require "uri"

module OpsWorks
  module SCM
    module S3
      def self.parse_uri(uri)
        uri = URI.parse(uri)
        uri_path_components = uri.path.split("/").reject{|p| p.empty?}
        virtual_host_match = uri.host.match(/\A(.+)\.s3(?:-(?:ap|eu|sa|us)-.+-\d)?\.amazonaws\.com/i)
        if virtual_host_match
          # virtual-hosted-style: http://bucket.s3.amazonaws.com or http://bucket.s3-aws-region.amazonaws.com
          bucket = virtual_host_match[1]
          remote_path = uri_path_components.join("/")
        else
          # path-style: http://s3.amazonaws.com/bucket or http://s3-aws-region.amazonaws.com/bucket
          bucket = uri_path_components[0]
          remote_path = uri_path_components[1..-1].join("/")
        end

        [bucket, remote_path]
      end
    end
  end
end