import random
from core.AcronymManager import AcronymManager

class QuizEngine:
    def __init__(self):
        # reuse the existing manager to load the JSON
        self.acronym_mgr = AcronymManager()

    def get_random_acronym(self):
        """
        Fetches a random acronym-definition pair.
        Returns: dict or None (if empty)
        """
        if not self.acronym_mgr.acronyms:
            return None
        
        # Pick a random key
        acronym = random.choice(list(self.acronym_mgr.acronyms.keys()))
        definition = self.acronym_mgr.acronyms[acronym]
        
        return {
            "type": "acronym",
            "term": acronym,
            "correct_definition": definition,
            "question": f"What does **{acronym}** stand for?"
        }

    def construct_grading_prompt(self, term, correct_definition, user_answer):
        """
        Builds the prompt for the Board Examiner persona.
        We return the string here so app.py can send it to whichever LLM is active.
        """
        return (
            f"You are a strict US Navy Engineering Duty Officer Board Examiner.\n"
            f"I am a candidate. You asked me to define the acronym: {term}\n\n"
            f"The Official Definition is: {correct_definition}\n"
            f"My Answer was: {user_answer}\n\n"
            f"INSTRUCTIONS:\n"
            f"1. Grade my answer as PASS (Correct expansion) or FAIL (Incorrect expansion).\n"
            f"2. If I got the words right but missed the full context, give me a 'PASS with Comments'.\n"
            f"3. Keep your feedback short and military-professional.\n\n"
            f"OUTPUT FORMAT:\n"
            f"**GRADE:** [PASS/FAIL]\n"
            f"**CRITIQUE:** [Your brief feedback]"
        )