import pytest

from app.core.errors import RecoverableAgentError, ValidationAgentError
from app.service.intent_classifier import IntentClassifier
from app.service.model_gateway import ModelExecution


class StubModel:
    def __init__(self, text: str) -> None:
        self.text = text

    async def generate(self, _endpoints: list[object], _prompt: str) -> ModelExecution:
        return ModelExecution("intent", self.text, 1)


@pytest.mark.asyncio
async def test_classifies_and_marks_low_confidence() -> None:
    classifier = IntentClassifier(StubModel('{"intent":"profile","confidence":0.4}'), threshold=0.6)
    result = await classifier.classify(
        message="我的资料", supported_intents=("profile", "general"), endpoints=[object()]
    )
    assert result.intent == "profile"
    assert result.needs_clarification is True


@pytest.mark.asyncio
async def test_fenced_json_is_supported() -> None:
    classifier = IntentClassifier(StubModel(
        "```json\n{\"intent\":\"general\",\"confidence\":1}\n```"
    ))
    result = await classifier.classify(
        message="你好", supported_intents=("general",), endpoints=[object()]
    )
    assert result.needs_clarification is False


@pytest.mark.asyncio
async def test_unknown_intent_and_invalid_json_fail_closed() -> None:
    with pytest.raises(ValidationAgentError):
        await IntentClassifier(StubModel('{"intent":"trade","confidence":1}')).classify(
            message="下单", supported_intents=("general",), endpoints=[object()]
        )
    with pytest.raises(RecoverableAgentError):
        await IntentClassifier(StubModel("not-json")).classify(
            message="你好", supported_intents=("general",), endpoints=[object()]
        )