"""Ensure CloudFront response headers policy has Frame Options configured."""


from checkov.common.models.enums import CheckCategories, CheckResult
from checkov.terraform.checks.resource.base_resource_check import BaseResourceCheck

import tools


class CloudFrontResponseHeadersFrameOptions(BaseResourceCheck):
    def __init__(self):
        name = 'Ensure CloudFront response headers policy has Frame Options configured'
        id = 'ORCD_AWS_8'
        categories = [CheckCategories.NETWORKING]
        supported_resources = ['aws_cloudfront_response_headers_policy']
        guideline = 'https://www.notion.so/Checkov-guide-e5c30d67d35248ebbb0806df59775e0e#b2afdcd11c4844179e3eddce1ca6263e'
        super().__init__(name=name, id=id, categories=categories,
                         supported_resources=supported_resources,
                         guideline=guideline)

    def scan_resource_conf(self, conf):
        config_block = tools.flatten(conf.get('security_headers_config'))
        if config_block and isinstance(config_block, dict):
            frame_options_block = \
                tools.flatten(config_block.get('frame_options'))

            if (not frame_options_block
               or not isinstance(frame_options_block, dict)):
                return CheckResult.FAILED

            override_attribute = \
                tools.flatten(frame_options_block.get('override'))
            frame_option_attribute = \
                tools.flatten(frame_options_block.get('frame_option'))

            frame_option_allowed = ['DENY', 'SAMEORIGIN']

            if not (override_attribute
                    and frame_option_attribute in frame_option_allowed):
                return CheckResult.FAILED

        return CheckResult.PASSED


check = CloudFrontResponseHeadersFrameOptions()