import {LoginHandler} from './LoginHandler';
import {LoginResponse} from './classes/LoginResponse';
import {LoginParameters} from './classes/LoginParameters';
import {Agent} from './classes/Agent';
import {PacketFlags} from './enums/PacketFlags';
import {UseCircuitCodeMessage} from './classes/messages/UseCircuitCode';
import {CompleteAgentMovementMessage} from './classes/messages/CompleteAgentMovement';
import {Message} from './enums/Message';
import {Packet} from './classes/Packet';
import {Region} from './classes/Region';
import {LogoutRequestMessage} from './classes/messages/LogoutRequest';
import {Utils} from './classes/Utils';
import {RegionHandshakeReplyMessage} from './classes/messages/RegionHandshakeReply';
import {RegionProtocolFlags} from './enums/RegionProtocolFlags';
import {AgentDataUpdateRequestMessage} from './classes/messages/AgentDataUpdateRequest';
import {TeleportProgressMessage} from './classes/messages/TeleportProgress';
import {TeleportStartMessage} from './classes/messages/TeleportStart';
import {TeleportEvent} from './events/TeleportEvent';
import {ClientEvents} from './classes/ClientEvents';
import {TeleportEventType} from './enums/TeleportEventType';
import {ClientCommands} from './classes/ClientCommands';
import {DisconnectEvent} from './events/DisconnectEvent';
import {KickUserMessage} from './classes/messages/KickUser';
import {StartPingCheckMessage} from './classes/messages/StartPingCheck';
import {CompletePingCheckMessage} from './classes/messages/CompletePingCheck';
import Timer = NodeJS.Timer;

export class Bot
{
    private loginParams: LoginParameters;
    private currentRegion: Region;
    private agent: Agent;
    private ping: Timer | null = null;
    private pingNumber = 0;
    private lastSuccessfulPing = 0;
    public clientEvents: ClientEvents | null = null;
    public clientCommands: ClientCommands;

    constructor(login: LoginParameters)
    {
        this.loginParams = login;
    }

    login()
    {
        return new Promise((resolve, reject) =>
        {
            const loginHandler = new LoginHandler();
            loginHandler.Login(this.loginParams).then((response: LoginResponse) =>
            {
                this.clientEvents = response.clientEvents;
                this.currentRegion = response.region;
                this.agent = response.agent;
                this.clientCommands = new ClientCommands(response.region, response.agent, this);
                resolve(response);
            }).catch((error: Error) =>
            {
                reject(error);
            });
        });
    }

    changeRegion(region: Region)
    {
        return new Promise((resolve, reject) =>
        {
            this.currentRegion = region;
            this.clientCommands = new ClientCommands(this.currentRegion, this.agent, this);
            this.connectToSim().then(() =>
            {
                resolve();
            }).catch((error) =>
            {
                reject(error);
            });
        });
    }

    close()
    {
        return new Promise((resolve, reject) =>
        {
            const circuit = this.currentRegion.circuit;
            const msg: LogoutRequestMessage = new LogoutRequestMessage();
            msg.AgentData = {
                AgentID: this.agent.agentID,
                SessionID: circuit.sessionID
            };
            circuit.sendMessage(msg, PacketFlags.Reliable);
            circuit.waitForMessage(Message.LogoutReply, 5000).then((packet: Packet) =>
            {

            }).catch((error) =>
            {
                console.error('Timeout waiting for logout reply')
            }).then(() =>
            {
                this.agent.shutdown();
                this.currentRegion.shutdown();
                delete this.currentRegion;
                delete this.agent;
                delete this.clientCommands;
                if (this.ping !== null)
                {
                    clearInterval(this.ping);
                    this.ping = null;
                }

                const disconnectEvent = new DisconnectEvent();
                disconnectEvent.requested = true;
                disconnectEvent.message = 'Logout completed';
                if (this.clientEvents)
                {
                    this.clientEvents.onDisconnected.next(disconnectEvent);
                }
                resolve();
            });
        });
    }

    connectToSim()
    {
        return new Promise((resolve, reject) =>
        {
            const circuit = this.currentRegion.circuit;
            circuit.init();
            const msg: UseCircuitCodeMessage = new UseCircuitCodeMessage();
            msg.CircuitCode = {
                SessionID: circuit.sessionID,
                ID: this.agent.agentID,
                Code: circuit.circuitCode
            };
            circuit.waitForAck(circuit.sendMessage(msg, PacketFlags.Reliable), 1000).then(() =>
            {
                const agentMovement: CompleteAgentMovementMessage = new CompleteAgentMovementMessage();
                agentMovement.AgentData = {
                    AgentID: this.agent.agentID,
                    SessionID: circuit.sessionID,
                    CircuitCode: circuit.circuitCode
                };
                circuit.sendMessage(agentMovement, PacketFlags.Reliable);
                return circuit.waitForMessage(Message.RegionHandshake, 10000);
            }).then((packet: Packet) =>
            {
                const handshakeReply: RegionHandshakeReplyMessage = new RegionHandshakeReplyMessage();
                handshakeReply.AgentData = {
                    AgentID: this.agent.agentID,
                    SessionID: circuit.sessionID
                };
                handshakeReply.RegionInfo = {
                    Flags: RegionProtocolFlags.SelfAppearanceSupport | RegionProtocolFlags.AgentAppearanceService
                };
                return circuit.waitForAck(circuit.sendMessage(handshakeReply, PacketFlags.Reliable), 10000)
            }).then(() =>
            {
                if (this.clientCommands !== null)
                {
                    this.clientCommands.network.setBandwidth(1536000);
                }

                const agentRequest = new AgentDataUpdateRequestMessage();
                agentRequest.AgentData = {
                    AgentID: this.agent.agentID,
                    SessionID: circuit.sessionID
                };
                circuit.sendMessage(agentRequest, PacketFlags.Reliable);
                this.agent.setInitialAppearance();
                this.agent.circuitActive();

                this.lastSuccessfulPing = new Date().getTime();
                this.ping = setInterval(() =>
                {
                    this.pingNumber++;
                    if (this.pingNumber > 255)
                    {
                        this.pingNumber = 0;
                    }
                    const ping = new StartPingCheckMessage();
                    ping.PingID = {
                        PingID: this.pingNumber,
                        OldestUnacked: this.currentRegion.circuit.getOldestUnacked()
                    };
                    circuit.sendMessage(ping, PacketFlags.Reliable);
                    circuit.waitForMessage(Message.CompletePingCheck, 10000, ((pingData: {
                        pingID: number,
                        timeSent: number
                    }, packet: Packet): boolean =>
                    {
                        const cpc = packet.message as CompletePingCheckMessage;
                        if (cpc.PingID.PingID === pingData.pingID)
                        {
                            this.lastSuccessfulPing = new Date().getTime();
                            const pingTime = this.lastSuccessfulPing - pingData.timeSent;
                            if (this.clientEvents !== null)
                            {
                                this.clientEvents.onCircuitLatency.next(pingTime);
                            }
                            return true;
                        }
                        return false;
                    }).bind(this, {
                        pingID: this.pingNumber,
                        timeSent: new Date().getTime()
                    }));

                    if ((new Date().getTime() - this.lastSuccessfulPing) > 60000)
                    {
                        // We're dead, jim
                        this.agent.shutdown();
                        this.currentRegion.shutdown();
                        delete this.currentRegion;
                        delete this.agent;
                        delete this.clientCommands;
                        if (this.ping !== null)
                        {
                            clearInterval(this.ping);
                            this.ping = null;
                        }

                        const disconnectEvent = new DisconnectEvent();
                        disconnectEvent.requested = false;
                        disconnectEvent.message = 'Circuit timeout';
                        if (this.clientEvents)
                        {
                            this.clientEvents.onDisconnected.next(disconnectEvent);
                        }
                    }

                }, 5000);

                circuit.subscribeToMessages(
                   [
                       Message.TeleportFailed,
                       Message.TeleportFinish,
                       Message.TeleportLocal,
                       Message.TeleportStart,
                       Message.TeleportProgress,
                       Message.TeleportCancel,
                       Message.KickUser
                   ], (packet: Packet) =>
                    {
                        switch (packet.message.id)
                        {
                            case Message.TeleportLocal:
                            {
                                const tpEvent = new TeleportEvent();
                                tpEvent.message = '';
                                tpEvent.eventType = TeleportEventType.TeleportCompleted;
                                tpEvent.simIP = 'local';
                                tpEvent.simPort = 0;
                                tpEvent.seedCapability = '';

                                if (this.clientEvents === null)
                                {
                                    reject(new Error('ClientEvents is null'));
                                    return;
                                }

                                this.clientEvents.onTeleportEvent.next(tpEvent);
                                break;
                            }
                            case Message.TeleportStart:
                            {
                                const teleportStart = packet.message as TeleportStartMessage;

                                const tpEvent = new TeleportEvent();
                                tpEvent.message = '';
                                tpEvent.eventType = TeleportEventType.TeleportStarted;
                                tpEvent.simIP = '';
                                tpEvent.simPort = 0;
                                tpEvent.seedCapability = '';

                                if (this.clientEvents === null)
                                {
                                    reject(new Error('ClientEvents is null'));
                                    return;
                                }

                                this.clientEvents.onTeleportEvent.next(tpEvent);
                                break;
                            }
                            case Message.TeleportProgress:
                            {
                                const teleportProgress = packet.message as TeleportProgressMessage;
                                const message = Utils.BufferToStringSimple(teleportProgress.Info.Message);

                                const tpEvent = new TeleportEvent();
                                tpEvent.message = message;
                                tpEvent.eventType = TeleportEventType.TeleportProgress;
                                tpEvent.simIP = '';
                                tpEvent.simPort = 0;
                                tpEvent.seedCapability = '';

                                if (this.clientEvents === null)
                                {
                                    reject(new Error('ClientEvents is null'));
                                    return;
                                }

                                this.clientEvents.onTeleportEvent.next(tpEvent);
                                break;
                            }
                            case Message.KickUser:
                            {
                                const kickUser = packet.message as KickUserMessage;
                                this.agent.shutdown();
                                this.currentRegion.shutdown();
                                delete this.currentRegion;
                                delete this.agent;
                                delete this.clientCommands;
                                if (this.ping !== null)
                                {
                                    clearInterval(this.ping);
                                    this.ping = null;
                                }

                                const disconnectEvent = new DisconnectEvent();
                                disconnectEvent.requested = false;
                                disconnectEvent.message = Utils.BufferToStringSimple(kickUser.UserInfo.Reason);
                                if (this.clientEvents)
                                {
                                    this.clientEvents.onDisconnected.next(disconnectEvent);
                                }
                                break;
                            }
                        }
                    });


                resolve();
            }).catch((error) =>
            {
                reject(error);
            });
        });
    }
}