#!/usr/bin/env python
# -*- coding: utf-8 -*-

''' (web)forms that can be used elsewhere. '''

from django import forms
from django.db import models
from django.contrib.auth.forms import UserCreationForm, UserChangeForm
from django.contrib.auth.models import User
from django.utils.translation import gettext as _

from lostplaces import widgets
from lostplaces.models import Place, PlaceImage, Voucher, Explorer

class SignupVoucherForm(UserCreationForm):
    class Meta:
        model = User
        fields = ('username', 'email', 'first_name', 'last_name')
    voucher = forms.CharField(
        max_length=30,
        help_text=_('The Voucher you got from an administrator')
    )

    def is_valid(self):
        super_result = super().is_valid()
        submitted_voucher = self.cleaned_data.get('voucher')
        try:
            fetched_voucher = Voucher.objects.get(code=submitted_voucher)
        except Voucher.DoesNotExist:
            self.add_error('voucher', _('Invalid voucher'))
            return False

        if not fetched_voucher.valid:
            self.add_error('voucher', _('Expired voucher'))
            return False

        fetched_voucher.delete()
        return super_result

class ExplorerUserChangeForm(UserChangeForm):
    class Meta:
        model = User
        fields = [ 'username', 'first_name', 'last_name', 'email' ]
    ''' Hide password hint.'''
    password = None

    ''' Display username, but display it non-editable and not required. '''
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['username'].required = False
        self.fields['username'].help_text = None
        self.fields['username'].widget.attrs['disabled'] = 'disabled'
    
    def clean_username(self):
        # As shown in the above answer.
        instance = getattr(self, 'instance', None)
        if instance:
            return instance.username
        else:
            return self.cleaned_data.get('username', None)

class ExplorerChangeForm(forms.ModelForm):
    class Meta:
        model = Explorer
        fields = '__all__'
        exclude = ['user', 'favorite_places', 'level']

class PlaceForm(forms.ModelForm):
    class Meta:
        model = Place
        fields = '__all__'
        exclude = ['submitted_by', 'level', 'mode']
        widgets = {
            'hero': widgets.SelectContent()
        }
    
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        if 'instance' in kwargs:
            self.fields['hero'].queryset = PlaceImage.objects.filter(place=kwargs['instance'])
        self.fields['hero'].widget.attrs['item_template'] = 'partials/select_place_image_item.html'
    
    latitude = forms.DecimalField(
        widget=forms.NumberInput(attrs={'min':-90,'max': 90,'type': 'number', 'step': 'any'})
    )
    
    longitude = forms.DecimalField(
        widget=forms.NumberInput(attrs={'min':-180,'max': 180,'type': 'number', 'step': 'any'})
    )

    draft = forms.BooleanField(
        label=_('Save Place as draft'),
        required=False
    )

class PlaceImageForm(forms.ModelForm):
    class Meta:
        model = PlaceImage
        fields = ['filename']
        widgets = {
            'filename': forms.ClearableFileInput(attrs={'multiple': True})
        }

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

        self.fields['filename'].required = False
        
class PlaceSetHeroForm(forms.ModelForm):
    class Meta:
        model = Place
        fields = ['hero']
        widgets = {
            'hero': widgets.SelectContent()
        }
        
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields['hero'].queryset = PlaceImage.objects.filter(place=kwargs['instance'])
        self.fields['hero'].widget.attrs['item_template'] = 'partials/select_place_image_item.html'
        
    

class TagSubmitForm(forms.Form):
    tag_list = forms.CharField(
        max_length=500,
        required=False, 
        widget=forms.TextInput(attrs={'autocomplete':'off'})
        )