import json
from pathlib import Path
from .models import WorldState, AgentState, GlobalMeter

STATE_FILE = Path(__file__).parent.parent / "state.json"


def get_default_state() -> WorldState:
    """创建默认的世界状态"""
    return WorldState(
        tick=0,
        weather="sunny",
        town_mood=0,
        agents={
            "alice": AgentState(emotion="calm", goal="探索小镇", memory=[]),
            "bob": AgentState(emotion="calm", goal="与人交流", memory=[]),
        },
        events=[],
        global_meter=GlobalMeter(value=0, threshold=100, cooldown=0),
    )


def load_state() -> WorldState:
    """从文件加载状态，如果不存在则创建默认状态"""
    if STATE_FILE.exists():
        with open(STATE_FILE, "r", encoding="utf-8") as f:
            data = json.load(f)
            return WorldState(**data)
    return get_default_state()


def save_state(state: WorldState) -> None:
    """保存状态到文件"""
    with open(STATE_FILE, "w", encoding="utf-8") as f:
        json.dump(state.model_dump(), f, ensure_ascii=False, indent=2)