from __future__ import unicode_literals

# Ensure 'assert_raises' context manager support for Python 2.6
import tests.backport_assert_raises  # noqa
from nose.tools import assert_raises

import boto3
import boto
import boto.vpc
from boto.exception import EC2ResponseError
from botocore.exceptions import ParamValidationError, ClientError
import json
import sure  # noqa

from moto import mock_cloudformation_deprecated, mock_ec2, mock_ec2_deprecated


@mock_ec2_deprecated
def test_subnets():
    ec2 = boto.connect_ec2("the_key", "the_secret")
    conn = boto.connect_vpc("the_key", "the_secret")
    vpc = conn.create_vpc("10.0.0.0/16")
    subnet = conn.create_subnet(vpc.id, "10.0.0.0/18")

    all_subnets = conn.get_all_subnets()
    all_subnets.should.have.length_of(1 + len(ec2.get_all_zones()))

    conn.delete_subnet(subnet.id)

    all_subnets = conn.get_all_subnets()
    all_subnets.should.have.length_of(0 + len(ec2.get_all_zones()))

    with assert_raises(EC2ResponseError) as cm:
        conn.delete_subnet(subnet.id)
    cm.exception.code.should.equal("InvalidSubnetID.NotFound")
    cm.exception.status.should.equal(400)
    cm.exception.request_id.should_not.be.none


@mock_ec2_deprecated
def test_subnet_create_vpc_validation():
    conn = boto.connect_vpc("the_key", "the_secret")

    with assert_raises(EC2ResponseError) as cm:
        conn.create_subnet("vpc-abcd1234", "10.0.0.0/18")
    cm.exception.code.should.equal("InvalidVpcID.NotFound")
    cm.exception.status.should.equal(400)
    cm.exception.request_id.should_not.be.none


@mock_ec2_deprecated
def test_subnet_tagging():
    conn = boto.connect_vpc("the_key", "the_secret")
    vpc = conn.create_vpc("10.0.0.0/16")
    subnet = conn.create_subnet(vpc.id, "10.0.0.0/18")

    subnet.add_tag("a key", "some value")

    tag = conn.get_all_tags()[0]
    tag.name.should.equal("a key")
    tag.value.should.equal("some value")

    # Refresh the subnet
    subnet = conn.get_all_subnets(subnet_ids=[subnet.id])[0]
    subnet.tags.should.have.length_of(1)
    subnet.tags["a key"].should.equal("some value")


@mock_ec2_deprecated
def test_subnet_should_have_proper_availability_zone_set():
    conn = boto.vpc.connect_to_region("us-west-1")
    vpcA = conn.create_vpc("10.0.0.0/16")
    subnetA = conn.create_subnet(vpcA.id, "10.0.0.0/24", availability_zone="us-west-1b")
    subnetA.availability_zone.should.equal("us-west-1b")


@mock_ec2
def test_default_subnet():
    ec2 = boto3.resource("ec2", region_name="us-west-1")

    default_vpc = list(ec2.vpcs.all())[0]
    default_vpc.cidr_block.should.equal("172.31.0.0/16")
    default_vpc.reload()
    default_vpc.is_default.should.be.ok

    subnet = ec2.create_subnet(
        VpcId=default_vpc.id, CidrBlock="172.31.48.0/20", AvailabilityZone="us-west-1a"
    )
    subnet.reload()
    subnet.map_public_ip_on_launch.shouldnt.be.ok


@mock_ec2_deprecated
def test_non_default_subnet():
    vpc_cli = boto.vpc.connect_to_region("us-west-1")

    # Create the non default VPC
    vpc = vpc_cli.create_vpc("10.0.0.0/16")
    vpc.is_default.shouldnt.be.ok

    subnet = vpc_cli.create_subnet(vpc.id, "10.0.0.0/24")
    subnet = vpc_cli.get_all_subnets(subnet_ids=[subnet.id])[0]
    subnet.mapPublicIpOnLaunch.should.equal("false")


@mock_ec2
def test_boto3_non_default_subnet():
    ec2 = boto3.resource("ec2", region_name="us-west-1")

    # Create the non default VPC
    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    vpc.reload()
    vpc.is_default.shouldnt.be.ok

    subnet = ec2.create_subnet(
        VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
    )
    subnet.reload()
    subnet.map_public_ip_on_launch.shouldnt.be.ok


@mock_ec2
def test_modify_subnet_attribute_public_ip_on_launch():
    ec2 = boto3.resource("ec2", region_name="us-west-1")
    client = boto3.client("ec2", region_name="us-west-1")

    # Get the default VPC
    vpc = list(ec2.vpcs.all())[0]

    subnet = ec2.create_subnet(
        VpcId=vpc.id, CidrBlock="172.31.48.0/20", AvailabilityZone="us-west-1a"
    )

    # 'map_public_ip_on_launch' is set when calling 'DescribeSubnets' action
    subnet.reload()

    # For non default subnet, attribute value should be 'False'
    subnet.map_public_ip_on_launch.shouldnt.be.ok

    client.modify_subnet_attribute(
        SubnetId=subnet.id, MapPublicIpOnLaunch={"Value": False}
    )
    subnet.reload()
    subnet.map_public_ip_on_launch.shouldnt.be.ok

    client.modify_subnet_attribute(
        SubnetId=subnet.id, MapPublicIpOnLaunch={"Value": True}
    )
    subnet.reload()
    subnet.map_public_ip_on_launch.should.be.ok


@mock_ec2
def test_modify_subnet_attribute_assign_ipv6_address_on_creation():
    ec2 = boto3.resource("ec2", region_name="us-west-1")
    client = boto3.client("ec2", region_name="us-west-1")

    # Get the default VPC
    vpc = list(ec2.vpcs.all())[0]

    subnet = ec2.create_subnet(
        VpcId=vpc.id, CidrBlock="172.31.112.0/20", AvailabilityZone="us-west-1a"
    )

    # 'map_public_ip_on_launch' is set when calling 'DescribeSubnets' action
    subnet.reload()

    # For non default subnet, attribute value should be 'False'
    subnet.assign_ipv6_address_on_creation.shouldnt.be.ok

    client.modify_subnet_attribute(
        SubnetId=subnet.id, AssignIpv6AddressOnCreation={"Value": False}
    )
    subnet.reload()
    subnet.assign_ipv6_address_on_creation.shouldnt.be.ok

    client.modify_subnet_attribute(
        SubnetId=subnet.id, AssignIpv6AddressOnCreation={"Value": True}
    )
    subnet.reload()
    subnet.assign_ipv6_address_on_creation.should.be.ok


@mock_ec2
def test_modify_subnet_attribute_validation():
    ec2 = boto3.resource("ec2", region_name="us-west-1")
    client = boto3.client("ec2", region_name="us-west-1")
    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    subnet = ec2.create_subnet(
        VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
    )

    with assert_raises(ParamValidationError):
        client.modify_subnet_attribute(
            SubnetId=subnet.id, MapPublicIpOnLaunch={"Value": "invalid"}
        )


@mock_ec2_deprecated
def test_subnet_get_by_id():
    ec2 = boto.ec2.connect_to_region("us-west-1")
    conn = boto.vpc.connect_to_region("us-west-1")
    vpcA = conn.create_vpc("10.0.0.0/16")
    subnetA = conn.create_subnet(vpcA.id, "10.0.0.0/24", availability_zone="us-west-1a")
    vpcB = conn.create_vpc("10.0.0.0/16")
    subnetB1 = conn.create_subnet(
        vpcB.id, "10.0.0.0/24", availability_zone="us-west-1a"
    )
    subnetB2 = conn.create_subnet(
        vpcB.id, "10.0.1.0/24", availability_zone="us-west-1b"
    )

    subnets_by_id = conn.get_all_subnets(subnet_ids=[subnetA.id, subnetB1.id])
    subnets_by_id.should.have.length_of(2)
    subnets_by_id = tuple(map(lambda s: s.id, subnets_by_id))
    subnetA.id.should.be.within(subnets_by_id)
    subnetB1.id.should.be.within(subnets_by_id)

    with assert_raises(EC2ResponseError) as cm:
        conn.get_all_subnets(subnet_ids=["subnet-does_not_exist"])
    cm.exception.code.should.equal("InvalidSubnetID.NotFound")
    cm.exception.status.should.equal(400)
    cm.exception.request_id.should_not.be.none


@mock_ec2_deprecated
def test_get_subnets_filtering():
    ec2 = boto.ec2.connect_to_region("us-west-1")
    conn = boto.vpc.connect_to_region("us-west-1")
    vpcA = conn.create_vpc("10.0.0.0/16")
    subnetA = conn.create_subnet(vpcA.id, "10.0.0.0/24", availability_zone="us-west-1a")
    vpcB = conn.create_vpc("10.0.0.0/16")
    subnetB1 = conn.create_subnet(
        vpcB.id, "10.0.0.0/24", availability_zone="us-west-1a"
    )
    subnetB2 = conn.create_subnet(
        vpcB.id, "10.0.1.0/24", availability_zone="us-west-1b"
    )

    all_subnets = conn.get_all_subnets()
    all_subnets.should.have.length_of(3 + len(ec2.get_all_zones()))

    # Filter by VPC ID
    subnets_by_vpc = conn.get_all_subnets(filters={"vpc-id": vpcB.id})
    subnets_by_vpc.should.have.length_of(2)
    set([subnet.id for subnet in subnets_by_vpc]).should.equal(
        set([subnetB1.id, subnetB2.id])
    )

    # Filter by CIDR variations
    subnets_by_cidr1 = conn.get_all_subnets(filters={"cidr": "10.0.0.0/24"})
    subnets_by_cidr1.should.have.length_of(2)
    set([subnet.id for subnet in subnets_by_cidr1]).should.equal(
        set([subnetA.id, subnetB1.id])
    )

    subnets_by_cidr2 = conn.get_all_subnets(filters={"cidr-block": "10.0.0.0/24"})
    subnets_by_cidr2.should.have.length_of(2)
    set([subnet.id for subnet in subnets_by_cidr2]).should.equal(
        set([subnetA.id, subnetB1.id])
    )

    subnets_by_cidr3 = conn.get_all_subnets(filters={"cidrBlock": "10.0.0.0/24"})
    subnets_by_cidr3.should.have.length_of(2)
    set([subnet.id for subnet in subnets_by_cidr3]).should.equal(
        set([subnetA.id, subnetB1.id])
    )

    # Filter by VPC ID and CIDR
    subnets_by_vpc_and_cidr = conn.get_all_subnets(
        filters={"vpc-id": vpcB.id, "cidr": "10.0.0.0/24"}
    )
    subnets_by_vpc_and_cidr.should.have.length_of(1)
    set([subnet.id for subnet in subnets_by_vpc_and_cidr]).should.equal(
        set([subnetB1.id])
    )

    # Filter by subnet ID
    subnets_by_id = conn.get_all_subnets(filters={"subnet-id": subnetA.id})
    subnets_by_id.should.have.length_of(1)
    set([subnet.id for subnet in subnets_by_id]).should.equal(set([subnetA.id]))

    # Filter by availabilityZone
    subnets_by_az = conn.get_all_subnets(
        filters={"availabilityZone": "us-west-1a", "vpc-id": vpcB.id}
    )
    subnets_by_az.should.have.length_of(1)
    set([subnet.id for subnet in subnets_by_az]).should.equal(set([subnetB1.id]))

    # Filter by defaultForAz

    subnets_by_az = conn.get_all_subnets(filters={"defaultForAz": "true"})
    subnets_by_az.should.have.length_of(len(conn.get_all_zones()))

    # Unsupported filter
    conn.get_all_subnets.when.called_with(
        filters={"not-implemented-filter": "foobar"}
    ).should.throw(NotImplementedError)


@mock_ec2_deprecated
@mock_cloudformation_deprecated
def test_subnet_tags_through_cloudformation():
    vpc_conn = boto.vpc.connect_to_region("us-west-1")
    vpc = vpc_conn.create_vpc("10.0.0.0/16")

    subnet_template = {
        "AWSTemplateFormatVersion": "2010-09-09",
        "Resources": {
            "testSubnet": {
                "Type": "AWS::EC2::Subnet",
                "Properties": {
                    "VpcId": vpc.id,
                    "CidrBlock": "10.0.0.0/24",
                    "AvailabilityZone": "us-west-1b",
                    "Tags": [
                        {"Key": "foo", "Value": "bar"},
                        {"Key": "blah", "Value": "baz"},
                    ],
                },
            }
        },
    }
    cf_conn = boto.cloudformation.connect_to_region("us-west-1")
    template_json = json.dumps(subnet_template)
    cf_conn.create_stack("test_stack", template_body=template_json)

    subnet = vpc_conn.get_all_subnets(filters={"cidrBlock": "10.0.0.0/24"})[0]
    subnet.tags["foo"].should.equal("bar")
    subnet.tags["blah"].should.equal("baz")


@mock_ec2
def test_create_subnet_response_fields():
    ec2 = boto3.resource("ec2", region_name="us-west-1")
    client = boto3.client("ec2", region_name="us-west-1")

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    subnet = client.create_subnet(
        VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
    )["Subnet"]

    subnet.should.have.key("AvailabilityZone")
    subnet.should.have.key("AvailabilityZoneId")
    subnet.should.have.key("AvailableIpAddressCount")
    subnet.should.have.key("CidrBlock")
    subnet.should.have.key("State")
    subnet.should.have.key("SubnetId")
    subnet.should.have.key("VpcId")
    subnet.shouldnt.have.key("Tags")
    subnet.should.have.key("DefaultForAz").which.should.equal(False)
    subnet.should.have.key("MapPublicIpOnLaunch").which.should.equal(False)
    subnet.should.have.key("OwnerId")
    subnet.should.have.key("AssignIpv6AddressOnCreation").which.should.equal(False)

    subnet_arn = "arn:aws:ec2:{region}:{owner_id}:subnet/{subnet_id}".format(
        region=subnet["AvailabilityZone"][0:-1],
        owner_id=subnet["OwnerId"],
        subnet_id=subnet["SubnetId"],
    )
    subnet.should.have.key("SubnetArn").which.should.equal(subnet_arn)
    subnet.should.have.key("Ipv6CidrBlockAssociationSet").which.should.equal([])


@mock_ec2
def test_describe_subnet_response_fields():
    ec2 = boto3.resource("ec2", region_name="us-west-1")
    client = boto3.client("ec2", region_name="us-west-1")

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    subnet_object = ec2.create_subnet(
        VpcId=vpc.id, CidrBlock="10.0.0.0/24", AvailabilityZone="us-west-1a"
    )

    subnets = client.describe_subnets(SubnetIds=[subnet_object.id])["Subnets"]
    subnets.should.have.length_of(1)
    subnet = subnets[0]

    subnet.should.have.key("AvailabilityZone")
    subnet.should.have.key("AvailabilityZoneId")
    subnet.should.have.key("AvailableIpAddressCount")
    subnet.should.have.key("CidrBlock")
    subnet.should.have.key("State")
    subnet.should.have.key("SubnetId")
    subnet.should.have.key("VpcId")
    subnet.shouldnt.have.key("Tags")
    subnet.should.have.key("DefaultForAz").which.should.equal(False)
    subnet.should.have.key("MapPublicIpOnLaunch").which.should.equal(False)
    subnet.should.have.key("OwnerId")
    subnet.should.have.key("AssignIpv6AddressOnCreation").which.should.equal(False)

    subnet_arn = "arn:aws:ec2:{region}:{owner_id}:subnet/{subnet_id}".format(
        region=subnet["AvailabilityZone"][0:-1],
        owner_id=subnet["OwnerId"],
        subnet_id=subnet["SubnetId"],
    )
    subnet.should.have.key("SubnetArn").which.should.equal(subnet_arn)
    subnet.should.have.key("Ipv6CidrBlockAssociationSet").which.should.equal([])


@mock_ec2
def test_create_subnet_with_invalid_availability_zone():
    ec2 = boto3.resource("ec2", region_name="us-west-1")
    client = boto3.client("ec2", region_name="us-west-1")

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")

    subnet_availability_zone = "asfasfas"
    with assert_raises(ClientError) as ex:
        subnet = client.create_subnet(
            VpcId=vpc.id,
            CidrBlock="10.0.0.0/24",
            AvailabilityZone=subnet_availability_zone,
        )
    assert str(ex.exception).startswith(
        "An error occurred (InvalidParameterValue) when calling the CreateSubnet "
        "operation: Value ({}) for parameter availabilityZone is invalid. Subnets can currently only be created in the following availability zones: ".format(
            subnet_availability_zone
        )
    )


@mock_ec2
def test_create_subnet_with_invalid_cidr_range():
    ec2 = boto3.resource("ec2", region_name="us-west-1")

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    vpc.reload()
    vpc.is_default.shouldnt.be.ok

    subnet_cidr_block = "10.1.0.0/20"
    with assert_raises(ClientError) as ex:
        subnet = ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
    str(ex.exception).should.equal(
        "An error occurred (InvalidSubnet.Range) when calling the CreateSubnet "
        "operation: The CIDR '{}' is invalid.".format(subnet_cidr_block)
    )


@mock_ec2
def test_create_subnet_with_invalid_cidr_block_parameter():
    ec2 = boto3.resource("ec2", region_name="us-west-1")

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    vpc.reload()
    vpc.is_default.shouldnt.be.ok

    subnet_cidr_block = "1000.1.0.0/20"
    with assert_raises(ClientError) as ex:
        subnet = ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
    str(ex.exception).should.equal(
        "An error occurred (InvalidParameterValue) when calling the CreateSubnet "
        "operation: Value ({}) for parameter cidrBlock is invalid. This is not a valid CIDR block.".format(
            subnet_cidr_block
        )
    )


@mock_ec2
def test_create_subnets_with_overlapping_cidr_blocks():
    ec2 = boto3.resource("ec2", region_name="us-west-1")

    vpc = ec2.create_vpc(CidrBlock="10.0.0.0/16")
    vpc.reload()
    vpc.is_default.shouldnt.be.ok

    subnet_cidr_block = "10.0.0.0/24"
    with assert_raises(ClientError) as ex:
        subnet1 = ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
        subnet2 = ec2.create_subnet(VpcId=vpc.id, CidrBlock=subnet_cidr_block)
    str(ex.exception).should.equal(
        "An error occurred (InvalidSubnet.Conflict) when calling the CreateSubnet "
        "operation: The CIDR '{}' conflicts with another subnet".format(
            subnet_cidr_block
        )
    )