'use strict';
/**
 * @file requestInfo
 * @author baiduAip
 */
const HttpHeader = require('../const/httpHeader');

const CloudAuth = require('../auth/cloudAuth');

const HOST_DEFAULT = 'aip.baidubce.com';

const CONTENT_TYPE_FORMDEFAULT = 'application/x-www-form-urlencoded';

const SYMBOL_QUERYSTRING_PREFIX = '&aipSdk=node&access_token=';

const SYMBOL_QUERYSTRING_PREFIX_BCE = '?aipSdk=node';

const SYMBOL_HTTPS_PREFIX = 'https://';
const SYMBOL_HTTP_PREFIX = 'http://';

 /**
 * RequestInfo类
 * 构造供request库调用的请求信息对象
 *
 * @constructor
 */
class RequestInfo {
    constructor(path, scope, params, method, isHttp) {
        this.isHttp = isHttp || false;
        this.method = method;
        this.host = HOST_DEFAULT;
        this.path = path;
        this.scope = scope;
        this.params = params;
        this.createDate = new Date();
        this.devAccessToken = null;
        this.initCommonHeader();
    }
    initCommonHeader() {
        this.headers = {};
        this.headers[HttpHeader.HOST] = this.host;
        this.headers[HttpHeader.CONTENT_TYPE] = CONTENT_TYPE_FORMDEFAULT;
    }
    setHost(host) {
        this.host = host;
        this.headers[HttpHeader.HOST] = this.host;
    }
    getAccessToken() {
        if (this.devAccessToken !== null) {
            return this.devAccessToken.token;
        }
        return null;
    }
    makeDevOptions(devAccessToken) {
        this.devAccessToken = devAccessToken;
        this.path += SYMBOL_QUERYSTRING_PREFIX + devAccessToken.token;
    }
    makeBceOptions(ak, sk) {
        let cloudAuth = new CloudAuth(ak, sk);
        this.headers[HttpHeader.BCE_DATE] = this.getUTCDateStr();
        let signature = cloudAuth.getAuthorization(this.method,
            this.getTestPath(), {redirect_uri: this.path}, this.headers, this.createDate.getTime());
        this.headers[HttpHeader.BCE_AUTHORIZATION] = signature;
    }
    getUTCDateStr() {
        let dateStrUTC = this.createDate.toISOString().replace(/\.\d+Z$/, 'Z');
        return dateStrUTC;
    }
    getUrl() {
        if (this.isHttp) {
            return this.getHttpUrl();
        }
        return this.getHttpsUrl();
    }
    getHttpsUrl() {
        let path;
        if (this.getTestPath()) {
            path = this.getTestPath() + '?redirect_uri=' + this.path;
        } else {
            return SYMBOL_HTTPS_PREFIX + this.host + this.path + SYMBOL_QUERYSTRING_PREFIX_BCE;
        }
        return SYMBOL_HTTPS_PREFIX + this.host + path;
    }
    getPureUrl() {
        return this.getUrl().split('?')[0];
    }
    getHttpUrl() {
        return SYMBOL_HTTP_PREFIX + this.host + this.path;
    }
    getTestPath() {
        let sp = this.path.split('/')[1];
        if (sp === 'rest') {
            return '/rest/2.0/test/v1/test';
        }
        if (sp === 'rpc') {
            return '/rpc/2.0/test/v1/test';
        }
    }
 }

module.exports = RequestInfo;