import json
import logging

logger = logging.getLogger("cs_agent")


async def handle_incoming_message(client, message: str, *, shop_type_resolver):
    """处理单条入站消息（从 websocket_client.py 拆出）。"""
    timestamp = client.get_time()
    try:
        data = json.loads(message)

        # 多进程分片检查：确保同一客户只由一个 worker 处理
        customer_key = client._customer_key(data)
        if not client._is_owned_by_this_worker(customer_key):
            return

        timestamp = client.get_time()

        # 保存最后一条消息用于回复
        client.last_msg = data

        # 打印格式化的消息
        logger.info(f"\n{'='*50}")
        logger.info(f"[{timestamp}] 收到新消息:")
        logger.info(f"{'='*50}")
        logger.info(f"  消息ID: {data.get('msg_id', 'N/A')}")
        logger.info(f"  账号ID: {client.to_chinese(data.get('acc_id', 'N/A'))}")
        logger.info(f"  发送者ID: {client.to_chinese(data.get('from_id', 'N/A'))}")
        logger.info(f"  发送者名称: {client.to_chinese(data.get('from_name', 'N/A'))}")
        logger.info(f"  会话ID: {client.to_chinese(data.get('cy_id', 'N/A'))}")
        logger.info(f"  平台类型: {data.get('acc_type', 'N/A')}")
        logger.info(f"  消息类型: {client.get_msg_type_name(data.get('msg_type', 0))}")
        logger.info(f"  消息内容: {client.to_chinese(data.get('msg', 'N/A'))}")

        # 显示商品信息（如果有）
        if data.get('goods_name'):
            logger.info(f"  商品名称: {client.to_chinese(data.get('goods_name', ''))}")
        if data.get('goods_order'):
            logger.info(f"  订单信息: {client.to_chinese(data.get('goods_order', ''))}")

        logger.info(f"{'='*50}\n")

        # 消息去重：同一条消息不重复处理
        msg_id = data.get('msg_id', '')
        if msg_id and msg_id in client._replied_msg_ids:
            logger.info(f"重复消息，跳过: {msg_id}")
            return
        if msg_id:
            client._replied_msg_ids.append(msg_id)  # deque 自动淘汰最旧的

        # 空消息/无效消息过滤（N/A 或关键字段全为空）
        from_id = data.get('from_id', '')
        acc_id = data.get('acc_id', '')
        if not from_id or from_id == 'N/A' or not acc_id or acc_id == 'N/A':
            logger.info(f"[{client.get_time()}] 空消息跳过（from_id={from_id!r} acc_id={acc_id!r}）")
            return
        client._log_inbound_once(data)
        client._fire_and_forget(client._post_tianwang_callback("message_received", data))

        # Gemini 店铺：不回复，直接跳过
        goods_name = client.to_chinese(data.get('goods_name', '') or '')
        if shop_type_resolver(acc_id, goods_name) == "gemini_api":
            logger.info(f"[{client.get_time()}] Gemini 店铺消息，跳过")
            client._push_chat_to_wechat_safe(
                data=data,
                customer_msg=data.get('msg', ''),
                reply_msg="",
                goods_name=goods_name,
                tag="gemini店铺跳过",
            )
            return

        # 使用 Agent 自动回复（仅处理文本消息）
        if client.enable_agent:
            msg_type = data.get('msg_type', 0)
            if msg_type == 0:
                if client._is_transfer_msg(data):
                    # 会话转交 → 主动打招呼
                    logger.info(f"[{client.get_time()}] 收到转交消息，发送问候")
                    greeting = client._pick_transfer_greeting()
                    await client.send_reply(data, greeting)
                    client._push_chat_to_wechat_safe(
                        data=data,
                        customer_msg=data.get('msg', ''),
                        reply_msg=greeting,
                        tag="转交问候",
                    )
                elif client._is_shop_card(data):
                    # 进店卡片：有历史对话就不回复，没有才打招呼（Gemini 已在上面统一跳过）
                    cid = data.get('from_id', '')
                    acc_id = data.get('acc_id', '')
                    residual_text = client._extract_customer_text_from_shop_card_msg(data.get('msg', ''))
                    if residual_text:
                        logger.info(f"[{client.get_time()}] 进店卡片携带客户文本，转普通消息处理: {residual_text}")
                        patched = dict(data)
                        patched['msg'] = residual_text
                        await client._debounce_agent_reply(patched)
                    elif client._has_chat_history(cid, acc_id=acc_id):
                        logger.info(f"[{client.get_time()}] 进店卡片（已有记录），跳过")
                    else:
                        logger.info(f"[{client.get_time()}] 进店卡片（新客户），发送问候")
                        greeting = "在呢，发图来我看看"
                        await client.send_reply(data, greeting)
                        client._push_chat_to_wechat_safe(
                            data=data,
                            customer_msg=data.get('msg', ''),
                            reply_msg=greeting,
                            goods_name=goods_name,
                            tag="进店卡片问候",
                        )
                elif await client._handle_system_inquiry(data):
                    logger.info(f"[{client.get_time()}] 系统客服询单消息，已按规则处理")
                elif client._should_ignore(data):
                    logger.info(f"[{client.get_time()}] 系统通知，跳过回复")
                else:
                    await client._debounce_agent_reply(data)
            elif msg_type == 1:
                # 图片消息直接处理，不走防抖（图片不会连续多发）
                await client.handle_image_message(data)

    except json.JSONDecodeError:
        logger.info(f"[{timestamp}] 收到非JSON消息: {message}")