// import { Client } from 'guzzle';
// import { Log } from '@adonisjs/core/build/standalone';
// import { DoiInterface } from './interfaces/DoiInterface';
import DoiClientContract from 'App/Library/Doi/DoiClientContract';
import DoiClientException from 'App/Exceptions/DoiClientException';
import { StatusCodes } from 'http-status-codes';
import Logger from '@ioc:Adonis/Core/Logger';
import axios, {AxiosResponse} from 'axios';

export class DoiClient implements DoiClientContract {
    username: string;
    password: string;
    serviceUrl: string;
    // prefix: string;
    // base_domain: string;

    constructor() {
        const datacite_environment = process.env.DATACITE_ENVIRONMENT || 'debug';
        if (datacite_environment === 'debug') {
            this.username = process.env.DATACITE_TEST_USERNAME || '';
            this.password = process.env.DATACITE_TEST_PASSWORD || '';
            this.serviceUrl = process.env.DATACITE_TEST_SERVICE_URL || '';
            // this.prefix = process.env.DATACITE_TEST_PREFIX || '';
            // this.base_domain = process.env.TEST_BASE_DOMAIN || '';
        } else if (datacite_environment === 'production') {
            this.username = process.env.DATACITE_USERNAME || '';
            this.password = process.env.DATACITE_PASSWORD || '';
            this.serviceUrl = process.env.DATACITE_SERVICE_URL || '';
            // this.prefix = process.env.DATACITE_PREFIX || '';
            // this.base_domain = process.env.BASE_DOMAIN || '';
        }
        if (this.username === '' || this.password === '' || this.serviceUrl === '') {
            const message = 'issing configuration settings to properly initialize DOI client';
            Logger.error(message);
            throw new DoiClientException(StatusCodes.BAD_REQUEST, message);
        }
    }

    /**
     * Creates a DOI with the given identifier
     *
     * @param doiValue The desired DOI identifier e.g. '10.5072/tethys.999',
     * @param xmlMeta
     * @param landingPageUrl e.g. https://www.tethys.at/dataset/1
     *
     * @return Promise<number> The http response in the form of a axios response
     */
    public async registerDoi(doiValue: string, xmlMeta: string, landingPageUrl: string): Promise<AxiosResponse<any>> {
        //step 1: register metadata via xml upload
        // state draft
        let response;
        let url = `${this.serviceUrl}/metadata/${doiValue}`; //https://mds.test.datacite.org/metadata/10.21388/tethys.213
        const auth = {
            username: this.username,
            password: this.password,
        };
        let headers = {
            'Content-Type': 'application/xml;charset=UTF-8',
        };
        try {
            response = await axios.put(url, xmlMeta, {
                auth,
                headers,
            });
        } catch (error) {
            const message = `request to ${url} failed with ${error.message}`;
            // Handle the error, log it, or rethrow as needed
            Logger.error(message);
            throw new DoiClientException(StatusCodes.SERVICE_UNAVAILABLE, message);
        }
        // let test = response.data; // 'OK (10.21388/TETHYS.213)'

        // Response Codes
        // 201 Created: operation successful
        // 401 Unauthorised: no login
        // 403 Forbidden: login problem, quota exceeded
        // 415 Wrong Content Type : Not including content type in the header.
        // 422 Unprocessable Entity : invalid XML
        if (response.status !== 201) {
            const message = 'unexpected DataCite MDS response code ' + response.status;
            // $this->log($message, 'err');
            throw new DoiClientException(response.status, message);
        }

        // step 2: Register the DOI name
        // // DOI und URL der Frontdoor des zugehörigen Dokuments übergeben: state findable
        // const url2 = this.serviceUrl + "/doi/" + doiValue;
        url = `${this.serviceUrl}/doi/${doiValue}`; //'https://mds.test.datacite.org/doi/10.21388/tethys.213'
        headers = {
            'Content-Type': 'text/plain;charset=UTF-8',
        };
        const data = `doi=${doiValue}\nurl=${landingPageUrl}`;
        try {
            response = await axios.put(url, data, {
                auth,
                headers,
            });

            // Access the response data using response.data
            // Do something with the response.data
        } catch (error) {
            const message = `request to ${url} failed with ${error.message}`;
            // Handle the error, log it, or rethrow as needed
            throw new DoiClientException(response.status, message);
        }
        // Response Codes
        // 201 Created: operation successful
        // 400 Bad Request: request body must be exactly two lines: DOI and URL; wrong domain, wrong prefix;
        // 401 Unauthorised: no login
        // 403 Forbidden: login problem, quota exceeded
        // 412 Precondition failed: metadata must be uploaded first.
        if (response.status != 201) {
            const message = 'unexpected DataCite MDS response code ' + response.status;
            Logger.error(message);
            throw new DoiClientException(response.status, message);
        }
        return response;
    }
}