/*
 * Copyright 2015 Collective, 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 com.collective.celos;

import java.util.HashMap;
import java.util.Map;

/**
 * Fake implementation of external service for testing.
 * 
 * Always returns the external status passed to its constructor.
 * 
 * Remembers scheduled times that have been submitted for running and their associated fake external IDs.
 */
public class MockExternalService implements ExternalService {

    private final ExternalStatus status;
    private final Map<SlotID, String> slots2ExternalID = new HashMap<SlotID, String>();

    public MockExternalService(ExternalStatus status) {
        this.status = Util.requireNonNull(status);
    }
    
    @Override
    public String submit(SlotID id) {
        String externalID = "mock-" + Math.random();
        slots2ExternalID.put(id, externalID);
        return externalID;
    }
    
    @Override
    public void start(SlotID id, String externalID) throws ExternalServiceException {
    }

    @Override
    public ExternalStatus getStatus(SlotID id, String externalID) {
        return status;
    }

    @Override
    public void kill(SlotID id, String externalID) throws ExternalServiceException {

    }

    public Map<SlotID, String> getSlots2ExternalID() {
        return slots2ExternalID;
    }

    public static class MockExternalStatusRunning implements ExternalStatus {

        @Override
        public boolean isRunning() {
            return true;
        }

        @Override
        public boolean isSuccess() {
            throw new IllegalStateException("Still running.");
        }
        
    }
    
    public static class MockExternalStatusSuccess implements ExternalStatus {

        @Override
        public boolean isRunning() {
            return false;
        }

        @Override
        public boolean isSuccess() {
            return true;
        }
        
    }

    public static class MockExternalStatusFailure implements ExternalStatus {

        @Override
        public boolean isRunning() {
            return false;
        }

        @Override
        public boolean isSuccess() {
            return false;
        }
        
    }

}