# -*- coding:utf-8 -*
#
# Copyright 2016,2017
# - Skia <skia@libskia.so>
# - Sli <antoine@bartuccio.fr>
#
# Ce fichier fait partie du site de l'Association des Étudiants de l'UTBM,
# http://ae.utbm.fr.
#
# This program is free software; you can redistribute it and/or modify it under
# the terms of the GNU General Public License a published by the Free Software
# Foundation; either version 3 of the License, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
# FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
# details.
#
# You should have received a copy of the GNU General Public License along with
# this program; if not, write to the Free Sofware Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#

from django.conf import settings
from django import forms
from django.utils.translation import ugettext_lazy as _

from ajax_select.fields import AutoCompleteSelectField, AutoCompleteSelectMultipleField

from club.models import Mailing, MailingSubscription, Club, Membership

from core.models import User
from core.views.forms import SelectDate, SelectDateTime
from counter.models import Counter


class ClubEditForm(forms.ModelForm):
    class Meta:
        model = Club
        fields = ["address", "logo", "short_description"]

    def __init__(self, *args, **kwargs):
        super(ClubEditForm, self).__init__(*args, **kwargs)
        self.fields["short_description"].widget = forms.Textarea()


class MailingForm(forms.ModelForm):
    class Meta:
        model = Mailing
        fields = ("email", "club", "moderator")

    def __init__(self, *args, **kwargs):
        club_id = kwargs.pop("club_id", None)
        user_id = kwargs.pop("user_id", -1)  # Remember 0 is treated as None
        super(MailingForm, self).__init__(*args, **kwargs)
        if club_id:
            self.fields["club"].queryset = Club.objects.filter(id=club_id)
            self.fields["club"].initial = club_id
            self.fields["club"].widget = forms.HiddenInput()
        if user_id >= 0:
            self.fields["moderator"].queryset = User.objects.filter(id=user_id)
            self.fields["moderator"].initial = user_id
            self.fields["moderator"].widget = forms.HiddenInput()


class MailingSubscriptionForm(forms.ModelForm):
    class Meta:
        model = MailingSubscription
        fields = ("mailing", "user", "email")

    def __init__(self, *args, **kwargs):
        kwargs.pop("user_id", None)  # For standart interface
        club_id = kwargs.pop("club_id", None)
        super(MailingSubscriptionForm, self).__init__(*args, **kwargs)
        self.fields["email"].required = False
        if club_id:
            self.fields["mailing"].queryset = Mailing.objects.filter(
                club__id=club_id, is_moderated=True
            )

    user = AutoCompleteSelectField(
        "users", label=_("User"), help_text=None, required=False
    )


class SellingsFormBase(forms.Form):
    begin_date = forms.DateTimeField(
        ["%Y-%m-%d %H:%M:%S"],
        label=_("Begin date"),
        required=False,
        widget=SelectDateTime,
    )
    end_date = forms.DateTimeField(
        ["%Y-%m-%d %H:%M:%S"],
        label=_("End date"),
        required=False,
        widget=SelectDateTime,
    )
    counter = forms.ModelChoiceField(
        Counter.objects.order_by("name").all(), label=_("Counter"), required=False
    )


class ClubMemberForm(forms.Form):
    """
    Form handling the members of a club
    """

    error_css_class = "error"
    required_css_class = "required"

    users = AutoCompleteSelectMultipleField(
        "users",
        label=_("Users to add"),
        help_text=_("Search users to add (one or more)."),
        required=False,
    )

    def __init__(self, *args, **kwargs):
        self.club = kwargs.pop("club")
        self.request_user = kwargs.pop("request_user")
        self.club_members = kwargs.pop("club_members", None)
        if not self.club_members:
            self.club_members = (
                self.club.members.filter(end_date=None).order_by("-role").all()
            )
        self.request_user_membership = self.club.get_membership_for(self.request_user)
        super(ClubMemberForm, self).__init__(*args, **kwargs)

        # Using a ModelForm binds too much the form with the model and we don't want that
        # We want the view to process the model creation since they are multiple users
        # We also want the form to handle bulk deletion
        self.fields.update(
            forms.fields_for_model(
                Membership,
                fields=("role", "start_date", "description"),
                widgets={"start_date": SelectDate},
            )
        )

        # Role is required only if users is specified
        self.fields["role"].required = False

        # Start date and description are never really required
        self.fields["start_date"].required = False
        self.fields["description"].required = False

        self.fields["users_old"] = forms.ModelMultipleChoiceField(
            User.objects.filter(
                id__in=[
                    ms.user.id
                    for ms in self.club_members
                    if ms.can_be_edited_by(
                        self.request_user, self.request_user_membership
                    )
                ]
            ).all(),
            label=_("Mark as old"),
            required=False,
            widget=forms.CheckboxSelectMultiple,
        )
        if not self.request_user.is_root:
            self.fields.pop("start_date")

    def clean_users(self):
        """
            Check that the user is not trying to add an user already in the club
            Also check that the user is valid and has a valid subscription
        """
        cleaned_data = super(ClubMemberForm, self).clean()
        users = []
        for user_id in cleaned_data["users"]:
            user = User.objects.filter(id=user_id).first()
            if not user:
                raise forms.ValidationError(
                    _("One of the selected users doesn't exist"), code="invalid"
                )
            if not user.is_subscribed:
                raise forms.ValidationError(
                    _("User must be subscriber to take part to a club"), code="invalid"
                )
            if self.club.get_membership_for(user):
                raise forms.ValidationError(
                    _("You can not add the same user twice"), code="invalid"
                )
            users.append(user)
        return users

    def clean(self):
        """
            Check user rights for adding an user
        """
        cleaned_data = super(ClubMemberForm, self).clean()

        if "start_date" in cleaned_data and not cleaned_data["start_date"]:
            # Drop start_date if allowed to edition but not specified
            cleaned_data.pop("start_date")

        if not cleaned_data.get("users"):
            # No user to add equals no check needed
            return cleaned_data

        if cleaned_data.get("role", "") == "":
            # Role is required if users exists
            self.add_error("role", _("You should specify a role"))
            return cleaned_data

        request_user = self.request_user
        membership = self.request_user_membership
        if not (
            cleaned_data["role"] <= settings.SITH_MAXIMUM_FREE_ROLE
            or (membership is not None and membership.role >= cleaned_data["role"])
            or request_user.is_board_member
            or request_user.is_root
        ):
            raise forms.ValidationError(_("You do not have the permission to do that"))
        return cleaned_data