plugin.go

package m7s

import (
	"bytes"
	"context"
	"crypto/md5"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"net"
	"net/http"
	"net/url"
	"os"
	"path/filepath"
	"reflect"
	"runtime"
	"strconv"
	"strings"
	"time"

	"m7s.live/v5/pkg/task"

	"github.com/quic-go/quic-go"

	gatewayRuntime "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
	myip "github.com/husanpao/ip"
	"google.golang.org/grpc"
	"gopkg.in/yaml.v3"
	"gorm.io/gorm"
	. "m7s.live/v5/pkg"
	"m7s.live/v5/pkg/config"
	"m7s.live/v5/pkg/db"
	"m7s.live/v5/pkg/util"
)

type (
	DefaultYaml    string
	OnExitHandler  func()
	AuthPublisher  = func(*Publisher) *util.Promise
	AuthSubscriber = func(*Subscriber) *util.Promise

	PluginMeta struct {
		Name                string
		Version             string //插件版本
		Type                reflect.Type
		defaultYaml         DefaultYaml //默认配置
		ServiceDesc         *grpc.ServiceDesc
		RegisterGRPCHandler func(context.Context, *gatewayRuntime.ServeMux, *grpc.ClientConn) error
		Puller              Puller
		Pusher              Pusher
		Recorder            Recorder
		Transformer         Transformer
		OnExit              OnExitHandler
		OnAuthPub           AuthPublisher
		OnAuthSub           AuthSubscriber
	}

	iPlugin interface {
		nothing()
	}

	IPlugin interface {
		task.IJob
		OnInit() error
		OnStop()
		Pull(string, config.Pull, *config.Publish)
		Push(string, config.Push, *config.Subscribe)
		Transform(*Publisher, config.Transform)
		OnPublish(*Publisher)
	}

	IRegisterHandler interface {
		RegisterHandler() map[string]http.HandlerFunc
	}

	IPullerPlugin interface {
		GetPullableList() []string
	}

	ITCPPlugin interface {
		OnTCPConnect(conn *net.TCPConn) task.ITask
	}

	IUDPPlugin interface {
		OnUDPConnect(conn *net.UDPConn) task.ITask
	}

	IQUICPlugin interface {
		OnQUICConnect(quic.Connection) task.ITask
	}
	IPullProxyPlugin interface {
		OnPullProxyAdd(pullProxy *PullProxy) any
	}
	IPushProxyPlugin interface {
		OnPushProxyAdd(pushProxy *PushProxy) any
	}
)

var plugins []PluginMeta

func (plugin *PluginMeta) Init(s *Server, userConfig map[string]any) (p *Plugin) {
	instance, ok := reflect.New(plugin.Type).Interface().(IPlugin)
	if !ok {
		panic("plugin must implement IPlugin")
	}
	p = reflect.ValueOf(instance).Elem().FieldByName("Plugin").Addr().Interface().(*Plugin)
	p.handler = instance
	p.Meta = plugin
	p.Server = s
	p.Logger = s.Logger.With("plugin", plugin.Name)
	upperName := strings.ToUpper(plugin.Name)
	if os.Getenv(upperName+"_ENABLE") == "false" {
		p.disable("env")
		p.Warn("disabled by env")
		return
	}
	p.Config.Parse(p.GetCommonConf(), upperName)
	p.Config.Parse(instance, upperName)
	for _, fname := range MergeConfigs {
		if name := strings.ToLower(fname); p.Config.Has(name) {
			p.Config.Get(name).ParseGlobal(s.Config.Get(name))
		}
	}
	if plugin.defaultYaml != "" {
		var defaultConf map[string]any
		if err := yaml.Unmarshal([]byte(plugin.defaultYaml), &defaultConf); err != nil {
			p.Error("parsing default config", "error", err)
		} else {
			p.Config.ParseDefaultYaml(defaultConf)
		}
	}
	p.Config.ParseUserFile(userConfig)
	p.SetDescription("version", plugin.Version)
	if userConfig != nil {
		p.SetDescription("userConfig", userConfig)
	}
	finalConfig, _ := yaml.Marshal(p.Config.GetMap())
	p.Logger.Handler().(*MultiLogHandler).SetLevel(ParseLevel(p.config.LogLevel))
	p.Debug("config", "detail", string(finalConfig))
	if s.DisableAll {
		p.Disabled = true
	}
	if userConfig["enable"] == false {
		p.Disabled = true
	} else if userConfig["enable"] == true {
		p.Disabled = false
	}
	if p.Disabled {
		p.disable("config")
		p.Warn("plugin disabled")
		return
	} else {
		p.assign()
	}
	p.Info("init", "version", plugin.Version)
	var err error
	if p.config.DSN == s.GetCommonConf().DSN {
		p.DB = s.DB
	} else if p.config.DSN != "" {
		if factory, ok := db.Factory[p.config.DBType]; ok {
			s.DB, err = gorm.Open(factory(p.config.DSN), &gorm.Config{})
			if err != nil {
				s.Error("failed to connect database", "error", err, "dsn", s.config.DSN, "type", s.config.DBType)
				p.disable(fmt.Sprintf("database %v", err))
				return
			}
		}
	}
	if p.DB != nil && p.Meta.Recorder != nil {
		if err = p.DB.AutoMigrate(&RecordStream{}); err != nil {
			p.disable(fmt.Sprintf("auto migrate record stream failed %v", err))
			return
		}
	}
	s.AddTask(instance)
	return
}

// InstallPlugin 安装插件
func InstallPlugin[C iPlugin](options ...any) error {
	var c *C
	t := reflect.TypeOf(c).Elem()
	meta := PluginMeta{
		Name: strings.TrimSuffix(t.Name(), "Plugin"),
		Type: t,
	}

	_, pluginFilePath, _, _ := runtime.Caller(1)
	configDir := filepath.Dir(pluginFilePath)

	if _, after, found := strings.Cut(configDir, "@"); found {
		meta.Version = after
	} else {
		meta.Version = "dev"
	}
	for _, option := range options {
		switch v := option.(type) {
		case OnExitHandler:
			meta.OnExit = v
		case DefaultYaml:
			meta.defaultYaml = v
		case Puller:
			meta.Puller = v
		case Pusher:
			meta.Pusher = v
		case Recorder:
			meta.Recorder = v
		case Transformer:
			meta.Transformer = v
		case AuthPublisher:
			meta.OnAuthPub = v
		case AuthSubscriber:
			meta.OnAuthSub = v
		case *grpc.ServiceDesc:
			meta.ServiceDesc = v
		case func(context.Context, *gatewayRuntime.ServeMux, *grpc.ClientConn) error:
			meta.RegisterGRPCHandler = v
		}
	}
	plugins = append(plugins, meta)
	return nil
}

var _ IPlugin = (*Plugin)(nil)

type Plugin struct {
	task.Work
	config.Config
	Disabled           bool
	Meta               *PluginMeta
	PushAddr, PlayAddr []string
	config             config.Common
	handler            IPlugin
	Server             *Server
	DB                 *gorm.DB
}

func (Plugin) nothing() {

}

func (p *Plugin) GetKey() string {
	return p.Meta.Name
}

func (p *Plugin) GetGlobalCommonConf() *config.Common {
	return p.Server.GetCommonConf()
}

func (p *Plugin) GetCommonConf() *config.Common {
	return &p.config
}

func (p *Plugin) GetHandler() IPlugin {
	return p.handler
}

func (p *Plugin) GetPublicIP(netcardIP string) string {
	if p.config.PublicIP != "" {
		return p.config.PublicIP
	}
	if publicIP := util.GetPublicIP(netcardIP); publicIP != netcardIP {
		return publicIP
	}
	localIp := myip.InternalIPv4()
	if publicIP := util.GetPublicIP(localIp); publicIP != localIp {
		return publicIP
	}
	return localIp
}

func (p *Plugin) settingPath() string {
	return filepath.Join(p.Server.SettingDir, strings.ToLower(p.Meta.Name)+".yaml")
}

func (p *Plugin) disable(reason string) {
	p.Disabled = true
	p.SetDescription("disableReason", reason)
	p.Server.disabledPlugins = append(p.Server.disabledPlugins, p)
}

func (p *Plugin) assign() {
	f, err := os.Open(p.settingPath())
	defer f.Close()
	if err == nil {
		var modifyConfig map[string]any
		err = yaml.NewDecoder(f).Decode(&modifyConfig)
		if err != nil {
			panic(err)
		}
		p.Config.ParseModifyFile(modifyConfig)
	}
	var handlerMap map[string]http.HandlerFunc
	if v, ok := p.handler.(IRegisterHandler); ok {
		handlerMap = v.RegisterHandler()
	}
	p.registerHandler(handlerMap)
}

func (p *Plugin) Start() (err error) {
	s := p.Server
	if p.Meta.ServiceDesc != nil && s.grpcServer != nil {
		s.grpcServer.RegisterService(p.Meta.ServiceDesc, p.handler)
		if p.Meta.RegisterGRPCHandler != nil {
			if err = p.Meta.RegisterGRPCHandler(p.Context, s.config.HTTP.GetGRPCMux(), s.grpcClientConn); err != nil {
				p.disable(fmt.Sprintf("grpc %v", err))
				return
			} else {
				p.Info("grpc handler registered")
			}
		}
	}
	s.Plugins.Add(p)
	if err = p.listen(); err != nil {
		p.disable(fmt.Sprintf("listen %v", err))
		return
	}
	if err = p.handler.OnInit(); err != nil {
		p.disable(fmt.Sprintf("init %v", err))
		return
	}
	if p.config.Hook != nil {
		if hook, ok := p.config.Hook[config.HookOnServerKeepAlive]; ok && hook.Interval > 0 {
			p.AddTask(&ServerKeepAliveTask{plugin: p})
		}
	}
	return
}

func (p *Plugin) Dispose() {
	p.handler.OnStop()
	p.Server.Plugins.Remove(p)
}

func (p *Plugin) listen() (err error) {
	httpConf := &p.config.HTTP

	if httpConf.ListenAddrTLS != "" && (httpConf.ListenAddrTLS != p.Server.config.HTTP.ListenAddrTLS) {
		p.SetDescription("httpTLS", strings.TrimPrefix(httpConf.ListenAddrTLS, ":"))
		p.AddDependTask(httpConf.CreateHTTPSWork(p.Logger))
	}

	if httpConf.ListenAddr != "" && (httpConf.ListenAddr != p.Server.config.HTTP.ListenAddr) {
		p.SetDescription("http", strings.TrimPrefix(httpConf.ListenAddr, ":"))
		p.AddDependTask(httpConf.CreateHTTPWork(p.Logger))
	}

	if tcphandler, ok := p.handler.(ITCPPlugin); ok {
		tcpConf := &p.config.TCP
		if tcpConf.ListenAddr != "" {
			if tcpConf.AutoListen {
				if err = p.AddTask(tcpConf.CreateTCPWork(p.Logger, tcphandler.OnTCPConnect)).WaitStarted(); err != nil {
					return
				}
			}
			p.SetDescription("tcp", strings.TrimPrefix(tcpConf.ListenAddr, ":"))
		}
		if tcpConf.ListenAddrTLS != "" {
			if tcpConf.AutoListen {
				if err = p.AddTask(tcpConf.CreateTCPTLSWork(p.Logger, tcphandler.OnTCPConnect)).WaitStarted(); err != nil {
					return
				}
			}
			p.SetDescription("tcpTLS", strings.TrimPrefix(tcpConf.ListenAddrTLS, ":"))
		}
	}

	if udpHandler, ok := p.handler.(IUDPPlugin); ok {
		udpConf := &p.config.UDP
		if udpConf.ListenAddr != "" {
			if udpConf.AutoListen {
				if err = p.AddTask(udpConf.CreateUDPWork(p.Logger, udpHandler.OnUDPConnect)).WaitStarted(); err != nil {
					return
				}
			}
			p.SetDescription("udp", strings.TrimPrefix(udpConf.ListenAddr, ":"))
		}
	}

	if quicHandler, ok := p.handler.(IQUICPlugin); ok {
		quicConf := &p.config.Quic
		if quicConf.ListenAddr != "" {
			if quicConf.AutoListen {
				if err = p.AddTask(quicConf.CreateQUICWork(p.Logger, quicHandler.OnQUICConnect)).WaitStarted(); err != nil {
					return
				}
			}
			p.SetDescription("quic", strings.TrimPrefix(quicConf.ListenAddr, ":"))
		}
	}
	return
}

func (p *Plugin) OnInit() error {
	return nil
}

func (p *Plugin) OnStop() {

}

type WebHookTask struct {
	task.Task
	plugin   *Plugin
	hookType config.HookType
	conf     *config.Webhook
	data     any
	jsonData []byte
}

func (t *WebHookTask) Start() error {
	if t.conf == nil || t.conf.URL == "" {
		return task.ErrTaskComplete
	}

	var err error
	t.jsonData, err = json.Marshal(t.data)
	if err != nil {
		return fmt.Errorf("marshal webhook data: %w", err)
	}

	t.SetRetry(t.conf.RetryTimes, t.conf.RetryInterval)
	return nil
}

func (t *WebHookTask) Run() error {
	req, err := http.NewRequest(t.conf.Method, t.conf.URL, bytes.NewBuffer(t.jsonData))
	if err != nil {
		return err
	}

	req.Header.Set("Content-Type", "application/json")
	for k, v := range t.conf.Headers {
		req.Header.Set(k, v)
	}

	client := &http.Client{
		Timeout: time.Duration(t.conf.TimeoutSeconds) * time.Second,
	}

	resp, err := client.Do(req)
	if err != nil {
		t.plugin.Error("webhook request failed", "error", err)
		return err
	}
	defer resp.Body.Close()

	if resp.StatusCode >= 200 && resp.StatusCode < 300 {
		return task.ErrTaskComplete
	}

	err = fmt.Errorf("webhook request failed with status: %d", resp.StatusCode)
	t.plugin.Error("webhook response error", "status", resp.StatusCode)
	return err
}

func (p *Plugin) SendWebhook(hookType config.HookType, conf config.Webhook, data any) *task.Task {
	webhookTask := &WebHookTask{
		plugin:   p,
		hookType: hookType,
		conf:     &conf,
		data:     data,
	}
	return p.AddTask(webhookTask)
}

// TODO: use alias stream
func (p *Plugin) OnPublish(pub *Publisher) {
	onPublish := p.config.OnPub
	if p.Meta.Pusher != nil {
		for r, pushConf := range onPublish.Push {
			if pushConf.URL = r.Replace(pub.StreamPath, pushConf.URL); pushConf.URL != "" {
				p.Push(pub.StreamPath, pushConf, nil)
			}
		}
	}
	if p.Meta.Recorder != nil {
		for r, recConf := range onPublish.Record {
			if recConf.FilePath = r.Replace(pub.StreamPath, recConf.FilePath); recConf.FilePath != "" {
				p.Record(pub, recConf, nil)
			}
		}
	}
	var owner = pub.Value(Owner)
	var isTransformer bool
	if owner != nil {
		_, isTransformer = owner.(ITransformer)
	}
	if p.Meta.Transformer != nil && !isTransformer {
		for r, tranConf := range onPublish.Transform {
			if group := r.FindStringSubmatch(pub.StreamPath); group != nil {
				for j, to := range tranConf.Output {
					for i, g := range group {
						to.Target = strings.ReplaceAll(to.Target, fmt.Sprintf("$%d", i), g)
					}
					targetUrl, err := url.Parse(to.Target)
					if err == nil {
						to.StreamPath = strings.TrimPrefix(targetUrl.Path, "/")
					}
					tranConf.Output[j] = to
				}
				p.Transform(pub, tranConf)
			}
		}
	}
}

func (p *Plugin) auth(streamPath string, key string, secret string, expire string) (err error) {
	if unixTime, err := strconv.ParseInt(expire, 16, 64); err != nil || time.Now().Unix() > unixTime {
		return fmt.Errorf("auth failed expired")
	}
	if len(secret) != 32 {
		return fmt.Errorf("auth failed secret length must be 32")
	}
	trueSecret := md5.Sum([]byte(key + streamPath + expire))
	if secret == hex.EncodeToString(trueSecret[:]) {
		return nil
	}
	return fmt.Errorf("auth failed invalid secret")
}

func (p *Plugin) OnSubscribe(streamPath string, args url.Values) {
	//	var avoidTrans bool
	//AVOID:
	//	for trans := range server.Transforms.Range {
	//		for _, output := range trans.Config.Output {
	//			if output.StreamPath == s.StreamPath {
	//				avoidTrans = true
	//				break AVOID
	//			}
	//		}
	//	}
	for reg, conf := range p.config.OnSub.Pull {
		if p.Meta.Puller != nil && reg.MatchString(streamPath) {
			conf.Args = config.HTTPValues(args)
			conf.URL = reg.Replace(streamPath, conf.URL)
			p.handler.Pull(streamPath, conf, nil)
		}
	}

	//if !avoidTrans {
	//	for reg, conf := range plugin.GetCommonConf().OnSub.Transform {
	//		if plugin.Meta.Transformer != nil {
	//			if reg.MatchString(s.StreamPath) {
	//				if group := reg.FindStringSubmatch(s.StreamPath); group != nil {
	//					for j, c := range conf.Output {
	//						for i, value := range group {
	//							c.Target = strings.Replace(c.Target, fmt.Sprintf("$%d", i), value, -1)
	//						}
	//						conf.Output[j] = c
	//					}
	//				}
	//				plugin.handler.Transform(s.StreamPath, conf)
	//			}
	//		}
	//	}
	//}
}
func (p *Plugin) PublishWithConfig(ctx context.Context, streamPath string, conf config.Publish) (publisher *Publisher, err error) {
	publisher = createPublisher(p, streamPath, conf)
	if p.config.EnableAuth && publisher.Type == PublishTypeServer {
		onAuthPub := p.Meta.OnAuthPub
		if onAuthPub == nil {
			onAuthPub = p.Server.Meta.OnAuthPub
		}
		if onAuthPub != nil {
			if err = onAuthPub(publisher).Await(); err != nil {
				p.Warn("auth failed", "error", err)
				return
			}
		} else if conf.Key != "" {
			if err = p.auth(publisher.StreamPath, conf.Key, publisher.Args.Get("secret"), publisher.Args.Get("expire")); err != nil {
				p.Warn("auth failed", "error", err)
				return
			}
		}
	}
	err = p.Server.Streams.AddTask(publisher, ctx).WaitStarted()
	if err == nil {
		publisher.OnDispose(func() {
			p.sendPublishEndWebhook(publisher)
		})
		p.sendPublishWebhook(publisher)
	}
	return
}

func (p *Plugin) Publish(ctx context.Context, streamPath string) (publisher *Publisher, err error) {
	return p.PublishWithConfig(ctx, streamPath, p.config.Publish)
}

func (p *Plugin) SubscribeWithConfig(ctx context.Context, streamPath string, conf config.Subscribe) (subscriber *Subscriber, err error) {
	subscriber = createSubscriber(p, streamPath, conf)
	if p.config.EnableAuth && subscriber.Type == SubscribeTypeServer {
		onAuthSub := p.Meta.OnAuthSub
		if onAuthSub == nil {
			onAuthSub = p.Server.Meta.OnAuthSub
		}
		if onAuthSub != nil {
			if err = onAuthSub(subscriber).Await(); err != nil {
				p.Warn("auth failed", "error", err)
				return
			}
		} else if conf.Key != "" {
			if err = p.auth(subscriber.StreamPath, conf.Key, subscriber.Args.Get("secret"), subscriber.Args.Get("expire")); err != nil {
				p.Warn("auth failed", "error", err)
				return
			}
		}
	}
	err = p.Server.Streams.AddTask(subscriber, ctx).WaitStarted()
	if err == nil {
		select {
		case <-subscriber.waitPublishDone:
			err = subscriber.Publisher.WaitTrack()
		case <-subscriber.Done():
			err = subscriber.StopReason()
		}
	}
	if err == nil {
		subscriber.OnDispose(func() {
			p.sendSubscribeEndWebhook(subscriber)
		})
		p.sendSubscribeWebhook(subscriber)
	}
	return
}

func (p *Plugin) Subscribe(ctx context.Context, streamPath string) (subscriber *Subscriber, err error) {
	return p.SubscribeWithConfig(ctx, streamPath, p.config.Subscribe)
}

func (p *Plugin) Pull(streamPath string, conf config.Pull, pubConf *config.Publish) {
	puller := p.Meta.Puller(conf)
	if puller == nil {
		return
	}
	puller.GetPullJob().Init(puller, p, streamPath, conf, pubConf)
}

func (p *Plugin) Push(streamPath string, conf config.Push, subConf *config.Subscribe) {
	pusher := p.Meta.Pusher()
	pusher.GetPushJob().Init(pusher, p, streamPath, conf, subConf)
}

func (p *Plugin) Record(pub *Publisher, conf config.Record, subConf *config.Subscribe) *RecordJob {
	recorder := p.Meta.Recorder(conf)
	job := recorder.GetRecordJob().Init(recorder, p, pub.StreamPath, conf, subConf)
	job.Depend(pub)
	return job
}

func (p *Plugin) Transform(pub *Publisher, conf config.Transform) {
	transformer := p.Meta.Transformer()
	job := transformer.GetTransformJob().Init(transformer, p, pub.StreamPath, conf)
	job.Depend(pub)
}

func (p *Plugin) registerHandler(handlers map[string]http.HandlerFunc) {
	t := reflect.TypeOf(p.handler)
	v := reflect.ValueOf(p.handler)
	// 注册http响应
	for i, j := 0, t.NumMethod(); i < j; i++ {
		name := t.Method(i).Name
		if name == "ServeHTTP" {
			continue
		}
		switch handler := v.Method(i).Interface().(type) {
		case func(http.ResponseWriter, *http.Request):
			patten := strings.ToLower(strings.ReplaceAll(name, "_", "/"))
			p.handle(patten, http.HandlerFunc(handler))
		}
	}
	for patten, handler := range handlers {
		p.handle(patten, handler)
	}
	if p.config.EnableAuth && p.Server.ServerConfig.Admin.EnableLogin {
		p.handle("/api/secret/{type}/{streamPath...}", http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
			authHeader := r.Header.Get("Authorization")
			if authHeader == "" {
				http.Error(rw, "missing authorization header", http.StatusUnauthorized)
				return
			}

			tokenString := strings.TrimPrefix(authHeader, "Bearer ")
			_, err := p.Server.ValidateToken(tokenString)
			if err != nil {
				http.Error(rw, "invalid token", http.StatusUnauthorized)
				return
			}
			streamPath := r.PathValue("streamPath")
			t := r.PathValue("type")
			expire := r.URL.Query().Get("expire")
			if t == "publish" {
				secret := md5.Sum([]byte(p.config.Publish.Key + streamPath + expire))
				rw.Write([]byte(hex.EncodeToString(secret[:])))
			} else if t == "subscribe" {
				secret := md5.Sum([]byte(p.config.Subscribe.Key + streamPath + expire))
				rw.Write([]byte(hex.EncodeToString(secret[:])))
			}
		}))
	}
	if rootHandler, ok := p.handler.(http.Handler); ok {
		p.handle("/", rootHandler)
	}
}

func (p *Plugin) logHandler(handler http.Handler) http.Handler {
	return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
		p.Debug("visit", "path", r.URL.String(), "remote", r.RemoteAddr)
		name := strings.ToLower(p.Meta.Name)
		r.URL.Path = strings.TrimPrefix(r.URL.Path, "/"+name)
		handler.ServeHTTP(rw, r)
	})
}

func (p *Plugin) handle(pattern string, handler http.Handler) {
	if p == nil {
		return
	}
	last := pattern == "/"
	if !strings.HasPrefix(pattern, "/") {
		pattern = "/" + pattern
	}
	handler = p.logHandler(handler)
	p.config.HTTP.Handle(pattern, handler, last)
	if p.Server != p.handler {
		pattern = "/" + strings.ToLower(p.Meta.Name) + pattern
		p.Debug("http handle added to Server", "pattern", pattern)
		p.Server.config.HTTP.Handle(pattern, handler, last)
	}
	p.Server.apiList = append(p.Server.apiList, pattern)
}

func (p *Plugin) SaveConfig() (err error) {
	return Servers.AddTask(&SaveConfig{Plugin: p}).WaitStopped()
}

type SaveConfig struct {
	task.Task
	Plugin *Plugin
	file   *os.File
}

func (s *SaveConfig) Start() (err error) {
	if s.Plugin.Modify == nil {
		err = os.Remove(s.Plugin.settingPath())
		if err == nil {
			err = task.ErrTaskComplete
		}
	}
	s.file, err = os.OpenFile(s.Plugin.settingPath(), os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0666)
	return
}

func (s *SaveConfig) Run() (err error) {
	return yaml.NewEncoder(s.file).Encode(s.Plugin.Modify)
}

func (s *SaveConfig) Dispose() {
	s.file.Close()
}

func (p *Plugin) sendPublishWebhook(pub *Publisher) {
	if p.config.Hook == nil {
		return
	}
	webhookData := map[string]interface{}{
		"event":      "publish",
		"streamPath": pub.StreamPath,
		"args":       pub.Args,
		"publishId":  pub.ID,
		"remoteAddr": pub.RemoteAddr,
		"type":       pub.Type,
		"pluginName": p.Meta.Name,
		"timestamp":  time.Now().Unix(),
	}
	p.SendWebhook(config.HookOnPublish, p.config.Hook[config.HookOnPublish], webhookData)
	if p.Server.config.Hook == nil {
		return
	}
	p.Server.SendWebhook(config.HookOnPublish, p.Server.config.Hook[config.HookOnPublish], webhookData)
}

func (p *Plugin) sendPublishEndWebhook(pub *Publisher) {
	if p.config.Hook == nil {
		return
	}
	webhookData := map[string]interface{}{
		"event":      "publish_end",
		"streamPath": pub.StreamPath,
		"publishId":  pub.ID,
		"reason":     pub.StopReason().Error(),
		"timestamp":  time.Now().Unix(),
	}
	p.SendWebhook(config.HookOnPublishEnd, p.config.Hook[config.HookOnPublishEnd], webhookData)
}

func (p *Plugin) sendSubscribeWebhook(sub *Subscriber) {
	if p.config.Hook == nil {
		return
	}
	webhookData := map[string]interface{}{
		"event":        "subscribe",
		"streamPath":   sub.StreamPath,
		"publishId":    sub.Publisher.ID,
		"subscriberId": sub.ID,
		"remoteAddr":   sub.RemoteAddr,
		"type":         sub.Type,
		"args":         sub.Args,
		"timestamp":    time.Now().Unix(),
	}
	p.SendWebhook(config.HookOnSubscribe, p.config.Hook[config.HookOnSubscribe], webhookData)
}

func (p *Plugin) sendSubscribeEndWebhook(sub *Subscriber) {
	if p.config.Hook == nil {
		return
	}
	webhookData := map[string]interface{}{
		"event":        "subscribe_end",
		"streamPath":   sub.StreamPath,
		"subscriberId": sub.ID,
		"reason":       sub.StopReason().Error(),
		"timestamp":    time.Now().Unix(),
	}
	if sub.Publisher != nil {
		webhookData["publishId"] = sub.Publisher.ID
	}
	p.SendWebhook(config.HookOnSubscribeEnd, p.config.Hook[config.HookOnSubscribeEnd], webhookData)
}

func (p *Plugin) sendServerKeepAliveWebhook() {
	if p.config.Hook == nil {
		return
	}
	s := p.Server
	webhookData := map[string]interface{}{
		"event":           "server_keep_alive",
		"timestamp":       time.Now().Unix(),
		"streams":         s.Streams.Length,
		"subscribers":     s.Subscribers.Length,
		"publisherCount":  s.Streams.Length,
		"subscriberCount": s.Subscribers.Length,
		"uptime":          time.Since(s.StartTime).Seconds(),
	}
	p.SendWebhook(config.HookOnServerKeepAlive, p.config.Hook[config.HookOnServerKeepAlive], webhookData)
}

type ServerKeepAliveTask struct {
	task.TickTask
	plugin *Plugin
}

func (t *ServerKeepAliveTask) GetTickInterval() time.Duration {
	return time.Duration(t.plugin.config.Hook[config.HookOnServerKeepAlive].Interval) * time.Second
}

func (t *ServerKeepAliveTask) Tick(now any) {
	t.plugin.sendServerKeepAliveWebhook()
}