from uuid import uuid4

import boto3
import pytest
from botocore.exceptions import ClientError

from moto import mock_ec2, mock_iam
from tests import EXAMPLE_AMI_ID


def quick_instance_creation():
    conn_ec2 = boto3.resource("ec2", "us-east-1")
    test_instance = conn_ec2.create_instances(
        ImageId=EXAMPLE_AMI_ID, MinCount=1, MaxCount=1
    )
    # We only need instance id for this tests
    return test_instance[0].id


def quick_instance_profile_creation(name):
    conn_iam = boto3.resource("iam", "us-east-1")
    test_instance_profile = conn_iam.create_instance_profile(
        InstanceProfileName=name, Path="/"
    )
    return test_instance_profile.arn, test_instance_profile.name


@mock_ec2
@mock_iam
def test_associate():
    client = boto3.client("ec2", region_name="us-east-1")
    instance_id = quick_instance_creation()
    instance_profile_arn, instance_profile_name = quick_instance_profile_creation(
        str(uuid4())
    )

    association = client.associate_iam_instance_profile(
        IamInstanceProfile={
            "Arn": instance_profile_arn,
            "Name": instance_profile_name,
        },
        InstanceId=instance_id,
    )
    assert association["IamInstanceProfileAssociation"]["InstanceId"] == instance_id
    assert (
        association["IamInstanceProfileAssociation"]["IamInstanceProfile"]["Arn"]
        == instance_profile_arn
    )
    assert association["IamInstanceProfileAssociation"]["State"] == "associating"


@mock_ec2
@mock_iam
def test_invalid_associate():
    client = boto3.client("ec2", region_name="us-east-1")
    instance_id = quick_instance_creation()
    instance_profile_arn, instance_profile_name = quick_instance_profile_creation(
        str(uuid4())
    )

    client.associate_iam_instance_profile(
        IamInstanceProfile={
            "Arn": instance_profile_arn,
            "Name": instance_profile_name,
        },
        InstanceId=instance_id,
    )

    # Duplicate
    with pytest.raises(ClientError) as ex:
        client.associate_iam_instance_profile(
            IamInstanceProfile={
                "Arn": instance_profile_arn,
                "Name": instance_profile_name,
            },
            InstanceId=instance_id,
        )
    assert ex.value.response["Error"]["Code"] == "IncorrectState"
    assert (
        "There is an existing association for" in ex.value.response["Error"]["Message"]
    )

    # Wrong instance profile
    with pytest.raises(ClientError) as ex:
        client.associate_iam_instance_profile(
            IamInstanceProfile={"Arn": "fake", "Name": "fake"}, InstanceId=instance_id
        )
    assert ex.value.response["Error"]["Code"] == "NoSuchEntity"
    assert "not found" in ex.value.response["Error"]["Message"]

    # Wrong instance id
    with pytest.raises(ClientError) as ex:
        client.associate_iam_instance_profile(
            IamInstanceProfile={
                "Arn": instance_profile_arn,
                "Name": instance_profile_name,
            },
            InstanceId="fake",
        )
    assert ex.value.response["Error"]["Code"] == "InvalidInstanceID.NotFound"
    assert "does not exist" in ex.value.response["Error"]["Message"]


@mock_ec2
@mock_iam
def test_describe():
    client = boto3.client("ec2", region_name="us-east-1")

    instance_id1 = quick_instance_creation()
    instance_profile_arn1, instance_profile_name1 = quick_instance_profile_creation(
        str(uuid4())
    )
    client.associate_iam_instance_profile(
        IamInstanceProfile={
            "Arn": instance_profile_arn1,
            "Name": instance_profile_name1,
        },
        InstanceId=instance_id1,
    )
    associations = client.describe_iam_instance_profile_associations()
    associations = associations["IamInstanceProfileAssociations"]
    assert instance_profile_arn1 in [
        a["IamInstanceProfile"]["Arn"] for a in associations
    ]
    my_assoc = [
        a
        for a in associations
        if a["IamInstanceProfile"]["Arn"] == instance_profile_arn1
    ][0]
    assert my_assoc["InstanceId"] == instance_id1
    assert my_assoc["State"] == "associated"

    instance_id2 = quick_instance_creation()
    instance_profile_arn2, instance_profile_name2 = quick_instance_profile_creation(
        str(uuid4())
    )
    client.associate_iam_instance_profile(
        IamInstanceProfile={
            "Arn": instance_profile_arn2,
            "Name": instance_profile_name2,
        },
        InstanceId=instance_id2,
    )

    associations = client.describe_iam_instance_profile_associations()
    associations = associations["IamInstanceProfileAssociations"]
    assert instance_profile_arn1 in [
        a["IamInstanceProfile"]["Arn"] for a in associations
    ]
    assert instance_profile_arn2 in [
        a["IamInstanceProfile"]["Arn"] for a in associations
    ]
    my_assoc = [
        a
        for a in associations
        if a["IamInstanceProfile"]["Arn"] == instance_profile_arn1
    ][0]

    associations = client.describe_iam_instance_profile_associations(
        AssociationIds=[my_assoc["AssociationId"]]
    )
    assert len(associations["IamInstanceProfileAssociations"]) == 1
    assert (
        associations["IamInstanceProfileAssociations"][0]["IamInstanceProfile"]["Arn"]
        == my_assoc["IamInstanceProfile"]["Arn"]
    )

    associations = client.describe_iam_instance_profile_associations(
        Filters=[
            {"Name": "instance-id", "Values": [my_assoc["InstanceId"]]},
            {"Name": "state", "Values": ["associated"]},
        ]
    )
    assert len(associations["IamInstanceProfileAssociations"]) == 1
    assert (
        associations["IamInstanceProfileAssociations"][0]["IamInstanceProfile"]["Arn"]
        == my_assoc["IamInstanceProfile"]["Arn"]
    )


@mock_ec2
@mock_iam
def test_replace():
    client = boto3.client("ec2", region_name="us-east-1")
    instance_id1 = quick_instance_creation()
    instance_profile_arn1, instance_profile_name1 = quick_instance_profile_creation(
        str(uuid4())
    )
    instance_profile_arn2, instance_profile_name2 = quick_instance_profile_creation(
        str(uuid4())
    )

    association = client.associate_iam_instance_profile(
        IamInstanceProfile={
            "Arn": instance_profile_arn1,
            "Name": instance_profile_name1,
        },
        InstanceId=instance_id1,
    )

    association = client.replace_iam_instance_profile_association(
        IamInstanceProfile={
            "Arn": instance_profile_arn2,
            "Name": instance_profile_name2,
        },
        AssociationId=association["IamInstanceProfileAssociation"]["AssociationId"],
    )

    assert (
        association["IamInstanceProfileAssociation"]["IamInstanceProfile"]["Arn"]
        == instance_profile_arn2
    )
    assert association["IamInstanceProfileAssociation"]["State"] == "associating"


@mock_ec2
@mock_iam
def test_invalid_replace():
    client = boto3.client("ec2", region_name="us-east-1")
    instance_id = quick_instance_creation()
    instance_profile_arn, instance_profile_name = quick_instance_profile_creation(
        str(uuid4())
    )
    instance_profile_arn2, instance_profile_name2 = quick_instance_profile_creation(
        str(uuid4())
    )

    association = client.associate_iam_instance_profile(
        IamInstanceProfile={
            "Arn": instance_profile_arn,
            "Name": instance_profile_name,
        },
        InstanceId=instance_id,
    )

    # Wrong id
    with pytest.raises(ClientError) as ex:
        client.replace_iam_instance_profile_association(
            IamInstanceProfile={
                "Arn": instance_profile_arn2,
                "Name": instance_profile_name2,
            },
            AssociationId="fake",
        )
    assert ex.value.response["Error"]["Code"] == "InvalidAssociationID.NotFound"
    assert "An invalid association-id of" in ex.value.response["Error"]["Message"]

    # Wrong instance profile
    with pytest.raises(ClientError) as ex:
        client.replace_iam_instance_profile_association(
            IamInstanceProfile={"Arn": "fake", "Name": "fake"},
            AssociationId=association["IamInstanceProfileAssociation"]["AssociationId"],
        )
    assert ex.value.response["Error"]["Code"] == "NoSuchEntity"
    assert "not found" in ex.value.response["Error"]["Message"]


@mock_ec2
@mock_iam
def test_disassociate():
    client = boto3.client("ec2", region_name="us-east-1")
    instance_id = quick_instance_creation()
    instance_profile_arn, instance_profile_name = quick_instance_profile_creation(
        str(uuid4())
    )

    association = client.associate_iam_instance_profile(
        IamInstanceProfile={
            "Arn": instance_profile_arn,
            "Name": instance_profile_name,
        },
        InstanceId=instance_id,
    )

    associations = client.describe_iam_instance_profile_associations()
    associations = associations["IamInstanceProfileAssociations"]
    assert instance_profile_arn in [
        a["IamInstanceProfile"]["Arn"] for a in associations
    ]

    disassociation = client.disassociate_iam_instance_profile(
        AssociationId=association["IamInstanceProfileAssociation"]["AssociationId"]
    )

    assert (
        disassociation["IamInstanceProfileAssociation"]["IamInstanceProfile"]["Arn"]
        == instance_profile_arn
    )
    assert disassociation["IamInstanceProfileAssociation"]["State"] == "disassociating"

    associations = client.describe_iam_instance_profile_associations()
    associations = associations["IamInstanceProfileAssociations"]
    assert instance_profile_arn not in [
        a["IamInstanceProfile"]["Arn"] for a in associations
    ]


@mock_ec2
@mock_iam
def test_invalid_disassociate():
    client = boto3.client("ec2", region_name="us-east-1")

    # Wrong id
    with pytest.raises(ClientError) as ex:
        client.disassociate_iam_instance_profile(AssociationId="fake")
    assert ex.value.response["Error"]["Code"] == "InvalidAssociationID.NotFound"
    assert "An invalid association-id of" in ex.value.response["Error"]["Message"]