package api

import (
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"sort"
	"strconv"
	"strings"
	"sync"
	"time"

	"ai-status-light/internal/database"
	"ai-status-light/internal/logger"
	mqttcli "ai-status-light/internal/mqtt"
	"ai-status-light/internal/web"
)

type ClientStatus struct {
	Code      string `json:"code"`
	Timestamp string `json:"timestamp"`
}

type EventRequest struct {
	Code      string `json:"code"`
	Timestamp string `json:"timestamp,omitempty"`
}

type SSEClient struct {
	ch     chan string
	closed bool
	mu     sync.Mutex
}

type Server struct {
	db         *database.DB
	server     *http.Server
	sseClients map[*SSEClient]bool
	sseMu      sync.Mutex
	statusMap  map[int]*ClientStatus
	statusMu   sync.RWMutex
	certFile   string
	keyFile    string
	mqttClient *mqttcli.Client
	bleStdin   io.Writer
}

type Response struct {
	Code    int         `json:"code"`
	Message string      `json:"message"`
	Data    interface{} `json:"data,omitempty"`
}

func New(db *database.DB, addr string) *Server {
	s := &Server{
		db:         db,
		sseClients: make(map[*SSEClient]bool),
		statusMap:  make(map[int]*ClientStatus),
	}

	mux := http.NewServeMux()
	mux.HandleFunc("/api/clients", s.handleClients)
	mux.HandleFunc("/api/event", s.handleEvent)
	mux.HandleFunc("/api/events", s.handleSSE)
	mux.HandleFunc("/api/mqtt", s.handleMQTT)
	mux.HandleFunc("/api/mqtt/", s.handleMQTTByID)
	mux.HandleFunc("/api/ble", s.handleBLE)
	mux.HandleFunc("/api/ble/", s.handleBLEByID)
	mux.HandleFunc("/api/health", s.handleHealth)
	mux.HandleFunc("/api/device/config", s.handleDeviceConfig)
	mux.HandleFunc("/api/device/config/", s.handleDeviceConfigByID)
	mux.HandleFunc("/api/device/config/push", s.handleDeviceConfigPush)
	mux.HandleFunc("/", web.Handler())

	s.server = &http.Server{
		Addr:    addr,
		Handler: corsMiddleware(mux),
	}
	return s
}

func (s *Server) EnableTLS(certFile, keyFile string) {
	s.certFile = certFile
	s.keyFile = keyFile
}

func (s *Server) SetMQTTClient(client *mqttcli.Client) {
	s.mqttClient = client
}

func (s *Server) SetBLEStdin(stdin io.Writer) {
	s.bleStdin = stdin
}

func (s *Server) Start() error {
	if s.certFile != "" && s.keyFile != "" {
		logger.Info("API 服务器开始监听 (HTTPS): %s", s.server.Addr)
		err := s.server.ListenAndServeTLS(s.certFile, s.keyFile)
		if err != nil && err != http.ErrServerClosed {
			logger.Error("API 服务器监听失败: %v", err)
		}
		return err
	}
	logger.Info("API 服务器开始监听: %s", s.server.Addr)
	err := s.server.ListenAndServe()
	if err != nil && err != http.ErrServerClosed {
		logger.Error("API 服务器监听失败: %v", err)
	}
	return err
}

func corsMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.Header().Set("Access-Control-Allow-Origin", "*")
		w.Header().Set("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
		w.Header().Set("Access-Control-Allow-Headers", "Content-Type")

		if r.Method == "OPTIONS" {
			w.WriteHeader(http.StatusOK)
			return
		}

		next.ServeHTTP(w, r)
	})
}

func (s *Server) handleHealth(w http.ResponseWriter, r *http.Request) {
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok"})
}

func (s *Server) handleEvent(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
		return
	}

	var req EventRequest
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		logger.Warn("事件请求体解析失败: %v", err)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	if req.Code == "" {
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "code 不能为空"})
		return
	}

	logger.Info("收到事件: code=%s", req.Code)

	// 通过 MQTT 发送
	if s.mqttClient != nil {
		payload := map[string]interface{}{
			"code":      req.Code,
			"timestamp": time.Now().Format(time.RFC3339),
		}
		if err := s.mqttClient.PublishRaw(s.mqttClient.GetTopic(), payload); err != nil {
			logger.Error("MQTT 发送失败: %v", err)
		}
	}

	// 通过 BLE 发送
	if s.bleStdin != nil {
		msg := fmt.Sprintf(`{"code":"%s"}`+"\n", req.Code)
		if _, err := s.bleStdin.Write([]byte(msg)); err != nil {
			logger.Error("BLE 发送失败: %v", err)
		}
	}

	// 广播到 SSE 客户端
	s.broadcastSSE(req.Code)

	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok"})
}

func (s *Server) handleSSE(w http.ResponseWriter, r *http.Request) {
	flusher, ok := w.(http.Flusher)
	if !ok {
		http.Error(w, "SSE 不支持", http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "text/event-stream")
	w.Header().Set("Cache-Control", "no-cache")
	w.Header().Set("Connection", "keep-alive")
	w.Header().Set("Access-Control-Allow-Origin", "*")

	client := &SSEClient{
		ch: make(chan string, 10),
	}

	s.sseMu.Lock()
	s.sseClients[client] = true
	s.sseMu.Unlock()

	logger.Info("SSE 客户端已连接，当前连接数: %d", len(s.sseClients))

	defer func() {
		s.sseMu.Lock()
		delete(s.sseClients, client)
		s.sseMu.Unlock()
		client.Close()
		logger.Info("SSE 客户端已断开，当前连接数: %d", len(s.sseClients))
	}()

	// 发送初始连接消息
	fmt.Fprintf(w, "event: connected\ndata: {\"status\":\"ok\"}\n\n")
	flusher.Flush()

	ctx := r.Context()
	for {
		select {
		case <-ctx.Done():
			return
		case msg, ok := <-client.ch:
			if !ok {
				return
			}
			fmt.Fprintf(w, "event: status\ndata: %s\n\n", msg)
			flusher.Flush()
		}
	}
}

func (s *Server) broadcastSSE(code string) {
	ts := time.Now().Format(time.RFC3339)

	s.statusMu.Lock()
	s.statusMap[0] = &ClientStatus{
		Code:      code,
		Timestamp: ts,
	}
	s.statusMu.Unlock()

	s.sseMu.Lock()
	defer s.sseMu.Unlock()

	if len(s.sseClients) == 0 {
		return
	}

	payload := map[string]interface{}{
		"code":      code,
		"timestamp": ts,
	}

	data, err := json.Marshal(payload)
	if err != nil {
		logger.Error("序列化 SSE 消息失败: %v", err)
		return
	}

	msg := string(data)
	for client := range s.sseClients {
		client.Send(msg)
	}
}

func (c *SSEClient) Send(msg string) {
	c.mu.Lock()
	defer c.mu.Unlock()
	if c.closed {
		return
	}
	select {
	case c.ch <- msg:
	default:
		logger.Debug("SSE 客户端缓冲区已满，丢弃消息")
	}
}

func (c *SSEClient) Close() {
	c.mu.Lock()
	defer c.mu.Unlock()
	if !c.closed {
		c.closed = true
		close(c.ch)
	}
}

func (s *Server) handleClients(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodGet {
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
		return
	}

	s.statusMu.RLock()
	result := make([]*ClientStatus, 0, len(s.statusMap))
	for _, cs := range s.statusMap {
		result = append(result, cs)
	}
	s.statusMu.RUnlock()

	sort.Slice(result, func(i, j int) bool {
		return result[i].Code < result[j].Code
	})

	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "success", Data: result})
}

func (s *Server) handleMQTT(w http.ResponseWriter, r *http.Request) {
	logger.Debug("HTTP %s %s", r.Method, r.URL.Path)
	switch r.Method {
	case http.MethodGet:
		s.listMQTTConfigs(w, r)
	case http.MethodPost:
		s.createMQTTConfig(w, r)
	default:
		logger.Warn("不支持的 HTTP 方法: %s %s", r.Method, r.URL.Path)
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
	}
}

func (s *Server) handleMQTTByID(w http.ResponseWriter, r *http.Request) {
	logger.Debug("HTTP %s %s", r.Method, r.URL.Path)
	idStr := strings.TrimPrefix(r.URL.Path, "/api/mqtt/")
	id, err := strconv.Atoi(idStr)
	if err != nil {
		logger.Warn("无效的配置 ID: %s", idStr)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的 ID"})
		return
	}

	switch r.Method {
	case http.MethodGet:
		s.getMQTTConfig(w, id)
	case http.MethodPut:
		s.updateMQTTConfig(w, r, id)
	case http.MethodDelete:
		s.deleteMQTTConfig(w, id)
	default:
		logger.Warn("不支持的 HTTP 方法: %s %s", r.Method, r.URL.Path)
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
	}
}

func (s *Server) handleBLE(w http.ResponseWriter, r *http.Request) {
	logger.Debug("HTTP %s %s", r.Method, r.URL.Path)
	switch r.Method {
	case http.MethodGet:
		s.listBLEConfigs(w, r)
	case http.MethodPost:
		s.createBLEConfig(w, r)
	default:
		logger.Warn("不支持的 HTTP 方法: %s %s", r.Method, r.URL.Path)
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
	}
}

func (s *Server) handleBLEByID(w http.ResponseWriter, r *http.Request) {
	logger.Debug("HTTP %s %s", r.Method, r.URL.Path)
	idStr := strings.TrimPrefix(r.URL.Path, "/api/ble/")
	id, err := strconv.Atoi(idStr)
	if err != nil {
		logger.Warn("无效的配置 ID: %s", idStr)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的 ID"})
		return
	}

	switch r.Method {
	case http.MethodGet:
		s.getBLEConfig(w, id)
	case http.MethodPut:
		s.updateBLEConfig(w, r, id)
	case http.MethodDelete:
		s.deleteBLEConfig(w, id)
	default:
		logger.Warn("不支持的 HTTP 方法: %s %s", r.Method, r.URL.Path)
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
	}
}

func (s *Server) listMQTTConfigs(w http.ResponseWriter, r *http.Request) {
	configs, err := s.db.ListMQTTConfigs()
	if err != nil {
		logger.Error("查询 MQTT 配置列表失败: %v", err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}
	logger.Debug("查询 MQTT 配置列表: %d 条", len(configs))
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok", Data: configs})
}

func (s *Server) createMQTTConfig(w http.ResponseWriter, r *http.Request) {
	var cfg database.MQTTConfig
	if err := json.NewDecoder(r.Body).Decode(&cfg); err != nil {
		logger.Warn("创建配置请求体解析失败: %v", err)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	if cfg.Broker == "" {
		logger.Warn("创建配置: broker 为空")
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "broker 不能为空"})
		return
	}

	if cfg.ClientID == "" {
		cfg.ClientID = "opencode-monitor"
	}
	if cfg.Topic == "" {
		cfg.Topic = "opencode/status"
	}

	if err := s.db.SaveMQTTConfig(&cfg); err != nil {
		logger.Error("创建 MQTT 配置失败: %v", err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	logger.Info("MQTT 配置已创建: id=%d, broker=%s, topic=%s", cfg.ID, cfg.Broker, cfg.Topic)
	writeJSON(w, http.StatusCreated, Response{Code: 0, Message: "创建成功", Data: cfg})
}

func (s *Server) getMQTTConfig(w http.ResponseWriter, id int) {
	configs, err := s.db.ListMQTTConfigs()
	if err != nil {
		logger.Error("查询 MQTT 配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	for _, cfg := range configs {
		if cfg.ID == id {
			logger.Debug("查询 MQTT 配置: id=%d", id)
			writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok", Data: cfg})
			return
		}
	}

	logger.Warn("MQTT 配置不存在: id=%d", id)
	writeJSON(w, http.StatusNotFound, Response{Code: -1, Message: "配置不存在"})
}

func (s *Server) updateMQTTConfig(w http.ResponseWriter, r *http.Request, id int) {
	var cfg database.MQTTConfig
	if err := json.NewDecoder(r.Body).Decode(&cfg); err != nil {
		logger.Warn("更新配置请求体解析失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	cfg.ID = id
	if cfg.Broker == "" {
		logger.Warn("更新配置: broker 为空, id=%d", id)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "broker 不能为空"})
		return
	}

	if cfg.ClientID == "" {
		cfg.ClientID = "opencode-monitor"
	}
	if cfg.Topic == "" {
		cfg.Topic = "opencode/status"
	}

	if err := s.db.SaveMQTTConfig(&cfg); err != nil {
		logger.Error("更新 MQTT 配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	logger.Info("MQTT 配置已更新: id=%d, broker=%s, topic=%s", id, cfg.Broker, cfg.Topic)
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "更新成功", Data: cfg})
}

func (s *Server) deleteMQTTConfig(w http.ResponseWriter, id int) {
	if err := s.db.DeleteMQTTConfig(id); err != nil {
		logger.Error("删除 MQTT 配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}
	logger.Info("MQTT 配置已删除: id=%d", id)
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "删除成功"})
}

func (s *Server) listBLEConfigs(w http.ResponseWriter, r *http.Request) {
	configs, err := s.db.ListBLEConfigs()
	if err != nil {
		logger.Error("查询 BLE 配置列表失败: %v", err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}
	logger.Debug("查询 BLE 配置列表: %d 条", len(configs))
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok", Data: configs})
}

func (s *Server) createBLEConfig(w http.ResponseWriter, r *http.Request) {
	var cfg database.BLEConfig
	if err := json.NewDecoder(r.Body).Decode(&cfg); err != nil {
		logger.Warn("创建 BLE 配置请求体解析失败: %v", err)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	if cfg.DeviceName == "" || cfg.ServiceUUID == "" || cfg.ModeCharUUID == "" || cfg.ConfigCharUUID == "" {
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "device_name, service_uuid, mode_char_uuid, config_char_uuid 不能为空"})
		return
	}

	if err := s.db.SaveBLEConfig(&cfg); err != nil {
		logger.Error("创建 BLE 配置失败: %v", err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	logger.Info("BLE 配置已创建: id=%d, device=%s", cfg.ID, cfg.DeviceName)
	writeJSON(w, http.StatusCreated, Response{Code: 0, Message: "创建成功", Data: cfg})
}

func (s *Server) getBLEConfig(w http.ResponseWriter, id int) {
	configs, err := s.db.ListBLEConfigs()
	if err != nil {
		logger.Error("查询 BLE 配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	for _, cfg := range configs {
		if cfg.ID == id {
			logger.Debug("查询 BLE 配置: id=%d", id)
			writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok", Data: cfg})
			return
		}
	}

	logger.Warn("BLE 配置不存在: id=%d", id)
	writeJSON(w, http.StatusNotFound, Response{Code: -1, Message: "配置不存在"})
}

func (s *Server) updateBLEConfig(w http.ResponseWriter, r *http.Request, id int) {
	var cfg database.BLEConfig
	if err := json.NewDecoder(r.Body).Decode(&cfg); err != nil {
		logger.Warn("更新 BLE 配置请求体解析失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	cfg.ID = id

	if cfg.DeviceName == "" || cfg.ServiceUUID == "" || cfg.ModeCharUUID == "" || cfg.ConfigCharUUID == "" {
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "device_name, service_uuid, mode_char_uuid, config_char_uuid 不能为空"})
		return
	}

	if err := s.db.SaveBLEConfig(&cfg); err != nil {
		logger.Error("更新 BLE 配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	logger.Info("BLE 配置已更新: id=%d, device=%s", id, cfg.DeviceName)
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "更新成功", Data: cfg})
}

func (s *Server) deleteBLEConfig(w http.ResponseWriter, id int) {
	if err := s.db.DeleteBLEConfig(id); err != nil {
		logger.Error("删除 BLE 配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}
	logger.Info("BLE 配置已删除: id=%d", id)
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "删除成功"})
}

func writeJSON(w http.ResponseWriter, statusCode int, data interface{}) {
	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(statusCode)
	json.NewEncoder(w).Encode(data)
}

func (s *Server) GetAddr() string {
	return s.server.Addr
}

func (s *Server) handleDeviceConfig(w http.ResponseWriter, r *http.Request) {
	logger.Debug("HTTP %s %s", r.Method, r.URL.Path)
	switch r.Method {
	case http.MethodGet:
		s.listDeviceConfigs(w, r)
	case http.MethodPost:
		s.createDeviceConfig(w, r)
	default:
		logger.Warn("不支持的 HTTP 方法: %s %s", r.Method, r.URL.Path)
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
	}
}

func (s *Server) handleDeviceConfigByID(w http.ResponseWriter, r *http.Request) {
	logger.Debug("HTTP %s %s", r.Method, r.URL.Path)
	idStr := strings.TrimPrefix(r.URL.Path, "/api/device/config/")
	if idStr == "push" {
		s.handleDeviceConfigPush(w, r)
		return
	}
	id, err := strconv.Atoi(idStr)
	if err != nil {
		logger.Warn("无效的配置 ID: %s", idStr)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的 ID"})
		return
	}

	switch r.Method {
	case http.MethodGet:
		s.getDeviceConfig(w, id)
	case http.MethodPut:
		s.updateDeviceConfig(w, r, id)
	case http.MethodDelete:
		s.deleteDeviceConfig(w, id)
	default:
		logger.Warn("不支持的 HTTP 方法: %s %s", r.Method, r.URL.Path)
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
	}
}

func (s *Server) handleDeviceConfigPush(w http.ResponseWriter, r *http.Request) {
	if r.Method != http.MethodPost {
		writeJSON(w, http.StatusMethodNotAllowed, Response{Code: -1, Message: "方法不允许"})
		return
	}

	if s.mqttClient == nil {
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "MQTT 未连接"})
		return
	}

	var req struct {
		ID    int  `json:"id"`
		Reset bool `json:"reset,omitempty"`
	}
	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	configs, err := s.db.ListDeviceConfigs()
	if err != nil {
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	var targetCfg *database.DeviceConfig
	for _, cfg := range configs {
		if cfg.ID == req.ID {
			targetCfg = &cfg
			break
		}
	}

	if targetCfg == nil {
		writeJSON(w, http.StatusNotFound, Response{Code: -1, Message: "配置不存在"})
		return
	}

	payload := map[string]interface{}{}
	if targetCfg.WifiSSID != "" {
		payload["wifi_ssid"] = targetCfg.WifiSSID
	}
	if targetCfg.WifiPass != "" {
		payload["wifi_pass"] = targetCfg.WifiPass
	}
	if targetCfg.MqttBroker != "" {
		payload["mqtt_broker"] = targetCfg.MqttBroker
	}
	if targetCfg.MqttPort > 0 {
		payload["mqtt_port"] = targetCfg.MqttPort
	}
	if targetCfg.MqttUser != "" {
		payload["mqtt_user"] = targetCfg.MqttUser
	}
	if targetCfg.MqttPass != "" {
		payload["mqtt_pass"] = targetCfg.MqttPass
	}
	if targetCfg.MqttClient != "" {
		payload["mqtt_client"] = targetCfg.MqttClient
	}
	if targetCfg.MqttTopic != "" {
		payload["mqtt_topic"] = targetCfg.MqttTopic
	}
	if targetCfg.MqttStatus != "" {
		payload["mqtt_status"] = targetCfg.MqttStatus
	}
	if targetCfg.PinRed > 0 {
		payload["pin_red"] = targetCfg.PinRed
	}
	if targetCfg.PinGreen > 0 {
		payload["pin_green"] = targetCfg.PinGreen
	}
	if targetCfg.PinYellow > 0 {
		payload["pin_yellow"] = targetCfg.PinYellow
	}
	if req.Reset {
		payload["factory_reset"] = true
	}

	if err := s.mqttClient.PublishRaw(targetCfg.ConfigTopic, payload); err != nil {
		logger.Error("推送设备配置失败: %v", err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: "推送配置失败: " + err.Error()})
		return
	}

	logger.Info("设备配置已推送到 topic: %s", targetCfg.ConfigTopic)
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "配置已推送"})
}

func (s *Server) listDeviceConfigs(w http.ResponseWriter, r *http.Request) {
	configs, err := s.db.ListDeviceConfigs()
	if err != nil {
		logger.Error("查询设备配置列表失败: %v", err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}
	logger.Debug("查询设备配置列表: %d 条", len(configs))
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok", Data: configs})
}

func (s *Server) createDeviceConfig(w http.ResponseWriter, r *http.Request) {
	var cfg database.DeviceConfig
	if err := json.NewDecoder(r.Body).Decode(&cfg); err != nil {
		logger.Warn("创建设备配置请求体解析失败: %v", err)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	if cfg.DeviceName == "" {
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "device_name 不能为空"})
		return
	}

	if cfg.ConfigTopic == "" {
		cfg.ConfigTopic = "agent/status/config"
	}

	if err := s.db.SaveDeviceConfig(&cfg); err != nil {
		logger.Error("创建设备配置失败: %v", err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	logger.Info("设备配置已创建: id=%d, device=%s", cfg.ID, cfg.DeviceName)
	writeJSON(w, http.StatusCreated, Response{Code: 0, Message: "创建成功", Data: cfg})
}

func (s *Server) getDeviceConfig(w http.ResponseWriter, id int) {
	configs, err := s.db.ListDeviceConfigs()
	if err != nil {
		logger.Error("查询设备配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	for _, cfg := range configs {
		if cfg.ID == id {
			logger.Debug("查询设备配置: id=%d", id)
			writeJSON(w, http.StatusOK, Response{Code: 0, Message: "ok", Data: cfg})
			return
		}
	}

	logger.Warn("设备配置不存在: id=%d", id)
	writeJSON(w, http.StatusNotFound, Response{Code: -1, Message: "配置不存在"})
}

func (s *Server) updateDeviceConfig(w http.ResponseWriter, r *http.Request, id int) {
	var cfg database.DeviceConfig
	if err := json.NewDecoder(r.Body).Decode(&cfg); err != nil {
		logger.Warn("更新设备配置请求体解析失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "无效的请求体"})
		return
	}

	cfg.ID = id

	if cfg.DeviceName == "" {
		writeJSON(w, http.StatusBadRequest, Response{Code: -1, Message: "device_name 不能为空"})
		return
	}

	if cfg.ConfigTopic == "" {
		cfg.ConfigTopic = "agent/status/config"
	}

	if err := s.db.SaveDeviceConfig(&cfg); err != nil {
		logger.Error("更新设备配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}

	logger.Info("设备配置已更新: id=%d, device=%s", id, cfg.DeviceName)
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "更新成功", Data: cfg})
}

func (s *Server) deleteDeviceConfig(w http.ResponseWriter, id int) {
	if err := s.db.DeleteDeviceConfig(id); err != nil {
		logger.Error("删除设备配置失败: id=%d, %v", id, err)
		writeJSON(w, http.StatusInternalServerError, Response{Code: -1, Message: err.Error()})
		return
	}
	logger.Info("设备配置已删除: id=%d", id)
	writeJSON(w, http.StatusOK, Response{Code: 0, Message: "删除成功"})
}