require 'pp'
require 'rubygems'
require 'json'
require 'httpclient'

username = ARGV[0]
password = ARGV[1]
api_key  = ARGV[2]
list_id = ARGV[3]

if ! username || ! password || ! api_key || ! list_id
    print "

      Usage: ruby clear_list.rb username password api_key list_id


      "

        exit 1
end

client = HTTPClient.new
user = username
password = password
client.set_auth(nil, user, password)

print "Cleaning out list id #{list_id}; this might take a while.\n"

res = client.get_content(
  "http://api.smart.fm/lists/#{list_id}.json",
  { 'include_items' => 1 }
)

sleep 1
while JSON.parse(res)["items_count"] > 0
  JSON.parse(res)["items"].each { |item|
    begin
      print "Removing item #{item['id']} from the list\n"
      res = client.delete(
        "http://api.smart.fm/lists/#{list_id}/items/#{item["id"]}?api_key=#{api_key}"
      )
      if res.body.content != "" || res.header.status_code.to_i >= 300 || res.header.status_code.to_i < 200
        print "Whoops, seems to have not worked; error: #{res.body.content}\n"
        raise Exception.new(true)
      end

      #pp res
      # the res is not json

    rescue Exception => problem
      #pp problem
      print "Had an error removing item #{item['id']}: #{problem}\n"

      sleep 5
    end

    sleep 1
  }

  res = client.get_content(
    "http://api.smart.fm/lists/#{list_id}.json",
    { 'include_items' => 1 }
  )
end

print "Done cleaning out the list.\n"