from pydantic import BaseModel
from typing import List, Optional

from models.attribute import Attribute

from lib.irt.item_response_function import ItemResponseFunction
from lib.irt.item_information_function import ItemInformationFunction

class Item(BaseModel):
  id: int
  passage: Optional[int]
  attributes: List[Attribute]
  b_param: float = 0.00

  def iif(self, solver_run, theta):
    return ItemInformationFunction(solver_run.irt_model).calculate(b_param=self.b_param,theta=theta)

  def irf(self, solver_run, theta):
    return ItemResponseFunction(solver_run.irt_model).calculate(b_param=self.b_param,theta=theta)

  def get_attribute(self, ref_attribute):
    for attribute in self.attributes:
      if attribute.id == ref_attribute.id and attribute.value == ref_attribute.value:
        return attribute.value
    return False

  def attribute_exists(self, ref_attribute):
    for attribute in self.attributes:
      if attribute.id == ref_attribute.id and attribute.value == ref_attribute.value:
        return True
    return False