from django.forms import (
    Form,
    ModelForm,
    ModelMultipleChoiceField,
    ModelChoiceField,
    ChoiceField,
    CharField,
)
from django.forms import inlineformset_factory

from .models import (
    Answer,
    CidUserAnswer,
    AnatomyQuestion,
    #Examination,
    BodyPart,
    Structure,
    Region,
    Modality,
    QuestionType,
    Exam,
)
from generic.models import Examination

from django.contrib.admin.widgets import FilteredSelectMultiple
from django.forms.widgets import RadioSelect, TextInput, Textarea

from dal import autocomplete

class AnatomyAnswerForm(ModelForm):
    class Meta:
        model = CidUserAnswer
        fields = ("answer",)


class MarkAnatomyQuestionForm(Form):
    # correct = forms.CharField(required=False)
    # half_correct = forms.CharField(required=False)
    # incorrect = forms.CharField(required=False)
    marked_answers = CharField(required=False)


class AnatomyQuestionForm(ModelForm):

    #exams = ModelMultipleChoiceField(required=False, queryset=Exam.objects.all())

    class Media:
        # Django also includes a few javascript files necessary
        # for the operation of this form element. You need to
        # include <script src="/admin/jsi18n"></script>
        # in the template.
        css = {
            "all": ["css/widgets.css"],
        }
        # Adding this javascript is crucial
        js = ["jsi18n.js", "tesseract.min.js"]

    def __init__(self, *args, **kwargs):
        self.user = kwargs.pop('user')  # To get request.user. Do not use kwargs.pop('user', None) due to potential security hole
        if kwargs.get("instance"):
            # We get the 'initial' keyword argument or initialize it
            # as a dict if it didn't exist.
            initial = kwargs.setdefault("initial", {})
            # The widget for a ModelMultipleChoiceField expects
            # a list of primary key for the selected data.
            initial["exams"] = [t.pk for t in kwargs["instance"].exams.all()]

        ModelForm.__init__(self, *args, **kwargs)

        super(AnatomyQuestionForm, self).__init__(*args, **kwargs)
        # self.fields['question'].widget.attrs = {'class': 'question-form', 'rows': 10, 'cols': 100}
        # self.fields['feedback'].widget.attrs = {'class': 'feedback-form', 'rows': 10, 'cols': 100}
        self.fields["question_type"] = ModelChoiceField(
            required=True,
            queryset=QuestionType.objects.all(),
            initial=1,
        )

        self.fields["region"] = ModelChoiceField(
            required=False,
            queryset=Region.objects.all(),
        )

        self.fields["modality"] = ModelChoiceField(
            required=True,
            queryset=Modality.objects.all(),
        )

        self.fields["examination"] = ModelChoiceField(
            required=False,
            queryset=Examination.objects.all(),
        )

        self.fields["body_part"] = ModelChoiceField(
            required=False,
            queryset=BodyPart.objects.all(),
        )

        if self.user.groups.filter(name="anatomy_checker").exists():
            exam_queryset = Exam.objects.all()
        else:
            exam_queryset = Exam.objects.filter(author__id=self.user.id) | Exam.objects.filter(open_access=True)

        self.fields["exams"] = ModelMultipleChoiceField(
            required=False,
            queryset=exam_queryset,
            widget=FilteredSelectMultiple(verbose_name="Exams", is_stacked=False),
        )


    def save(self, commit=True):
        # Get the unsaved Pizza instance
        instance = ModelForm.save(self, False)

        # Prepare a 'save_m2m' method for the form,
        old_save_m2m = self.save_m2m

        def save_m2m():
            old_save_m2m()
            # This is where we actually link the pizza with toppings
            instance.exams.clear()
            for exam in self.cleaned_data["exams"]:
                instance.exams.add(exam)

        self.save_m2m = save_m2m

        # Do we need to save all changes now?
        # if commit:
        instance.save()
        self.save_m2m()

        return instance

    class Meta:
        model = AnatomyQuestion

        fields = [
            "question_type",
            "image",
            "region",
            "modality",
            "structure",
            "examination",
            "body_part",
            "description",
            "open_access",
        ]

        widgets = {
            "structure" : autocomplete.ModelSelect2(url='anatomy:structure-autocomplete')
        }


AnswerFormSet = inlineformset_factory(
    AnatomyQuestion,
    Answer,
    fields=["answer", "status"],
    widgets={
        "answer": Textarea(
            attrs={"required": "true", "minlength": 2, "maxlength": 500, "rows": 3}
        )
    },
    exclude=[],
    can_delete=True,
    extra=1,
    max_num=10,
)

AnswerUpdateFormSet = inlineformset_factory(
    AnatomyQuestion,
    Answer,
    fields=["answer", "status"],
    widgets={
        "answer": Textarea(
            attrs={"required": "true", "minlength": 2, "maxlength": 500, "rows": 3}
        )
    },
    exclude=[],
    can_delete=True,
    extra=0,
    max_num=10,
)


class ExaminationForm(ModelForm):
    class Meta:
        model = Examination
        fields = ["examination"]


class StructureForm(ModelForm):
    class Meta:
        model = Structure
        fields = ["structure"]


class BodyPartForm(ModelForm):
    class Meta:
        model = BodyPart
        fields = ["bodypart"]

class ExamForm(ModelForm):
    class Meta:
        model = Exam
        fields = ["name", "time_limit", "open_access", "exam_mode", "active", "archive"]