# Re2o un logiciel d'administration développé initiallement au rezometz. Il
# se veut agnostique au réseau considéré, de manière à être installable en
# quelques clics.
#
# Copyright © 2017  Gabriel Détraz
# Copyright © 2017  Lara Kermarec
# Copyright © 2017  Augustin Lemesle
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
"""
Forms to edit preferences: users, machines, topology, organisation etc.
"""

from __future__ import unicode_literals

from django.forms import ModelForm, Form
from django.db.models import Q
from django import forms
from django.utils.translation import ugettext_lazy as _
from re2o.mixins import FormRevMixin
from .models import (
    OptionalUser,
    OptionalMachine,
    OptionalTopologie,
    GeneralOption,
    AssoOption,
    MailMessageOption,
    HomeOption,
    Service,
    MailContact,
    Reminder,
    RadiusKey,
    SwitchManagementCred,
    RadiusOption,
    CotisationsOption,
    DocumentTemplate,
    RadiusAttribute,
    Mandate,
)
from topologie.models import Switch


class EditOptionalUserForm(ModelForm):
    """Form used to edit user preferences."""

    class Meta:
        model = OptionalUser
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(EditOptionalUserForm, self).__init__(*args, prefix=prefix, **kwargs)
        self.fields["is_tel_mandatory"].label = _("Telephone number required")
        self.fields["gpg_fingerprint"].label = _("GPG fingerprint")
        self.fields["all_can_create_club"].label = _("All can create a club")
        self.fields["all_can_create_adherent"].label = _("All can create a member")
        self.fields["shell_default"].label = _("Default shell")
        self.fields["self_change_shell"].label = _("Self change shell")
        self.fields["self_change_pseudo"].label = _("Self change pseudo")
        self.fields["self_room_policy"].label = _("Self room policy")
        self.fields["local_email_accounts_enabled"].label = _("Local email accounts enabled")
        self.fields["local_email_domain"].label = _("Local email domain")
        self.fields["max_email_address"].label = _("Max local email address")
        self.fields["delete_notyetactive"].label = _("Delete not yet active users")
        self.fields["disable_emailnotyetconfirmed"].label = _("Disabled email not yet confirmed")
        self.fields["self_adhesion"].label = _("Self registration")
        self.fields["all_users_active"].label = _("All users are state active by default")
        self.fields["allow_set_password_during_user_creation"].label = _("Allow set password during user creation")
        self.fields["allow_archived_connexion"].label = _("Allow archived connexion")


class EditOptionalMachineForm(ModelForm):
    """Form used to edit machine preferences."""

    class Meta:
        model = OptionalMachine
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(EditOptionalMachineForm, self).__init__(*args, prefix=prefix, **kwargs)
        self.fields["password_machine"].label = _(
            "Possibility to set a password per machine"
        )
        self.fields["max_lambdauser_interfaces"].label = _(
            "Maximum number of interfaces allowed for a standard user"
        )
        self.fields["max_lambdauser_aliases"].label = _(
            "Maximum number of DNS aliases allowed for a standard user"
        )
        self.fields["ipv6_mode"].label = _("IPv6 mode")
        self.fields["create_machine"].label = _("Can create a machine")


class EditOptionalTopologieForm(ModelForm):
    """Form used to edit the configuration of switches."""

    automatic_provision_switchs = forms.ModelMultipleChoiceField(
        Switch.objects.all(), required=False
    )

    class Meta:
        model = OptionalTopologie
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(EditOptionalTopologieForm, self).__init__(*args, prefix=prefix, **kwargs)

        self.initial["automatic_provision_switchs"] = Switch.objects.filter(
            automatic_provision=True
        ).order_by("interface__domain__name")

    def save(self, commit=True):
        instance = super().save(commit)
        Switch.objects.all().update(automatic_provision=False)
        self.cleaned_data["automatic_provision_switchs"].update(
            automatic_provision=True
        )
        return instance


class EditGeneralOptionForm(ModelForm):
    """Form used to edit general preferences."""

    class Meta:
        model = GeneralOption
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(EditGeneralOptionForm, self).__init__(*args, prefix=prefix, **kwargs)
        self.fields["general_message_fr"].label = _("General message in French")
        self.fields["general_message_en"].label = _("General message in English")
        self.fields["search_display_page"].label = _(
            "Number of results displayed when searching"
        )
        self.fields["pagination_number"].label = _(
            "Number of items per page, standard size (e.g. users)"
        )
        self.fields["pagination_large_number"].label = _(
            "Number of items per page, large size (e.g. machines)"
        )
        self.fields["req_expire_hrs"].label = _(
            "Time before expiration of the reset password link (in hours)"
        )
        self.fields["site_name"].label = _("Website name")
        self.fields["email_from"].label = _("Email address for automatic emailing")
        self.fields["GTU_sum_up"].label = _("Summary of the General Terms of Use")
        self.fields["GTU"].label = _("General Terms of Use")


class EditAssoOptionForm(ModelForm):
    """Form used to edit information about the organisation."""

    class Meta:
        model = AssoOption
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(EditAssoOptionForm, self).__init__(*args, prefix=prefix, **kwargs)
        self.fields["name"].label = _("Organisation name")
        self.fields["siret"].label = _("SIRET number")
        self.fields["adresse1"].label = _("Address (line 1)")
        self.fields["adresse2"].label = _("Address (line 2)")
        self.fields["contact"].label = _("Contact email address")
        self.fields["telephone"].label = _("Telephone number")
        self.fields["profile_image"].label = _("Profile image")
        self.fields["pseudo"].label = _("Usual name")
        self.fields["utilisateur_asso"].label = _(
            "Account used for editing from /admin"
        )
        self.fields["description"].label = _("Description")


class EditMailMessageOptionForm(ModelForm):
    """Form used to edit welcome email messages."""

    class Meta:
        model = MailMessageOption
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(EditMailMessageOptionForm, self).__init__(*args, prefix=prefix, **kwargs)
        self.fields["welcome_mail_fr"].label = _(
            "Message for the French welcome email"
        )
        self.fields["welcome_mail_en"].label = _(
            "Message for the English welcome email"
        )


class EditHomeOptionForm(ModelForm):
    """Form used to edit the social networks information displayed on the home
    page.
    """

    class Meta:
        model = HomeOption
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(EditHomeOptionForm, self).__init__(*args, prefix=prefix, **kwargs)
        self.fields["facebook_url"].label = _("Facebook URL")
        self.fields["twitter_url"].label = _("Twitter URL")
        self.fields["twitter_account_name"].label = _("Twitter account name")


class EditRadiusOptionForm(ModelForm):
    """Form used to edit RADIUS preferences."""

    class Meta:
        model = RadiusOption
        fields = "__all__"

    def clean(self):
        cleaned_data = super().clean()
        ignored = ("radius_general_policy", "vlan_decision_ok")
        fields = (f for f in self.fields.keys() if "vlan" not in f and f not in ignored)
        for f in fields:
            choice = cleaned_data.get(f)
            vlan = cleaned_data.get(f + "_vlan")
            if choice == RadiusOption.SET_VLAN and vlan is None:
                self.add_error(f, _("You chose to set vlan but did not set any VLAN."))
                self.add_error(f + "_vlan", _("Please, choose a VLAN."))
        return cleaned_data


class EditCotisationsOptionForm(ModelForm):
    """Form used to edit subscription preferences."""

    class Meta:
        model = CotisationsOption
        fields = "__all__"


class MandateForm(ModelForm):
    """Form used to add and edit mandates."""

    class Meta:
        model = Mandate
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(MandateForm, self).__init__(*args, prefix=prefix, **kwargs)

    def clean_start_date(self):
        date = self.cleaned_data.get("start_date")
        existing_mandates = Mandate.objects.filter(
            start_date__gte=date, end_date__lt=date
        )
        if existing_mandates:
            raise forms.ValidationError(
                _(
                    "There is already a mandate taking place at the specified start date."
                )
            )
        return date

    def clean_end_date(self):
        date = self.cleaned_data.get("end_date")
        if date is None:
            return None
        existing_mandates = Mandate.objects.filter(
            start_date__gte=date, end_date__lt=date
        )
        if existing_mandates:
            raise forms.ValidationError(
                _("There is already a mandate taking place at the specified end date.")
            )
        return date

    def clean(self):
        cleaned_data = super(MandateForm, self).clean()
        start_date, end_date = cleaned_data["start_date"], cleaned_data["end_date"]
        if end_date:
            included_mandates = Mandate.objects.filter(
                Q(start_date__gte=start_date, start_date__lt=end_date)
                | Q(end_date__gt=start_date, end_date__lte=end_date)
            )
            if included_mandates:
                raise forms.ValidationError(
                    _("The specified dates overlap with an existing mandate."),
                    code="invalid",
                )
        return cleaned_data

    def save(self, commit=True):
        """Warning, side effect : if a mandate with a null end_date
        exists, its end_date will be set to instance.start_date, no matter the
        value of commit."""
        instance = super(MandateForm, self).save(commit=False)
        if instance.end_date is None:
            try:
                previous_mandate = Mandate.objects.get(end_date__isnull=True)
                previous_mandate.end_date = instance.start_date
                previous_mandate.save()
            except Mandate.DoesNotExist:
                pass
        if commit:
            instance.save()
        return instance


class ServiceForm(ModelForm):
    """Form used to add and edit services displayed on the home page."""

    class Meta:
        model = Service
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(ServiceForm, self).__init__(*args, prefix=prefix, **kwargs)
        self.fields["name"].label = _("Name")
        self.fields["url"].label = _("URL")
        self.fields["description"].label = _("Description")
        self.fields["image"].label = _("Image")


class DelServiceForm(Form):
    """Form used to delete one or several services displayed on the home page.
    """

    services = forms.ModelMultipleChoiceField(
        queryset=Service.objects.none(),
        label=_("Current services"),
        widget=forms.CheckboxSelectMultiple,
    )

    def __init__(self, *args, **kwargs):
        instances = kwargs.pop("instances", None)
        super(DelServiceForm, self).__init__(*args, **kwargs)
        if instances:
            self.fields["services"].queryset = instances
        else:
            self.fields["services"].queryset = Service.objects.all()


class ReminderForm(FormRevMixin, ModelForm):
    """Form used to add and edit reminders."""

    class Meta:
        model = Reminder
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(ReminderForm, self).__init__(*args, prefix=prefix, **kwargs)


class RadiusKeyForm(FormRevMixin, ModelForm):
    """Form used to add and edit RADIUS keys."""

    members = forms.ModelMultipleChoiceField(
        queryset=Switch.objects.all(), required=False
    )

    class Meta:
        model = RadiusKey
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(RadiusKeyForm, self).__init__(*args, prefix=prefix, **kwargs)
        instance = kwargs.get("instance", None)
        if instance:
            self.initial["members"] = Switch.objects.filter(radius_key=instance)

    def save(self, commit=True):
        instance = super().save(commit)
        instance.switch_set = self.cleaned_data["members"]
        return instance


class SwitchManagementCredForm(FormRevMixin, ModelForm):
    """Form used to add and edit switch management credentials."""

    members = forms.ModelMultipleChoiceField(Switch.objects.all(), required=False)

    class Meta:
        model = SwitchManagementCred
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(SwitchManagementCredForm, self).__init__(*args, prefix=prefix, **kwargs)
        instance = kwargs.get("instance", None)
        if instance:
            self.initial["members"] = Switch.objects.filter(management_creds=instance)

    def save(self, commit=True):
        instance = super().save(commit)
        instance.switch_set = self.cleaned_data["members"]
        return instance


class MailContactForm(ModelForm):
    """Form used to add and edit contact email addresses."""

    class Meta:
        model = MailContact
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(MailContactForm, self).__init__(*args, prefix=prefix, **kwargs)


class DelMailContactForm(Form):
    """Form used to delete one or several contact email addresses."""

    mailcontacts = forms.ModelMultipleChoiceField(
        queryset=MailContact.objects.none(),
        label=_("Current email addresses"),
        widget=forms.CheckboxSelectMultiple,
    )

    def __init__(self, *args, **kwargs):
        instances = kwargs.pop("instances", None)
        super(DelMailContactForm, self).__init__(*args, **kwargs)
        if instances:
            self.fields["mailcontacts"].queryset = instances
        else:
            self.fields["mailcontacts"].queryset = MailContact.objects.all()


class DocumentTemplateForm(FormRevMixin, ModelForm):
    """Form used to add and edit document templates."""

    class Meta:
        model = DocumentTemplate
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(DocumentTemplateForm, self).__init__(*args, prefix=prefix, **kwargs)


class DelDocumentTemplateForm(FormRevMixin, Form):
    """Form used to delete one or several document templates."""

    document_templates = forms.ModelMultipleChoiceField(
        queryset=DocumentTemplate.objects.none(),
        label=_("Current document templates"),
        widget=forms.CheckboxSelectMultiple,
    )

    def __init__(self, *args, **kwargs):
        instances = kwargs.pop("instances", None)
        super(DelDocumentTemplateForm, self).__init__(*args, **kwargs)
        if instances:
            self.fields["document_templates"].queryset = instances
        else:
            self.fields["document_templates"].queryset = Banque.objects.all()


class RadiusAttributeForm(ModelForm):
    """Form used to add and edit RADIUS attributes."""

    class Meta:
        model = RadiusAttribute
        fields = "__all__"

    def __init__(self, *args, **kwargs):
        prefix = kwargs.pop("prefix", self.Meta.model.__name__)
        super(RadiusAttributeForm, self).__init__(*args, prefix=prefix, **kwargs)


class DelRadiusAttributeForm(Form):
    """Form used to delete one or several RADIUS attributes."""

    attributes = forms.ModelMultipleChoiceField(
        queryset=RadiusAttribute.objects.none(),
        label=_("Current attributes"),
        widget=forms.CheckboxSelectMultiple,
    )

    def __init__(self, *args, **kwargs):
        instances = kwargs.pop("instances", None)
        super(DelServiceForm, self).__init__(*args, **kwargs)
        if instances:
            self.fields["attributes"].queryset = instances
        else:
            self.fields["attributes"].queryset = Attributes.objects.all()
