from django.utils import timezone
from pprint import pprint, pformat
import pydash as _; _.map = _.map_; _.filter = _.filter_
import random


def take(coll, n):
    chunk = coll[0:n]
    del coll[0:n]
    return chunk


def take_random(coll, n):
    if n == 0:
        return []
    
    chunk = _.sample(coll, n)
    
    for item in chunk:
        coll.remove(item)
    
    return chunk


def take_one_random(coll):
    if len(coll) == 0:
        return None
    
    return coll.pop(_.random(0, len(coll)-1))


def random_phone():
    return '+7' + str(_.sample((917, 964, 965, 987, 912, 935))) + str(_.random(1000000, 9999999))


def random_date():
    return timezone.datetime(_.random(2012, 2018), _.random(1, 12), _.random(1, 28))


def random_amount():
    return random.random() * random.choice((100, 1000, 10000))


def model_fields(model, width=200):
    pprint([(
        f.name,
        'Relation? %s' % f.is_relation,
        'Null? %s' % f.null,
        'Blank? %s' % f.blank if not f.is_relation else '(relation)',
        'Hidden? %s' % (f.is_hidden() if hasattr(f, 'is_hidden') else False),
    ) for f in model._meta.get_fields(include_hidden=True)], width=width)