from dataclasses import dataclass
from typing import Any, Optional

from django.core.handlers.wsgi import WSGIRequest
from django.http import HttpResponse
from django.shortcuts import render

from project.main.views.demo_view_base import DemoViewBase


@dataclass
class Validation:
    validated: bool = False

    name: Optional[str] = None
    consent: Optional[bool] = None
    age: Optional[int] = None

    name_error: Optional[str] = None
    age_error: Optional[str] = None
    consent_error: Optional[str] = None


class FormValidationView(DemoViewBase):
    template_name = "main/form_validation.html"
    active_section = "form-validation"
    title = "Form Validation"

    def get_context_data(self, **kwargs) -> dict[str, Any]:
        context = super().get_context_data(**kwargs)
        context.update(
            {
                "validation": Validation(),
            }
        )
        return context

    def post(self, request: WSGIRequest, *args, **kwargs) -> HttpResponse:
        validation = Validation(
            validated=True,
            name=request.POST.get("name", ""),
            age=request.POST.get("age", ""),
            consent=request.POST.get("consent") == "on",
        )

        if len(validation.name) < 3 or len(validation.name) > 10:
            validation.name_error = "Name must be between 3 and 10 chars long"

        try:
            age = int(validation.age)
        except ValueError:
            validation.age_error = "Invalid integer"
        else:
            if age < 1 or age > 100:
                validation.age_error = "Age should be between 1 and 100"

        if not validation.consent:
            validation.consent_error = "You should consent"

        return render(
            context={
                "validation": validation,
            },
            template_name="main/form_validation_content.html",
            request=request,
        )