using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Text.Json.Serialization.Metadata;
using System.Threading;
using System.Threading.Tasks;
using JacobTechEncryption;
using JacobTechEncryption.Enums;
using Luski.net.Enums;
using Luski.net.Enums.Main;
using Luski.net.Interfaces;
using Luski.net.JsonTypes;
using Luski.net.JsonTypes.BaseTypes;
using Luski.net.JsonTypes.HTTP;
using Luski.net.JsonTypes.Public;
using Luski.net.Structures;
using Luski.net.Structures.Public;
using Channel = Luski.net.JsonTypes.Public.Channel;
using Role = Luski.net.Structures.Public.Role;
using SocketUser = Luski.net.Structures.Public.SocketUser;

namespace Luski.net;

public partial class PublicServer : Server
{
    public List<SocketChannel> chans { get; } = new();
    public List<SocketCategory> cats { get; } = new();
    public List<Role> roles { get; } = new();

    public SocketAppUser User { get; private set; } = null!;

    private PublicServer(string Domain, string API_Version, bool Secure = true) :
        base(Domain, API_Version, Secure)
    { }

    internal static async Task<PublicServer> GetServer(string Domain, string API_Version, bool Secure = true)
    {
        DateTime dt = DateTime.UtcNow;
        Console.WriteLine("Connecting to public server '{0}' using API {1}.", Domain, API_Version);
        PublicServer s = new(Domain, API_Version, Secure);
        ServerInfo? si = null;
        try
        {
            si = await s.GetFromServer("socketserver", ServerInfoContext.Default.ServerInfo, CancellationToken.None);
            s.EncryptionHandler.ServerPublicKey = await (await new HttpClient()
                .GetAsync($"{(s.Secure ? "https" : "http")}://{s.Domain}/{s.ApiVersion}/Keys/PublicKey"))
                .Content
                .ReadAsStringAsync();
        }
        catch (Exception e)
        {
            LocalServerInfo ServerListing = s.Storage.GetJson(StorageDirectory.ServerInfo, "Servers.json", true,
                LocalServerInfoContext.Default.LocalServerInfo);
            if (ServerListing.AlternateServers.Length > 0)
            {
                Console.WriteLine("Failed to connect to public server '{0}' using API {1}. Attempting to connect to alternate servers.", Domain, API_Version);
                foreach (ServerData Server in ServerListing.AlternateServers)
                {
                    s.Secure = Server.Secure;
                    s.Domain = Server.DomainAndPort;
                    
                    try
                    {
                        
                        si = await s.GetFromServer("socketserver", ServerInfoContext.Default.ServerInfo, CancellationToken.None);
                        s.EncryptionHandler.ServerPublicKey = await (await new HttpClient()
                                .GetAsync($"{(s.Secure ? "https" : "http")}://{s.Domain}/{s.ApiVersion}/Keys/PublicKey"))
                            .Content
                            .ReadAsStringAsync();
                        Console.WriteLine("Public server '{0}' connection restored by alternate server '{1}' using API {2}.", Domain, s.Domain, API_Version);
                        break;
                    }
                    catch
                    {
                        // ignored
                    }
                }
            }
            
            if (si is null) throw;
        }
        s.Name = si.name;
        s.Description = si.description;
        s.wssurl = si.wssv4;
        s.ServerType = ServerType.Public;
        Console.WriteLine("Connected to public server '{0}' using API {1} in {4}.\nServer Name: {2}\nServer Description: {3}", Domain, API_Version, s.Name, s.Description, DateTime.UtcNow.Subtract(dt).ToString("g"));
        return s;
    }
    
    public async Task<TCategory> GetCategory<TCategory>(long id, CancellationToken CancellationToken) where TCategory : SocketCategory, new()
    {
        Category request;
        if (cats.Count > 0 && cats.Any(s => s.ID == id))
        {
            return (cats.Where(s => s is TCategory && s.ID == id).First() as TCategory)!;
        }
        while (true)
        {
            if (CanRequest)
            {
                request = await GetFromServer($"SocketCategory", PublicCategoryContext.Default.Category, CancellationToken, new KeyValuePair<string, string?>("id", id.ToString()));
                break;
            }
        }
        if (request is null) throw new Exception("Something was wrong with the server responce");
        if (request.Error is null)
        {
            if (cats.Count > 0 && cats.Any(s => s.ID == request.ID))
            {
                foreach (SocketCategory? p in cats.Where(s => s.ID == request.ID))
                {
                    cats.Remove(p);
                }
            }
            
            LocalKeyInfo deckey = EncryptionHandler.GetKey(request.DescriptionEncryptionKey);
            string dec = deckey.EncryptionType switch
            {
                EncryptionType.RSA => Encryption.RSA.Decrypt(Convert.FromBase64String(request.Description), deckey.Key, request.DescriptionEncoderType),
                EncryptionType.AES => Encryption.Generic.Encoders[(short)request.DescriptionEncoderType].GetString(
                    Encryption.AES.Decrypt(Convert.FromBase64String(request.Description), deckey.Key)),
                _ => Encryption.Generic.Encoders[(short)request.DescriptionEncoderType].GetString(Convert.FromBase64String(request.Description))
            };
            LocalKeyInfo nkey = EncryptionHandler.GetKey(request.TitleEncryptionKey);
            string n = nkey.EncryptionType switch
            {
                EncryptionType.RSA => Encryption.RSA.Decrypt(Convert.FromBase64String(request.Name), nkey.Key, request.TitleEncoderType),
                EncryptionType.AES => Encryption.Generic.Encoders[(short)request.TitleEncoderType].GetString(
                    Encryption.AES.Decrypt(Convert.FromBase64String(request.Name), nkey.Key)),
                _ => Encryption.Generic.Encoders[(short)request.TitleEncoderType].GetString(Convert.FromBase64String(request.Name))
            };
            
            TCategory bob = new()
            {
                ID = request.ID,
                ParentID = request.Parent,
                Description = dec,
                DescriptionEncoderType = request.DescriptionEncoderType,
                DescriptionEncryptionKey = request.DescriptionEncryptionKey,
                Channels = request.Channels,
                Categories = request.InnerCategories,
                Name = n,
                RoleOverides = request.RoleOverides,
                UserOverides = request.UserOverides,
                TitleEncoderType = request.TitleEncoderType,
                TitleEncryptionKey = request.TitleEncryptionKey,
                Server = this,
                Color = new(request.Color)
            };
            cats.Add(bob);
            return bob;
        }
        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 async Task<Role> GetRole(long id)
    {
        Role[] r = roles.Where(s => s.ID == id).ToArray();
        if (r.Length > 0) return r[0];
        JsonTypes.Public.Role s = await GetFromServer("SocketRole?id=" + id.ToString(), RoleContext.Default.Role, CancellationToken.None);
        
        Role role = new()
        {
            Server = this,
            ID = s.id,
            Color = new(s.color),
            Description = s.description,
            DisplayName = s.display_name,
            MembersListID = s.members_list,
            Name = s.name,
            Index = s.index,
            ServerPermissions = s.server_permissions
        };
        roles.Add(role);
        return role;
    }
    
    public async Task<TChannel> GetChannel<TChannel>(long id, CancellationToken CancellationToken) where TChannel : SocketChannel, new()
    {
        Channel request;
        if (chans.Count > 0 && chans.Any(s => s.ID == id))
        {
            return (chans.Where(s => s is TChannel && s.ID == id).First() as TChannel)!;
        }
        while (true)
        {
            if (CanRequest)
            {
                request = await GetFromServer($"SocketChannel", PublicChannelContext.Default.Channel, CancellationToken, new KeyValuePair<string, string?>("id", id.ToString()));
                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 (SocketChannel? p in chans.Where(s => s.ID == request.ID))
                {
                    chans.Remove(p);
                }
            }
            
            LocalKeyInfo deckey = EncryptionHandler.GetKey(request.DescriptionEncryptionKey);
            string dec = deckey.EncryptionType switch
            {
                EncryptionType.RSA => Encryption.RSA.Decrypt(Convert.FromBase64String(request.Description), deckey.Key, request.DescriptionEncoderType),
                EncryptionType.AES => Encryption.Generic.Encoders[(short)request.DescriptionEncoderType].GetString(
                    Encryption.AES.Decrypt(Convert.FromBase64String(request.Description), deckey.Key)),
                _ => Encryption.Generic.Encoders[(short)request.DescriptionEncoderType].GetString(Convert.FromBase64String(request.Description))
            };
            LocalKeyInfo nkey = EncryptionHandler.GetKey(request.TitleEncryptionKey);
            string n = nkey.EncryptionType switch
            {
                EncryptionType.RSA => Encryption.RSA.Decrypt(Convert.FromBase64String(request.Name), nkey.Key, request.TitleEncoderType),
                EncryptionType.AES => Encryption.Generic.Encoders[(short)request.TitleEncoderType].GetString(
                    Encryption.AES.Decrypt(Convert.FromBase64String(request.Name), nkey.Key)),
                _ => Encryption.Generic.Encoders[(short)request.TitleEncoderType].GetString(Convert.FromBase64String(request.Name))
            };
            
            TChannel bob = new()
            {
                ID = request.ID,
                CategoryID = request.Parent,
                Description = dec,
                DescriptionEncoderType = request.DescriptionEncoderType,
                DescriptionEncryptionKey = request.DescriptionEncryptionKey,
                EncoderTypes = request.EncoderTypes,
                EncryptionKeys = request.EncryptionKeys,
                Epoch = request.Epoch,
                Name = n,
                RoleOverides = request.RoleOverides,
                UserOverides = request.UserOverides,
                Type = request.Type,
                TitleEncoderType = request.TitleEncoderType,
                TitleEncryptionKey = request.TitleEncryptionKey,
                PictureType = request.PictureType,
                Server = this,
                Color = new(request.Color)
            };
            chans.Add(bob);
            return bob;
        }
        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 async Task<Tuser> GetUser<Tuser>(long UserId, CancellationToken CancellationToken) where Tuser : SocketUser, new()
    {
        JsonTypes.Public.SocketUser 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",
                    PublicSocketUserContext.Default.SocketUser,
                    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);
            }
        }
        if (user is null || user.Error is not null)
        {
            string error = "User was null";
            if (user is not null && user.Error is not null) error = $"{user.Error}: {user.ErrorMessage}";
            throw new Exception($"Something went wrong getting your user information\n{error}");
        }

        Tuser u = new();
        if (u is SocketUser)
        {
            u = new()
            {
                Server = this,
                Id = user.ID,
                DisplayName = user.DisplayName,
                PictureType = user.PictureType,
                RoleIds = user.RoleIds,
                Status = user.Status
            };
        }
        else
        {
            u = (new SocketAppUser()
            {
                Server = this,
                Id = user.ID,
                DisplayName = user.DisplayName,
                SelectedChannel = user.SelectedChannel,
                PictureType = user.PictureType,
                RoleIds = user.RoleIds,
                Status = user.Status,
                Username = user.Username
            } as Tuser)!;
        }
        poeople.Add(u);
        return u;
    }
    
    /// <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;
    }
    
    public string Name { get; private set; }
    public string Description { get; private set; }
}