class AwsBillingReport

def backend
  @backend ||= BackendFactory.create(inspec_runner)
end

def daily?
  exists? ? time_unit.eql?("daily") : nil
end

def fetch_from_api
  report = find_report(report_name)
  @exists = !report.nil?
  if exists?
    @time_unit = report.time_unit.downcase
    @format = report.format.downcase
    @compression = report.compression.downcase
    @s3_bucket = report.s3_bucket
    @s3_prefix = report.s3_prefix
    @s3_region = report.s3_region
  end
end

def find_report(report_name)
  pagination_opts = {}
  found_report_def = nil
  while found_report_def.nil?
    api_result = backend.describe_report_definitions(pagination_opts)
    next_token = api_result.next_token
    found_report_def = api_result.report_definitions.find { |report_def| report_def.report_name == report_name }
    pagination_opts = { next_token: next_token }
    next if found_report_def.nil? && next_token        # Loop again: didn't find it, but there are more results
    break if found_report_def.nil? && next_token.nil?  # Give up: didn't find it, no more results
  end
  found_report_def
end

def gzip?
  exists? ? compression.eql?("gzip") : nil
end

def hourly?
  exists? ? time_unit.eql?("hourly") : nil
end

def to_s
  "AWS Billing Report #{report_name}"
end

def validate_params(raw_params)
  validated_params = check_resource_param_names(
    raw_params: raw_params,
    allowed_params: [:report_name],
    allowed_scalar_name: :report_name,
    allowed_scalar_type: String
  )
  if validated_params.empty?
    raise ArgumentError, "You must provide the parameter 'report_name' to aws_billing_report."
  end
  validated_params
end

def zip?
  exists? ? compression.eql?("zip") : nil
end