using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json.Serialization.Metadata;
using System.Threading;
using System.Threading.Tasks;
using Luski.net.Enums;
using Luski.net.Interfaces;
using Luski.net.JsonTypes.BaseTypes;
using Luski.net.JsonTypes.HTTP;
using Luski.net.Structures.Main;
using Luski.net.Structures.Public;

namespace Luski.net;

public partial class MainServer : Server
{
    public MainSocketAppUser User { get; internal set; } = default!;
    
    public async Task<TChannel> GetChannel<TChannel>(long Channel, CancellationToken CancellationToken) where TChannel : MainSocketChannel, new()
    {
        TChannel Return = new();
        switch (Return)
        {
            case MainSocketDMChannel:
                Return = (await GetChannel(Channel, MainSocketDMChannelContext.Default.MainSocketDMChannel, CancellationToken) as TChannel)!;
                break;
            case MainSocketGroupChannel:
                Return = (await GetChannel(Channel, MainSocketGroupChannelContext.Default.MainSocketGroupChannel, CancellationToken) as TChannel)!;
                break;
            case MainSocketTextChannel:
                Return = (await GetChannel(Channel, MainSocketTextChannelContext.Default.MainSocketTextChannel, CancellationToken) as TChannel)!;
                break;
            case MainSocketChannel:
                Return = (await GetChannel(Channel, MainSocketChannelContext.Default.MainSocketChannel, CancellationToken) as TChannel)!;
                break;
            case null:
                throw new NullReferenceException(nameof(TChannel));
            default:
                throw new Exception("Unknown channel type");
        }
        return Return;
    }
    
    internal async Task<TChannel> GetChannel<TChannel>(long id, JsonTypeInfo<TChannel> Json, CancellationToken CancellationToken) where TChannel : MainSocketChannel, new()
    {
        TChannel request;
        if (chans.Count > 0 && chans.Any(s => s.Id == id))
        {
            return chans.Where(s => s is TChannel && s.Id == id).Cast<TChannel>().FirstOrDefault()!;
        }
        while (true)
        {
            if (CanRequest)
            {
                request = await GetFromServer($"SocketChannel/Get/{id}", Json, CancellationToken);
                break;
            }
        }
        if (request is null) throw new Exception("Something was wrong with the server responce");
        if (request.Error is null)
        {
            if (chans.Count > 0 && chans.Any(s => s.Id == request.Id))
            {
                foreach (MainSocketChannel? p in chans.Where(s => s.Id == request.Id))
                {
                    chans.Remove(p);
                }
            }
            chans.Add(request);
            return request;
        }
        throw request.Error switch
        {
            ErrorCode.InvalidToken => new Exception("Your current token is no longer valid"),
            ErrorCode.Forbidden => new Exception("The server rejected your request"),
            ErrorCode.ServerError => new Exception("Error from server: " + request.ErrorMessage),
            ErrorCode.InvalidURL or ErrorCode.MissingHeader => new Exception(request.ErrorMessage),
            _ => new Exception($"Unknown data: '{request.ErrorMessage}'"),
        };
    }
    
    public Task<Tuser> GetUser<Tuser>(long UserID, CancellationToken CancellationToken) where Tuser : MainSocketUserBase, new()
    {
        Tuser user = new();
        switch (user)
        {
            case MainSocketAppUser:
                user = (GetUser(UserID, MainSocketAppUserContext.Default.MainSocketAppUser, CancellationToken).Result as Tuser)!;
                break;
            case MainSocketUserBase:
                user = (GetUser(UserID, MainSocketUserBaseContext.Default.MainSocketUserBase, CancellationToken).Result as Tuser)!;
                break;
            case null:
                throw new NullReferenceException(nameof(Tuser));
            default:
                throw new Exception("Unknown channel type");
        }

        return Task.FromResult(user);
    }
    
    public async Task<MainSocketMessage> GetMessage(long id, CancellationToken CancellationToken)
    {
        MainSocketMessage message;
        while (true)
        {
            if (CanRequest)
            {
                message = await GetFromServer("socketmessage",
                    MainSocketMessageContext.Default.MainSocketMessage,
                    CancellationToken,
                    new System.Collections.Generic.KeyValuePair<string, string?>("msg_id", id.ToString()));
                break;
            }
        }
        if (message is not null) return message;
        throw new Exception("Server did not return a message");
    }
    
    /// <summary>
    /// Sends the server a request to update the <paramref name="Status"/> of you account
    /// </summary>
    /// <param name="Status">The <see cref="UserStatus"/> you want to set your status to</param>
    /// <exception cref="Exception"></exception>
    public async Task<Task> UpdateStatus(UserStatus Status, CancellationToken CancellationToken)
    {
        IncomingHTTP? data = await SendServer("SocketUserProfile/Status", new Status() { UserStatus = Status }, StatusContext.Default.Status, IncomingHTTPContext.Default.IncomingHTTP, CancellationToken);
        if (data.Error is not null && ((int)data.StatusCode < 200 || (int)data.StatusCode > 299))
        {
            if (data?.ErrorMessage is not null) throw new Exception(data.ErrorMessage);
            if (data?.Error is not null) throw new Exception(((int)data.Error).ToString());
            else throw new Exception("Something went worng");
        }

        User.Status = Status;
        return Task.CompletedTask;
    }
    
    internal async Task<Tuser> GetUser<Tuser>(long UserId, JsonTypeInfo<Tuser> Json, CancellationToken CancellationToken) where Tuser : MainSocketUserBase, new()
    {
        Tuser user;
        if (poeople.Count > 0 && poeople.Any(s => s.Id == UserId))
        {
            Tuser temp = poeople.Where(s => s is Tuser && s.Id == UserId).Cast<Tuser>().FirstOrDefault()!;
            return temp;
        }
        while (true)
        {
            if (CanRequest)
            {
                user = await GetFromServer("socketuser",
                    Json,
                    CancellationToken,
                    new KeyValuePair<string, string?>("id", UserId.ToString()));
                break;
            }
        }

        if (user is null) throw new Exception("Server did not return a user");
        if (poeople.Count > 0 && poeople.Any(s => s.Id == UserId))
        {
            foreach (IUser? p in poeople.Where(s => s.Id == UserId))
            {
                poeople.Remove(p);
            }
        }
        poeople.Add(user);
        return user;
    }
}