class SeyrenAPI

# File lib/seyren_api.rb, line 10
def initialize(seyren_base_url)
  @seyren_base_url = seyren_base_url
end

# File lib/seyren_api.rb, line 31
def create_seyren_check(check_name, check_graphite_target, check_warn, check_error)
  create_check = {
                  'enabled' => true,
                  'name'    => check_name,
                  'target'  => check_graphite_target,
                  'warn'    => check_warn.to_s,
                  'error'   => check_error.to_s
                 }

  json = create_check.to_json

  cmdout = `curl -si -X POST -d '#{json}' '#{@seyren_base_url}' --header 'Content-Type:application/json'`
  puts cmdout

  http_response_status_code = cmdout[/HTTP\/1\.1 (\d+)/,1]

  seyren_check_id = nil
  if http_response_status_code == '201'
    # e.g. 5192a13ee4b0fe0c215fa33e
    seyren_check_id = cmdout[/\/seyren\/api\/checks\/([0-9a-z]+)/,1]
  end

  return http_response_status_code, seyren_check_id
end

# File lib/seyren_api.rb, line 58
def create_standard_subscription_for_seyren_check(check_id, check_subscriber_email_address)
  create_standard_subscription = {
                                  'enabled'  => true,
                                  'mo'       => true,
                                  'tu'       => true,
                                  'we'       => true,
                                  'th'       => true,
                                  'fr'       => true,
                                  'sa'       => true,
                                  'su'       => true,
                                  'fromTime' => '0000',
                                  'toTime'   => '2359',
                                  'target'   => check_subscriber_email_address,
                                  'type'     => 'EMAIL'
                                 }

  json = create_standard_subscription.to_json
  subscription_url = @seyren_base_url + '/' + check_id + '/subscriptions'

  cmdout = `curl -si -X POST -d '#{json}' '#{subscription_url}' --header 'Content-Type:application/json'`
  puts cmdout

  http_response_status_code = cmdout[/HTTP\/1\.1 (\d+)/,1]

  return http_response_status_code
end

# File lib/seyren_api.rb, line 15
def delete_seyren_check(check_id)
  url = @seyren_base_url + '/' + check_id
  # Caution: "Brittle Code in all functions"
  # any single char change in output from seyren or possibly even
  # curl ver update will mess up the code in this API class.
  # TODO: Preferably switch from curl to any appropriate Ruby lib
  # that can help with the http call + parsing of results/codes/json response.
  cmdout = `curl -si -X DELETE #{url}`
  puts cmdout

  http_response_status_code = cmdout[/HTTP\/1\.1 (\d+)/,1]

  return http_response_status_code
end

# File lib/seyren_api.rb, line 110
def fetch_all_seyren_checks()
  cmdout = `curl -si '#{@seyren_base_url}'`
  puts cmdout

  json = cmdout[/^(\{\"values\":.*)/,1]
  http_response_status_code = cmdout[/HTTP\/1\.1 (\d+)/,1]

  seyren_id_to_check_hash = Hash.new
  if http_response_status_code == '200'
    parsed_checks = JSON.parse(json)
    parsed_checks['values'].each do |check|
      seyren_id_to_check_hash[check['id']] = check
    end
  end

  return http_response_status_code, seyren_id_to_check_hash
end

# File lib/seyren_api.rb, line 147
def fetch_seyren_check(check_id)
  url = @seyren_base_url + '/' + check_id

  cmdout = `curl -si '#{url}'`
  puts cmdout

  json = cmdout[/^(\{\"id\":.*)/,1]
  http_response_status_code = cmdout[/HTTP\/1\.1 (\d+)/,1]

  seyren_check_hash = Hash.new
  if http_response_status_code == '200'
    seyren_check_hash = JSON.parse(json)
  end

  return http_response_status_code, seyren_check_hash
end