"""Implementation of /setting for per-platform user and group modes."""
from __future__ import annotations

from agent.modes import ModeStore
from channel import send_message


async def handle_setting(channel, msg_type, user_id, target_id, raw_text):
    parts = (raw_text or "").strip().split()
    arg = parts[1].lower() if len(parts) > 1 else ""
    store = ModeStore()
    group_id = target_id if msg_type == "group" else None
    if msg_type == "group" and not channel.is_admin(user_id):
        await send_message(channel, msg_type, target_id, "只有管理员可以修改本群的回复模式")
        return
    if msg_type != "group" and user_id is None:
        await send_message(channel, msg_type, target_id, "绑定统一身份后才能使用聊天模式")
        return
    if arg not in ("command", "chat"):
        current = store.get_mode(channel.name, user_id, group_id)
        await send_message(
            channel, msg_type, target_id,
            f"当前是 {current} 模式。\n"
            "发送 .setting command 使用传统命令；发送 .setting chat 使用自然语言聊天和工具调用。",
            mirror=False,
        )
        return
    store.set_mode(channel.name, user_id, arg, group_id)
    text = (
        "已切换为 command 模式。所有旧命令保持不变，发送 .help 查看服务。"
        if arg == "command"
        else "已切换为 chat 模式。现在可以直接用自然语言告诉我你想做什么；旧命令仍然可用。"
    )
    await send_message(channel, msg_type, target_id, text, mirror=False)