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import csv, re, datetime, os, shutil
from html import unescape
from unidecode import unidecode
from pathlib import Path

from django.conf import settings

from troggle.core.models.troggle import Expedition, Person, PersonExpedition
from troggle.core.models.troggle import DataIssue
from troggle.core.utils import save_carefully, TROG

'''These functions do not match how the stand-alone folk script works. So the script produces an HTML file which has 
href links to pages in troggle which troggle does not think are right.
The standalone script needs to be renedred defucnt, and all the parsing needs to be in troggle. Either that,
or they should use the same code by importing a module.
'''

def parse_blurb(personline, header, person):
    """create mugshot Photo instance"""
    ms_filename = personline[header["Mugshot"]]
    ms_path = Path(settings.EXPOWEB, "folk", ms_filename)
    
    if ms_filename:
        if not ms_path.is_file():
            message = f"! INVALID mug_shot field '{ms_filename}' for {person.fullname}"
            print(message)
            DataIssue.objects.create(parser='people', message=message, url=f"/person/{person.fullname}")
            return
    
    if ms_filename.startswith('i/'):
        #if person just has an image, add it. It has format 'i/adama2018.jpg'
        person.mug_shot = str(Path("/folk", ms_filename))
        person.blurb = None

    elif ms_filename.startswith('l/'): 
        # it has the format 'l/ollybetts.htm' the file may contain <img src="../i/mymug.jpg"> images
        with open(ms_path,'r') as blurbfile:
            blrb = blurbfile.read()
        pblurb=re.search(r'<body>.*<hr',blrb,re.DOTALL)
        if pblurb:
            person.mug_shot = None           
            fragment= re.search('<body>(.*)<hr',blrb,re.DOTALL).group(1) 
            fragment = fragment.replace('src="../i/', 'src="/folk/i/')
            fragment = fragment.replace("src='../i/", "src='/folk/i/")
            fragment = re.sub(r'<h.*>[^<]*</h.>', '', fragment)
            # replace src="../i/ with src="/folk/i
            person.blurb = fragment
        else:
            message = f"! Blurb parse error in {ms_filename}"
            print(message)
            DataIssue.objects.create(parser='people', message=message, url="/folk/")

    elif ms_filename == '':
        pass
    else:
        message = f"! Unrecognised type of file at mug_shot field '{ms_filename}' for {person.fullname}"
        print(message)
        DataIssue.objects.create(parser='people', message=message, url="/folk/")

    person.save()

def load_people_expos():
    '''This is where the folk.csv file is parsed to read people's names. 
    Which it gets wrong for people like Lydia-Clare Leather and various 'von' and 'de' middle 'names'
    and McLean and Mclean and McAdam - interaction with the url parser in urls.py too
    '''
    DataIssue.objects.filter(parser='people').delete()
    
    persontab = open(os.path.join(settings.EXPOWEB, "folk", "folk.csv")) # should really be EXPOFOLK I guess
    personreader = csv.reader(persontab) # this is an iterator
    headers = next(personreader)
    header = dict(list(zip(headers, list(range(len(headers))))))
    
    # make expeditions
    print(" - Loading expeditions")
    years = headers[5:]
    
    for year in years:
        lookupAttribs = {'year':year}
        nonLookupAttribs = {'name':"CUCC expo %s" % year}
        
        save_carefully(Expedition, lookupAttribs, nonLookupAttribs)

    # make persons
    print(" - Loading personexpeditions")

    for personline in personreader:
        name = personline[header["Name"]]
        name = re.sub(r"<.*?>", "", name)

        firstname = ""
        nickname = ""

        rawlastname = personline[header["Lastname"]].strip()
        matchlastname = re.match(r"^([\w&;\s]+)(?:\(([^)]*)\))?", rawlastname)
        lastname = matchlastname.group(1).strip()

        splitnick = re.match(r"^([\w&;\s]+)(?:\(([^)]*)\))?", name)
        fullname = splitnick.group(1)

        nickname = splitnick.group(2) or ""

        fullname = fullname.strip()
        names = fullname.split(' ')
        firstname = names[0]
        if len(names) == 1:
            lastname = ""

        if personline[header["VfHO member"]] =='':
            vfho = False
        else:
            vfho = True

        lookupAttribs={'first_name':firstname, 'last_name':(lastname or "")}
        nonLookupAttribs={'is_vfho':vfho, 'fullname':fullname, 'nickname':nickname}
        person, created = save_carefully(Person, lookupAttribs, nonLookupAttribs)

        parse_blurb(personline=personline, header=header, person=person)
    
        # make person expedition from table
        for year, attended in list(zip(headers, personline))[5:]:
            expedition = Expedition.objects.get(year=year)
            if attended == "1" or attended == "-1":
                lookupAttribs = {'person':person, 'expedition':expedition}
                nonLookupAttribs = {'nickname':nickname, 'is_guest':(personline[header["Guest"]] == "1")}
                save_carefully(PersonExpedition, lookupAttribs, nonLookupAttribs)
    print("", flush=True)

def who_is_this(year,possibleid):
    expo = Expedition.objects.filter(year=year)
    personexpedition =  GetPersonExpeditionNameLookup(expo)[possibleid.lower()]
    if personexpedition:
        return personexpedition.person
    else:
        return None
        
def known_foreigner(id):
    '''If this someone from ARGE or a known Austrian? Name has to be exact, no soft matching
    '''
    friends = ["P. Jeutter", "K. Jäger", "S. Steinberger", "R. Seebacher", 
        "Dominik Jauch", "Fritz Mammel", "Marcus Scheuerman", 
        "Uli Schütz", "Wieland Scheuerle",
        "Kai Schwekend", "Regina Kaiser", "Thilo Müller","Wieland Scheuerle",
        "Florian Gruner", "Helmut Stopka-Ebeler", "Aiko", "Mark Morgan"]

    if id in friends:
        return True
    else:
        return False

    
# Refactor. The dict GetPersonExpeditionNameLookup(expo) indexes by name and has values of personexpedition
# This is convoluted, the whole personexpedition concept is unnecessary?

Gpersonexpeditionnamelookup = { }
def GetPersonExpeditionNameLookup(expedition):
    global Gpersonexpeditionnamelookup
    
    def apply_variations(f, l):
        '''Be generous in guessing possible matches. Any duplicates will be ruled as invalid.
        '''
        f = f.lower()
        l = l.lower()
        variations = []
        variations.append(f)
        variations.append(l)
        variations.append(f + l)
        variations.append(f + " " + l)
        variations.append(f + " " + l[0])
        variations.append(f + l[0])
        variations.append(f + " " +l[0] + '.')
        variations.append(f[0] + " " + l)
        variations.append(f[0] + ". " + l)
        variations.append(f[0] + l)
        variations.append(f[0] + l[0]) # initials e.g. gb or bl
        return variations
    
    res = Gpersonexpeditionnamelookup.get(expedition.name)
    
    if res:
        return res
    
    res = { }
    duplicates = set()
    
    #print("Calculating GetPersonExpeditionNameLookup for " + expedition.year)
    personexpeditions = PersonExpedition.objects.filter(expedition=expedition)
    short = {}
    dellist = []
    for personexpedition in personexpeditions:
        possnames = [ ]
        f = unidecode(unescape(personexpedition.person.first_name.lower()))
        l = unidecode(unescape(personexpedition.person.last_name.lower()))
        full = unidecode(unescape(personexpedition.person.fullname.lower()))
        n = unidecode(unescape(personexpedition.nickname.lower()))
        if full not in possnames:
            possnames.append(full)
        if n not in possnames:
            possnames.append(n)
        
        if l:
            possnames += apply_variations(f,l)

            if n:
                possnames += apply_variations(n, l)
                
            if f == "Robert".lower():
                possnames += apply_variations("Bob", l)
            if f == "Rob".lower():
                possnames += apply_variations("Robert", l)
                
            if f == "Andrew".lower():
                possnames += apply_variations("Andy", l)
            if f == "Andy".lower():
                possnames += apply_variations("Andrew", l)
            if f == "Michael".lower():
                possnames += apply_variations("Mike", l)
                
            if f == "David".lower():
                possnames += apply_variations("Dave", l)
            if f == "Dave".lower():
                possnames += apply_variations("David", l)
                
            if f == "Peter".lower():
                possnames += apply_variations("Pete", l)
            if f == "Pete".lower():
                possnames += apply_variations("Peter", l)
                
            if f == "Olly".lower():
                possnames += apply_variations("Oliver", l)
            if f == "Oliver".lower():
                possnames += apply_variations("Olly", l)
               
            if f == "Ollie".lower():
                possnames += apply_variations("Oliver", l)
            if f == "Oliver".lower():
                possnames += apply_variations("Ollie", l)

            if f == "Becka".lower():
                possnames += apply_variations("Rebecca", l)
         
            if f'{f} {l}' == "Andy Waddington".lower():
                possnames += apply_variations("aer", "waddington")
            if f'{f} {l}' == "Phil Underwood".lower():
                possnames += apply_variations("phil", "underpants")
            if f'{f} {l}' == "Naomi Griffiths".lower():
                possnames += apply_variations("naomi", "makins")
            if f'{f} {l}' == "Tina White".lower():
                possnames += apply_variations("tina", "richardson")
            if f'{f} {l}' == "Cat Hulse".lower():
                possnames += apply_variations("catherine", "hulse")
                possnames += apply_variations("cat", "henry")
            if f'{f} {l}' == "Jess Stirrups".lower():
                possnames += apply_variations("jessica", "stirrups")
            if f'{f} {l}' == "Nat Dalton".lower():
                possnames += apply_variations("nathanael", "dalton") # correct. He has a weird spelling.
            if f'{f} {l}' == "Mike Richardson".lower():
                possnames.append("mta")
                possnames.append("miketa")
                possnames.append("mike the animal")
                possnames.append("animal")
            if f'{f} {l}' == "Eric Landgraf".lower():
                possnames.append("eric c.landgraf")
                possnames.append("eric c. landgraf")
                possnames.append("eric c landgraf")
            if f'{f} {l}' == "Nadia Raeburn".lower():
                possnames.append("nadia rc")
                possnames.append("nadia raeburn-cherradi")
             
        for i in [3, 4, 5, 6]:
            lim = min(i, len(f)+1)  # short form, e.g. Dan for Daniel. 
            if f[:lim] not in short:
                short[f[:lim]]= personexpedition 
            else:
                dellist.append(f[:lim])
 
        possnames = set(possnames) # remove duplicates
        for possname in possnames:
            if possname in res:
                duplicates.add(possname)
            else:
                res[possname] = personexpedition
        
    for possname in duplicates:
        del res[possname]
        
    for possname in dellist:
        if possname in short: #always true ?
            del short[possname]
    for shortname in short:
        res[shortname] = short[shortname]
        
    
    Gpersonexpeditionnamelookup[expedition.name] = res
    return res