/*
 * Copyright 2018 Brigham Young University
 *
 * 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 { expect } from 'chai';
import {
    AccountConfig,
    DeployContext,
    PreDeployContext,
    ProduceEventsContext,
    ServiceContext,
    ServiceDeployer,
    ServiceEventType,
    ServiceType,
    UnDeployContext
} from 'handel-extension-api';
import { deletePhases, deployPhase } from 'handel-extension-support';
import 'mocha';
import * as sinon from 'sinon';
import config from '../../../src/account-config/account-config';
import * as cloudWatchEventsCalls from '../../../src/aws/cloudwatch-events-calls';
import { Service } from '../../../src/services/cloudwatchevent';
import { CloudWatchEventsConfig, CloudWatchEventsServiceEventConsumer } from '../../../src/services/cloudwatchevent/config-types';
import { STDLIB_PREFIX } from '../../../src/services/stdlib';

describe('cloudwatchevent deployer', () => {
    let sandbox: sinon.SinonSandbox;
    let serviceContext: ServiceContext<CloudWatchEventsConfig>;
    let serviceParams: CloudWatchEventsConfig;
    let accountConfig: AccountConfig;
    const appName = 'FakeApp';
    const envName = 'FakeEnv';
    let cloudWatchEvent: ServiceDeployer;

    beforeEach(async () => {
        cloudWatchEvent = new Service();
        accountConfig = await config(`${__dirname}/../../test-account-config.yml`);
        sandbox = sinon.createSandbox();
        serviceParams = {
            type: 'cloudwatchevents'
        };
        serviceContext = new ServiceContext(appName, envName, 'FakeService', new ServiceType(STDLIB_PREFIX, 'cloudwatchevent'), serviceParams, accountConfig);
    });

    afterEach(() => {
        sandbox.restore();
    });

    describe('check', () => {
        it('should require the schedule or event_pattern parameter to be present', () => {
            const errors = cloudWatchEvent.check!(serviceContext, []);
            expect(errors.length).to.equal(1);
            expect(errors[0]).to.contain('You must specify at least one of the \'schedule\' or \'event_pattern\' parameters');
        });

        it('should work when there are no configuration errors', () => {
            serviceContext.params = {
                type: 'cloudwatchevents',
                schedule: 'rate(1 minute)'
            };
            const errors = cloudWatchEvent.check!(serviceContext, []);
            expect(errors.length).to.equal(0);
        });
    });

    describe('deploy', () => {
        it('should deploy the event rule', async () => {
            serviceContext.params = {
                type: 'cloudwatchevents',
                schedule: 'rate(1 minute)'
            };
            const preDeployContext = new PreDeployContext(serviceContext);
            const eventRuleArn = 'FakeEventRuleArn';

            const deployStackStub = sandbox.stub(deployPhase, 'deployCloudFormationStack').returns(Promise.resolve({
                Outputs: [{
                    OutputKey: 'EventRuleArn',
                    OutputValue: eventRuleArn
                }]
            }));

            const deployContext = await cloudWatchEvent.deploy!(serviceContext, preDeployContext, []);
            expect(deployStackStub.callCount).to.equal(1);
            expect(deployContext).to.be.instanceof(DeployContext);
            expect(deployContext.eventOutputs!.resourcePrincipal).to.equal('events.amazonaws.com');
            expect(deployContext.eventOutputs!.resourceArn).to.equal(eventRuleArn);
        });
    });

    describe('produceEvents', () => {
        const eventConfigConsumer: CloudWatchEventsServiceEventConsumer = {
            service_name: 'FakeConsumerService',
            event_input: ''
        };

        it('should add a target for the lambda service type', async () => {
            const consumerServiceName = 'ConsumerService';
            const consumerServiceContext = new ServiceContext(appName, envName, consumerServiceName, new ServiceType(STDLIB_PREFIX, 'lambda'), {type: 'lambda'}, accountConfig);
            const consumerDeployContext = new DeployContext(consumerServiceContext);
            consumerDeployContext.eventOutputs = {
                resourceArn: 'FakeLambdaArn',
                resourcePrincipal: 'FakePrincipal',
                serviceEventType: ServiceEventType.Lambda
            };

            serviceContext.params = {
                type: 'cloudwatchevents',
                event_consumers: [
                    {
                        service_name: consumerServiceName,
                        event_input: '{"notify": false}'
                    }
                ]
            };
            const producerDeployContext = new DeployContext(serviceContext);
            producerDeployContext.eventOutputs = {
                resourceArn: 'FakeArn',
                resourcePrincipal: 'FakePrincipal',
                serviceEventType: ServiceEventType.CloudWatchEvents
            };

            const addTargetStub = sandbox.stub(cloudWatchEventsCalls, 'addTarget').returns(Promise.resolve('FakeTargetId'));

            const produceEventsContext = await cloudWatchEvent.produceEvents!(serviceContext, producerDeployContext, eventConfigConsumer, consumerServiceContext, consumerDeployContext);
            expect(produceEventsContext).to.be.instanceof(ProduceEventsContext);
            expect(addTargetStub.callCount).to.equal(1);
        });

        it('should add a target for the sns service type', async () => {
            const consumerServiceName = 'ConsumerService';
            const consumerServiceContext = new ServiceContext(appName, envName, consumerServiceName, new ServiceType(STDLIB_PREFIX, 'sns'), {type: 'sns'}, accountConfig);
            const consumerDeployContext = new DeployContext(consumerServiceContext);
            consumerDeployContext.eventOutputs = {
                resourceArn: 'FakeTopicArn',
                resourcePrincipal: 'FakePrincipal',
                serviceEventType: ServiceEventType.SNS
            };

            serviceContext.params = {
                type: 'cloudwatchevents',
                event_consumers: [
                    {
                        service_name: consumerServiceName,
                        event_input: '{"notify": false}'
                    }
                ]
            };
            const producerDeployContext = new DeployContext(serviceContext);
            producerDeployContext.eventOutputs = {
                resourceArn: 'FakeArn',
                resourcePrincipal: 'FakePrincipal',
                serviceEventType: ServiceEventType.CloudWatchEvents
            };

            const addTargetStub = sandbox.stub(cloudWatchEventsCalls, 'addTarget').returns(Promise.resolve('FakeTargetId'));

            const produceEventsContext = await cloudWatchEvent.produceEvents!(serviceContext, producerDeployContext, eventConfigConsumer, consumerServiceContext, consumerDeployContext);
            expect(produceEventsContext).to.be.instanceof(ProduceEventsContext);
            expect(addTargetStub.callCount).to.equal(1);
        });
    });

    describe('unDeploy', () => {
        it('should remove all targets and delete the stack', async () => {
            const getRuleStub = sandbox.stub(cloudWatchEventsCalls, 'getRule').returns(Promise.resolve({}));
            const removeTargetsStub = sandbox.stub(cloudWatchEventsCalls, 'removeAllTargets').returns(Promise.resolve(true));
            const unDeployStackStub = sandbox.stub(deletePhases, 'unDeployService').returns(Promise.resolve(true));

            const unDeployContext = await cloudWatchEvent.unDeploy!(serviceContext);
            expect(unDeployContext).to.be.instanceof(UnDeployContext);
            expect(getRuleStub.callCount).to.equal(1);
            expect(removeTargetsStub.callCount).to.equal(1);
            expect(unDeployStackStub.callCount).to.equal(1);
        });
    });
});