// 示例 13：多用户模式（bridge 包）
//
// 演示 Pool + UserBridge 门面，外部只需 import bridge 一个包。
// 不直接依赖 xiaomi / devices / miot。

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"os"
	"os/signal"

	"xiaomihome/bridge"
	"xiaomihome/xiaomi"
)

type UserCfg struct {
	UID     int64           `json:"uid,string"`
	UUID    string          `json:"uuid"`
	Auth    xiaomi.AuthInfo `json:"auth"`
	DataDir string          `json:"data_dir"`
	HomeIDs []int64         `json:"home_ids,omitempty"`
}

func loadUsers(path string) ([]UserCfg, error) {
	data, _ := os.ReadFile(path)
	var users []UserCfg
	if err := json.Unmarshal(data, &users); err != nil {
		return nil, err
	}
	return users, nil
}

func main() {
	allUsers, err := loadUsers("users.json")
	if err != nil || len(allUsers) == 0 {
		log.Fatalf("请创建 users.json: %v", err)
	}

	ctx := context.Background()
	pool := bridge.NewPool()

	for _, u := range allUsers {
		b, err := pool.Add(ctx, u.UID, u.UUID, u.Auth, u.DataDir, u.HomeIDs)
		if err != nil {
			log.Printf("用户 %d 初始化失败: %v", u.UID, err)
			continue
		}

		// 注册全局回调 → 推送到 NATS / WebSocket / 数据库
		b.OnPropsChanged(func(id int64, did, deviceType, changed string, state interface{}) {
			log.Printf("[%d] %s/%s changed=%s → %+v", id, did, deviceType, changed, state)
		})

		// 下单 MQTT 订阅
		b.StartReceiving()

		// 云端拉初始状态
		b.FetchAllStates(ctx)
	}

	defer pool.Close()

	log.Printf("\n%d 个用户就绪", len(allUsers))

	// 演示：操作某台空调
	demoControl(ctx, pool, 2897121707, "2053225728")

	ch := make(chan os.Signal, 1)
	signal.Notify(ch, os.Interrupt)
	<-ch
	log.Println("退出")
}

func demoControl(ctx context.Context, pool *bridge.Pool, id int64, did string) {
	b, ok := pool.Get(id)
	if !ok {
		log.Printf("id %d 不存在", id)
		return
	}

	ac, err := b.AC(did)
	if err != nil {
		log.Printf("设备 %s 不是空调: %v", did, err)
		return
	}

	// 读缓存
	state := ac.GetProps()
	fmt.Printf("[demo] 缓存: on=%v mode=%s target=%.1f current=%.1f\n",
		state.On, state.Mode, state.TargetTemperature, state.Temperature)

	// 云端刷新
	state2, err := ac.FetchProps(ctx)
	if err != nil {
		log.Printf("[demo] 云端刷新失败: %v", err)
		return
	}
	fmt.Printf("[demo] 云端: on=%v mode=%s target=%.1f current=%.1f\n",
		state2.On, state2.Mode, state2.TargetTemperature, state2.Temperature)

	// 控制
	ac.TurnOn(ctx)
	ac.SetMode(ctx, "cool")
	ac.SetTargetTemp(ctx, 26)
}