require 'net/http'

class SeleniumTestRunner
  def initialize(browser, browser_path)
    @browser = browser
    @browser_path = browser_path
    run
  end
  
  def run
    port = available_port
    
    server = IO.popen("ruby script/server -e test -p #{port} > #{RUBY_PLATFORM =~ /mswin/ ? 'NUL' : '/dev/null' } 2>&1")
    wait_until :max_time => 30 do !port_available? port end
    
    browser = IO.popen("#{@browser_path} #{url(port)}")
    wait_until :max_time => 600 do port_available? port end
    
    Process.kill 9, server.pid rescue nil
    Process.kill 9, browser.pid rescue nil
    
    result_file = "selenium_test_results_port_#{port}.log"
    if File.exists?(result_file)
      puts File.read(result_file)
      File.delete(result_file)
    else
      puts "Results file (#{result_file}) was not written"
    end
  end
  
  def available_port
    (3001..3100).find { |p| port_available? p } || raise('no available port found')
  end
  
  private
    def wait_until(options = {}, &block)
      waited = 0
      interval, max = options[:interval] || 5, options[:max_time] || 120
      until yield do
        waited += sleep interval
        return if waited > max
      end
    end
    
    def port_available?(port)
      Net::HTTP.get_response 'localhost', url(port), port
      false
    rescue
      true
    end
    
    def url(port)
      "http://localhost:#{port}/selenium/TestRunner.html?auto=true"
    end
end