require 'active_support'

module Softwear
  module ErrorCatcher
    extend ActiveSupport::Concern

    included do
      rescue_from Exception, StandardError, with: :error_report_form unless Rails.env.test?
    end

    protected

    def iterm_annotation(content)
      puts "=======================================================\033]1337;AddAnnotation=#{content}\a"
    end

    def error_report_form(error)
      time_of_error = Time.now.strftime("%x %I:%M %p")

      iterm_annotation("Begin #{error.class.name} (#{time_of_error})")
      Rails.logger.error "**** #{error.class.name}: #{error.message} ****\n\n"\
        "\t#{error.backtrace.join("\n\t")}"
      iterm_annotation("End #{error.class.name} (#{time_of_error})")

      @error = error
      @additional_info = gather_additional_info

      begin
        respond_to do |format|
          format.html { render 'softwear/errors/internal_server_error', layout: layout_for_error, status: 500 }
          format.js   { render 'softwear/errors/internal_server_error', layout: layout_for_error, status: 500 }
          format.json { render json: '{}', status: 500 }
        end
      rescue AbstractController::DoubleRenderError => e
        Rails.logger.error "DOUBLE RENDER ERROR IN CONTROLLER ERROR CATCHER!!! #{e.message}"
      end
    end

    def filter_params(params)
      new_hash = {}
      params.each do |key, value|
        new_value = value

        case value
        when Hash
          new_value = filter_params(value)
        else
          case key.to_s
          when /cc_number/ then new_value = "<FILTERED>"
          when /cc_cvc/    then new_value = "<FILTERED>"
          when /password/  then new_value = "<FILTERED>"
          end
        end

        new_hash[key] = new_value
      end
      new_hash
    end

    def gather_additional_info
      JSON.pretty_generate(filter_params(params)) + "|||" +
      instance_variables
        .reject { |v| /^@_/ =~ v.to_s || %i(@view_renderer @output_buffer @view_flow @error).include?(v) }
        .map { |v| "#{v}: #{instance_variable_get(v).inspect rescue '(ERROR)'}" }
        .join("|||")
    end

    def layout_for_error
      user = try(:current_user) || @current_user
      user ? "application" : "no_overlay"
    end
  end
end