class Honeybadger::Rack::UserInformer

def agent
  @agent || Honeybadger::Agent.instance
end

def call(env)
  status, headers, body = @app.call(env)
  if env["honeybadger.error_id"]
    new_body = []
    replace = replacement(env["honeybadger.error_id"])
    body.each do |chunk|
      new_body << chunk.gsub("<!-- HONEYBADGER ERROR -->", replace)
    end
    body.close if body.respond_to?(:close)
    # Delete both cases to handle Rack 2 (mixed case) and Rack 3 (lowercase) headers
    headers.delete("Transfer-Encoding")
    headers.delete("transfer-encoding")
    # Also normalize Content-Length - delete both cases before setting
    headers.delete("Content-Length")
    headers.delete("content-length")
    headers["content-length"] = new_body.reduce(0) { |a, e| a + e.bytesize }.to_s
    body = new_body
  end
  [status, headers, body]
end

def initialize(app, agent = nil)
  @app = app
  @agent = agent.is_a?(Agent) && agent
end

def replacement(with)
  config[:"user_informer.info"].gsub(/\{\{\s*error_id\s*\}\}/, with.to_s)
end