#! /usr/bin/env python
# 
# Copyright (c) 2011 SEOmoz
# 
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
# 
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

import os
import pymysql
import datetime
from sauron import logger
from sauron.metrics import Metric, MetricException

class SphinxMetric(Metric):
  """
  return 1 during the given timeframe. This can be used for self implementing
  scheduled autoscaling

  Attributes:
     host (string): the ip of your Sphinxhost (default: 127.0.0.1)
     port (int): the port for Sphinx (default: 9306)

  """

  def reconfig(self, **kwargs):
    Metric.reconfig(self, **kwargs)
    self.conn   = None
    self.cur    = None
  
  def __del__(self):
    try:
        self.cur.close()
        self.conn.close()
    except AttributeError:
        pass
  
  def values(self):
    try:
      self.conn = pymysql.connect(host=self.host, port=self.port)
      self.cur = self.conn.cursor()
      self.cur.execute('show status')
      r = dict(self.cur.fetchall())
      return {
        'results' : {
          'uptime'   : (r['uptime'], 'Seconds'),
          'queries'  : (r['queries'], 'Count'),
          'avg_wall' : (r['avg_query_wall'], 'Seconds'),
          'avg_cpu'  : (r['avg_query_cpu'], 'Percent'),
          'avg_read' : (r['avg_query_readkb'], 'Kilobytes')
        }
      }
    except pymysql.err.MySQLError:
      raise MetricException('Error connecting to sphinx searchd')
    except KeyError:
      raise MetricException('Could not find all keys in searchd status')
