"""Ensure CloudFront response headers policy has Strict Transport Security configured."""


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

import tools


class CloudFrontResponseHeadersStrictTransportSecurity(BaseResourceCheck):
    def __init__(self):
        name = 'Ensure CloudFront response headers policy has Strict Transport Security configured'
        id = 'ORCD_AWS_5'
        categories = [CheckCategories.NETWORKING]
        supported_resources = ['aws_cloudfront_response_headers_policy']
        guideline = 'https://www.notion.so/Checkov-guide-e5c30d67d35248ebbb0806df59775e0e#ffacf1217e554431915daf1644e8ad8e'
        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):
            strict_transport_security_block = \
                tools.flatten(config_block.get('strict_transport_security'))
            if (not strict_transport_security_block
               or not isinstance(strict_transport_security_block, dict)):
                return CheckResult.FAILED

            override_attribute = \
                tools.flatten(strict_transport_security_block.get('override'))
            max_age_attribute = \
                tools.flatten(strict_transport_security_block.get(
                    'access_control_max_age_sec'))

            if not override_attribute:
                return CheckResult.FAILED
            if (not max_age_attribute
               or int(max_age_attribute) < 365 * 24 * 60 * 60):
                return CheckResult.FAILED

        return CheckResult.PASSED


check = CloudFrontResponseHeadersStrictTransportSecurity()