// Package main demonstrates light device control - brightness, color temperature, RGB, and state subscription.
// 运行前提：已配置环境变量 XIAOMI_CLIENT_ID / XIAOMI_CLIENT_SECRET / XIAOMI_ACCESS_TOKEN。
package main

import (
	"context"
	"log"
	"time"

	"git.zeroonesoft.cn/golib/xiaomihome/xiaomi"
	"git.zeroonesoft.cn/golib/xiaomihome/xiaomi/devices"
	miotconfig "git.zeroonesoft.cn/golib/xiaomihome/miot/examples/config"
)

func main() {
	ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
	defer cancel()

	cfg, err := miotconfig.LoadConfig("../../../miot/examples/config.json")
	if err != nil {
		log.Fatal("请先运行 miot/examples/cloud_oauth 获取 token:", err)
	}

	client, err := xiaomi.NewClient(ctx, xiaomi.Config{
		AuthInfo: xiaomi.AuthInfo{
			AccessToken:  cfg.AuthInfo.AccessToken,
			RefreshToken: cfg.AuthInfo.RefreshToken,
			ExpiresIn:    int32(cfg.AuthInfo.ExpiresIn),
			ExpiresTS:    cfg.AuthInfo.ExpiresTS,
		},
		DataDir: "./data",
		UUID:    cfg.UUID,
		UID:     cfg.UID,
	})
	if err != nil {
		log.Fatal(err)
	}
	defer client.Close()

	const targetDID = "2169700407"

	info, err := client.GetDevice(ctx, targetDID)
	if err != nil {
		log.Fatalf("获取设备 %s 失败: %v", targetDID, err)
	}

	lt, err := devices.NewLight(client, info)
	if err != nil {
		log.Fatalf("创建 Light 失败: %v", err)
	}

	log.Printf("灯光: %s (DID: %s, 型号: %s)", info.Name, info.DID, info.Model)

	log.Println("开启灯光...")
	if err := lt.TurnOn(ctx); err != nil {
		log.Printf("开启失败: %v", err)
	}

	log.Println("设置亮度...")
	if err := lt.SetBrightness(ctx, 50); err != nil {
		log.Printf("设置亮度失败（可能不支持）: %v", err)
	}
	brightness, err := lt.GetBrightness(ctx)
	if err != nil {
		log.Printf("获取亮度失败: %v", err)
	} else {
		log.Printf("当前亮度: %d", brightness)
	}

	time.Sleep(1 * time.Second)

	log.Println("设置色温 4000K...")
	if err := lt.SetColorTemp(ctx, 4000); err != nil {
		log.Printf("设置色温失败（可能不支持）: %v", err)
	}
	colorTemp, err := lt.GetColorTemp(ctx)
	if err != nil {
		log.Printf("获取色温失败: %v", err)
	} else {
		log.Printf("当前色温: %dK", colorTemp)
	}

	time.Sleep(1 * time.Second)

	log.Println("设置颜色 R=255 G=100 B=50...")
	if err := lt.SetColor(ctx, 255, 100, 50); err != nil {
		log.Printf("设置颜色失败（可能不支持）: %v", err)
	}
	r, g, b, err := lt.GetColor(ctx)
	if err != nil {
		log.Printf("获取颜色失败: %v", err)
	} else {
		log.Printf("当前颜色: R=%d G=%d B=%d", r, g, b)
	}

	subID, err := lt.OnPropsChanged(func(props devices.LightProps, changed string) {
		log.Printf("灯光状态变化: %s → on=%v brightness=%d colorTemp=%dK rgb=[%d,%d,%d]",
			changed,
			props.On, props.Brightness, props.ColorTemperature,
			props.ColorRGB[0], props.ColorRGB[1], props.ColorRGB[2])
	})
	if err != nil {
		log.Printf("订阅状态失败: %v", err)
	} else {
		log.Printf("已订阅灯光状态: subID=%s", subID)
	}

	log.Println("执行 Toggle...")
	if err := lt.Toggle(ctx); err != nil {
		log.Printf("Toggle 失败: %v", err)
	}

	log.Println("灯光控制演示完毕")
}