##############################################################################
# Copyright (c) 2015 Huawei Technologies Co.,Ltd. and others
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################


import subprocess as subp


def exec_shell(cmd):
    out, err = subp.Popen(cmd, stdout=subp.PIPE, shell=True).communicate()
    return out.strip()


def get_onetime_data(dir_name):
    cmd = ("grep -in 'remote client nodes' %s/index.html|awk "
           "'{print $5}'|awk -F '<' '{print $1}'" % dir_name)
    client_node_num = int(exec_shell(cmd))
    cmd = ("grep -n 'Number of clients' %s/index.html|awk "
           "'{print $5}'|awk -F '<' '{print $1}'" % dir_name)
    each_client_num = int(exec_shell(cmd))
    total_client = (client_node_num + 1) * each_client_num

    cmd = ('grep -n "throughput" %s/stat_client*.html |awk -F "<B>"'
           ' \'{if (FNR%%2==0 && FNR%%4!=0) {printf "%%s\\n", $3}}\'|awk \''
           'BEGIN{sum=0;}{sum=sum+$1;}END{print sum}\'' % dir_name)
    throughput = int(exec_shell(cmd))

    cmd = ('grep -n "Total" %s/stat_client*.html |awk -F "<B>"'
           ' \'{if (FNR==4) {printf "%%s\\n", $4}}\'|awk -F "</B>"'
           ' \'BEGIN{sum=0;}{sum=sum+$1;}END{print sum}\'' % dir_name)
    request = int(exec_shell(cmd))

    cmd = ('grep -n "Total" %s/stat_client*.html |awk -F "<B>"'
           ' \'{if (FNR==4) {printf "%%s\\n", $5}}\'|awk -F "</B>"'
           ' \'BEGIN{sum=0;}{sum=sum+$1;}END{print sum}\'' % dir_name)
    error_request = int(exec_shell(cmd))

    return total_client, throughput, request, error_request


class RubbosCollector(object):

    def __init__(self):
        pass

    def collect_data(self, data_home):
        cmd = 'ls -l %s |grep ^d|awk \'{print $9}\'' % data_home
        result = []
        for subdir in exec_shell(cmd).split('\n'):
            total_client, throughput, request, error_request = \
                get_onetime_data(data_home + '/' + subdir)
            result.append({'client': total_client,
                           'throughput': throughput,
                           'request': request,
                           'error_request': error_request})
        result.sort(key=lambda x: x['client'])

        return result