"""
grader.py  (Task 2 – Property Discovery)
-----------------------------------------
Deterministic scorer for natural-language property submissions.
One submission attempt per episode.
"""

from __future__ import annotations

from typing import Tuple
from utils import SemanticMatcher


# ── Grader ────────────────────────────────────────────────────────────────────

class Task2Grader:
    """
    Grades a Task 2 property submission.

    Parameters
    ----------
    function_name  : name of the target function
    property  : the 'property' field from the target function's data
    """

    def __init__(self, function_name: str, property: str) -> None:
        self.function_name    = function_name
        self.property         = property

    # ── Public API ────────────────────────────────────────────────────────────

    def grade(self, submitted: str) -> Tuple[float, str]:
        """Deterministic score in [0.0, 1.0]."""
        if not submitted or not submitted.strip():
            return 0.0, "no_match"

        SemanticMatcherInstance = SemanticMatcher()
        return (
            SemanticMatcherInstance.matchscore(self.property, submitted), 
            SemanticMatcherInstance.confidence()
        )