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/*
 * Copyright (C) 2016 Red Hat, 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.
 */
package io.syndesis.connector.calendar;

import java.io.IOException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Map;

import javax.mail.MessagingException;

import org.apache.camel.Exchange;
import org.apache.camel.Message;
import org.apache.camel.component.google.calendar.internal.CalendarEventsApiMethod;
import org.apache.camel.component.google.calendar.internal.GoogleCalendarApiCollection;
import org.apache.camel.util.ObjectHelper;

import com.google.api.services.calendar.model.Event;

import io.syndesis.integration.component.proxy.ComponentProxyComponent;
import io.syndesis.integration.component.proxy.ComponentProxyCustomizer;

import static io.syndesis.connector.calendar.utils.GoogleCalendarUtils.getAttendeesString;

public class GoogleCalendarGetEventCustomizer implements ComponentProxyCustomizer {

    private String eventId;
    private String calendarId;

    @Override
    public void customize(ComponentProxyComponent component, Map options) {
        setApiMethod(options);
        component.setBeforeProducer(this::beforeProducer);
        component.setAfterProducer(this::afterProducer);
    }

    private void setApiMethod(Map options) {
        calendarId = (String) options.get("calendarId");
        eventId = (String) options.get("eventId");

        options.put("apiName",
                GoogleCalendarApiCollection.getCollection().getApiName(CalendarEventsApiMethod.class).getName());
        options.put("methodName", "get");
    }

    private void beforeProducer(Exchange exchange) throws MessagingException, IOException, ParseException {

        final Message in = exchange.getIn();

        in.setHeader("CamelGoogleCalendar.eventId", eventId);
        in.setHeader("CamelGoogleCalendar.calendarId", calendarId);
    }

    @SuppressWarnings("PMD.NPathComplexity")
    private void afterProducer(Exchange exchange) throws MessagingException, IOException, ParseException {

        final Message in = exchange.getIn();
        final Event event = exchange.getIn().getBody(Event.class);
        GoogleCalendarEventModel model = new GoogleCalendarEventModel();
        DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd", Locale.getDefault());
        DateFormat timeFormat = new SimpleDateFormat("HH:mm", Locale.getDefault());
        if (event != null) {

            if (ObjectHelper.isNotEmpty(event.getSummary())) {
                model.setTitle(event.getSummary());
            }
            if (ObjectHelper.isNotEmpty(event.getDescription())) {
                model.setDescription(event.getDescription());
            }
            if (ObjectHelper.isNotEmpty(event.getAttendees())) {
                model.setAttendees(getAttendeesString(event.getAttendees()));
            }
            if (ObjectHelper.isNotEmpty(event.getStart())) {
                if (event.getStart().getDateTime() != null) {
                    model.setStartDate(dateFormat.format(new Date(event.getStart().getDateTime().getValue())));
                    model.setStartTime(timeFormat.format(new Date(event.getStart().getDateTime().getValue())));
                } else {
                    model.setStartDate(dateFormat.format(new Date(event.getStart().getDate().getValue())));
                }
            }
            if (ObjectHelper.isNotEmpty(event.getEnd())) {
                if (event.getEnd().getDateTime() != null) {
                    model.setEndDate(dateFormat.format(new Date(event.getEnd().getDateTime().getValue())));
                    model.setEndTime(timeFormat.format(new Date(event.getEnd().getDateTime().getValue())));
                } else {
                    model.setEndDate(dateFormat.format(new Date(event.getEnd().getDate().getValue())));
                }
            }
            if (ObjectHelper.isNotEmpty(event.getLocation())) {
                model.setLocation(event.getLocation());
            }
            if (ObjectHelper.isNotEmpty(event.getId())) {
                model.setEventId(event.getId());
            }
        }

        in.setBody(model);
    }
}