import {AbstractCommandHandler, AbstractCommandHandlerBoss} from "tc-shared/connection/AbstractCommandHandler";
import {
    AbstractServerConnection, CommandOptionDefaults, CommandOptions,
    ConnectionStateListener,
    ServerCommand,
    voice
} from "tc-shared/connection/ConnectionBase";
import {CommandResult} from "tc-shared/connection/ServerConnectionDeclaration";
import {tr} from "tc-shared/i18n/localize";
import {ConnectionHandler, ConnectionState, DisconnectReason} from "tc-shared/ConnectionHandler";
import {NativeServerConnection, ServerType, spawn_server_connection as spawn_native_server_connection, destroy_server_connection as destroy_native_server_connection} from "tc-native/connection";
import {ConnectionCommandHandler} from "tc-shared/connection/CommandHandler";
import {HandshakeHandler} from "tc-shared/connection/HandshakeHandler";
import {ServerAddress} from "tc-shared/ui/server";
import {TeaSpeakHandshakeHandler} from "tc-shared/profiles/identities/TeamSpeakIdentity";
import AbstractVoiceConnection = voice.AbstractVoiceConnection;
import {VoiceConnection} from "./VoiceConnection";

class ErrorCommandHandler extends AbstractCommandHandler {
    private _handle: ServerConnection;

    constructor(handle: ServerConnection) {
        super(handle);
        this._handle = handle;
    }

    handle_command(command: ServerCommand): boolean {
        if(command.command === "error") {
            const return_listener: {[key: string]: (result: CommandResult) => any} = this._handle["_return_listener"];
            const data = command.arguments[0];

            let return_code : string = data["return_code"];
            if(!return_code) {
                const listener = return_listener["last_command"] || return_listener["_clientinit"];
                if(typeof(listener) === "function") {
                    console.warn(tr("Received error without return code. Using last command (%o)"), listener);
                    listener(new CommandResult(command.arguments));
                    delete return_listener["last_command"];
                    delete return_listener["_clientinit"];
                } else {
                    console.warn(tr("Received error without return code."), data);
                }
                return false;
            }

            if(return_listener[return_code]) {
                return_listener[return_code](new CommandResult(command.arguments));
            } else {
                console.warn(tr("Error received for no handler! (%o)"), data);
            }
            return true;
        } else if(command.command == "initivexpand") {
            if(command.arguments[0]["teaspeak"] == true) {
                console.log("Using TeaSpeak identity type");
                this._handle.handshake_handler().startHandshake();
            }
            return true;
        } else if(command.command == "initivexpand2") {
            /* its TeamSpeak or TeaSpeak with experimental 3.1 and not up2date */
            this._handle["_do_teamspeak"] = true;
        } else if(command.command == "initserver") {
            const return_listener: {[key: string]: (result: CommandResult) => any} = this._handle["_return_listener"];

            if(typeof(return_listener["_clientinit"]) === "function") {
                return_listener["_clientinit"](new CommandResult([{id: 0, message: ""}]));
                delete return_listener["_clientinit"];
            }
        } else if(command.command == "notifyconnectioninforequest") {
            this._handle.send_command("setconnectioninfo",
                {
                    //TODO calculate
                    connection_ping: 0.0000,
                    connection_ping_deviation: 0.0,

                    connection_packets_sent_speech: 0,
                    connection_packets_sent_keepalive: 0,
                    connection_packets_sent_control: 0,
                    connection_bytes_sent_speech: 0,
                    connection_bytes_sent_keepalive: 0,
                    connection_bytes_sent_control: 0,
                    connection_packets_received_speech: 0,
                    connection_packets_received_keepalive: 0,
                    connection_packets_received_control: 0,
                    connection_bytes_received_speech: 0,
                    connection_bytes_received_keepalive: 0,
                    connection_bytes_received_control: 0,
                    connection_server2client_packetloss_speech: 0.0000,
                    connection_server2client_packetloss_keepalive: 0.0000,
                    connection_server2client_packetloss_control: 0.0000,
                    connection_server2client_packetloss_total: 0.0000,
                    connection_bandwidth_sent_last_second_speech: 0,
                    connection_bandwidth_sent_last_second_keepalive: 0,
                    connection_bandwidth_sent_last_second_control: 0,
                    connection_bandwidth_sent_last_minute_speech: 0,
                    connection_bandwidth_sent_last_minute_keepalive: 0,
                    connection_bandwidth_sent_last_minute_control: 0,
                    connection_bandwidth_received_last_second_speech: 0,
                    connection_bandwidth_received_last_second_keepalive: 0,
                    connection_bandwidth_received_last_second_control: 0,
                    connection_bandwidth_received_last_minute_speech: 0,
                    connection_bandwidth_received_last_minute_keepalive: 0,
                    connection_bandwidth_received_last_minute_control: 0
                }
            );
        }
        return false;
    }
}

export class ServerConnection extends AbstractServerConnection {
    private _native_handle: NativeServerConnection;
    private _voice_connection: VoiceConnection;

    private _do_teamspeak: boolean;
    private _return_listener: {[key: string]: (result: CommandResult) => any} = {};

    private _command_handler: NativeConnectionCommandBoss;
    private _command_error_handler: ErrorCommandHandler;
    private _command_handler_default: ConnectionCommandHandler;

    private _remote_address: ServerAddress;
    private _handshake_handler: HandshakeHandler;

    private _return_code_index: number = 0;

    onconnectionstatechanged: ConnectionStateListener;

    constructor(props: ConnectionHandler) {
        super(props);

        this._command_handler = new NativeConnectionCommandBoss(this);
        this._command_error_handler = new ErrorCommandHandler(this);
        this._command_handler_default = new ConnectionCommandHandler(this);

        this._command_handler.register_handler(this._command_error_handler);
        this._command_handler.register_handler(this._command_handler_default);

        this._native_handle = spawn_native_server_connection();
        this._native_handle.callback_disconnect = reason => {
            this.client.handleDisconnect(DisconnectReason.CONNECTION_CLOSED, {
                reason: reason,
                event: event
            });
        };
        this._native_handle.callback_command = (command, args, switches) => {
            console.log("Received: %o %o %o", command, args, switches);
            //FIXME catch error

            this._command_handler.invoke_handle({
                command: command,
                arguments: args
            });
        };
        this._voice_connection = new VoiceConnection(this, this._native_handle._voice_connection);

        this.command_helper.initialize();
        this._voice_connection.setup();
    }

    native_handle() : NativeServerConnection {
        return this._native_handle;
    }

    finalize() {
        if(this._native_handle)
            destroy_native_server_connection(this._native_handle);
        this._native_handle = undefined;
    }

    connect(address: ServerAddress, handshake: HandshakeHandler, timeout?: number): Promise<void> {
        this.updateConnectionState(ConnectionState.CONNECTING);

        this._remote_address = address;
        this._handshake_handler = handshake;
        this._do_teamspeak = false;
        handshake.setConnection(this);
        handshake.initialize();

        return new Promise<void>((resolve, reject) => {
            this._native_handle.connect({
                remote_host: address.host,
                remote_port: address.port,

                timeout: typeof(timeout) === "number" ? timeout : -1,


                callback: error => {
                    if(error != 0) {
                        /* required to notify the handle, just a promise reject does not work */
                        this.client.handleDisconnect(DisconnectReason.CONNECT_FAILURE, error);
                        this.updateConnectionState(ConnectionState.UNCONNECTED);
                        reject(this._native_handle.error_message(error));
                        return;
                    } else {
                        resolve();
                    }
                    this.updateConnectionState(ConnectionState.AUTHENTICATING);

                    console.log("Remote server type: %o (%s)", this._native_handle.server_type, ServerType[this._native_handle.server_type]);
                    if(this._native_handle.server_type == ServerType.TEAMSPEAK || this._do_teamspeak) {
                        console.log("Trying to use TeamSpeak's identity system");
                        this.handshake_handler().on_teamspeak();
                    }
                },

                identity_key: (handshake.get_identity_handler() as TeaSpeakHandshakeHandler).identity.private_key,
                teamspeak: false
            })
        });
    }


    remote_address(): ServerAddress {
        return this._remote_address;
    }

    handshake_handler(): HandshakeHandler {
        return this._handshake_handler;
    }

    connected(): boolean {
        return typeof(this._native_handle) !== "undefined" && this._native_handle.connected();
    }

    disconnect(reason?: string): Promise<void> {
        console.trace("Disconnect: %s",reason);
        return new Promise<void>((resolve, reject) => this._native_handle.disconnect(reason || "", error => {
            if(error == 0)
                resolve();
            else
                reject(this._native_handle.error_message(error));
        }));
    }

    support_voice(): boolean {
        return true;
    }

    voice_connection(): AbstractVoiceConnection {
        return this._voice_connection;
    }

    command_handler_boss(): AbstractCommandHandlerBoss {
        return this._command_handler;
    }

    private generate_return_code() : string {
        return (this._return_code_index++).toString();
    }

    send_command(command: string, data?: any, _options?: CommandOptions): Promise<CommandResult> {
        if(!this.connected()) {
            console.warn(tr("Tried to send a command without a valid connection."));
            return Promise.reject(tr("not connected"));
        }

        const options: CommandOptions = {};
        Object.assign(options, CommandOptionDefaults);
        Object.assign(options, _options);

        data = $.isArray(data) ? data : [data || {}];
        if(data.length == 0) /* we require min one arg to append return_code */
            data.push({});

        let return_code = data[0]["return_code"] !== undefined ? data[0].return_code : this.generate_return_code();
        data[0]["return_code"] = return_code;

        console.log("Sending %s (%o)", command, data);
        const promise = new Promise<CommandResult>((resolve, reject) => {
            const timeout_id = setTimeout(() => {
                delete this._return_listener[return_code];
                reject("timeout");
            }, 5000);

            this._return_listener[return_code] = result => {
                clearTimeout(timeout_id);
                delete this._return_listener[return_code];

                (result.success ? resolve : reject)(result);
            };

            if(command == "clientinit")
                this._return_listener["_clientinit"] = this._return_listener[return_code]; /* fix for TS3 (clientinit does not accept a return code) */

            try {
                this._native_handle.send_command(command, data, options.flagset || []);
            } catch(error) {
                console.warn(tr("Failed to send command: %o"), error);
            }
        });
        return this._command_handler_default.proxy_command_promise(promise, options);
    }

    ping(): { native: number; javascript?: number } {
        return {
            native: this._native_handle ? (this._native_handle.current_ping() / 1000) : -2
        };
    }
}

export class NativeConnectionCommandBoss extends AbstractCommandHandlerBoss {
    constructor(connection: AbstractServerConnection) {
        super(connection);
    }
}


/* override the "normal" connection */
export function spawn_server_connection(handle: ConnectionHandler) : AbstractServerConnection {
    console.log("Spawning native connection");
    return new ServerConnection(handle); /* will be overridden by the client */
}

export function destroy_server_connection(handle: AbstractServerConnection) {
    if(!(handle instanceof ServerConnection))
        throw "invalid handle";
    //TODO: Here!
    console.log("Call to destroy a server connection");
}