package lc

import (
	"encoding/xml"
	"github.com/sirupsen/logrus"
	"io"
	"io/ioutil"
	"lc-smartX/lc/model"
	"lc-smartX/util"
	"lc-smartX/util/gopool"
	"log"
	"mime/multipart"
	"net/http"
	"strings"
	"time"
)

// 单摄像头服务器
func NewCameraEventServer() *CameraServer {
	camera := util.Config.Cameras[0] // 取第一个摄像头配置
	server := &CameraServer{
		Camera:   camera,
		Notifier: nil,
	}
	return server
}

type CameraServer struct {
	Camera   model.CameraInfo // 单个摄像头
	Notifier Notifier         // 单个回调
}

// 启动HTTP服务监听摄像头事件
func (s *CameraServer) Start() {
	http.HandleFunc(util.Config.Server.HikServer.Path, s.Handler)
	logrus.Fatalf("摄像头事件服务启动失败 %s: %v", util.Config.Server.HikServer.Addr,
		http.ListenAndServe(util.Config.Server.HikServer.Addr, nil))
}

// 注册回调
func (s *CameraServer) RegisterCallback(notifier Notifier) {
	s.Notifier = notifier
}

// 触发回调
func (s *CameraServer) Callback(text string) {
	if s.Notifier == nil {
		logrus.Error("摄像头回调未注册")
		return
	}
	s.Notifier.Notify(text, 1, 0)
	logrus.Debugf("摄像头 %s 触发事件", s.Camera.IP)
}

// HTTP请求处理（保持原有逻辑，适配单设备）
func (s *CameraServer) Handler(w http.ResponseWriter, r *http.Request) {
	gopool.Go(func() {
		w.WriteHeader(200)
		w.Header().Add("Date", time.Now().String())
		w.Header().Add("Connection", "keep-alive")
	})

	contentType := r.Header.Get("Content-Type")
	if strings.Contains(contentType, "application/xml") {
		bytes, err := io.ReadAll(r.Body)
		if err != nil {
			return
		}
		var event model.EventNotificationAlert
		if err := xml.Unmarshal(bytes, &event); err != nil {
			return
		}
		for _, v := range event.DetectionRegionList.DetectionRegionEntry {
			s.Callback(v.RegionID)
		}
	} else if strings.Contains(contentType, "multipart/form-data") {
		s.HandleMultipart(r)
	}
}

func (s *CameraServer) HandleMultipart(r *http.Request) {
	multipartReader := multipart.NewReader(r.Body, "boundary")
	var event model.EventNotificationAlert
	for {
		part, err := multipartReader.NextPart()
		if err == io.EOF {
			break
		}
		if err != nil {
			log.Println("读取multipart错误:", err)
			return
		}
		if part.FormName() != "linedetectionImage" || !strings.Contains(part.FormName(), "Image") {
			xmlData, err := ioutil.ReadAll(part)
			if err != nil {
				return
			}
			xml.Unmarshal(xmlData, &event)
			continue
		}
	}
	s.Callback("")
}