from django import forms
from django.core.exceptions import ValidationError
from django.contrib.admin.widgets import FilteredSelectMultiple

import re

from .models import (
    Educative,
    Skill,
    Routine,
    RoutineSkill,
    Passe,
)


class SkillForm(forms.ModelForm):
    class Meta:
        model = Skill
        fields = ("informations",)
        widgets = {
            "informations": forms.Textarea(
                attrs={
                    "class": "form-control",
                    "placeholder": "Informations about the skill : attention point, methodology, biomecanics, …",  # pylint: disable=line-too-long
                }
            ),
        }


class CombinationForm(forms.ModelForm):
    class Meta:
        model = Routine
        fields = (
            "long_label",
            "short_label",
            "difficulty",
            "level",
            "is_active",
            "is_routine",
            "is_competitive",
            "informations",
        )
        widgets = {
            "long_label": forms.TextInput(
                attrs={"class": "form-control", "placeholder": "Routine's long name"}
            ),
            "short_label": forms.TextInput(
                attrs={"class": "form-control", "placeholder": "Routine's short name"}
            ),
            "informations": forms.Textarea(
                attrs={
                    "class": "form-control",
                    "placeholder": "Informations about the psychological state of mind : context (why, where, …), possible consequencies, …",  # pylint: disable=line-too-long
                }
            ),
            "difficulty": forms.HiddenInput(),
            "level": forms.HiddenInput(),
            "is_active": forms.HiddenInput(),
        }


class CombinationSkillForm(forms.ModelForm):
    class Meta:
        model = RoutineSkill
        fields = (
            "routine",
            "skill",
            "rank",
        )
        widgets = {
            "routine": forms.HiddenInput(),
            "skill": forms.HiddenInput(),
            "rank": forms.NumberInput(),
        }


class PasseForm(forms.ModelForm):

    educatives = forms.ModelMultipleChoiceField(
        required=False,
        queryset=Educative.objects.all(),
        widget=FilteredSelectMultiple("Educatives", is_stacked=False),
        # widget=customFilteredSelectMultiple(verbose_name='test2',is_stacked=False)
    )

    class Media:
        css = {
            "all": ["admin/css/widgets.css"],
        }
        # Adding this javascript is crucial
        js = ["/admin/jsi18n/"]

    class Meta:
        model = Passe
        fields = ("label", "regexp", "educatives", "informations")

        widgets = {
            "label": forms.TextInput(
                attrs={
                    "class": "form-control",
                    "placeholder": "Label (not mandatory)",
                    "maxlength": 30,
                }
            ),
            "regexp": forms.TextInput(
                attrs={"class": "form-control", "placeholder": "[2-8]"}
            ),
            "informations": forms.Textarea(
                attrs={
                    "class": "form-control",
                    "placeholder": "Informations about the passe…",  # pylint: disable=line-too-long
                }
            ),
        }

    def clean_regexp(self):
        """Vérifie que la regexp entrée par l'utilisateur est valide."""
        regexp = self.cleaned_data["regexp"]
        if not Passe.is_valid_regexp(regexp):
            raise ValidationError("Entered regexp not valid.")

        return regexp

    def clean(self):
        """Vérifie le contenu des champs `educatives` par rapport à la valeur de `regexp`. Si
        `regexp` est définie par :
                - valeurs de ROUTINE_TYPE_CHOICE    il faut que     Educatives soit VIDE
                    - avec [x-y]
                - [x-y]                                 "           Educatives soit NON VIDE
                - WC                                    "           il y ait 2+ Educatives
                - x|                                    "           il y ait 1! Educatives
        """
        cleaned_data = super().clean()
        regexp = ["regexp"]

        if regexp is not None:
            arguments = regexp.split(" ")
            educatives = cleaned_data["educatives"]

            if Passe.is_valid_routine_type(arguments[0]) and educatives is not None:
                raise ValidationError(
                    "Educatives must be empty with the entered Regexp."
                )

            if Passe.is_valid_subset(arguments[0]) and educatives is None:
                raise ValidationError(
                    "Educatives can't be empty with the entered Regexp."
                )

            if re.match(r"[1-9]+\|", arguments[0]) and len(educatives) != 1:
                raise ValidationError(
                    "One and only one Educatives allowed with the entered Regexp."
                )

            if arguments[0] == "WC" and (educatives is None or len(educatives) < 2):
                raise ValidationError(
                    "At least two Educatives with the entered Regexp."
                )

        return cleaned_data