import { Answerable, AnswersQuestions, CollectsArtifacts, Interaction, UsesAbilities } from '@serenity-js/core';
import { Artifact, HTTPRequestResponse, Name, RequestAndResponse } from '@serenity-js/core/lib/model';
import { AxiosRequestConfig, AxiosResponse } from 'axios';
import { CallAnApi } from '../abilities';

/**
 * @desc
 *  Sends a {@link HTTPRequest} to a specified url.
 *  The response to the request is made available via the {@link LastResponse}
 *  {@link @serenity-js/core/lib/screenplay~Question}s.
 *
 * @example <caption>Send a GET request</caption>
 *  import { Actor } from '@serenity-js/core';
 *  import { CallAnApi, GetRequest, LastResponse, Send } from '@serenity-js/rest'
 *  import { Ensure, equals } from '@serenity-js/assertions';
 *
 *  const actor = Actor.named('Apisit').whoCan(CallAnApi.at('https://myapp.com/api'));
 *
 *  actor.attemptsTo(
 *      Send.a(GetRequest.to('/books/0-688-00230-7')),
 *      Ensure.that(LastResponse.status(), equals(200)),
 *  );
 *
 * @extends {Interaction}
 */
export class Send extends Interaction {

    /**
     * @desc
     *  Instantiates a new {@link Send} {@link @serenity-js/core/lib/screenplay~Interaction}.
     *
     * @param {@serenity-js/lib/core/screenplay~Answerable<AxiosRequestConfig>} request
     * @returns {@serenity-js/core/lib/screenplay~Interaction}
     */
    static a(request: Answerable<AxiosRequestConfig>): Interaction {
        return new Send(request);
    }

    /**
     * @param {@serenity-js/core/lib/screenplay~Answerable<AxiosRequestConfig>} request
     */
    constructor(private readonly request: Answerable<AxiosRequestConfig>) {
        super();
    }

    /**
     * @desc
     *  Makes the provided {@link @serenity-js/core/lib/screenplay/actor~Actor}
     *  perform this {@link @serenity-js/core/lib/screenplay~Interaction}.
     *
     * @param {@serenity-js/core/lib/screenplay/actor~UsesAbilities & @serenity-js/core/lib/screenplay/actor~CollectsArtifacts & @serenity-js/core/lib/screenplay/actor~AnswersQuestions} actor
     * @returns {Promise<void>}
     *
     * @see {@link @serenity-js/core/lib/screenplay~Actor}
     */
    performAs(actor: UsesAbilities & CollectsArtifacts & AnswersQuestions): Promise<void> {
        return actor.answer(this.request)
            .then(config => CallAnApi.as(actor).request(config))
            .then((response: AxiosResponse) => actor.collect(
                this.responseToArtifact(response),
                this.requestToArtifactName(response.config),
            ));
    }

    /**
     * @desc
     *  Generates a description of the REST interaction
     *
     * @returns {string}
     *  Description of the {@link @serenity-js/core/lib/screenplay~Interaction}
     */
    toString() {
        return `#actor sends ${ this.request.toString() }`;
    }

    private responseToArtifact(response: AxiosResponse): Artifact {
        const
            request: AxiosRequestConfig = response.config,
            requestAndResponse: RequestAndResponse = {
                request: {
                    method: request.method,
                    url: request.url,
                    headers: request.headers,
                    data: request.data,
                },
                response: {
                    status: response.status,
                    headers: response.headers,
                    data: response.data,
                },
            };

        return HTTPRequestResponse.fromJSON(requestAndResponse);
    }

    private requestToArtifactName(request: AxiosRequestConfig) {
        return new Name(`request ${request.method} ${request.url}`);
    }
}