import nested_admin
from django import forms
from django.db import models
from django.forms import TextInput, Textarea
from django.http import HttpRequest

from ..models.students import Student
from ..models.missions import Training
from ..models.weekpref import WeekPreference

from datetime import date

class TrainingForm(forms.ModelForm):
    model=Training

class TrainingInLIne(nested_admin.NestedTabularInline):
    model = Training
    form = TrainingForm
    extra = 0
    fk_name = 'weekpref'
    verbose_name_plural = "Training Missions"
    max_num = 7

    formfield_overrides = {
        models.CharField: {'widget': TextInput(attrs={'size':'20'})},
        models.TextField: {'widget': Textarea(attrs={'rows':4, 'cols':35})},
    }

    # If user is a student deny edit permission for week past the current one
    def has_change_permission(self, request: HttpRequest, obj: WeekPreference | None = None) -> bool:
        if hasattr(request.user, 'student') and obj:
            student: Student = request.user.student
            current_week: int = date.today().isocalendar().week
            if current_week > obj.week or not student.active:
                return False
        return True
    
    def has_delete_permission(self, request: HttpRequest, obj: WeekPreference | None = None) -> bool:
        return self.has_change_permission(request=request, obj=obj)
    
    def has_add_permission(self, request: HttpRequest, obj: WeekPreference | None = None) -> bool:
        return self.has_change_permission(request=request, obj=obj)