; } = default!;
    [JsonInclude]
    [JsonPropertyName("description")]
    public string Description { get; internal set; } = default!;
    [JsonInclude]
    [JsonPropertyName("key")]
    public string Key { get; internal set; } = default!;
    [JsonPropertyName("type")]
    [JsonInclude]
    public ChannelType Type { get; internal set; } = default!;
    [JsonPropertyName("members")]
    [JsonInclude]
    public long[] MemberIdList { get; internal set; } = default!;
    [JsonIgnore]
    public IReadOnlyList<IUser> Members
    {
        get
        {
            if (MemberIdList is null || MemberIdList.Length == 0) return Array.Empty<IUser>().ToList().AsReadOnly();
            if (_members is null || !_members.Any())
            {
                _members = new();
                foreach (long member in MemberIdList)
                {
                    if (member != Server._user!.Id) _members.Add(SocketUserBase.GetUser(member, SocketRemoteUserContext.Default.SocketRemoteUser).Result);
                    else _members.Add(Server._user);
                }
            }
            return _members.AsReadOnly();
        }
    }
    [JsonIgnore]
    private List<IUser> _members = new();

    public async Task<Task> SendKeysToUsers()
    {
        if (Key is null)
        {
            StartKeyProcessAsync().Wait();
            return Task.CompletedTask;
        }
        int num = Convert.ToInt32(Math.Ceiling((Environment.ProcessorCount * Server.Percent) * 2.0));
        if (num == 0) num = 1;
        string? lkey = Encryption.File.Channels.GetKey(Id);
        Parallel.ForEach(Members, new ParallelOptions()
        {
            MaxDegreeOfParallelism = num
        }, async i =>
        {
            if (i.Id != Server._user?.Id)
            {
                string key = await i.GetUserKey();
                if (!string.IsNullOrEmpty(key))
                {
                    WSSKeyExchange send = new()
                    {
                        to = i.Id,
                        channel = Id,
                        key = Convert.ToBase64String(Encryption.Encrypt(lkey, key))
                    };
                    Server.SendServer(send, WSSKeyExchangeContext.Default.WSSKeyExchange);
                }
            }
        });
        return Task.CompletedTask;
    }

    internal async Task StartKeyProcessAsync()
    {
        Encryption.GenerateNewKeys(out string Public, out string Private);
        Key = Public;
        HttpResponseMessage b;
        using (HttpClient web = new())
        {
            web.DefaultRequestHeaders.Add("token", Server.Token);
            b = web.PostAsync($"https://{Server.InternalDomain}/{Server.API_Ver}/SocketChannel/SetKey/{Id}", new StringContent(Key)).Result;
        }
        int num = Convert.ToInt32(Math.Ceiling((Environment.ProcessorCount * Server.Percent) * 2.0));
        if (num == 0) num = 1;
        Encryption.File.Channels.AddKey(Id, Private);
        Parallel.ForEach(Members, new ParallelOptions()
        {
            MaxDegreeOfParallelism = num
        }, i =>
        {
            if (i.Id != Server._user?.Id)
            {
                string key = i.GetUserKey().Result;
                if (!string.IsNullOrEmpty(key))
                {
                    WSSKeyExchange send = new()
                    {
                        to = i.Id,
                        channel = Id,
                        key = Convert.ToBase64String(Encryption.Encrypt(Private, key))
                    };
                    Server.SendServer(send, WSSKeyExchangeContext.Default.WSSKeyExchange);
                }
            }
        });
    }

    internal static async Task<TChannel> GetChannel<TChannel>(long id, JsonTypeInfo<TChannel> Json) where TChannel : SocketChannel, new()
    {
        TChannel request;
        if (Server.chans is null) Server.chans = new();
        if (Server.chans.Count > 0 && Server.chans.Any(s => s.Id == id))
        {
            return Server.chans.Where(s => s is TChannel && s.Id == id).Cast<TChannel>().FirstOrDefault()!;
        }
        while (true)
        {
            if (Server.CanRequest)
            {
                request = await Server.GetFromServer($"SocketChannel/Get/{id}", Json);
                break;
            }
        }
        if (request is null) throw new Exception("Something was wrong with the server responce");
        if (request.Error is null)
        {
            if (Server.chans is null) Server.chans = new();
            if (Server.chans.Count > 0 && Server.chans.Any(s => s.Id == request.Id))
            {
                foreach (SocketChannel? p in Server.chans.Where(s => s.Id == request.Id))
                {
                    Server.chans.Remove(p);
                }
            }
            Server.chans.Add(request);
            return request;
        }
        throw request.Error switch
        {
            ErrorCode.InvalidToken => new Exception("Your current token is no longer valid"),
            ErrorCode.Forbidden => new Exception("The server rejected your request"),
            ErrorCode.ServerError => new Exception("Error from server: " + request.ErrorMessage),
            ErrorCode.InvalidURL or ErrorCode.MissingHeader => new Exception(request.ErrorMessage),
            _ => new Exception($"Unknown data: '{request.ErrorMessage}'"),
        };
    }
}

[JsonSerializable(typeof(SocketChannel))]
[JsonSourceGenerationOptions(
    GenerationMode = JsonSourceGenerationMode.Default,
    PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase,
    WriteIndented = false)]
internal partial class SocketChannelContext : JsonSerializerContext
{

}