import string
import os
import datetime
import logging
import re
import resource
from subprocess import call

from urllib.parse import urljoin
from decimal import Decimal, getcontext
getcontext().prec=2 #use 2 significant figures for decimal calculations

import settings

from django.db import models
from django.contrib import admin
from django.contrib.auth.models import User
from django.contrib.contenttypes.models import ContentType
from django.conf import settings

from django.urls import reverse
from django.template import Context, loader

#import troggle.core.models_survex 

'''This file declares TROG a globally visible object for caches.

TROG is a dictionary holding gloablly visible indexes and cache functions.
It is a Global Object, see https://python-patterns.guide/python/module-globals/
troggle.models.TROG

chaosmonkey(n) - used by survex import to regenerate some .3d files
save_carefully() - core function that saves troggle objects in the database

'''

TROG = {
    'pagecache' : {
        'expedition' : {}
    }
}

# This is module-level executable. This is a Bad Thing.
try:
      logging.basicConfig(level=logging.DEBUG,
                           filename=settings.LOGFILE,
                           filemode='w')
except:
# Opening of file for writing is going to fail currently, so decide it doesn't matter for now    
      pass

def get_process_memory():
    usage=resource.getrusage(resource.RUSAGE_SELF)
    return usage[2]/1024.0 

def chaosmonkey(n):
    # returns True once every n calls - randomly
    if random.randrange(0,n) != 0:
        return False
    # print("CHAOS strikes !", file=sys.stderr)
    return True

# def get_related_by_wikilinks(wiki_text):
    # found=re.findall(settings.QM_PATTERN,wiki_text)
    # res=[]
    # for wikilink in found:
        # qmdict={'urlroot':settings.URL_ROOT,'cave':wikilink[2],'year':wikilink[1],'number':wikilink[3]}
        # try:
            # cave_slugs = models_caves.CaveSlug.objects.filter(cave__kataster_number = qmdict['cave'])
            # qm=QM.objects.get(found_by__cave_slug__in = cave_slugs,
                              # found_by__date__year = qmdict['year'],
                              # number = qmdict['number'])
            # res.append(qm)         
        # except QM.DoesNotExist:
            # print(('fail on '+str(wikilink)))
    
    # return res