import_nk15.py

#!/usr/env/bin python3

from django.core.management.base import BaseCommand
from django.core.management import call_command
from django.utils import timezone
import psycopg2 as  pg
import psycopg2.extras as pge
from django.db import transaction

import collections
from datetime import timedelta

from django.core.exceptions import ValidationError
from django.utils.timezone import make_aware

from django.db import IntegrityError
from django.contrib.auth.models import User
from note.models import Note, NoteSpecial, NoteUser, NoteClub
from note.models import Alias
from note.models import Transaction, TransactionTemplate,\
    TemplateCategory, TemplateTransaction, MembershipTransaction
from member.models import Profile, Club, Membership

"""
Script d'import de la nk15:
TODO: import transactions
TODO: import adhesion
TODO: import activite
TODO: import ...

"""
M_DURATION = timedelta(days=396)
M_START = timedelta(days=213)
M_END = timedelta(days=273)

@transaction.atomic
def import_special(cur):
    cur.execute("SELECT * FROM comptes WHERE idbde <0 ORDER BY idbde;")
    map_idbde = dict()
    for row in cur:
        obj,created = NoteSpecial.objects.get_or_create(special_type = row["pseudo"],
                                                        balance = row["solde"],
                                                        is_active =True)
        if created:
            obj.save()
            map_idbde[row["idbde"]] = obj.pk

    cur.execute("SELECT * FROM comptes WHERE idbde=0;")
    res = cur.fetchone()
    clubBde, c = Club.objects.get_or_create(pk = 1,
                                            name = "Bde",
                                            email = "bureau.bde@lists.crans.org",
                                            membership_duration = M_DURATION,
                                            membership_start = M_START,
                                            membership_end = M_END,
                                            membership_fee = 5,
    )
    clubKfet, c = Club.objects.get_or_create(pk = 2,
                                             name = "Kfet",
                                             email = "tresorerie.bde@lists.crans.org",
                                             membership_duration = M_DURATION,
                                             membership_start = M_START,
                                             membership_end = M_END,
                                             membership_fee = 35,
    )
    clubBde.save()
    clubKfet.save()
    clubBde.note.solde=res["solde"]
    map_idbde[0] = clubKfet.note.pk
    return map_idbde


@transaction.atomic
def import_comptes(cur,map_idbde):
    cur.execute("SELECT * FROM comptes WHERE idbde > 0 ORDER BY idbde;")
    pkclub = 3
    for row in cur:
        if row["type"] == "personne":
            #sanitize password
            if row["passwd"] != "*|*":
                passwd_nk15 = "$".join(["custom_nk15","1",row["passwd"]])
            else:
                passwd_nk15 = ''
            try:
                obj_dict = {
                    "username": row["pseudo"],
                    "password": passwd_nk15,
                    "first_name": row["nom"],
                    "last_name": row["prenom"],
                    "email":  row["mail"],
                    "is_active" : False, # temporary
                }
                user = User.objects.create(**obj_dict)
               #sanitize duplicate aliases (nk12)
            except ValidationError as e:
                if e.code == 'same_alias':
                    obj_dict["username"] = row["pseudo"]+str(row["idbde"])
                    user = User.objects.create(**obj_dict)
                else:
                    raise(e)
            # profile  and note created via signal.
            profile = user.profile
            profile.phone_number = row["tel"]
            profile.address = row["adresse"]
            profile.paid = row["normalien"]
            
            note = user.note
            date = row.get("last_negatif",None)
            if date != None:
                note.last_negative = make_aware(date)
            note.balance = row["solde"]
            obj_list =[user, profile, note]
        else: # club
            obj_dict = {
                "pk":pkclub,
                "name": row["pseudo"],
                "email": row["mail"],
                "membership_duration": M_DURATION,
                "membership_start": M_START,
                "membership_end": M_END,
                "membership_fee": 0,
            }
            club,c = Club.objects.get_or_create(**obj_dict)
            pkclub +=1
            note = club.note
            note.balance = row["solde"]
            obj_list = [club,note]
        for obj in obj_list:
            obj.save()
        map_idbde[row["idbde"]] = note.pk
    return map_idbde


@transaction.atomic
def import_boutons(cur,map_idbde):
    cur.execute("SELECT * FROM boutons;")
    for row in cur:
        cat, created = TemplateCategory.objects.get_or_create(name=row["categorie"])
        obj_dict = {
            "pk": row["id"],
            "name": row["label"],
            "amount": row["montant"],
            "destination_id": map_idbde[row["destinataire"]],
            "category": cat,
            "display" : row["affiche"],
            "description": row["description"],
        }
        try:
            with transaction.atomic(): # required for error management
                button = TransactionTemplate.objects.create(**obj_dict)
        except IntegrityError as e:
            if "unique" in e.args[0]:
                qs = Club.objects.filter(note__id=map_idbde[row["destinataire"]]).values('name')
                note_name = qs[0]["name"]
                obj_dict["name"] = ' '.join([obj_dict["name"],note_name])
                button = TransactionTemplate.objects.create(**obj_dict)
            else:
                raise(e)
        if created:
            cat.save()
        button.save()


@transaction.atomic
def import_transaction(cur, map_idbde):
    cur.execute("SELECT * FROM transactions LEFT JOIN adhesions ON transactions.id = adhesions.idtransaction ORDER BY -id;")
    for row in cur:
        obj_dict = {
#            "pk": row["id"],
            "destination_id" : map_idbde[row["destinataire"]],
            "source_id": map_idbde[row["emetteur"]],
            "created_at":make_aware(row["date"]),
            "amount":row["montant"],
            "quantity":row["quantite"],
            "reason":row["description"],
            "valid":row["valide"],
        }
        if row["type"] == "bouton":
            cat_name = row["categorie"]
            if cat_name == None:
                cat_name = 'None'
            cat, created = TemplateCategory.objects.get_or_create(name=cat_name)
            if created:
                cat.save()
            obj_dict["category"] = cat
            transac = TemplateTransaction.objects.create(**obj_dict)
            transac.save()
        elif row["type"] == "adhésion":
            print("adhesion not supported yet")
        else:
           print("other type not supported yet")
            
       
@transaction.atomic
def import_aliases(cur,map_idbde):
    cur.execute("SELECT * FROM aliases ORDER by id")
    for row in cur:
        alias_name = row["alias"]
        alias_name_good = (alias_name[:252]+'...') if len(alias_name) > 255 else alias_name
        obj_dict = {
            "note_id":map_idbde[row["idbde"]],
            "name":alias_name_good,
        }
        try:
            with transaction.atomic():
                alias =  Alias.objects.create(**obj_dict)
        except IntegrityError as e:
            if "unique" in e.args[0]:
                continue
            else:
                raise(e)
        alias.save()


class Command(BaseCommand):
    """
    Command for importing the database of NK15.
    Need to be run by a user with a registered role in postgres for the database nk15. 
    """
    def print_success(self,to_print):
        return self.stdout.write(self.style.SUCCESS(to_print))
    
    def add_arguments(self,parser):
        parser.add_argument('-s', '--special', action = 'store_true', help="create Minimum instance (special note and clubs)")
        parser.add_argument('-c', '--comptes', action = 'store_true', help="import accounts")
        parser.add_argument('-b', '--boutons', action = 'store_true', help="import boutons")
        parser.add_argument('-t', '--transactions', action = 'store_true',help="import transaction")
        parser.add_argument('-a', '--aliases', action = 'store_true',help="import aliases")
        
    def handle(self, *args, **kwargs):
        #reset database.
        call_command("flush")
        self.print_success("flush  nk20 database")
        # connecting to nk15 database
        conn = pg.connect(database="nk15",user="nk15_user")
        cur = conn.cursor(cursor_factory = pge.DictCursor)

        if kwargs["special"]:
            map_idbde = import_special(cur)
            self.print_success("Minimal setup created")

        if kwargs["comptes"]:
            map_idbde = import_comptes(cur,map_idbde)
            self.print_success("comptes table imported")

        if kwargs["boutons"]:
            import_boutons(cur,map_idbde)
            self.print_success("boutons table imported")
        if kwargs["transactions"]:
            import_transaction(cur,map_idbde)
            self.print_success("transaction imported")
        if kwargs["aliases"]:
            import_aliases(cur,map_idbde)
            self.print_success("aliases imported")