"""
grader_api.py - Grader CLASSES for validator.
Validator calls: Task1Grader().grade(env) and checks 0 < result < 1
"""
import math

from server.graders.json_grader import grade_task1 as _r1
from server.graders.yaml_grader import grade_task2 as _r2
from server.graders.dockerfile_grader import grade_task3 as _r3
from server.graders.compose_grader import grade_task4 as _r4
from server.graders.k8s_grader import grade_task5 as _r5
from server.graders.github_actions_grader import grade_task6 as _r6
from server.graders.nginx_grader import grade_task7 as _r7


def _safe_grade(raw_fn, env):
    try:
        if env is None:
            return 0.50
        config = getattr(env, 'current_broken_config', None) or ""
        if not config:
            obs = getattr(env, '_build_observation', lambda: None)()
            if obs is not None:
                config = getattr(obs, 'broken_config', "") or ""
        if not config:
            return 0.50
        result = raw_fn(str(config))
        if isinstance(result, (tuple, list)):
            reward = float(result[0])
        else:
            reward = float(result)
        if math.isnan(reward) or math.isinf(reward):
            return 0.50
        return max(0.01, min(0.99, reward))
    except Exception:
        return 0.50


class Task1Grader:
    def grade(self, env, *args, **kwargs) -> float:
        return _safe_grade(_r1, env)


class Task2Grader:
    def grade(self, env, *args, **kwargs) -> float:
        return _safe_grade(_r2, env)


class Task3Grader:
    def grade(self, env, *args, **kwargs) -> float:
        return _safe_grade(_r3, env)


class Task4Grader:
    def grade(self, env, *args, **kwargs) -> float:
        return _safe_grade(_r4, env)


class Task5Grader:
    def grade(self, env, *args, **kwargs) -> float:
        return _safe_grade(_r5, env)


class Task6Grader:
    def grade(self, env, *args, **kwargs) -> float:
        return _safe_grade(_r6, env)


class Task7Grader:
    def grade(self, env, *args, **kwargs) -> float:
        return _safe_grade(_r7, env)