require 'aws-sdk-s3'

module Fastlane
  module Helper
    class S3ClientHelper
      attr_reader :client

      def initialize(access_key: nil, secret_access_key: nil, region: nil)
        creds = Aws::Credentials.new(access_key, secret_access_key)
        Aws.config.update(
          region: region,
          credentials: creds
        )
      end

      def list_buckets
        return client.list_buckets
      end

      def upload_file(bucket_name, file_name, file_data, acl)
        bucket = find_bucket!(bucket_name)
        details = {
          acl: acl,
          key: file_name,
          body: file_data
        }
        obj = bucket.put_object(details)

        # When you enable versioning on a S3 bucket,
        # writing to an object will create an object version
        # instead of replacing the existing object.
        # http://docs.aws.amazon.com/AWSRubySDK/latest/AWS/S3/ObjectVersion.html
        if obj.kind_of?(Aws::S3::ObjectVersion)
          obj = obj.object
        end

        # Return public url
        obj.public_url.to_s
      end

      def delete_file(bucket_name, file_name)
        bucket = find_bucket!(bucket_name)
        file = bucket.object(file_name)
        file.delete
      end

      def find_bucket!(bucket_name)
        bucket = Aws::S3::Bucket.new(bucket_name, client: client)
        raise "Bucket '#{bucket_name}' not found" unless bucket.exists?

        return bucket
      end
    end

    private

    def client
      @client ||= Aws::S3::Client.new
    end
  end
end