- name: run ec2_metric_alarm tests
  module_defaults:
    group/aws:
      aws_access_key: "{{ aws_access_key }}"
      aws_secret_key: "{{ aws_secret_key }}"
      security_token: "{{ security_token | default(omit) }}"
      region: "{{ aws_region }}"
  block:
    - set_fact:
        alarm_full_name: "{{ alarm_prefix }}-{{ resource_prefix }}-cpu-low"

      # until there's a module to get info about alarms, awscli is needed
    - name: install awscli
      pip:
        state: present
        name: awscli

    - name: set up environment for testing.
      include_tasks: env_setup.yml

    - name: get info on alarms
      command: aws cloudwatch describe-alarms --alarm-names {{ alarm_full_name }}
      environment:
        AWS_ACCESS_KEY_ID: "{{ aws_access_key }}"
        AWS_SECRET_ACCESS_KEY: "{{ aws_secret_key }}"
        AWS_SESSION_TOKEN: "{{ security_token | default('') }}"
        AWS_DEFAULT_REGION: "{{ aws_region }}"
      register: alarm_info_query

    - name: Find AMI to use
      ec2_ami_info:
        owners: 'amazon'
        filters:
          name: '{{ ec2_ami_name }}'
      register: ec2_amis
    - set_fact:
        ec2_ami_image: '{{ ec2_amis.images[0].image_id }}'

    - name: Make instance in a default subnet of the VPC
      ec2_instance:
        name: "{{ resource_prefix }}-test-default-vpc"
        image_id: "{{ec2_ami_image }}"
        tags:
          TestId: "{{ resource_prefix }}"
        security_groups: "{{ sg.group_id }}"
        instance_type: t2.micro
        wait: true
      register: ec2_instance_results

    - name: create ec2 metric alarm on ec2 instance
      ec2_metric_alarm:
        dimensions:
          InstanceId: "{{ ec2_instance_results.instances[0].instance_id }}"
        state: present
        name: "{{ alarm_full_name }}"
        metric: "CPUUtilization"
        namespace: "AWS/EC2"
        treat_missing_data: missing
        statistic: Average
        comparison: "<="
        threshold: 5.0
        period: 300
        evaluation_periods: 3
        unit: "Percent"
        description: "This will alarm when an instance's cpu usage average is lower than 5% for 15 minutes "
      register: ec2_instance_metric_alarm

    - name: get info on alarms
      command: aws cloudwatch describe-alarms --alarm-names {{ alarm_full_name }}
      environment:
        AWS_ACCESS_KEY_ID: "{{ aws_access_key }}"
        AWS_SECRET_ACCESS_KEY: "{{ aws_secret_key }}"
        AWS_SESSION_TOKEN: "{{ security_token | default('') }}"
        AWS_DEFAULT_REGION: "{{ aws_region }}"
      register: alarm_info_query

    - name: convert it to an object
      set_fact:
        alarm_info: "{{ alarm_info_query.stdout |from_json }}"

    - name: "verify that an alarm was created"
      assert:
        that:
          - 'ec2_instance_metric_alarm.changed'
          - 'ec2_instance_metric_alarm.alarm_arn'
          - 'ec2_instance_metric_alarm.statistic == alarm_info["MetricAlarms"][0].Statistic'
          - 'ec2_instance_metric_alarm.name  == alarm_info["MetricAlarms"][0].AlarmName'
          - 'ec2_instance_metric_alarm.metric== alarm_info["MetricAlarms"][0].MetricName'
          - 'ec2_instance_metric_alarm.namespace == alarm_info["MetricAlarms"][0].Namespace'
          - 'ec2_instance_metric_alarm.comparison == alarm_info["MetricAlarms"][0].ComparisonOperator'
          - 'ec2_instance_metric_alarm.comparison == alarm_info["MetricAlarms"][0].ComparisonOperator'
          - 'ec2_instance_metric_alarm.threshold == alarm_info["MetricAlarms"][0].Threshold'
          - 'ec2_instance_metric_alarm.period == alarm_info["MetricAlarms"][0].Period'
          - 'ec2_instance_metric_alarm.unit == alarm_info["MetricAlarms"][0].Unit'
          - 'ec2_instance_metric_alarm.evaluation_periods == alarm_info["MetricAlarms"][0].EvaluationPeriods'
          - 'ec2_instance_metric_alarm.description == alarm_info["MetricAlarms"][0].AlarmDescription'
          - 'ec2_instance_metric_alarm.treat_missing_data == alarm_info["MetricAlarms"][0].TreatMissingData'

    - name: create ec2 metric alarm on ec2 instance (idempotent)
      ec2_metric_alarm:
        dimensions:
          InstanceId: "{{ ec2_instance_results.instances[0].instance_id }}"
        state: present
        name: "{{ alarm_full_name }}"
        metric: "CPUUtilization"
        namespace: "AWS/EC2"
        treat_missing_data: missing
        statistic: Average
        comparison: "<="
        threshold: 5.0
        period: 300
        evaluation_periods: 3
        unit: "Percent"
        description: "This will alarm when an instance's cpu usage average is lower than 5% for 15 minutes "
      register: ec2_instance_metric_alarm_idempotent

    - name: get info on alarms
      command: aws cloudwatch describe-alarms --alarm-names {{ alarm_full_name }}
      environment:
        AWS_ACCESS_KEY_ID: "{{ aws_access_key }}"
        AWS_SECRET_ACCESS_KEY: "{{ aws_secret_key }}"
        AWS_SESSION_TOKEN: "{{ security_token | default('') }}"
        AWS_DEFAULT_REGION: "{{ aws_region }}"
      register: alarm_info_query_idempotent

    - name: convert it to an object
      set_fact:
        alarm_info_idempotent: "{{ alarm_info_query_idempotent.stdout |from_json }}"

    - name: "Verify alarm does not register as changed after update"
      assert:
        that:
          - not ec2_instance_metric_alarm_idempotent.changed

    - name: "Verify alarm did not change after updating"
      assert:
        that:
          - "alarm_info['MetricAlarms'][0]['{{item}}'] == alarm_info_idempotent['MetricAlarms'][0]['{{ item }}']"
      with_items:
          - AlarmArn
          - Statistic
          - AlarmName
          - MetricName
          - Namespace
          - ComparisonOperator
          - Threshold
          - Period
          - Unit
          - EvaluationPeriods
          - AlarmDescription
          - TreatMissingData

    - name: update alarm
      ec2_metric_alarm:
        dimensions:
          InstanceId: "{{ ec2_instance_results.instances[0].instance_id }}"
        state: present
        name: "{{ alarm_full_name }}"
        metric: "CPUUtilization"
        namespace: "AWS/EC2"
        statistic: Average
        comparison: "<="
        threshold: 5.0
        period: 60
        evaluation_periods: 3
        unit: "Percent"
        description: "This will alarm when an instance's cpu usage average is lower than 5% for 3 minutes "
      register: ec2_instance_metric_alarm_update

    - name: "verify that alarm registers as updated"
      assert:
        that:
          - 'ec2_instance_metric_alarm.changed'

    - name: "verify that properties were changed"
      assert:
        that:
          - 'ec2_instance_metric_alarm_update.changed'
          - 'ec2_instance_metric_alarm_update.period == 60' #Period should be 60, not matching old value
          - 'ec2_instance_metric_alarm_update.alarm_arn == ec2_instance_metric_alarm.alarm_arn'
          - 'ec2_instance_metric_alarm_update.statistic == alarm_info["MetricAlarms"][0].Statistic'
          - 'ec2_instance_metric_alarm_update.name  == alarm_info["MetricAlarms"][0].AlarmName'
          - 'ec2_instance_metric_alarm_update.metric== alarm_info["MetricAlarms"][0].MetricName'
          - 'ec2_instance_metric_alarm_update.namespace == alarm_info["MetricAlarms"][0].Namespace'
          - 'ec2_instance_metric_alarm_update.statistic == alarm_info["MetricAlarms"][0].Statistic'
          - 'ec2_instance_metric_alarm_update.comparison == alarm_info["MetricAlarms"][0].ComparisonOperator'
          - 'ec2_instance_metric_alarm_update.threshold == alarm_info["MetricAlarms"][0].Threshold'
          - 'ec2_instance_metric_alarm_update.unit == alarm_info["MetricAlarms"][0].Unit'
          - 'ec2_instance_metric_alarm_update.evaluation_periods == alarm_info["MetricAlarms"][0].EvaluationPeriods'
          - 'ec2_instance_metric_alarm_update.treat_missing_data == alarm_info["MetricAlarms"][0].TreatMissingData'

    - name: try to remove the alarm
      ec2_metric_alarm:
        state: absent
        name: "{{ alarm_full_name }}"

      register: ec2_instance_metric_alarm_deletion

    - name: Verify that the alarm reports deleted/changed
      assert:
        that:
          - 'ec2_instance_metric_alarm_deletion.changed'

    - name: get info on alarms
      command: aws cloudwatch describe-alarms --alarm-names {{ alarm_full_name }}
      environment:
        AWS_ACCESS_KEY_ID: "{{ aws_access_key }}"
        AWS_SECRET_ACCESS_KEY: "{{ aws_secret_key }}"
        AWS_SESSION_TOKEN: "{{ security_token | default('') }}"
        AWS_DEFAULT_REGION: "{{ aws_region }}"
      register: alarm_info_query

    - name: convert it to an object
      set_fact:
        alarm_info: "{{ alarm_info_query.stdout |from_json }}"

    - name: Verify that the alarm was deleted using cli
      assert:
        that:
          - 'alarm_info["MetricAlarms"]|length == 0'
  always:
    - name: try to stop the ec2 instance
      ec2_instance:
        instance_ids: "{{ ec2_instance_results.instances[0].instance_id }}"
        state: terminated
      ignore_errors: yes

    - include_tasks: env_cleanup.yml