"""Формы портала для аптек и сервисов/поставщиков."""
from __future__ import annotations

from django import forms
from django.utils.translation import gettext_lazy as _

from core.models import Directory
from .models import Location, Pharmacy


class HierarchicalRegionChoiceField(forms.ModelChoiceField):
    """Регион с отступами по иерархии (как в админке)."""

    def __init__(self, *args, **kwargs):
        queryset = kwargs.get('queryset') or Directory.objects.filter(
            directory_type__code__in=['region', 'district', 'city', 'city_district'],
            is_active=True,
        ).select_related('directory_type').order_by('_path')
        kwargs['queryset'] = queryset
        kwargs.setdefault('required', True)
        super().__init__(*args, **kwargs)

    def label_from_instance(self, obj):
        depth = (getattr(obj, '_path', '') or '').count('.')
        indent = '\u00A0\u00A0' * depth + ('└ ' if depth else '')
        return f'{indent}{obj.name}'


class PortalPharmacyEditForm(forms.ModelForm):
    """Редактирование реквизитов аптеки в портале."""

    location_region = HierarchicalRegionChoiceField(
        label=_('Город/район'),
        empty_label=_('— Выберите регион —'),
    )

    class Meta:
        model = Pharmacy
        fields = (
            'organization', 'pharmacy_number', 'status', 'category', 'vat_category',
            'working_hours', 'location_region',
            'street', 'house_number', 'building', 'apartment', 'location',
            'phone', 'license_number', 'license_expiry_date',
            'head_pharmacist', 'responsible_manager', 'curator', 'pharmacists_count',
            'comments',
        )
        widgets = {
            'working_hours': forms.TextInput(attrs={'class': 'input', 'placeholder': '08:00-20:00'}),
            'street': forms.TextInput(attrs={'class': 'input'}),
            'house_number': forms.TextInput(attrs={'class': 'input'}),
            'building': forms.TextInput(attrs={'class': 'input'}),
            'apartment': forms.TextInput(attrs={'class': 'input'}),
            'phone': forms.TextInput(attrs={'class': 'input', 'placeholder': '+380...'}),
            'license_number': forms.TextInput(attrs={'class': 'input'}),
            'license_expiry_date': forms.DateInput(attrs={'class': 'input', 'type': 'date'}),
            'pharmacists_count': forms.NumberInput(attrs={'class': 'input', 'min': 1}),
            'comments': forms.Textarea(attrs={'class': 'input', 'rows': 3}),
            'location': forms.TextInput(attrs={
                'class': 'input',
                'placeholder': '46.4825,30.7233',
            }),
            'pharmacy_number': forms.NumberInput(attrs={'class': 'input', 'min': 1}),
            'organization': forms.Select(attrs={'class': 'input'}),
            'status': forms.Select(attrs={'class': 'input'}),
            'category': forms.Select(attrs={'class': 'input'}),
            'vat_category': forms.Select(attrs={'class': 'input'}),
            'head_pharmacist': forms.Select(attrs={'class': 'input'}),
            'responsible_manager': forms.Select(attrs={'class': 'input'}),
            'curator': forms.Select(attrs={'class': 'input'}),
        }

    def __init__(self, *args, user=None, **kwargs):
        super().__init__(*args, **kwargs)
        from apps.employees.models import Employee

        self.fields['organization'].queryset = Directory.objects.filter(
            directory_type__code='organization', is_active=True,
        ).order_by('name')
        self.fields['organization'].widget.attrs['class'] = 'input'
        self.fields['location_region'].widget.attrs['class'] = 'input'

        active = Employee.objects.filter(is_active=True).select_related('post').order_by(
            'last_name', 'first_name',
        )
        self.fields['head_pharmacist'].queryset = active
        self.fields['responsible_manager'].queryset = active
        self.fields['curator'].queryset = active
        for name in ('head_pharmacist', 'responsible_manager', 'curator'):
            self.fields[name].required = False
            self.fields[name].empty_label = '—'

        self.fields['category'].required = False
        self.fields['vat_category'].required = False
        self.fields['license_number'].required = False
        self.fields['license_expiry_date'].required = False
        self.fields['phone'].required = False
        self.fields['comments'].required = False
        self.fields['building'].required = False
        self.fields['apartment'].required = False
        self.fields['location'].required = False

        if user is not None and not user.has_perm('locations.manage_location_access'):
            for field in ('head_pharmacist', 'responsible_manager', 'curator'):
                self.fields.pop(field, None)


class PortalVendorForm(forms.ModelForm):
    """Создание/редактирование сервиса или поставщика (location_type=vendor)."""

    location_region = HierarchicalRegionChoiceField(
        label=_('Город/район'),
        empty_label=_('— Выберите регион —'),
        required=True,
    )

    class Meta:
        model = Location
        fields = (
            'name', 'location_region',
            'street', 'house_number', 'building', 'apartment',
            'location', 'comments', 'is_active',
        )
        widgets = {
            'name': forms.TextInput(attrs={
                'class': 'input',
                'placeholder': 'Вайтер Юг',
                'required': True,
            }),
            'street': forms.TextInput(attrs={'class': 'input'}),
            'house_number': forms.TextInput(attrs={'class': 'input'}),
            'building': forms.TextInput(attrs={'class': 'input'}),
            'apartment': forms.TextInput(attrs={'class': 'input'}),
            'location': forms.TextInput(attrs={
                'class': 'input',
                'placeholder': '46.4825,30.7233',
            }),
            'comments': forms.Textarea(attrs={'class': 'input', 'rows': 2}),
            'is_active': forms.CheckboxInput(),
        }

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['name'].required = True
        self.fields['location_region'].widget.attrs['class'] = 'input'
        for optional in ('street', 'house_number', 'building', 'apartment', 'comments', 'location'):
            self.fields[optional].required = False

    def clean_name(self):
        name = (self.cleaned_data.get('name') or '').strip()
        if not name:
            raise forms.ValidationError(_('Укажите название.'))
        qs = Location.objects.filter(location_type='vendor', name__iexact=name)
        if self.instance and self.instance.pk:
            qs = qs.exclude(pk=self.instance.pk)
        if qs.exists():
            raise forms.ValidationError(_('Такой сервис/поставщик уже есть.'))
        return name

    def save(self, commit=True):
        obj = super().save(commit=False)
        obj.location_type = 'vendor'
        obj.name = (obj.name or '').strip()
        if commit:
            obj.save()
        return obj