"""命令监听处理器：匹配 #命令名+空格 格式的消息，转发到外部回调 URL。"""

import re

import aiohttp

from ..config import COMMAND_CALLBACK_URL, COMMAND_LENGTH, COMMAND_PREFIX
from ..response import error, ok


def build_command_pattern() -> re.Pattern:
    """构建命令匹配正则：# + N个中文字 + 空格。"""
    return re.compile(
        rf"^{re.escape(COMMAND_PREFIX)}([\u4e00-\u9fff]{{{COMMAND_LENGTH}}})\s+(.+)",
        re.DOTALL,
    )


COMMAND_PATTERN = build_command_pattern()


def parse_command(raw_message: str) -> dict | None:
    """解析消息，匹配命令模式。返回 {command, content, raw_message} 或 None。"""
    match = COMMAND_PATTERN.match(raw_message.strip())
    if not match:
        return None
    return {
        "command": match.group(1),
        "content": match.group(2).strip(),
        "raw_message": raw_message.strip(),
    }


async def send_command_callback(data: dict, logger) -> bool:
    """将命令数据 POST 到外部回调 URL。返回是否成功。"""
    if not COMMAND_CALLBACK_URL:
        logger.warning("COMMAND_CALLBACK_URL 未配置，跳过命令回调")
        return False

    try:
        async with aiohttp.ClientSession() as session:
            async with session.post(
                COMMAND_CALLBACK_URL,
                json=data,
                timeout=aiohttp.ClientTimeout(total=10),
            ) as resp:
                if resp.status >= 400:
                    body = await resp.text()
                    logger.error(
                        "命令回调失败: status=%d url=%s body=%s",
                        resp.status, COMMAND_CALLBACK_URL, body[:200],
                    )
                    return False
                return True
    except Exception as exc:
        logger.error("命令回调异常: url=%s error=%s", COMMAND_CALLBACK_URL, exc)
        return False