#! /usr/bin/env python3
# -*- coding: utf-8 -*-

# Imports
import os
import sys
import time
import datetime 
from calendar import monthrange


# Constantes
STAT_DIR = '/srv/visio.chapril.org/statistiques/'

STATS_TOT_FIELDS = ['total_conferences_created','total_failed_conferences','total_conferences_completed','total_conference_seconds','total_bytes_received','total_bytes_sent','total_participants','conferences','videochannels','endpoints_sending_audio',]
STATS_FR_TOT_FIELDS = ['conferences creees total','conferences totalement echouees','conferences terminees total','duree totale conferences','total octets reçus','total octets envoyés','total participants','nombre de conferences','canaux video','clients en audio',]
STATS_AVG_FIELDS = ['largest_conference',]
STATS_FR_AVG_FIELDS = ['plus grande conference',]

# Classes
class Stats:
    def __init__(self,year,mois):
        self.year = year
        self.mois = mois
        self.files = os.listdir(STAT_DIR)
        self.startDate = self.EndDate = None
        self.consolided = {}
        self.consolided_datas = {}
        self.__initBounds()

    def __initBounds(self):
        self.__setStartDate(f'{self.year}-{self.mois}-01 00:00:00')
        maxDays = monthrange(self.year,self.mois)[1]
        self.__setEndDate(f'{self.year}-{self.mois}-{maxDays} 23:59:59')
    

    def __setStartDate(self,thisDate):
        self.startDate = self.__date2timestamp(thisDate)

    def getStartDate(self):
        if self.startDate is not None:
            return self.startDate
        else:
            return 'undefiined'

    def getEndDate(self):
        if self.endDate is not None:
            return self.endDate
        else:
            return 'undefiined'

    def __setEndDate(self,thisDate):
        self.endDate = self.__date2timestamp(thisDate)

    def __date2timestamp(self,thisDate):
        timestamp = time.mktime(time.strptime(thisDate, '%Y-%m-%d %H:%M:%S'))
        return int(timestamp)

    def __conv(self,octets,dataType='b'):

        if dataType == 'b':
            unit = 'octets'
            if int(octets) > 1024:
                octets = int(octets) / 1024
                unit = 'ko'
            if int(octets) > 1024:
                octets = int(octets) / 1024
                unit = 'Mo'
            if int(octets) > 1024:
                octets = int(octets) / 1024
                unit = 'Go'
        elif dataType == 't':
            unit = 's'
            if int(octets) > 60:
                unit = 'min'
                octets = octets / 60
            if int(octets) > 60:
                unit = 'h'
                octets = octets / 60
        octets = int(octets * 10) / 10
        return octets,unit

    def parse(self):
        if len(self.files) <= 0:
            return None
        for f in self.files:
            ts = int(f.split('.')[0].split('_')[3])
            if ts >= self.startDate and ts <= self.endDate:
                with open(f"{STAT_DIR}/{f}") as fh:
                    datas = fh.readlines()
                for line in datas:
                    if line.split(';')[0].lower() in STATS_TOT_FIELDS:
                        key = line.split(';')[0].lower()
                        value = int(line.split(';')[1])
                        if key in self.consolided_datas:
                            datas = self.consolided_datas[key]
                            if datas[0] <= 0:
                                self.consolided_datas[key][0] = value
                            else:
                                if value > datas[1]:
                                    self.consolided_datas[key][1] = value
                        else:
                            self.consolided_datas[key] = [value,0]

                    if line.split(';')[0].lower() in STATS_AVG_FIELDS:
                        key = line.split(';')[0].lower()
                        value = int(line.split(';')[1])
                        if key in self.consolided:
                            if self.consolided[key] < int(value):
                                self.consolided[key] = int(value)
                        else:
                            self.consolided[key] = 0
                                
        for (k,v)  in self.consolided_datas.items():
            self.consolided[k] = v[1] - v[0]
            if 'byte' in k:
                octets,unit = self.__conv(self.consolided[k])
                self.consolided[k] = f"{octets} {unit}"
            elif 'seconds' in k:
                octets,unit = self.__conv(self.consolided[k],'t')
                self.consolided[k] = f"{octets} {unit}"
        return self.consolided

# Fonctions

# Principal
def runMain():
    if len(sys.argv) <= 1:
        print('Argument manquant: mois')
        sys.exit(1)

    try:
        mois = int(sys.argv[1])
    except ValueError:
        print('Le mois doit etre un nombre compris entre 1 et 12 !')
        sys.exit(1)
    
    if mois < 1 or mois > 12:
        print('Le mois doit etre un nombre compris entre 1 et 12 !')
        sys.exit(1)

    currentDate = datetime.date.today()
    if len(sys.argv) >= 3:
        year = int(sys.argv[2])
    else:
        year = currentDate.year

    stats = Stats(year,mois)
    res = stats.parse()
    for (k,v) in res.items():
        if k in STATS_TOT_FIELDS:
            chaine = STATS_FR_TOT_FIELDS[STATS_TOT_FIELDS.index(k)]
        elif k in STATS_AVG_FIELDS:
            chaine = STATS_FR_AVG_FIELDS[STATS_AVG_FIELDS.index(k)]
        print(f"{chaine} : {v}")

if __name__ == '__main__':
    runMain()        
# Fin du programme