import React, { Component } from 'react';

import { connect } from 'react-redux';

import { bindActionCreators } from 'redux';

import { Panel, FormGroup, ControlLabel, FormControl } from 'react-bootstrap';

import GroupForm from './GroupForm';

import '../App.css';

import * as sessionsActions from '../actions/sessionsActions';

import * as authActions from '../actions/authActions';

import _ from 'lodash';

class SessionForm extends Component {

  state = {

    createGroup: false

  }

  onChange = (e) => {

    const { name, value } = e.target;

    const changes = { [name]: value }

    this.onChangeThrottle(changes);

  }

  onChangeThrottle = _.debounce((changes) => {

    this.props.sessionsActions.updateSession(this.props.currentSession, changes);

  }, 750)

  onGroupChange = (e) => {

    const groupName = e.target.value;

    const group = this.props.groups.find((g) => g.get('name') === groupName);

    this.props.sessionsActions.updateSession(this.props.currentSession, { group: groupName, protocol: group?group.get('protocol'):'' });

  }

  componentWillUpdate = (nextProps, nextState) => {

    if (nextState.createGroup && nextProps.createGroup.get('success')) {

      this.setState({ createGroup: false })

    }

  }

  render() {

    if (!this.props.currentSession) {

      return (

        <form></form>

      )

    }

    return (

      <Panel>

        <form onSubmit={ e => { e.preventDefault() } }>

          <FormGroup>

            <ControlLabel>Title</ControlLabel>

            <FormControl

              name="title"

              defaultValue={ this.props.currentSession.title }

              onChange={ this.onChange }

              type="text"

              placeholder="Enter a title"

            />

          </FormGroup>

          <FormGroup>

            <ControlLabel>Description</ControlLabel>

            <FormControl

              name="description"

              componentClass="textarea"

              defaultValue={ this.props.currentSession.description }

              onChange={ this.onChange }

              placeholder="Enter a description"

            />

          </FormGroup>

          <FormGroup>

            <ControlLabel>Group</ControlLabel>

            <FormControl

              name="group"

              componentClass="select"

              value={ this.props.group ? this.props.group.get('name') : '' }

              onChange={ this.onGroupChange }>

              { this.props.groups.map((group, key) =>

                <option key={ key } value={ group.get('name') }>{ group.get('name') }</option>

              ) }

            </FormControl>

          </FormGroup>

            <GroupForm session={this.props.session} />

          </FormGroup>

        </form>

      </Panel>

    );

  }

}

function mapStateToProps(state, props) {

  let group;

  if (props.session && props.session.get('group')) {

    group = state.get('groups').find(group => props.session.get('group') === group.get('name'))

  }

  return {

    currentSession: props.session,

    createGroup: state.get('createGroup'),

    groups: state.get('groups'),

    group

  };

}

function mapDispatchToProps(dispatch) {

  return {

    sessionsActions: bindActionCreators(sessionsActions, dispatch),

    authActions: bindActionCreators(authActions, dispatch),

  }

}

export default connect(mapStateToProps, mapDispatchToProps)(SessionForm);