/*
 * Copyright (c) 2019  InterDigital Communications, Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import _ from 'lodash';
import { connect } from 'react-redux';
import React, { Component } from 'react';
import { Select } from '@rmwc/select';
import { Grid, GridCell } from '@rmwc/grid';
import CancelApplyPair from '../../components/helper-components/cancel-apply-pair';

import { EXEC_EVT_MOB_TARGET, EXEC_EVT_MOB_DEST, DEST_DISCONNECTED } from '../../meep-constants';

import { getElemFieldVal, FIELD_NAME } from '../../util/elem-utils';

import {
  uiExecChangeMobilityEventTarget,
  uiExecChangeMobilityEventDestination,
  uiExecChangeEventStatus
} from '@/js/state/ui';

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

    this.state = {};
  }
  // shouldComponentUpdate(nextProps, nextState) {
  shouldComponentUpdate(nextProps) {
    /**
     * element={props.element}
        eventTypes={props.eventTypes}
        api={props.api}
        onSuccess={props.onSuccess}
        onClose={props.onClose}
        currentEvent={props.currentEvent}
        UEs={props.UEs}
        POAs={props.POAs}
        EDGEs={props.EDGEs}
        FOGs={props.FOGs}
        ZONEs={props.ZONEs}
        MobTypes={props.MobTypes}
        FogEdges={props.FogEdges}
        EdgeApps={props.EdgeApps}
     */
    return (
      this.props.api !== nextProps.api ||
      this.props.element !== nextProps.element ||
      this.props.api !== nextProps.api ||
      this.props.currentEvent !== nextProps.currentEvent ||
      this.props.UEs !== nextProps.UEs ||
      this.props.POAs !== nextProps.POAs ||
      this.props.EDGEs !== nextProps.EDGEs ||
      this.props.FOGs !== nextProps.FOGs ||
      this.props.ZONEs !== nextProps.ZONEs ||
      this.props.MobTypes !== nextProps.MobTypes ||
      this.props.FogEdges !== nextProps.FogEdges ||
      this.props.EdgeApps !== nextProps.EdgeApps ||
      this.props.mobilityEventTarget !== nextProps.mobilityEventTarget
    );
  }

  onMobilityPaneClose(e) {
    e.preventDefault();
    this.props.changeEventTarget('');
    this.props.changeEventDestination('');
    this.props.onClose(e);
  }

  /**
   * Callback function to receive the result of the sendEvent operation.
   * @callback module:api/EventsApi~sendEventCallback
   * @param {String} error Error message, if any.
   * @param data This operation does not return a value.
   * @param {String} response The complete HTTP response.
   */
  sendEventCb(error, _, response) {
    var status = '';
    if (error) {
      status = '[' + response.statusCode + '] ' + response.statusText + ': ' + response.text;
      this.props.changeEventStatus(status);
      return;
    }

    status = '[' + response.statusCode + '] ' + response.statusText;
    this.props.changeEventStatus(status);
    this.props.onSuccess();
  }

  triggerEvent(e) {
    e.preventDefault();
    var meepEvent = {
      name: 'name',
      type: this.props.currentEvent,
      eventMobility: {
        elementName: this.props.mobilityEventTarget,
        dest: this.props.mobilityEventDestination
      }
    };

    // Send Event
    this.props.api.sendEvent(this.props.currentEvent, meepEvent, (error, data, response) => {
      this.sendEventCb(error, data, response);
    });
  }

  render() {
    //let found = this.props.UEs.find(element => element.label == this.values.eventTarget);
    //find if its the selection was a UE, otherwise (in order) EDGE, FOG, EDGE-APP, UE-APP
    var target = this.props.mobilityEventTarget;
    var found = this.props.UEs.find(function(element) {
      return element.label === target;
    });

    var populateDestination;
    if (found !== undefined) {
      populateDestination = this.props.POAs;
    } else {
      found = this.props.EDGEs.find(function(element) {
        return element.label === target;
      });

      if (found !== undefined) {
        populateDestination = this.props.ZONEs;
      } else {
        found = this.props.FOGs.find(function(element) {
          return element.label === target;
        });
        if (found !== undefined) {
          populateDestination = this.props.POAs;
        } else {
          found = this.props.EdgeApps.find(function(element) {
            return element.label === target;
          });
          if (found !== undefined) {
            populateDestination = this.props.FogEdges;
          }
        }
      }
    }
    var destOptions = _.map(populateDestination, elem => getElemFieldVal(elem, FIELD_NAME));
    destOptions.push(DEST_DISCONNECTED);

    return (
      <div>
        <>
          <Grid style={styles.field}>
            <GridCell span="8">
              <Select
                style={styles.select}
                label="Target"
                outlined
                options={_.map(this.props.MobTypes, elem =>
                  getElemFieldVal(elem, FIELD_NAME)
                )}
                onChange={event => {
                  this.props.changeEventTarget(event.target.value);
                  this.props.changeEventDestination('');
                }}
                data-cy={EXEC_EVT_MOB_TARGET}
                value={this.props.mobilityEventTarget}
              />
            </GridCell>
            <GridCell span="4"></GridCell>
          </Grid>
          <Grid style={styles.block}>
            <GridCell span="8">
              <Select
                style={styles.select}
                label="Destination"
                outlined
                options={destOptions}
                onChange={event => {
                  this.props.changeEventDestination(event.target.value);
                }}
                data-cy={EXEC_EVT_MOB_DEST}
                value={this.props.mobilityEventDestination}
              />
            </GridCell>
            <GridCell span="4"></GridCell>
          </Grid>
          <CancelApplyPair
            cancelText="Close"
            applyText="Submit"
            onCancel={e => this.onMobilityPaneClose(e)}
            onApply={e => this.triggerEvent(e)}
            removeCyCancel={true}
          />
        </>
      </div>
    );
  }
}

const styles = {
  block: {
    marginBottom: 20
  },
  field: {
    marginBottom: 10
  },
  select: {
    width: '100%'
  }
};

const mapStateToProps = state => {
  return {
    mobilityEventTarget: state.ui.mobilityEventTarget,
    mobilityEventDestination: state.ui.mobilityEventDestination
  };
};

const mapDispatchToProps = dispatch => {
  return {
    changeEventTarget: event => dispatch(uiExecChangeMobilityEventTarget(event)),
    changeEventDestination: event => dispatch(uiExecChangeMobilityEventDestination(event)),
    changeEventStatus: status => dispatch(uiExecChangeEventStatus(status))
  };
};

const ConnectedMobilityEventPane = connect(
  mapStateToProps,
  mapDispatchToProps
)(MobilityEventPane);

export default ConnectedMobilityEventPane;
