"""DTU MQTT 业务端模拟测试脚本

模拟上层业务系统：
1. 订阅 DTU 上行主题（register/status/response/patchpanel/jumper/env）
2. 下发全套下行控制指令到 control 主题
3. 打印 DTU 返回的响应/状态，验证协议端到端

参照《线架系统功能需求与MQTT协议设计.md》第 7 章。
"""
import json
import time
import uuid

import paho.mqtt.client as mqtt

# ===== 配置 =====
BROKER = "xt.wenhq.top"
PORT = 8581
USER = "admin"
PASS = "admin"

PREFIX = "线架系统"
CUSTOMER = "default_customer"
DTU_ID = "dtu_001"
PANEL_ID = "PANEL_dtu_001_2"  # DTU 当前在线面板（地址2）

control_topic = f"{PREFIX}/{CUSTOMER}/dtu/{DTU_ID}/control"

received = []


def on_connect(client, userdata, flags, rc):
    print(f"[业务端] 已连接 broker rc={rc}")
    client.subscribe(f"{PREFIX}/{CUSTOMER}/#", qos=1)
    print(f"[业务端] 已订阅 {PREFIX}/{CUSTOMER}/#")


def on_message(client, userdata, msg):
    try:
        payload = json.loads(msg.payload.decode("utf-8"))
        body = json.dumps(payload, ensure_ascii=False)
    except Exception:
        body = msg.payload.decode("utf-8", errors="replace")
    print(f"[收到] {msg.topic}\n        {body}")
    received.append((msg.topic, payload))


def send_control(client, command, target, params=None):
    envelope = {
        "msg_id": f"ctrl_{uuid.uuid4().hex[:8]}",
        "timestamp": int(time.time() * 1000),
        "dtu_id": DTU_ID,
        "type": "CONTROL",
        "payload": {"command": command, "target": target, "params": params or {}},
    }
    print(f"\n[下发] {control_topic}\n        {json.dumps(envelope, ensure_ascii=False)}")
    client.publish(control_topic, json.dumps(envelope), qos=1)
    return envelope["msg_id"]


def main():
    client = mqtt.Client(client_id="business_test")
    client.username_pw_set(USER, PASS)
    client.on_connect = on_connect
    client.on_message = on_message
    client.connect(BROKER, PORT, 60)
    client.loop_start()

    print("等待 3 秒收集上行消息（register/status）...")
    time.sleep(3)

    # 下发全套控制指令（每条间隔 3 秒等响应）
    send_control(client, "QUERY_DTU_STATUS", "dtu")
    time.sleep(3)
    send_control(client, "READ_PANEL_STATUS", PANEL_ID)
    time.sleep(3)
    send_control(client, "QUERY_JUMPER_STATUS", "all")
    time.sleep(3)
    send_control(client, "QUERY_ENV_SENSOR", "all")
    time.sleep(3)
    send_control(client, "SET_PORT_LED", PANEL_ID, {"port_id": 1, "led_mode": "BLINK_RED"})
    time.sleep(3)
    send_control(client, "SET_PORT_LED", PANEL_ID, {"port_id": 1, "led_mode": "OFF"})
    time.sleep(2)

    print(f"\n=== 测试完成，共收到 {len(received)} 条上行消息 ===")
    client.loop_stop()
    client.disconnect()


if __name__ == "__main__":
    main()