from django import forms
from django.db.models.query import QuerySet
from django.http import HttpRequest
from django.contrib import admin, messages
from django.utils.safestring import SafeText

from import_export import fields
from import_export.admin import ImportMixin
from import_export.tmp_storages import CacheStorage
from import_export.resources import ModelResource
from import_export.forms import ConfirmImportForm, ImportForm

from django_admin_action_forms import AdminActionFormsMixin, AdminActionForm, action_with_form

from typing import Any, Dict

from ..models.courses import Course
from ..models.students import Student

from ..custom.colortag import course_color

# Custom import form to select a course for student input
class StudentCustomConfirmImportForm(ConfirmImportForm):
    course = forms.ModelChoiceField(
        queryset=Course.objects.all(),
        required=False)

# Resource Class for Student data import
class StudentResource(ModelResource):
    surname = fields.Field(attribute="surname", column_name="surname")
    name = fields.Field(attribute="name", column_name="name")
    email = fields.Field(attribute="email", column_name="email")
    phone = fields.Field(attribute="phone", column_name="phone")

    # Cleanup fields before entering
    def before_import_row(self, row: Dict[str, str], **kwargs) -> None:
        row["name"] = SafeText("-".join(c.capitalize() for c in row["name"].split(" ")).strip())
        row["surname"] = SafeText("-".join(c.capitalize() for c in row["surname"].split(" ")).strip())
        row["phone"] = SafeText(row["phone"].replace(" ",""))
        row["email"] = SafeText(row["email"].lower().strip())
        return super().before_import_row(row, **kwargs)
    
    # If course was addedd as a form kwasrg add it to the student after creation
    def after_init_instance(self, instance: Student, new: bool, row: Dict[str, str], **kwargs: Dict[str, Any | Course]):
            course = kwargs.get("course", None)
            if course and isinstance(course, Course):
                instance.course = course

    class Meta:
        model = Student
        skip_unchanged = True
        report_skipped = True
        fields = ("surname", "name", "email", "phone",)
        import_id_fields = ("email", "phone",)

# Form Class for Student course change
class ChangeCourseForm(AdminActionForm):
    course = forms.ModelChoiceField(queryset=Course.objects.all())

class StudentAdmin(ImportMixin, AdminActionFormsMixin, admin.ModelAdmin):
    list_display = ("surname", "name", "course", "course_color", "email", "phone", "username", "password", "active",)
    list_filter = ("course", "active",)
    search_fields = ("surname", "name", "phone", "email",)
    actions = ("change_course", "disable_students",)
    resource_classes = [StudentResource]
    confirm_form_class = StudentCustomConfirmImportForm
    tmp_storage_class = CacheStorage
    skip_admin_log = True

    @admin.display(description="Color")
    def course_color(self, obj: Student) -> SafeText:
        if not obj.course:
            return SafeText("")
        return course_color(obj.course.color)

    @admin.display(description="Password")
    def password(self, obj: Student) -> SafeText:
        return SafeText(obj.default_password())
    
    @admin.display(description="Username")
    def username(self, obj: Student) -> SafeText:
        return SafeText(obj.default_username())
    
    @admin.action(description="Deactivate Students")
    def disable_students(self, request: HttpRequest, queryset: QuerySet[Student]):
        for q in queryset.all():
            if q.user:
                q.user.is_staff = False
                q.user.save()
        count: int = queryset.update(active = False)
        messages.success(request, f"{count} students deactivated")
        pass

    @action_with_form(ChangeCourseForm, description="Change Student Course")
    def change_course(self, request: HttpRequest, queryset: QuerySet[Student], data):
        course = data["course"]
        count: int = queryset.update(course=course)
        messages.success(request, f"{count} students updated to {course}")

    # Return the initial form for import confirmations, request course to user
    def get_confirm_form_initial(self, request: HttpRequest, import_form):
        initial = super().get_confirm_form_initial(request, import_form)
        if import_form and hasattr(import_form.cleaned_data, "course"):
            course: Course = import_form.cleaned_data["course"]
            initial["course"] = course.id
        return initial
    
    # Add course to import form kwargs to be used by resource to associate course with all imported students
    def get_import_data_kwargs(self, request: HttpRequest, *args, **kwargs):
        form: ImportForm | None = kwargs.get("form", None)
        if form and hasattr(form, "cleaned_data"):
            kwargs["course"] = form.cleaned_data.get("course", None)
        return kwargs