/*--------------------------------------------------------------------------------------------------------------
 *  Copyright (c) insite-gmbh. All rights reserved.
 *  Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------------------------*/
import { Observable } from 'rxjs/Rx';
import { Injectable } from '@angular/core';
import { Http, Headers, Response } from '@angular/http';
import { InaxConfiguration, ProfileService, Result} from '../../../@inax/common';


@Injectable()
/**
 * Service class to communicate with inax to handle excel read and write operations.
 * @class InaxExcelService
 * @classdesc Service class to communicate with inax to handle excel read and write operations.
 * @author insite-gmbh
 */
export class InaxExcelService {

    /**
     * constructor.
     * @param {Http} _http http service to handle web api calls.
     * @param {Configuration} _configuration configuration specifies signalRHubs, serveraddress,... .
     * @param {ProfileService} _profileService this service adds authentication data to the webApiRequests.
    */
    constructor(private _http: Http,
        private _configuration: InaxConfiguration,
        private _profileService: ProfileService) {
    }

    /***********************************************************************
     *          WEB API
     * ********************************************************************/


    /**
     * Determine all sheet names of the workbook.
     * @method sheets
     * @param {string} bookname This parameter is the name of the workbook.(Filename)
     * @return {Observable<boolean>} returns a Observable which is called with a list of the existing sheet 
     * names when the operation was finished.
     */
    public sheets(bookname: string): Observable<Result<string>> {
        let accessUrl = this._configuration.buildRestUrl("Excel","GetSheets") + "?bookName=" + bookname;
        let headers = this._profileService.addAuthorization(new Headers());
        return this._http.get(accessUrl, { headers }).map(res => res.json());
    }

    /**
     * Create a new sheet and/or a new workbook (File)
     * @method create
     * @param {string} bookname This parameter is the name of the workbook.(Filename)
     * @param {string} sheetName This parameter is the name of the sheet we want to create.
     * @return {Observable<Response>} returns a http response to see if the operation succeeded.
     */
    public create(bookName:string, sheetName:string): Observable<Response> {
        let accessUrl = this._configuration.buildRestUrl("Excel","Create") + "?bookName=" + bookName + "&sheetName=" + sheetName;
        let headers = this._profileService.addAuthorization(new Headers());
        return this._http.post(accessUrl, null, { headers });
    }

    /**
     * read a given datareference (for details see documentation of the matrix modul)
     * @method read
     * @param {string} dataRef specifies the read operation
     * @return {Observable<Result<any>>} returns the read result when the operation finished.
     */
    public read(dataRef:string): Observable<Result<any>> {
        let accessUrl = this._configuration.buildRestUrl("Excel","Read") + "?dataRef=" + dataRef;
        let headers = this._profileService.addAuthorization(new Headers());
        return this._http.get(accessUrl, { headers }).map(res => res.json());
    }

    /**
     * write a value to the given datareference (for details see documentation of the matrix modul)
     * @method write
     * @param {string} dataRef specifies the write operation.
     * @param {string} val the data to write.
     * @return {Observable<Response>} returns a http response to see if the operation succeeded.
     */
    public write(dataRef:string, val:any): Observable<Response> {
        let accessUrl = this._configuration.buildRestUrl("Excel","Write");
        let headers = this._profileService.addAuthorization(new Headers());
        return this._http.post(accessUrl, val, { headers });
    }
}