// Type definitions for enigma.js 2.2
// Project: https://github.com/qlik-oss/enigma.js/
// Definitions by: Konrad Mattheis <https://github.com/konne>
// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
// TypeScript Version: 2.2

declare module "enigma.js" {
    const e: IEnigmaClass;
    export = e;
}

// declare const enigmaJS: IEnigmaClass;
// export = enigmaJS;
// export as namespace enigmaJS;

interface IEnigmaClass {
    /**
     * Create a session object.
     * @returns - Returns a session.
     * Note: See Configuration for the configuration options.
     */
    create(config: enigmaJS.IConfig): enigmaJS.ISession;
}

declare namespace enigmaJS {
    type MixinType = "Doc"| "GenericObject"| "GenericBookmark" | string;

    interface IMixin {
        /**
         * QIX Engine types like for example GenericObject, Doc, GenericBookmark, are supported but also custom GenericObject
         * types such as barchart, story and myCustomType.
         * An API will get both their generic type as well as custom type mixins applied.
         */
        types: MixinType[];

        init(args: {config: any, api: IGeneratedAPI}): void;

        /**
         * mixin.extend is an object containing methods to extend the generated API with. These method names cannot already exist or enigma.js will throw an error.
         */
        extend?: any;

        /**
         * mixin.override is an object containing methods that overrides existing API methods.
         * These method names needs to exist already* or engima.js will throw an error.
         * Be careful when overriding, you may break expected behaviors in other mixins or your application.
         * base is a reference to the previous mixin method, can be used to invoke the mixin chain before this mixin method.
         */
        override?: any;
    }

    interface IResponseInterceptors {
        /**
         * This method is invoked when a previous interceptor has rejected the promise, use this to handle for example errors before they are sent into mixins.
         * @param session refers to the session executing the interceptor.
         * @param request is the JSON-RPC request resulting in this error. You may use .retry() to retry sending it to QIX Engine.
         * @param error is whatever the previous interceptor rejected with.
         */
        onRejected?(session: ISession, request: any, error: any): Promise<any>;

        /**
         * This method is invoked when a promise has been successfully resolved, use this to modify the result or reject the promise chain before it is sent to mixins.
         * @param session refers to the session executing the interceptor.
         * @param request is the JSON-RPC request resulting in this error. You may use .retry() to retry sending it to QIX Engine.
         * @param error is whatever the previous interceptor resolved with.
         */
        onFulfilled?(session: ISession, request: any, result: any): Promise<any>;
    }

    interface IRequestInterceptors {
        /**
         * This method is invoked when a request is about to be sent to QIX Engine.
         * @param session refers to the session executing the interceptor.
         * @param request is the JSON-RPC request resulting in this error. You may use .retry() to retry sending it to QIX Engine.
         * @returns request the new request
         */
        onFulfilled?(session: ISession, request: any, result: any): any;
    }

    interface IProtocol {
        // Set to false to disable the use of the bandwidth-reducing delta protocol.
        delta?: boolean;
    }

    /**
     * This section describes the configuration object that is sent into enigma.create(config).
     */
    interface IConfig {
        /**
         * Object containing the specification for the API to generate. Corresponds to a specific version of the QIX Engine API.
         */
        schema: object;
        /**
         * String containing a proper websocket URL to QIX Engine.
         */
        url: string;
        /**
         * A function to use when instantiating the WebSocket, mandatory for Node.js.
         */
        createSocket?: any;
        /**
         * ES6-compatible Promise library.
         */
        Promise?: any;
        /**
         * Set to true if the session should be suspended instead of closed when the websocket is closed.
         */
        suspendOnClose?: boolean;
        /**
         * Mixins to extend/augment the QIX Engine API.
         * See Mixins section for more information how each entry in this array should look like.
         * Mixins are applied in the array order.
         */
        mixins?: IMixin[];
        /**
         * Interceptors for augmenting requests before they are sent to QIX Engine.
         * See Interceptors section for more information how each entry in this array should look like.
         * Interceptors are applied in the array order.
         */
        requestInterceptors?: IRequestInterceptors[];
        /**
         * Interceptors for augmenting responses before they are sent to QIX Engine.
         * See Interceptors section for more information how each entry in this array should look like.
         * Interceptors are applied in the array order.
         */
        responseInterceptors?: IResponseInterceptors[];
        /**
         * An object containing additional JSON-RPC request parameters.
         * protocol.delta :  Set to false to disable the use of the bandwidth-reducing delta protocol.
         */
        protocol?: any;
    }

    interface ISession {
        /**
         * Establishes the websocket against the configured URL. Eventually resolved with the QIX global interface when the connection has been established.
         * @return Promise.
         */
        open<T extends IGeneratedAPI>(): Promise<T>;

        /**
         * Closes the websocket and cleans up internal caches, also triggers the closed event on all generated APIs.
         * Eventually resolved when the websocket has been closed.
         *
         * Note: you need to manually invoke this when you want to close a session and config.suspendOnClose is true.
         * @return Promise.
         */
        close(): Promise<any>;

        /**
         * Suspends the enigma.js session by closing the websocket and rejecting all method calls until it has been resumed again.
         * @return Promise.
         */
        suspend(): Promise<any>;

        /**
         * Resume a previously suspended enigma.js session by re-creating the websocket and, if possible, re-open the document
         * as well as refreshing the internal caches. If successful, changed events will be triggered on all generated APIs,
         * and on the ones it was unable to restore, the closed event will be triggered.
         * @param onlyIfAttached onlyIfAttached can be used to only allow resuming if the QIX Engine session was reattached properly.
         * @return Promise.
         * Note: Eventually resolved when the websocket (and potentially the previously opened document, and generated APIs) has been restored,
         * rejected when it fails any of those steps, or when onlyIfAttached is true and a new QIX Engine session was created.
         */
        resume(onlyIfAttached?: boolean): Promise<any>;

        /**
         * Handle opened state. This event is triggered whenever the websocket is connected and ready for communication.
         *
         * Handle closed state. This event is triggered when the underlying websocket is closed and config.suspendOnClose is false.
         *
         * Handle suspended state. This event is triggered in two cases (listed below). It is useful in scenarios where you for example
         * want to block interaction in your application until you are resumed again.
         * If config.suspendOnClose is true and there was a network disconnect (socked closed)
         * If you ran session.suspend()
         * The evt.initiator value is a string indicating what triggered the suspended state. Possible values: network, manual.
         *
         * Handle resumed state. This event is triggered when the session was properly resumed.
         * It is useful in scenarios where you for example can close blocking modal dialogs and allow the user to interact with your application again.
         *
         * notification:*
         * @param event - Event that triggers the function
         * @param func - Called function
         */
        on(event: "opened" | "closed" | "suspended" | "resumed" | string, func: any): void;
    }

    interface IGeneratedAPI {
        /**
         * This property contains the unique identifier for this API.
         */
        id: string;

        /**
         * This property contains the schema class name for this API.
         */
        type: string;

        /**
         * Despite the name, this property corresponds to the qInfo.qType property on your generic object's properties object.
         */
        genericType: string;

        /**
         * This property contains a reference to the session that this API belongs to.
         */
        session: ISession;

        /**
         * This property contains the handle QIX Engine assigned to the API.
         * Used internally in enigma.js for caches and JSON-RPC
         */
        handle: number;

        /**
         * register a function for events
         * @param event - function called if this event occures
         * @param func - function that is called
         */
        on(event: "changed" | "closed", func: () => void): void;

        /**
         * manual emit an events
         * @param event - event that occures
         */
        emit(event: "changed" | "closed"): void;
    }
}