from __future__ import annotations

from django import forms
from django.contrib.auth import get_user_model
from django.core.exceptions import ValidationError
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, Field

from .models import Organization, UserProfile
from api.models import Profile as ApiProfile


class OrganizationForm(forms.ModelForm):
    class Meta:
        model = Organization
        fields = ["name", "code", "timezone", "currency_code"]


## ProvidedService moved to recycle_core app; form now lives in recycle_core.forms


class UserSelfForm(forms.ModelForm):
    class Meta:
        model = get_user_model()
        fields = ["first_name", "last_name", "email"]

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_tag = False
        self.helper.layout = Layout(
            Field("first_name"),
            Field("last_name"),
            Field("email"),
        )


class ProfileSelfForm(forms.ModelForm):
    tags = forms.CharField(label="Tags", required=False, help_text="Comma-separated")

    class Meta:
        model = ApiProfile
        fields = ["bio", "interests", "industry"]

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.helper = FormHelper()
        self.helper.form_tag = False
        self.helper.layout = Layout(
            Field("bio"),
            Field("interests"),
            Field("industry"),
            Field("tags"),
        )
        if self.instance and getattr(self.instance, "pk", None):
            try:
                names = list(self.instance.tags.names())
                self.fields["tags"].initial = ", ".join(names)
            except Exception:
                self.fields["tags"].initial = ""

    def save(self, commit: bool = True):
        profile = super().save(commit)
        tags = [t.strip() for t in self.cleaned_data.get("tags", "").split(",") if t.strip()]
        try:
            if commit and hasattr(profile, "tags"):
                profile.tags.set(tags)
        except Exception:
            pass
        return profile


class UserProfilePhotoForm(forms.ModelForm):
    remove_photo = forms.BooleanField(label="Remove current photo", required=False)

    class Meta:
        model = UserProfile
        fields = ["my_photo", "remove_photo"]

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # Friendlier widget: accept images only, keep input visually hidden (we trigger via button)
        self.fields["my_photo"].widget = forms.ClearableFileInput(attrs={
            "accept": "image/*",
            "class": "hidden",
            "id": "id_my_photo",
        })
        self.helper = FormHelper()
        self.helper.form_tag = False
        self.helper.layout = Layout(
            Field("my_photo"),
            Field("remove_photo"),
        )

    def clean_my_photo(self):
        f = self.cleaned_data.get("my_photo")
        if not f:
            return f
        # Basic size/type validation (max ~5MB)
        try:
            content_type = getattr(f, "content_type", "")
            if content_type and not content_type.startswith("image/"):
                raise ValidationError("Please upload an image file.")
        except Exception:
            # If storage/file doesn't provide content_type, best-effort skip
            pass
        max_bytes = 5 * 1024 * 1024
        if getattr(f, "size", 0) and f.size > max_bytes:
            raise ValidationError("Image too large (max 5MB).")
        return f

    def save(self, commit: bool = True):
        instance: UserProfile = super().save(commit=False)
        remove = self.cleaned_data.get("remove_photo", False)
        new_file = self.cleaned_data.get("my_photo")
        if remove and not new_file:
            # Clear current photo
            try:
                if instance.my_photo:
                    instance.my_photo.delete(save=False)
            except Exception:
                pass
            instance.my_photo = None
        if commit:
            instance.save()
        return instance