export class PhoneProviderGeetestCaptcha {
    constructor() {
        this._captchaObj = null;
        this._shouldCallCaptcha = false;
        this._onSuccess = null;
        this._onError = null;

        this.realmUrl = config.get('realmUrl');

        fetch(this.realmUrl + '/geetest/code').then((res) => {
            if (res.ok) {
                return res.json();
            } else {
                throw msg.text('captcha-code-api-error');
            }
        }).then((data) => {
            initGeetest({
                gt: data.gt,
                challenge: data.challenge,
                offline: !data.success,
                new_captcha: true,
                product: 'bind',
                lang: msg.textOrNull('geetestCaptchaLangCode') || 'en'
            }, (obj) => {
                this._captchaObj = obj;
                if (this._shouldCallCaptcha) { //加载完成后立刻调用
                    this._captchaObj.verify();
                    this._captchaObj.onSuccess(this.buildOnSuccess(this._onSuccess));
                    this._shouldCallCaptcha = false;
                    this._onSuccess = null;
                    this._onError = null;
                }
            })
        });
    }

    verify() {
        return new Promise((resolve, reject) => {
            if (!this._captchaObj) {
                this._shouldCallCaptcha = true;
                this._onSuccess = resolve;
                this._onError = reject;
            } else { //已经加载成功的情况，直接调用
                this._captchaObj.verify();
                this._captchaObj.onSuccess(this.buildOnSuccess(resolve));
                this._captchaObj.onError((err) => {
                    alert(msg.text('captcha-load-error'));
                    reject('error', err);
                });

                this._captchaObj.onClose(() => {
                    reject('close');
                });
            }
        });
    }

    buildOnSuccess(callback) {
        return (function() {
            var result = this._captchaObj.getValidate();
            callback(result);
            this._captchaObj.reset();
        }).bind(this);
    }
}