import { CSSResult } from 'lit-element';
/**
 * Default Status Codes for systemVariables, define the UI appereance and behaviour of the variable.
 * They are simple strings and can be extended with custom statuses.
 */
export declare enum VarStatusCodes {
    /** The variable is subscribed for receiving updates. This is the default "ALL GOOD". */
    Subscribed = "SUBSCRIBED",
    /**Something went wrong in retrieving the variable serverside, like for example the variable does not exist or
     * is corrupted, in general an action by the admin must be taken to fix this. The user should not be able to
     * interact with the item. The variable is not subscribed. Its value, if any, should not be trusted.
     */
    Error = "ERROR",
    /**Loading... The variable is waiting to be written or being subscribed. Usefull to show some related UI. */
    Pending = "PENDING",
    /**The variable value is within some "DANGER" zone. Used to show variable related alarms. */
    Warning = "WARNING",
    /**The variable is ok, but will not receive updates for some reasons, for example no network.
     * One can trust the variable value as its last updated value.*/
    Unsubscribed = "UNSUBSCRIBED"
}
export declare var VarStatusCodesLit: {
    [key: string]: CSSResult;
};
/**
 * Static class defining status codes for the data engine status.
 * @prop Ready - Engine Running, all ok
 * @prop Down  - Engine is still down, no subscription can be made, but no error was raised.
 * @prop Warming - Waiting for initialization to complete
 * @prop Error - Engine could not be initialized.
 * */
export declare class ServiceStatusCodes {
    static Ready: string;
    static Down: string;
    static Warming: string;
    static Error: string;
}
/**
 * Static class defining Error codes that appear during communication with the server.
 * These are variables related errors.
 *
 * @prop VarNotExist - Variable was not found in server
 * @prop WontSubcribe
 * @prop CantSubcribe
 * @prop CantUnSubcribe
 * @prop BadValue - Provided Write Request value has wrong type or could not be understood
 * @prop NoNetwork - Network is down, cannot retrieve values
 * @prop NetError
 * @prop Unauthorized - Action cannot be performed, user has no rights.
 * @prop BadReq - HTTP 400 error on request
 * @prop ServerError - Serverside bug? HTTP 500
 * @prop NotFound - Return from a HTTP 404
 * @prop BadData
 * @prop EngineNotExist
 * @prop UnknownError
 */
export declare class ErrorCodes {
    static VarNotExist: string;
    static WontSubcribe: string;
    static CantSubcribe: string;
    static CantUnSubcribe: string;
    static BadValue: string;
    static NoNetwork: string;
    static NetError: string;
    static Unauthorized: string;
    static BadReq: string;
    static ServerError: string;
    static NotFound: string;
    static BadData: string;
    static EngineNotExist: string;
    static UnknownError: string;
}
export declare enum Actions {
    Write = "WRITE",
    Read = "READ",
    Subscribe = "SUBSCRIBE",
    Unsubscribe = "UNSUBSCRIBE",
    Update = "UPDATE",
    Init = "INITIALIZE",
    Unknown = "UNKNOWN"
}
/**
 * It represent a generic object belonging to a specific system.
 *
 * @prop {string} name - Name of the variable, an identifier for the server
 * @prop {string} system - System namespace that identifies the server item
*/
export declare class systemObject {
    name: string;
    system: string;
    /**
     *
     * @param Name {string} Variable Name
     * @param System {string} System Namespace
     */
    constructor(Name: string, System: string);
}
export interface basicError {
    code: string;
    message?: string;
}
/**
 * Describe a system error occurred during a requested Action (like subscribe, write, etc.).
 * @prop {string}  code - Error code as defined in ErrorCodes
 * @prop {string}  message  - The error message (this by default will auto build itself), but you can override it.
 * @prop {string}  systemName  - System name
 * @prop {string}  targetName  - Target of the Action that generated the error, for example the caller of a write method.
 * @prop {string}  action      - Action Code as defined in "Actions", what was going to be performed.
 * @prop {number}  timestamp_ms - Time the error occurred, by default is Date.Now()
 * @prop {boolean} ack          - If the error was acknowledged by user or not.
 */
export declare class systemError implements basicError {
    code: string;
    message: string;
    timestamp_ms: number;
    systemName: string;
    action: string;
    targetName: string;
    ack: boolean;
    /**
     * Standard constructor, by default will auto-build the error message and will set timestamp to Now.
     * @param sysName System name for example an engine name
     * @param Code Error code as in "ErrorCodes"
     * @param target (optional) name of who is in fault, like for example a variable name.
     * @param Action (optional) Action Code of what was going to be performed.
     */
    constructor(sysName: string, Code: string, target?: string, Action?: string);
    buildDefaultMessage(): string;
}
export declare class systemAlarm extends systemError {
    isActive: boolean;
    constructor(sysName: string, Code: string, target: string, Action?: string);
    buildDefaultMessage(): string;
}
/**
 * Class that implemets a general response to actions that involve variable read, write, subscribe, etc.
 * @prop {boolean} success  - weather the request had success or not
 * @prop {object}  error  - if success is false then this must not be null, contain error code and error message(optional).
 * @prop {string} name - name of the variable.
 * @prop {string}  system  -  system name related to the variable.
 * @prop {any}  value  -  the value of the variable (can be an object if supported).
 *
 */
export declare class VarResponse extends systemObject implements basicResponse {
    success: boolean;
    error: basicError;
    value: any;
    /**
     *
     * @param Success {bolean} - weather the request had success or not
     * @param name {string} - name of the variable
     * @param system {string} - system name related to the variable
     * @param value {any} -  the value of the variable (can be an object if supported)
     */
    constructor(Success: boolean, _name: string, _system: string, _value?: any);
    /** helper to set the "error" property. */
    setError(ErrorCode: string, Message?: string): void;
}
/**
 * Defines a generic variable bound to a specific system.
 * The "value" must be a JSON compatible object, since these values are
 * persisted in localstorage. So anything is good but functions.
 */
export declare class systemVariable extends systemObject implements variable {
    value: any;
    status: string;
    constructor(sys_obj: systemObject);
}
export interface basicResponse {
    success: boolean;
    error?: basicError;
}
export interface variable {
    value: any;
    status: string;
    [key: string]: any;
}
export interface customAction {
    (target: systemObject, data: any): Promise<basicResponse>;
}