import json
from pathlib import Path
from typing import Any

from app.character.card import DEFAULT_CARD, build_system_prompt, normalize_card

CARD_PATH = Path("./data/character.json")


class CharacterService:
    def get_card(self) -> dict[str, Any]:
        if CARD_PATH.is_file():
            try:
                raw = json.loads(CARD_PATH.read_text(encoding="utf-8"))
                return normalize_card(raw)
            except (json.JSONDecodeError, OSError):
                pass
        return normalize_card(DEFAULT_CARD)

    def save_card(self, raw: dict[str, Any]) -> dict[str, Any]:
        card = normalize_card(raw)
        CARD_PATH.parent.mkdir(parents=True, exist_ok=True)
        CARD_PATH.write_text(json.dumps(card, ensure_ascii=False, indent=2), encoding="utf-8")
        return card

    def get_system_prompt(self) -> str:
        return build_system_prompt(self.get_card())