"""Lambda Function Response."""

import json

from hooks.lambda_invoke.function_error import LambdaFunctionErrorState


class LambdaFunctionResponse:
    """Lambda Function Response interface object.

    Handles the parsing of a function return value.
    """

    def __init__(self, response):
        """Set default state and parse lambda invocation response."""
        self.error = None
        self.payload = None
        if response.get('Payload'):
            self.parse_payload(response)
        self.error = LambdaFunctionErrorState(response, self.payload)

    def parse_payload(self, response):
        """Parse the function return value."""
        payload = response.get('Payload').read().decode()
        if payload:
            self.payload = json.loads(payload)

    def dump(self):
        """Return state as a dict for testing and debugging."""
        return {
            'error': self.error.dump(),
            'payload': self.payload,
            'succeeded': self.succeeded
        }

    @property
    def succeeded(self):
        """Return the success status as a boolean."""
        return False if self.error.handler else True