package ca.uhn.fhir.jpa.subscription.model;

/*-
 * #%L
 * HAPI FHIR Subscription Server
 * %%
 * Copyright (C) 2014 - 2021 Smile CDR, 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.
 * #L%
 */

import org.hl7.fhir.dstu2.model.Subscription;
import org.hl7.fhir.exceptions.FHIRException;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

import static org.apache.commons.lang3.StringUtils.isBlank;

public enum CanonicalSubscriptionChannelType {
	/**
	 * The channel is executed by making a post to the URI. If a payload is included, the URL is interpreted as the service base, and an update (PUT) is made.
	 */
	RESTHOOK,
	/**
	 * The channel is executed by sending a packet across a web socket connection maintained by the client. The URL identifies the websocket, and the client binds to this URL.
	 */
	WEBSOCKET,
	/**
	 * The channel is executed by sending an email to the email addressed in the URI (which must be a mailto:).
	 */
	EMAIL,
	/**
	 * The channel is executed by sending an SMS message to the phone number identified in the URL (tel:).
	 */
	SMS,
	/**
	 * The channel is executed by sending a message (e.g. a Bundle with a MessageHeader resource etc.) to the application identified in the URI.
	 */
	MESSAGE,
	/**
	 * added to help the parsers with the generic types
	 */
	NULL;

	public String toCode() {
		switch (this) {
			case RESTHOOK:
				return "rest-hook";
			case WEBSOCKET:
				return "websocket";
			case EMAIL:
				return "email";
			case SMS:
				return "sms";
			case MESSAGE:
				return "message";
			case NULL:
			default:
				return "?";
		}
	}

	public String getSystem() {
		switch (this) {
			case RESTHOOK:
			case WEBSOCKET:
			case EMAIL:
			case SMS:
			case MESSAGE:
				return "http://terminology.hl7.org/CodeSystem/subscription-channel-type";
			case NULL:
			default:
				return "?";
		}
	}

	public String getDefinition() {
		switch (this) {
			case RESTHOOK:
				return "The channel is executed by making a post to the URI. If a payload is included, the URL is interpreted as the service base, and an update (PUT) is made.";
			case WEBSOCKET:
				return "The channel is executed by sending a packet across a web socket connection maintained by the client. The URL identifies the websocket, and the client binds to this URL.";
			case EMAIL:
				return "The channel is executed by sending an email to the email addressed in the URI (which must be a mailto:).";
			case SMS:
				return "The channel is executed by sending an SMS message to the phone number identified in the URL (tel:).";
			case MESSAGE:
				return "The channel is executed by sending a message (e.g. a Bundle with a MessageHeader resource etc.) to the application identified in the URI.";
			case NULL:
			default:
				return "?";
		}
	}

	public String getDisplay() {
		switch (this) {
			case RESTHOOK:
				return "Rest Hook";
			case WEBSOCKET:
				return "Websocket";
			case EMAIL:
				return "Email";
			case SMS:
				return "SMS";
			case MESSAGE:
				return "Message";
			case NULL:
			default:
				return "?";
		}
	}

	public Subscription.SubscriptionChannelType toCanonical() {
		return Subscription.SubscriptionChannelType.fromCode(toCode());
	}

	public static CanonicalSubscriptionChannelType fromCode(@Nullable String theSystem, @Nonnull String codeString) throws FHIRException {
		if (isBlank(codeString)) {
			return null;
		} else if ("rest-hook".equals(codeString)) {
			if (theSystem == null || theSystem.equals("http://terminology.hl7.org/CodeSystem/subscription-channel-type")) {
				return RESTHOOK;
			}
		} else if ("websocket".equals(codeString)) {
			if (theSystem == null || theSystem.equals("http://terminology.hl7.org/CodeSystem/subscription-channel-type")) {
				return WEBSOCKET;
			}
		} else if ("email".equals(codeString)) {
			if (theSystem == null || theSystem.equals("http://terminology.hl7.org/CodeSystem/subscription-channel-type")) {
				return EMAIL;
			}
		} else if ("sms".equals(codeString)) {
			if (theSystem == null || theSystem.equals("http://terminology.hl7.org/CodeSystem/subscription-channel-type")) {
				return SMS;
			}
		} else if ("message".equals(codeString)) {
			if (theSystem == null || theSystem.equals("http://terminology.hl7.org/CodeSystem/subscription-channel-type")) {
				return MESSAGE;
			}
		}

		throw new FHIRException("Unknown SubscriptionChannelType code '" + codeString + "'");
	}
}
