# ***************************************************************************************
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from aws_cdk import core, aws_sns
from aws_cdk.aws_codepipeline_actions import ManualApprovalAction
from aws_cdk.core import CfnParameter, Stack


class ApprovalStage:

    def __init__(self):
        self._obj = None

    def _set_common_params(self, scope):
        if self._obj is not None: return

        self._obj = object()

        stack_scope = Stack.of(scope)

        self._cfn_approver_email_parameter = CfnParameter(stack_scope, f"EmailApprover", type="String",
                                                          description="The email address of the approver, e.g. myemail@email.com")
        email = self._cfn_approver_email_parameter.value_as_string
        self._topic = aws_sns.Topic(stack_scope, id="approval", display_name=None)
        aws_sns.Subscription(stack_scope, id="notify", topic=self._topic,
                             endpoint=email,
                             protocol=aws_sns.SubscriptionProtocol.EMAIL)

    def get_stage(self, scope: core.Construct, env: str, stage: str):
        self._set_common_params(scope)
        action = ManualApprovalAction(action_name=f"PromoteTo{env}",
                                      notification_topic=self._topic)

        return action