#!/usr/bin/python3
#
# Copyright: 2014 Sipwise Development Team <support@sipwise.com>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This package is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# On Debian systems, the complete text of the GNU General
# Public License version 3 can be found in "/usr/share/common-licenses/GPL-3".
#
import argparse
import csv
import os
import sys
import xmlrpc.client

KAM_URL = "http://127.0.0.1:5062"
KAM_LINES = 10

proxy = xmlrpc.client.ServerProxy(KAM_URL)


def get_headers(line, prefix):
    res = []
    for i in line:
        res.append("%s%s" % (prefix, i))
    return res


def sum_row(s, r):
    for i in ["used", "real_used", "free"]:
        s[i] = s[i] + r[i]


def save_data(datafile, headers, prefix, res):
    show_headers = get_headers(headers, prefix)
    with open(datafile, "w+") as csvfile:
        spamwriter = csv.writer(csvfile)
        spamwriter.writerow(show_headers)
        spamwriter = csv.DictWriter(csvfile, headers, extrasaction="ignore")
        for row in res:
            spamwriter.writerow(row)


def get_pvm(private_file):
    res = [
        {"pid": "SUM", "used": 0, "real_used": 0, "free": 0},
    ]
    headers = ["pid", "used", "real_used", "free"]
    prefix = "rss_"
    try:
        for i in range(KAM_LINES):
            row = proxy.pkg.stats("index", i)[0]
            res.append(row)
            sum_row(res[0], row)
    except xmlrpc.client.Fault as err:
        print("A fault occurred")
        print("Fault code: %d" % err.faultCode)
        print("Fault string: %s" % err.faultString)
        sys.exit(-1)
    except xmlrpc.client.ProtocolError as err:
        print("A protocol error occurred")
        print("URL: %s" % err.url)
        print("HTTP/HTTPS headers: %s" % err.headers)
        print("Error code: %d" % err.errcode)
        print("Error message: %s" % err.errmsg)
        sys.exit(-2)
    save_data(private_file, headers, prefix, res[:1])
    fileName, fileExtension = os.path.splitext(private_file)
    private_file_pp = "%s_per_pid%s" % (fileName, fileExtension)
    save_data(private_file_pp, headers, prefix, res[2:])


def get_shm(share_file):
    headers = ["used", "real_used", "max_used", "free", "fragments", "total"]
    prefix = "shared_"
    try:
        res = proxy.core.shmmem("b")
    except xmlrpc.client.Fault as err:
        print("A fault occurred")
        print("Fault code: %d" % err.faultCode)
        print("Fault string: %s" % err.faultString)
        sys.exit(-1)
    except xmlrpc.client.ProtocolError as err:
        print("A protocol error occurred")
        print("URL: %s" % err.url)
        print("HTTP/HTTPS headers: %s" % err.headers)
        print("Error code: %d" % err.errcode)
        print("Error message: %s" % err.errmsg)
        sys.exit(-2)
    save_data(
        share_file,
        headers,
        prefix,
        [
            res,
        ],
    )


def main():
    parser = argparse.ArgumentParser(
        description="export to csv kamailio proxy stats."
    )
    parser.add_argument(
        "--private_file",
        "-P",
        nargs="?",
        default="pvm.csv",
        help="path to the private csv file",
    )
    parser.add_argument(
        "--share_file",
        "-S",
        nargs="?",
        default="shm.csv",
        help="path to the share csv file",
    )
    parser.add_argument(
        "--rpc_url",
        nargs="?",
        default=KAM_URL,
        help="rpc URL of kamailio. Default:%s" % KAM_URL,
    )
    args = parser.parse_args()

    get_pvm(args.private_file)
    get_shm(args.share_file)


if __name__ == "__main__":
    main()
