import React, { Component } from 'react';
import styles from './root.less';

const envVars = require('config');

import { GoogleLogin } from 'react-google-login';

import { Button } from '@material-ui/core';
import { Send } from '@material-ui/icons';

const INITIAL_COMMAND_STATE = {
  command: 'default',
  commandInput: '',
  commandIcon: envVars.DEFAULT_LOGO,
  commandInputPlaceholder: 'Do Everything You Want',
  commandComplete: false,
  commandProcessedData: null
};

class MainCommand extends Component {
  state = {
    googleAccessToken: null,
    googleAuthUser: null,
    ...INITIAL_COMMAND_STATE
  };

  componentWillMount() {
    gapi.load('client:auth2', () => {
      gapi.client.init({
        apiKey: envVars.GOOGLE_API_KEY,
        clientId: envVars.OAUTH2_CLIENT_ID,
        discoveryDocs: [
          'https://www.googleapis.com/discovery/v1/apis/gmail/v1/rest'
        ],
        scope: 'profile email https://mail.google.com/'
      });
      // .then(
      //   function() {
      //     console.log('properly initialized gapi and client and auth2');
      //     gapi.auth2
      //       .getAuthInstance()
      //       .signIn()
      //       .then(() => {
      //         // getting all messages example
      //         // var messageRequest = gapi.client.gmail.users.messages.get({
      //         //   userId: 'me',
      //         //   id: '16b854db03a69932',
      //         //   format: 'full'
      //         // });
      //         // messageRequest.execute(function(response) {
      //         //   console.log(response);
      //         // });

      //       });
      //   },
      //   function(error) {
      //     appendPre(JSON.stringify(error, null, 2));
      //   }
      // );
    });
  }

  googleSignIn = async e => {
    await console.log('Going through sign in flow');
    const signInResponse = await gapi.auth2.getAuthInstance().signIn();

    await console.log('Sign in response', signInResponse);

    this.setState({
      googleAccessToken: signInResponse.Zi.access_token,
      googleAuthUser: signInResponse.w3
    });
  };

  handleInputChange = e => {
    if (e.key === 'Enter') this.handleSubmitCommand(e);
    else {
      var newInput = e.target.value;
      var newCommand = this.state.command;
      var newCommandIcon = this.state.commandIcon;
      var newCommandInputPlaceholder = this.state.commandInputPlaceholder;
      var newCommandComplete = this.state.commandComplete;
      var newCommandProcessedData = this.state.commandProcessedData;

      // TODO: helper function to properly change properties
      if (
        newInput.includes('gmail') &&
        newCommandIcon == envVars.DEFAULT_LOGO
      ) {
        newCommand = 'gmail';
        newCommandIcon =
          'https://image.flaticon.com/icons/png/512/281/281769.png';
        newInput = newInput.replace('gmail', '');
        newCommandInputPlaceholder = 'to | subject | message';
      }

      // TODO: helper function to check if input complete and show submit button
      if (newCommand == 'gmail') {
        const gmailSendParts = newInput.split('|');
        if (gmailSendParts.length == 3) {
          newCommandComplete = true;
          newCommandProcessedData = gmailSendParts;
        }
      }

      this.setState({
        command: newCommand,
        commandInput: newInput,
        commandIcon: newCommandIcon,
        commandInputPlaceholder: newCommandInputPlaceholder,
        commandComplete: newCommandComplete,
        commandProcessedData: newCommandProcessedData
      });
    }
  };

  handleSubmitCommand = e => {
    // TODO: make executing api calls modular with helpers/services
    const processedData = this.state.commandProcessedData;

    if (this.state.command == 'gmail') {
      const message =
        `From: ${this.state.googleAuthUser.U3}\r\n` +
        `To: ${processedData[0]}\r\n` +
        `Subject: ${processedData[1]}\r\n\r\n` +
        `${processedData[2]}`;
      // The body needs to be base64url encoded.
      const encodedMessage = btoa(message);
      const reallyEncodedMessage = encodedMessage
        .replace(/\+/g, '-')
        .replace(/\//g, '_')
        .replace(/=+$/, '');

      var sendEmail = gapi.client.gmail.users.messages.send({
        userId: 'me',
        resource: {
          // same response with any of these
          raw: reallyEncodedMessage
          // raw: encodedMessage
          // raw: message
        }
      });
      sendEmail.execute(function(response) {
        console.log('Sent the Email!', response);
      });
    }

    this.setState(INITIAL_COMMAND_STATE, () => console.log(this.state));
  };

  render() {
    const {
      googleAccessToken,
      commandInput,
      commandInputPlaceholder,
      commandIcon,
      commandComplete
    } = this.state;

    return (
      <div className={styles.searchCont}>
        {googleAccessToken == null ? (
          <div className={styles.googleButton} onClick={this.googleSignIn}>
            <img
              className={styles.googleLogo}
              width="20px"
              alt='Google "G" Logo'
              src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Google_%22G%22_Logo.svg/512px-Google_%22G%22_Logo.svg.png"
            />
            Login with Google
          </div>
        ) : (
          <React.Fragment>
            <img className={styles.commandIcon} src={commandIcon} />
            <input
              value={commandInput}
              onChange={this.handleInputChange}
              onKeyPress={this.handleInputChange}
              className={styles.searchBar}
              placeholder={commandInputPlaceholder}
            />
          </React.Fragment>
        )}

        {commandComplete && (
          <Button
            variant="contained"
            color="primary"
            className={styles.submitButton}
            onClick={this.handleSubmitCommand}
          >
            Send
            {/* This Button uses a Font Icon, see the installation instructions in the docs. */}
            <Send />
          </Button>
        )}
      </div>
    );
  }
}

export default MainCommand;