class CountsTablesController < ApplicationController
  def definition
    locale = resolve_locale!
    definition = CountsResourceDefinition.new(params[:resource])
    render json: { fields: definition.metadata,
                   output_fields: definition.output_fields,
                   filter_fields: definition.filter_metadata,
                   axes: { latest: definition.axes(false), history: definition.axes(true) },
                   name_columns: definition.name_columns,
                   column_aliases: definition.column_aliases,
                   condition_aliases: definition.condition_aliases,
                   grains: CountsAxes::GRAINS,
                   defaults: CountsDefaults.metadata(params[:resource], locale: locale.code) }
  rescue ArgumentError
    head :bad_request
  end

  def index
    resolve_locale!
    render json: CountsTableQuery.new(request.query_parameters).call
  rescue CountsTableQuery::TooManyColumns
    render json: { error: 'too_many_columns', max_columns: CountsTableQuery::MAX_COLUMNS },
           status: :unprocessable_entity
  rescue ActiveRecord::StatementTimeout => error
    Rails.logger.warn("counts_query_timeout: #{ error.class }")
    render json: { error: 'counts_query_timeout' }, status: :service_unavailable
  rescue ArgumentError, TypeError, KeyError, JSON::ParserError
    head :bad_request
  end

  def candidates
    resolve_locale!
    render json: CountsCandidates.new(request.query_parameters.merge(
        'resource' => request.path_parameters[:resource])).call
  rescue ArgumentError, TypeError, KeyError
    head :bad_request
  end
end