require 'net/http'
require 'uri'

module Irc

  # miscellaneous useful functions
  module Utils

    # turn a number of seconds into a human readable string, e.g
    # 2 days, 3 hours, 18 minutes, 10 seconds
    def Utils.secs_to_string(secs)
      ret = ""
      days = (secs / (60 * 60 * 24)).to_i
      secs = secs % (60 * 60 * 24)
      hours = (secs / (60 * 60)).to_i
      secs = (secs % (60 * 60))
      mins = (secs / 60).to_i
      secs = (secs % 60).to_i
      ret += "#{days} days, " if days > 0
      ret += "#{hours} hours, " if hours > 0 || days > 0
      ret += "#{mins} minutes and " if mins > 0 || hours > 0 || days > 0
      ret += "#{secs} seconds"
      return ret
    end


    def Utils.safe_exec(command, *args)
      IO.popen("-") {|p|
        if(p)
          return p.readlines.join("\n")
        else
          begin
            $stderr = $stdout
            exec(command, *args)
          rescue Exception => e
            puts "exec of #{command} led to exception: #{e}"
            Kernel::exit! 0
          end
          puts "exec of #{command} failed"
          Kernel::exit! 0
        end
      }
    end

    # returns a string containing the result of an HTTP GET on the uri
    def Utils.http_get(uristr, readtimeout=8, opentimeout=4)

      # ruby 1.7 or better needed for this (or 1.6 and debian unstable)
      Net::HTTP.version_1_2
      # (so we support the 1_1 api anyway, avoids problems)

      uri = URI.parse uristr
      query = uri.path
      if uri.query
        query += "?#{uri.query}"
      end

      proxy_host = nil
      proxy_port = nil
      if(ENV['http_proxy'] && proxy_uri = URI.parse(ENV['http_proxy']))
        proxy_host = proxy_uri.host
        proxy_port = proxy_uri.port
      end

      begin
        http = Net::HTTP.new(uri.host, uri.port, proxy_host, proxy_port)
        http.open_timeout = opentimeout
        http.read_timeout = readtimeout

        http.start {|http|
          resp = http.get(query)
          if resp.code == "200"
            return resp.body
          end
        }
      rescue => e
        # cheesy for now
        $stderr.puts "Utils.http_get exception: #{e}, while trying to get #{uristr}"
        return nil
      end
    end
  end
end