from __future__ import annotations

import json
from pathlib import Path

from app.schemas.intent import IntentDefinition


class IntentRegistry:
    def __init__(self, intents: list[IntentDefinition]) -> None:
        self._intents = {intent.intent_id: intent for intent in intents}

    @classmethod
    def from_json(cls, file_path: str) -> "IntentRegistry":
        data = json.loads(Path(file_path).read_text(encoding="utf-8"))
        intents = [IntentDefinition.model_validate(item) for item in data]
        return cls(intents)

    def get(self, intent_id: str) -> IntentDefinition:
        return self._intents[intent_id]

    def list(self) -> list[IntentDefinition]:
        return list(self._intents.values())

    def match(self, text: str) -> IntentDefinition | None:
        for intent in self._intents.values():
            if any(keyword in text for keyword in intent.keywords):
                return intent
        return None