from django import forms
from django.contrib.auth import get_user_model
from django.contrib.auth.forms import (
    AuthenticationForm,
    PasswordResetForm,
    SetPasswordForm,
    UserCreationForm,
)
from django.core.exceptions import ValidationError

from contacts.models import Contact

User = get_user_model()

_INPUT = {"class": "form-input"}


class CustomerRegisterForm(UserCreationForm):
    email = forms.EmailField(
        widget=forms.EmailInput(attrs={**_INPUT, "autocomplete": "email"})
    )
    first_name = forms.CharField(
        max_length=150,
        required=False,
        widget=forms.TextInput(attrs={**_INPUT, "autocomplete": "given-name"}),
    )
    last_name = forms.CharField(
        max_length=150,
        required=False,
        widget=forms.TextInput(attrs={**_INPUT, "autocomplete": "family-name"}),
    )

    class Meta:
        model = User
        fields = ("email", "first_name", "last_name", "password1", "password2")

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields["password1"].widget.attrs.update(_INPUT)
        self.fields["password2"].widget.attrs.update(_INPUT)

    def clean_email(self):
        email = (self.cleaned_data.get("email") or "").strip().lower()
        if not email:
            raise ValidationError("Enter an email address.")
        taken = User.objects.filter(email__iexact=email).exists() or User.objects.filter(
            username__iexact=email
        ).exists()
        if taken:
            raise ValidationError("An account with that email already exists.")
        return email

    def save(self, commit=True):
        user = super().save(commit=False)
        email = self.cleaned_data["email"]
        user.username = email
        user.email = email
        user.first_name = (self.cleaned_data.get("first_name") or "").strip()
        user.last_name = (self.cleaned_data.get("last_name") or "").strip()
        if commit:
            user.save()
        return user


class CustomerAuthenticationForm(AuthenticationForm):
    username = forms.EmailField(
        label="Email",
        widget=forms.EmailInput(
            attrs={**_INPUT, "id": "id_username", "autocomplete": "email"}
        ),
    )

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields["password"].widget.attrs.update(
            {**_INPUT, "autocomplete": "current-password"}
        )


class CustomerPasswordResetForm(PasswordResetForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.fields["email"].widget.attrs.update({**_INPUT, "autocomplete": "email"})


class CustomerSetPasswordForm(SetPasswordForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        for field in self.fields.values():
            field.widget.attrs.update(_INPUT)


class CustomerProfileForm(forms.Form):
    first_name = forms.CharField(
        max_length=150,
        required=False,
        widget=forms.TextInput(attrs={**_INPUT, "autocomplete": "given-name"}),
    )
    last_name = forms.CharField(
        max_length=150,
        required=False,
        widget=forms.TextInput(attrs={**_INPUT, "autocomplete": "family-name"}),
    )
    phone = forms.CharField(
        max_length=32,
        required=False,
        widget=forms.TextInput(attrs={**_INPUT, "autocomplete": "tel"}),
    )
    address_line1 = forms.CharField(
        max_length=200,
        required=False,
        label="Street address",
        widget=forms.TextInput(
            attrs={
                **_INPUT,
                "autocomplete": "off",
                "data-ac": "line1",
            }
        ),
    )
    address_line2 = forms.CharField(
        max_length=200,
        required=False,
        label="Apt / suite",
        widget=forms.TextInput(
            attrs={
                **_INPUT,
                "autocomplete": "address-line2",
                "data-ac": "line2",
            }
        ),
    )
    address_city = forms.CharField(
        max_length=100,
        required=False,
        label="City",
        widget=forms.TextInput(
            attrs={
                **_INPUT,
                "autocomplete": "address-level2",
                "data-ac": "city",
            }
        ),
    )
    address_state = forms.CharField(
        max_length=32,
        required=False,
        label="State",
        widget=forms.TextInput(
            attrs={
                **_INPUT,
                "autocomplete": "address-level1",
                "data-ac": "state",
            }
        ),
    )
    address_zip = forms.CharField(
        max_length=20,
        required=False,
        label="ZIP",
        widget=forms.TextInput(
            attrs={
                **_INPUT,
                "autocomplete": "postal-code",
                "data-ac": "zip",
            }
        ),
    )

    def shipping_address(self) -> dict:
        data = self.cleaned_data
        return Contact.make_postal_address(
            line1=data.get("address_line1") or "",
            line2=data.get("address_line2") or "",
            city=data.get("address_city") or "",
            state=data.get("address_state") or "",
            zip_code=data.get("address_zip") or "",
        )