// E3 — MIPS cloud subscription example.
// Demonstrates: connect to MQTT cloud broker → subscribe to device prop/event → wait for messages.
package main

import (
	"fmt"
	"os"
	"time"

	"xiaomihome/miot"
	"xiaomihome/miot/examples/config"
)

func main() {
	// 1. Load config
	cfg, err := config.LoadConfig(config.DefaultPath())
	if err != nil {
		fmt.Printf("Load config error: %v\n", err)
		return
	}
	if cfg.AuthInfo.AccessToken == "" {
		fmt.Println("请先运行 E1 cloud_oauth 获取 token")
		os.Exit(1)
	}

	// Need a device DID — hardcode or get from config
	did := "2053225728" // use UID as placeholder, user should replace

	fmt.Printf("使用 DID: %s (如无效请修改)\n", did)

	// 2. Create MIPS cloud client
	mips := miot.NewMipsCloudClient(
		"ssl://cn-ha.mqtt.io.mi.com:8883",
		"ha."+cfg.UUID,
		miot.OAUTH2_CLIENT_ID,
		cfg.AuthInfo.AccessToken,
	)
	fmt.Println("正在连接 MIPS Cloud...")
	if err := mips.Connect(); err != nil {
		fmt.Printf("MIPS Connect error: %v\n", err)
		return
	}
	defer mips.Disconnect()
	fmt.Println("MIPS Cloud 已连接")

	// 4. Subscribe to property changes (wildcard: all properties)
	propTopic := fmt.Sprintf("device/%s/up/properties_changed/#", did)
	fmt.Printf("订阅属性: %s\n", propTopic)
	_ = mips.Subscribe(propTopic, func(topic string, payload []byte) {
		fmt.Printf("[属性变化] topic=%s, payload=%s\n", topic, string(payload))
	})

	// 5. Subscribe to events
	eventTopic := fmt.Sprintf("device/%s/up/event_occured/#", did)
	fmt.Printf("订阅事件: %s\n", eventTopic)
	_ = mips.Subscribe(eventTopic, func(topic string, payload []byte) {
		fmt.Printf("[事件] topic=%s, payload=%s\n", topic, string(payload))
	})

	// 6. Subscribe to device state
	stateTopic := fmt.Sprintf("device/%s/state/#", did)
	fmt.Printf("订阅状态: %s\n", stateTopic)
	_ = mips.Subscribe(stateTopic, func(topic string, payload []byte) {
		fmt.Printf("[状态变化] topic=%s, payload=%s\n", topic, string(payload))
	})

	// 7. Wait for messages
	fmt.Println("\n等待设备消息 (60秒)...")
	time.Sleep(60 * time.Second)
	fmt.Println("示例结束")
}