# frozen_string_literal: true

class CloudfrontConfigService
  def initialize(bucket, tags = [])
    @bucket = bucket
    @tags = tags
  end

  def to_s
    bucket_config.to_json.strip
  end

  private

  def bucket_config
    {
      DistributionConfig: {
        CallerReference: unique_caller_reference,
        Origins: {
          Quantity: 1,
          Items: [
            {
              Id: "S3-#{@bucket}",
              DomainName: "#{@bucket}.s3.amazonaws.com",
              OriginPath: '',
              CustomHeaders: {
                Quantity: 0
              },
              S3OriginConfig: {
                OriginAccessIdentity: ''
              }
            }
          ]
        },
        DefaultCacheBehavior: {
          TargetOriginId: "S3-#{@bucket}",
          ForwardedValues: {
            QueryString: false,
            Cookies: {
              Forward: 'none'
            },
            Headers: {
              Quantity: 0
            },
            QueryStringCacheKeys: {
              Quantity: 0
            }
          },
          TrustedSigners: {
            Enabled: false,
            Quantity: 0
          },
          ViewerProtocolPolicy: 'redirect-to-https',
          MinTTL: 0,
          AllowedMethods: {
            Quantity: 2,
            Items: %w[
              HEAD
              GET
            ],
            CachedMethods: {
              Quantity: 2,
              Items: %w[
                HEAD
                GET
              ]
            }
          },
          SmoothStreaming: false,
          DefaultTTL: 86_400,
          MaxTTL: 31_536_000,
          Compress: true,
          LambdaFunctionAssociations: {
            Quantity: 0
          }
        },
        CacheBehaviors: {
          Quantity: 0
        },
        CustomErrorResponses: {
          Quantity: 0
        },
        Comment: '',
        Logging: {
          Enabled: false,
          IncludeCookies: false,
          Bucket: '',
          Prefix: ''
        },
        PriceClass: 'PriceClass_100',
        Enabled: true,
        ViewerCertificate: {
          CloudFrontDefaultCertificate: true,
          MinimumProtocolVersion: 'TLSv1.2_2018',
          CertificateSource: 'cloudfront'
        },
        Restrictions: {
          GeoRestriction: {
            RestrictionType: 'none',
            Quantity: 0
          }
        },
        WebACLId: '',
        HttpVersion: 'http2',
        IsIPV6Enabled: true
      },
      Tags: {
        Items: @tags
      }
    }
  end

  def unique_caller_reference
    "#{Time.now.getutc.to_i}-#{@bucket}"
  end
end