from __future__ import unicode_literals

import boto3
from botocore.exceptions import ClientError
import sure   # noqa

from moto import mock_cloudwatch


@mock_cloudwatch
def test_put_list_dashboard():
    client = boto3.client('cloudwatch', region_name='eu-central-1')
    widget = '{"widgets": [{"type": "text", "x": 0, "y": 7, "width": 3, "height": 3, "properties": {"markdown": "Hello world"}}]}'

    client.put_dashboard(DashboardName='test1', DashboardBody=widget)
    resp = client.list_dashboards()

    len(resp['DashboardEntries']).should.equal(1)


@mock_cloudwatch
def test_put_list_prefix_nomatch_dashboard():
    client = boto3.client('cloudwatch', region_name='eu-central-1')
    widget = '{"widgets": [{"type": "text", "x": 0, "y": 7, "width": 3, "height": 3, "properties": {"markdown": "Hello world"}}]}'

    client.put_dashboard(DashboardName='test1', DashboardBody=widget)
    resp = client.list_dashboards(DashboardNamePrefix='nomatch')

    len(resp['DashboardEntries']).should.equal(0)


@mock_cloudwatch
def test_delete_dashboard():
    client = boto3.client('cloudwatch', region_name='eu-central-1')
    widget = '{"widgets": [{"type": "text", "x": 0, "y": 7, "width": 3, "height": 3, "properties": {"markdown": "Hello world"}}]}'

    client.put_dashboard(DashboardName='test1', DashboardBody=widget)
    client.put_dashboard(DashboardName='test2', DashboardBody=widget)
    client.put_dashboard(DashboardName='test3', DashboardBody=widget)
    client.delete_dashboards(DashboardNames=['test2', 'test1'])

    resp = client.list_dashboards(DashboardNamePrefix='test3')
    len(resp['DashboardEntries']).should.equal(1)


@mock_cloudwatch
def test_delete_dashboard_fail():
    client = boto3.client('cloudwatch', region_name='eu-central-1')
    widget = '{"widgets": [{"type": "text", "x": 0, "y": 7, "width": 3, "height": 3, "properties": {"markdown": "Hello world"}}]}'

    client.put_dashboard(DashboardName='test1', DashboardBody=widget)
    client.put_dashboard(DashboardName='test2', DashboardBody=widget)
    client.put_dashboard(DashboardName='test3', DashboardBody=widget)
    # Doesnt delete anything if all dashboards to be deleted do not exist
    try:
        client.delete_dashboards(DashboardNames=['test2', 'test1', 'test_no_match'])
    except ClientError as err:
        err.response['Error']['Code'].should.equal('ResourceNotFound')
    else:
        raise RuntimeError('Should of raised error')

    resp = client.list_dashboards()
    len(resp['DashboardEntries']).should.equal(3)


@mock_cloudwatch
def test_get_dashboard():
    client = boto3.client('cloudwatch', region_name='eu-central-1')
    widget = '{"widgets": [{"type": "text", "x": 0, "y": 7, "width": 3, "height": 3, "properties": {"markdown": "Hello world"}}]}'
    client.put_dashboard(DashboardName='test1', DashboardBody=widget)

    resp = client.get_dashboard(DashboardName='test1')
    resp.should.contain('DashboardArn')
    resp.should.contain('DashboardBody')
    resp['DashboardName'].should.equal('test1')


@mock_cloudwatch
def test_get_dashboard_fail():
    client = boto3.client('cloudwatch', region_name='eu-central-1')

    try:
        client.get_dashboard(DashboardName='test1')
    except ClientError as err:
        err.response['Error']['Code'].should.equal('ResourceNotFound')
    else:
        raise RuntimeError('Should of raised error')


@mock_cloudwatch
def test_alarm_state():
    client = boto3.client('cloudwatch', region_name='eu-central-1')

    client.put_metric_alarm(
        AlarmName='testalarm1',
        MetricName='cpu',
        Namespace='blah',
        Period=10,
        EvaluationPeriods=5,
        Statistic='Average',
        Threshold=2,
        ComparisonOperator='GreaterThanThreshold',
    )
    client.put_metric_alarm(
        AlarmName='testalarm2',
        MetricName='cpu',
        Namespace='blah',
        Period=10,
        EvaluationPeriods=5,
        Statistic='Average',
        Threshold=2,
        ComparisonOperator='GreaterThanThreshold',
    )

    # This is tested implicitly as if it doesnt work the rest will die
    client.set_alarm_state(
        AlarmName='testalarm1',
        StateValue='ALARM',
        StateReason='testreason',
        StateReasonData='{"some": "json_data"}'
    )

    resp = client.describe_alarms(
        StateValue='ALARM'
    )
    len(resp['MetricAlarms']).should.equal(1)
    resp['MetricAlarms'][0]['AlarmName'].should.equal('testalarm1')

    resp = client.describe_alarms(
        StateValue='OK'
    )
    len(resp['MetricAlarms']).should.equal(1)
    resp['MetricAlarms'][0]['AlarmName'].should.equal('testalarm2')

    # Just for sanity
    resp = client.describe_alarms()
    len(resp['MetricAlarms']).should.equal(2)