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#   http://www.apache.org/licenses/LICENSE-2.0                                                                        #
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from pathlib import Path

from aws_cdk.aws_lambda import Runtime, RuntimeFamily, Tracing
from aws_cdk.aws_s3 import Bucket
from aws_cdk.aws_stepfunctions import StateMachine
from aws_cdk.core import Construct

from aws_solutions.cdk.aws_lambda.python.function import SolutionsPythonFunction
from aws_solutions.cdk.cfn_nag import add_cfn_nag_suppressions, CfnNagSuppression


class S3EventHandler(SolutionsPythonFunction):
    def __init__(
        self,
        scope: Construct,
        construct_id: str,
        state_machine: StateMachine,
        bucket: Bucket,
        **kwargs
    ):
        entrypoint = (
            Path(__file__).absolute().parents[4]
            / "lambdas"
            / "notification"
            / "handler.py"
        )
        function = "notification"
        kwargs["runtime"] = Runtime("python3.8", RuntimeFamily.PYTHON)
        kwargs["tracing"] = Tracing.ACTIVE

        super().__init__(scope, construct_id, entrypoint, function, **kwargs)
        self.add_environment("STATE_MACHINE_ARN", state_machine.state_machine_arn)

        state_machine.grant_start_execution(self)
        bucket.grant_read(self, objects_key_pattern="train/*")
        add_cfn_nag_suppressions(
            self.role.node.try_find_child("DefaultPolicy").node.find_child("Resource"),
            [
                CfnNagSuppression(
                    "W12", "IAM policy for AWS X-Ray requires an allow on *"
                )
            ],
        )