#
# 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 Software Foundation, Inc., 59 Temple
# Place - Suite 330, Boston, MA 02111-1307, USA.
#
#
import re
from io import BytesIO

from ajax_select import make_ajax_field
from ajax_select.fields import AutoCompleteSelectField
from captcha.fields import CaptchaField
from django import forms
from django.conf import settings
from django.contrib.auth.forms import AuthenticationForm, UserCreationForm
from django.contrib.staticfiles.storage import staticfiles_storage
from django.core.exceptions import ValidationError
from django.db import transaction
from django.forms import (
    CheckboxSelectMultiple,
    DateInput,
    DateTimeInput,
    SelectMultiple,
    Textarea,
    TextInput,
)
from django.forms.widgets import Select
from django.utils.translation import gettext
from django.utils.translation import gettext_lazy as _
from phonenumber_field.widgets import RegionalPhoneNumberWidget
from PIL import Image

from antispam.forms import AntiSpamEmailField
from core.models import Gift, Page, SithFile, User
from core.utils import resize_image

# Widgets


class SelectDateTime(DateTimeInput):
    def __init__(self, attrs=None, format=None):  # noqa A002
        default = {"type": "datetime-local"}
        attrs = default if attrs is None else default | attrs
        super().__init__(attrs=attrs, format=format or "%Y-%m-%d %H:%M")


class SelectDate(DateInput):
    def __init__(self, attrs=None, format=None):  # noqa A002
        default = {"type": "date"}
        attrs = default if attrs is None else default | attrs
        super().__init__(attrs=attrs, format=format or "%Y-%m-%d")


class MarkdownInput(Textarea):
    template_name = "core/widgets/markdown_textarea.jinja"

    def get_context(self, name, value, attrs):
        context = super().get_context(name, value, attrs)

        context["statics"] = {
            "js": staticfiles_storage.url("webpack/core/components/easymde-index.ts"),
            "css": staticfiles_storage.url("webpack/core/components/easymde-index.css"),
        }
        return context


class AutoCompleteSelectMixin:
    component_name = "autocomplete-select"
    template_name = "core/widgets/autocomplete_select.jinja"
    is_ajax = False

    def optgroups(self, name, value, attrs=None):
        """Don't create option groups when doing ajax"""
        if self.is_ajax:
            return []
        return super().optgroups(name, value, attrs=attrs)

    def get_context(self, name, value, attrs):
        context = super().get_context(name, value, attrs)
        context["component"] = self.component_name
        context["statics"] = {
            "js": staticfiles_storage.url(
                "webpack/core/components/ajax-select-index.ts"
            ),
            "csss": [
                staticfiles_storage.url(
                    "webpack/core/components/ajax-select-index.css"
                ),
                staticfiles_storage.url("core/components/ajax-select.scss"),
            ],
        }
        return context


class AutoCompleteSelect(AutoCompleteSelectMixin, Select): ...


class AutoCompleteSelectMultiple(AutoCompleteSelectMixin, SelectMultiple): ...


class AutoCompleteSelectUser(AutoCompleteSelectMixin, Select):
    component_name = "user-ajax-select"
    is_ajax = True


class AutoCompleteSelectMultipleUser(AutoCompleteSelectMixin, SelectMultiple):
    component_name = "user-ajax-select"
    is_ajax = True


class NFCTextInput(TextInput):
    template_name = "core/widgets/nfc.jinja"

    def get_context(self, name, value, attrs):
        context = super().get_context(name, value, attrs)
        context["translations"] = {"unsupported": _("Unsupported NFC card")}
        return context


class SelectFile(TextInput):
    def render(self, name, value, attrs=None, renderer=None):
        if attrs:
            attrs["class"] = "select_file"
        else:
            attrs = {"class": "select_file"}
        output = (
            '%(content)s<div name="%(name)s" class="choose_file_widget" title="%(title)s"></div>'
            % {
                "content": super().render(name, value, attrs, renderer),
                "title": _("Choose file"),
                "name": name,
            }
        )
        output += (
            '<span name="'
            + name
            + '" class="choose_file_button">'
            + gettext("Choose file")
            + "</span>"
        )
        return output


class SelectUser(TextInput):
    def render(self, name, value, attrs=None, renderer=None):
        if attrs:
            attrs["class"] = "select_user"
        else:
            attrs = {"class": "select_user"}
        output = (
            '%(content)s<div name="%(name)s" class="choose_user_widget" title="%(title)s"></div>'
            % {
                "content": super().render(name, value, attrs, renderer),
                "title": _("Choose user"),
                "name": name,
            }
        )
        output += (
            '<span name="'
            + name
            + '" class="choose_user_button">'
            + gettext("Choose user")
            + "</span>"
        )
        return output


# Forms


class LoginForm(AuthenticationForm):
    def __init__(self, *arg, **kwargs):
        if "data" in kwargs:
            from counter.models import Customer

            data = kwargs["data"].copy()
            account_code = re.compile(r"^[0-9]+[A-Za-z]$")
            try:
                if account_code.match(data["username"]):
                    user = (
                        Customer.objects.filter(account_id__iexact=data["username"])
                        .first()
                        .user
                    )
                elif "@" in data["username"]:
                    user = User.objects.filter(email__iexact=data["username"]).first()
                else:
                    user = User.objects.filter(username=data["username"]).first()
                data["username"] = user.username
            except:  # noqa E722 I don't know what error is supposed to be raised here
                pass
            kwargs["data"] = data
        super().__init__(*arg, **kwargs)
        self.fields["username"].label = _("Username, email, or account number")


class RegisteringForm(UserCreationForm):
    error_css_class = "error"
    required_css_class = "required"
    captcha = CaptchaField()

    class Meta:
        model = User
        fields = ("first_name", "last_name", "email")
        field_classes = {
            "email": AntiSpamEmailField,
        }


class UserProfileForm(forms.ModelForm):
    """Form handling the user profile, managing the files"""

    class Meta:
        model = User
        fields = [
            "first_name",
            "last_name",
            "nick_name",
            "email",
            "date_of_birth",
            "profile_pict",
            "avatar_pict",
            "scrub_pict",
            "sex",
            "pronouns",
            "second_email",
            "address",
            "parent_address",
            "phone",
            "parent_phone",
            "tshirt_size",
            "role",
            "department",
            "dpt_option",
            "semester",
            "quote",
            "school",
            "promo",
            "forum_signature",
            "is_subscriber_viewable",
        ]
        widgets = {
            "date_of_birth": SelectDate,
            "phone": RegionalPhoneNumberWidget,
            "parent_phone": RegionalPhoneNumberWidget,
            "quote": forms.Textarea,
        }

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # Image fields are injected here to override the file field provided by the model
        # This would be better if we could have a SithImage sort of model input instead of a generic SithFile
        self.fields["profile_pict"] = forms.ImageField(
            required=False,
            label=_(
                "Profile: you need to be visible on the picture, in order to be recognized (e.g. by the barmen)"
            ),
        )
        self.fields["avatar_pict"] = forms.ImageField(
            required=False,
            label=_("Avatar: used on the forum"),
        )
        self.fields["scrub_pict"] = forms.ImageField(
            required=False,
            label=_("Scrub: let other know how your scrub looks like!"),
        )

    def process(self, files):
        avatar = self.instance.avatar_pict
        profile = self.instance.profile_pict
        scrub = self.instance.scrub_pict
        self.full_clean()
        self.cleaned_data["avatar_pict"] = avatar
        self.cleaned_data["profile_pict"] = profile
        self.cleaned_data["scrub_pict"] = scrub
        parent = SithFile.objects.filter(parent=None, name="profiles").first()
        for field, f in files:
            with transaction.atomic():
                try:
                    im = Image.open(BytesIO(f.read()))
                    new_file = SithFile(
                        parent=parent,
                        name=f"{field.removesuffix('_pict')}_{self.instance.id}.webp",
                        file=resize_image(im, 400, "webp"),
                        owner=self.instance,
                        is_folder=False,
                        mime_type="image/wepb",
                        size=f.size,
                        moderator=self.instance,
                        is_moderated=True,
                    )
                    new_file.file.name = new_file.name
                    old = SithFile.objects.filter(
                        parent=parent, name=new_file.name
                    ).first()
                    if old:
                        old.delete()
                    new_file.clean()
                    new_file.save()
                    self.cleaned_data[field] = new_file
                    self._errors.pop(field, None)
                except ValidationError as e:
                    self._errors.pop(field, None)
                    self.add_error(
                        field,
                        _("Error uploading file %(file_name)s: %(msg)s")
                        % {"file_name": f, "msg": str(e.message)},
                    )
                except IOError:
                    self._errors.pop(field, None)
                    self.add_error(
                        field,
                        _("Error uploading file %(file_name)s: %(msg)s")
                        % {
                            "file_name": f,
                            "msg": _(
                                "Bad image format, only jpeg, png, webp and gif are accepted"
                            ),
                        },
                    )
        self._post_clean()


class UserPropForm(forms.ModelForm):
    error_css_class = "error"
    required_css_class = "required"

    class Meta:
        model = User
        fields = ["groups"]
        help_texts = {"groups": "Which groups this user belongs to"}
        widgets = {"groups": CheckboxSelectMultiple}


class UserGodfathersForm(forms.Form):
    type = forms.ChoiceField(
        choices=[
            ("godfather", _("Godfather / Godmother")),
            ("godchild", _("Godchild")),
        ],
        label=_("Add"),
    )
    user = AutoCompleteSelectField(
        "users", required=True, label=_("Select user"), help_text=""
    )

    def __init__(self, *args, user: User, **kwargs):
        super().__init__(*args, **kwargs)
        self.target_user = user

    def clean_user(self):
        other_user = self.cleaned_data.get("user")
        if not other_user:
            raise ValidationError(_("This user does not exist"))
        if other_user == self.target_user:
            raise ValidationError(_("You cannot be related to yourself"))
        return other_user

    def clean(self):
        super().clean()
        if not self.is_valid():
            return self.cleaned_data
        other_user = self.cleaned_data["user"]
        if self.cleaned_data["type"] == "godfather":
            if self.target_user.godfathers.contains(other_user):
                self.add_error(
                    "user",
                    _("%s is already your godfather") % (other_user.get_short_name()),
                )
        else:
            if self.target_user.godchildren.contains(other_user):
                self.add_error(
                    "user",
                    _("%s is already your godchild") % (other_user.get_short_name()),
                )
        return self.cleaned_data


class PagePropForm(forms.ModelForm):
    error_css_class = "error"
    required_css_class = "required"

    class Meta:
        model = Page
        fields = ["parent", "name", "owner_group", "edit_groups", "view_groups"]

    edit_groups = make_ajax_field(
        Page, "edit_groups", "groups", help_text="", label=_("edit groups")
    )
    view_groups = make_ajax_field(
        Page, "view_groups", "groups", help_text="", label=_("view groups")
    )

    def __init__(self, *arg, **kwargs):
        super().__init__(*arg, **kwargs)
        self.fields["edit_groups"].required = False
        self.fields["view_groups"].required = False


class PageForm(forms.ModelForm):
    class Meta:
        model = Page
        fields = ["parent", "name", "owner_group", "edit_groups", "view_groups"]

    edit_groups = make_ajax_field(
        Page, "edit_groups", "groups", help_text="", label=_("edit groups")
    )
    view_groups = make_ajax_field(
        Page, "view_groups", "groups", help_text="", label=_("view groups")
    )

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields["parent"].queryset = (
            self.fields["parent"]
            .queryset.exclude(name=settings.SITH_CLUB_ROOT_PAGE)
            .filter(club=None)
        )


class GiftForm(forms.ModelForm):
    class Meta:
        model = Gift
        fields = ["label", "user"]

    label = forms.ChoiceField(choices=settings.SITH_GIFT_LIST)

    def __init__(self, *args, **kwargs):
        user_id = kwargs.pop("user_id", None)
        super().__init__(*args, **kwargs)
        if user_id:
            self.fields["user"].queryset = self.fields["user"].queryset.filter(
                id=user_id
            )
            self.fields["user"].widget = forms.HiddenInput()