import React, { Component } from 'react';
import i18next from 'i18next';
import qrcode from 'qrcode-generator';

import apiManager from '../lib/APIManager';
import messageDispatcher from '../lib/MessageDispatcher';
import Notification from '../lib/Notification';

class SchemeOTP extends Component {
  constructor(props) {
    super(props);

    this.state = {
      config: props.config,
      module: props.module,
      name: props.name,
      profile: props.profile,
      schemePrefix: props.schemePrefix,
      myOtp: false,
      errorList: {},
      otpUrl: false,
      qrcode: "",
      allowHotp: false,
      allowTotp: false,
      showForbidMessage: false
    };
    
    this.getRegister = this.getRegister.bind(this);
    this.register = this.register.bind(this);
    this.changeParam = this.changeParam.bind(this);
    this.changeType = this.changeType.bind(this);
    this.generateSecret = this.generateSecret.bind(this);
    this.showQRCode = this.showQRCode.bind(this);
    
    this.getRegister();
  }

  componentWillReceiveProps(nextProps) {
    this.setState({
      config: nextProps.config,
      module: nextProps.module,
      name: nextProps.name,
      profile: nextProps.profile,
      schemePrefix: nextProps.schemePrefix
    }, () => {
      this.getRegister();
    });
  }
  
  getRegister() {
    if (this.state.profile) {
      apiManager.glewlwydRequest(this.state.schemePrefix+"/scheme/register/", "PUT", {username: this.state.profile.username, scheme_type: this.state.module, scheme_name: this.state.name})
      .then((res) => {
        var myOtp;
        if (res.type === "NONE" || !res.type) {
          myOtp = {
            type: "NONE",
            secret: "",
            moving_factor: 0,
            time_step_size: res["totp-window"]
          };
        } else {
          myOtp = res;
        }
        this.setState({showForbidMessage: false, myOtp: myOtp, allowHotp: res["hotp-allow"], allowTotp: res["totp-allow"]});
      })
      .fail((err) => {
        if (err.status === 401) {
          messageDispatcher.sendMessage('App', {type: "loggedIn", loggedIn: false});
        } else if (err.status === 403) {
          this.setState({showForbidMessage: true});
        } else {
          messageDispatcher.sendMessage('Notification', {type: "danger", message: i18next.t("error-api-connect")});
        }
      })
      .always(() => {
        this.showQRCode();
      });
    }
  }
  
  showQRCode() {
    var url = false;
    if (this.state.myOtp.issuer && this.state.profile.username && this.state.myOtp.secret && this.state.myOtp.digits) {
      if (this.state.myOtp.type === "HOTP" && this.state.myOtp.moving_factor !== undefined) {
        url = "otpauth://hotp/" + encodeURIComponent(this.state.myOtp.issuer) + ":" + encodeURIComponent(this.state.profile.username) + "?" +
                  "issuer=" + encodeURIComponent([location.protocol, '//', location.host].join('')) + "&" +
                  "secret=" + encodeURIComponent(this.state.myOtp.secret) + "&" +
                  "digits=" + this.state.myOtp.digits + "&" +
                  "algorithm=SHA1&" +
                  "counter=" + this.state.myOtp.moving_factor;
      } else if (this.state.myOtp.type === "TOTP" && this.state.myOtp.time_step_size) {
        url = "otpauth://totp/" + encodeURIComponent(this.state.myOtp.issuer) + ":" + encodeURIComponent(this.state.profile.username) + "?" +
                  "issuer=" + encodeURIComponent([location.protocol, '//', location.host].join('')) + "&" +
                  "secret=" + encodeURIComponent(this.state.myOtp.secret) + "&" +
                  "digits=" + this.state.myOtp.digits + "&" +
                  "algorithm=SHA1&" +
                  "period=" + this.state.myOtp.time_step_size;
      }
    }
    if (url) {
      var qr = qrcode(0, 'L');
      qr.addData(url);
      qr.make();
      this.setState({otpUrl: url, qrcode: qr.createDataURL(4)});
    } else {
      this.setState({otpUrl: false, qrcode: ""});
    }
  }
  
  changeParam(e, param, number) {
    var myOtp = this.state.myOtp;
    if (number) {
      myOtp[param] = parseInt(e.target.value);
    } else {
      myOtp[param] = e.target.value;
    }
    this.setState({myOtp: myOtp}, () => {
      this.showQRCode();
    });
  }
  
  changeType(e, type) {
    e.preventDefault();
    var myOtp = this.state.myOtp;
    myOtp.type = type;
    this.setState({myOtp: myOtp}, () => {
      this.showQRCode();
    });
  }
  
  generateSecret() {
    apiManager.glewlwydRequest(this.state.schemePrefix+"/scheme/register/", "POST", 
      {
        username: this.state.profile.username, 
        scheme_type: this.state.module, 
        scheme_name: this.state.name,
        value: {
          "generate-secret": true
        }
      })
    .then((res) => {
      var myOtp = this.state.myOtp;
      myOtp.secret = res.secret;
      this.setState({myOtp: myOtp}, () => {
        this.showQRCode();
        this.register();
      });
    })
    .fail((err) => {
      if (err.status === 401) {
        messageDispatcher.sendMessage('App', {type: "loggedIn", loggedIn: false});
      } else {
        messageDispatcher.sendMessage('Notification', {type: "danger", message: i18next.t("error-api-connect")});
      }
    });
  }
  
  register() {
    var errorList = {}, hasError = false;
    if (this.state.myOtp.type !== "NONE") {
      if (!this.state.myOtp.secret) {
        errorList.secret = i18next.t("profile.scheme-otp-secret-error");
        hasError = true;
      }
      if (this.state.myOtp.type === "HOTP") {
        if (this.state.myOtp.moving_factor === "" || this.state.myOtp.moving_factor === undefined) {
          errorList.moving_factor = i18next.t("profile.scheme-otp-moving_factor-error");
          hasError = true;
        }
      } else if (this.state.myOtp.type === "TOTP") {
        if (this.state.myOtp.time_step_size === "" || this.state.myOtp.time_step_size === undefined) {
          errorList.time_step_size = i18next.t("profile.scheme-otp-time_step_size-error");
          hasError = true;
        }
        if (this.state.myOtp.start_offset === "") {
          errorList.start_offset = i18next.t("profile.scheme-otp-start_offset-error");
          hasError = true;
        }
      }
    }
    this.setState({errorList: errorList}, () => {
      if (!hasError) {
        apiManager.glewlwydRequest(this.state.schemePrefix+"/scheme/register/", "POST", 
          {
            username: this.state.profile.username, 
            scheme_type: this.state.module, 
            scheme_name: this.state.name,
            value: this.state.myOtp
          })
        .then((res) => {
          messageDispatcher.sendMessage('Notification', {type: "info", message: i18next.t("profile.scheme-otp-save-ok")});
          this.getRegister();
          if (this.state.config.params.register) {
            messageDispatcher.sendMessage('App', {type: "registration"});
          }
        })
        .fail((err) => {
          if (err.status === 400) {
            messageDispatcher.sendMessage('Notification', {type: "danger", message: i18next.t("profile.scheme-otp-save-error")});
          } else if (err.status === 401) {
            messageDispatcher.sendMessage('App', {type: "loggedIn", loggedIn: false});
          } else {
            messageDispatcher.sendMessage('Notification', {type: "danger", message: i18next.t("error-api-connect")});
          }
        });
      }
    });
  }
  
	render() {
    var jsxHOTP, jsxTOTP, secretJsx, jsxHotpOption, jsxTotpOption, jsxQrcode, jsxForbidMessage, bottomButtonJsx;
    secretJsx = 
      <div className="row">
        <div className="col-md-12">
          <div className="input-group input-group-sm mb-3">
            <div className="input-group-prepend">
              <span className="input-group-text">{i18next.t("profile.scheme-otp-secret")}</span>
            </div>
            <input type="text"
                   maxLength="128"
                   className={!!this.state.errorList.secret?"form-control is-invalid":"form-control"}
                   id="scheme-otp-secret" onChange={(e) => this.changeParam(e, "secret")}
                   value={this.state.myOtp.secret}
                   placeholder={i18next.t("profile.scheme-otp-secret-ph")} />
            <div className="input-group-append">
              <button type="button" className="btn btn-outline-secondary" onClick={this.register}>{i18next.t("profile.scheme-otp-save")}</button>
            </div>
            {!!this.state.errorList.secret?<span className="error-input">{this.state.errorList.secret}</span>:""}
          </div>
        </div>
      </div>
    if (this.state.myOtp.type === "HOTP") {
      jsxHOTP = <div>
        {secretJsx}
        <div className="row">
          <div className="col-md-12">
            <div className="input-group input-group-sm mb-3">
              <div className="input-group-prepend">
                <span className="input-group-text">{i18next.t("profile.scheme-otp-moving_factor")}</span>
              </div>
              <input type="number" min="0" step="1" className={!!this.state.errorList.moving_factor?"form-control is-invalid":"form-control"} id="scheme-otp-moving_factor" onChange={(e) => this.changeParam(e, "moving_factor", 1)} value={this.state.myOtp.moving_factor} placeholder={i18next.t("profile.scheme-otp-moving_factor-ph")} />
              {!!this.state.errorList.moving_factor?<span className="error-input">{this.state.errorList.moving_factor}</span>:""}
            </div>
          </div>
        </div>
      </div>
      bottomButtonJsx = <button className="btn btn-primary" type="button" onClick={this.generateSecret}>{i18next.t("profile.scheme-otp-generate-secret")}</button>
    } else if (this.state.myOtp.type === "TOTP") {
      jsxTOTP = <div>
        {secretJsx}
        <div className="row">
          <div className="col-md-12">
            <div className="input-group input-group-sm mb-3">
              <div className="input-group-prepend">
                <span className="input-group-text">{i18next.t("profile.scheme-otp-time_step_size")}</span>
              </div>
              <input type="number" min="0" step="1" className={!!this.state.errorList.time_step_size?"form-control is-invalid":"form-control"} id="scheme-otp-time_step_size" onChange={(e) => this.changeParam(e, "time_step_size", 1)} value={this.state.myOtp.time_step_size} placeholder={i18next.t("profile.scheme-otp-time_step_size-ph")} />
              {!!this.state.errorList.time_step_size?<span className="error-input">{this.state.errorList.time_step_size}</span>:""}
            </div>
          </div>
        </div>
      </div>
      bottomButtonJsx = <button className="btn btn-primary" type="button" onClick={this.generateSecret}>{i18next.t("profile.scheme-otp-generate-secret")}</button>
    } else {
      bottomButtonJsx = <button className="btn btn-primary" type="button" onClick={this.register}>{i18next.t("profile.scheme-otp-save")}</button>
    }
    if (this.state.allowHotp) {
      jsxHotpOption = <a className={"dropdown-item"+(this.state.myOtp.type==="HOTP"?" active":"")} href="#" onClick={(e) => this.changeType(e, "HOTP")}>{i18next.t("profile.scheme-otp-type-HOTP")}</a>;
    }
    if (this.state.allowTotp) {
      jsxTotpOption = <a className={"dropdown-item"+(this.state.myOtp.type==="TOTP"?" active":"")} href="#" onClick={(e) => this.changeType(e, "TOTP")}>{i18next.t("profile.scheme-otp-type-TOTP")}</a>;
    }
    if (this.state.otpUrl) {
      jsxQrcode = 
        <div className="row">
          <div className="col-md-4">
            <a href={this.state.otpUrl} title={this.state.otpUrl}>
              <img src={this.state.qrcode} alt="otp" />
            </a>
          </div>
          <div className="col-md-8 v-center">
            <h4>
              {i18next.t("profile.scheme-otp-scan-qrcode-message")}
            </h4>
          </div>
        </div>
    }
    if (this.state.showForbidMessage) {
      jsxForbidMessage = <h4 className="alert alert-danger">{i18next.t("profile.scheme-register-forbidden")}</h4>
    }

    return (
      <div>
        <div className="row">
          <div className="col-md-12">
            <h4>{i18next.t("profile.scheme-otp-title")}</h4>
          </div>
        </div>
        <div className="row">
          <div className="col-md-12">
            <div className="input-group input-group-sm mb-3">
              <div className="input-group-prepend">
                <span className="input-group-text">{i18next.t("profile.scheme-otp-type")}</span>
              </div>
              <div className="dropdown">
                <button className="btn btn-secondary dropdown-toggle" type="button" id="scheme-otp-type" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
                  {i18next.t("profile.scheme-otp-type-" + (this.state.myOtp.type||"NONE"))}
                </button>
                <div className="dropdown-menu" aria-labelledby="scheme-otp-type">
                  {jsxTotpOption}
                  {jsxHotpOption}
                  <a className={"dropdown-item"+(this.state.myOtp.type==="NONE"?" active":"")} href="#" onClick={(e) => this.changeType(e, "NONE")}>{i18next.t("profile.scheme-otp-type-NONE")}</a>
                </div>
              </div>
            </div>
          </div>
        </div>
        {jsxHOTP}
        {jsxTOTP}
        {jsxQrcode}
        {jsxForbidMessage}
        <div className="row">
          <div className="col-md-12">
            <hr/>
          </div>
        </div>
        <div className="row">
          <div className="col-md-12">
            <div className="btn-group" role="group">
              {bottomButtonJsx}
            </div>
          </div>
        </div>
      </div>
    );
  }
}

export default SchemeOTP;
