using Luski.net.Enums;
using Luski.net.Interfaces;
using Luski.net.JsonTypes.BaseTypes;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Text.Json.Serialization;
using System.Threading.Tasks;

namespace Luski.net.JsonTypes;

public class SocketTextChannel : SocketChannel, ITextChannel
{
    public async Task<SocketMessage> GetMessage(long ID)
    {
        return await SocketMessage.GetMessage(ID);
    }

    public async Task<byte[]> GetPicture()
    {
        if (Type == ChannelType.DM) return Members.First().GetAvatar().Result;
        else
        {
            if (Server.Cache != null)
            {
                bool isc = System.IO.File.Exists($"{Server.Cache}/channels/{Id}");
                if (!isc) await Server.GetFromServer($"SocketChannel/GetPicture/{Id}", $"{Server.Cache}/channels/{Id}");
            }
            return System.IO.File.ReadAllBytes($"{Server.Cache}/channels/{Id}");
        }
    }

    public async Task<IReadOnlyList<SocketMessage>> GetMessages(long Message_Id, int count = 50)
    {
        if (count > 200)
        {
            throw new Exception("You can not request more than 200 messages at a time");
        }
        else if (count < 1)
        {
            throw new Exception("You must request at least 1 message");
        }
        else
        {
            SocketBulkMessage data = await Server.GetFromServer("SocketBulkMessage",
                SocketBulkMessageContext.Default.SocketBulkMessage,
                new KeyValuePair<string, string?>("channel_id", Id.ToString()),
                new KeyValuePair<string, string?>("messages", count.ToString()),
                new KeyValuePair<string, string?>("mostrecentid", Message_Id.ToString()));
            if (data.Error is null)
            {
                int num = Convert.ToInt32(Math.Ceiling((Environment.ProcessorCount * Server.Percent) * 2.0));
                if (num == 0) num = 1;

                string? key = Encryption.File.Channels.GetKey(Id);
                if (data is null) throw new Exception("Invalid data from server");
                if (data.Messages is null) data.Messages = Array.Empty<SocketMessage>();
                Parallel.ForEach(data.Messages, new ParallelOptions()
                {
                    MaxDegreeOfParallelism = num
                }, i =>
                {
                    i.decrypt(key);
                });
                key = null;
                return await Task.FromResult(data.Messages.ToList().AsReadOnly() as IReadOnlyList<SocketMessage>);
            }
            else
            {
                throw new Exception(data.ErrorMessage);
            }
        }
    }

    public async Task<IReadOnlyList<SocketMessage>> GetMessages(int count = 50)
    {
        try
        {
            if (count > 200)
            {
                throw new Exception("You can not request more than 200 messages at a time");
            }
            else if (count < 1)
            {
                throw new Exception("You must request at least 1 message");
            }
            else
            {
                SocketBulkMessage data = await Server.GetFromServer("SocketBulkMessage",
                    SocketBulkMessageContext.Default.SocketBulkMessage,
                    new KeyValuePair<string, string?>("id", Id.ToString()),
                    new KeyValuePair<string, string?>("messages", count.ToString()));
                if (data is not null && !data.Error.HasValue)
                {
                    int num = Convert.ToInt32(Math.Ceiling((Environment.ProcessorCount * Server.Percent) * 2.0));
                    if (num == 0) num = 1;
                    string? key = Encryption.File.Channels.GetKey(Id);
                    if (data.Messages is null) data.Messages = Array.Empty<SocketMessage>();
                    Parallel.ForEach(data.Messages, new ParallelOptions()
                    {
                        MaxDegreeOfParallelism = num
                    }, i =>
                    {
                        i.decrypt(key);
                    });
                    key = null;
                    return await Task.FromResult(data.Messages.ToList().AsReadOnly() as IReadOnlyList<SocketMessage>);
                }
                else
                {
                    throw data?.Error switch
                    {
                        ErrorCode.InvalidToken => new Exception("Your current token is no longer valid"),
                        ErrorCode.ServerError => new Exception($"Error from server: {data.ErrorMessage}"),
                        ErrorCode.InvalidHeader => new Exception(data.ErrorMessage),
                        ErrorCode.MissingHeader => new Exception("The header sent to the server was not found. This may be because you app is couropt or you are using the wron API version"),
                        ErrorCode.Forbidden => new Exception("You are not allowed to do this request"),
                        _ => new Exception(data?.Error.ToString()),
                    };
                }
            }
        }
        catch (Exception)
        {
            throw;
        }
    }

    public async Task<Task> SendMessage(string Message, params File?[] Files)
    {
        string key = Encryption.File.Channels.GetKey(Id);
        if (Id == 0) key = Encryption.ServerPublicKey;
        HTTP.Message m = new()
        {
            Context = Convert.ToBase64String(Encryption.Encrypt(Message, key)),
            Channel = Id,
        };
        if (Files is not null && Files.Length > 0)
        {
            List<long> bb = new();
            for (int i = 0; i < Files.Length; i++)
            {
                File? ff = Files[i];
                if (ff is not null)
                {
                    bb.Add(await ff.Upload(key));
                    Files[i] = null;
                }
            }
            m.Files = bb.ToArray();
        }
        IncomingHTTP data = await Server.SendServer("socketmessage", m, HTTP.MessageContext.Default.Message, IncomingHTTPContext.Default.IncomingHTTP);
        if (data.Error is not null && data.ErrorMessage != "Server responded with empty data") throw new Exception(data.ErrorMessage);
        return Task.CompletedTask;
    }
}

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

}