from datetime import datetime
import pytz
from typing import List

# 预缓存常用时区
TIMEZONE_CACHE = {
    "Asia/Shanghai": pytz.timezone("Asia/Shanghai"),
    "UTC": pytz.timezone("UTC"),
    "America/New_York": pytz.timezone("America/New_York"),
    "Europe/London": pytz.timezone("Europe/London"),
    "Australia/Sydney": pytz.timezone("Australia/Sydney")
}

def process(input_strings: List[str]) -> List[str]:
    """处理时间戳和文本的相互转换"""
    try:
        if len(input_strings) != 3:
            return ["错误：输入格式不正确，期望 [mode, input, timezone]"]
        mode, input_str, timezone = input_strings

        # 从缓存获取时区
        tz = TIMEZONE_CACHE.get(timezone)
        if not tz:
            return ["错误：无效的时区"]

        if mode == "timestamp_to_text":
            try:
                timestamp = int(input_str)
                dt = datetime.fromtimestamp(timestamp, tz=tz)
                return [dt.strftime("%Y-%m-%d %H:%M:%S %Z")]
            except ValueError:
                return ["错误：请输入有效的时间戳"]

        elif mode == "text_to_timestamp":
            try:
                try:
                    dt = datetime.strptime(input_str, "%Y-%m-%d %H:%M:%S")
                except ValueError:
                    dt = datetime.strptime(input_str, "%Y年%m月%d日 %H:%M:%S")
                dt = tz.localize(dt)
                return [str(int(dt.timestamp()))]
            except ValueError:
                return ["错误：请输入有效的日期格式（YYYY-MM-DD HH:MM:SS 或 YYYY年MM月DD日 HH:MM:SS）"]

        return ["错误：无效的转换模式"]
    except Exception as e:
        return [f"错误：{str(e)}"]