// Package core contains the main struct of the software.
package core

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"path/filepath"
	"reflect"
	"sort"
	"strings"
	"time"

	"github.com/alecthomas/kong"
	"github.com/bluenviron/gortsplib/v4"
	"github.com/gin-gonic/gin"

	"github.com/bluenviron/mediamtx/internal/conf"
	"github.com/bluenviron/mediamtx/internal/confwatcher"
	"github.com/bluenviron/mediamtx/internal/externalcmd"
	"github.com/bluenviron/mediamtx/internal/logger"
	"github.com/bluenviron/mediamtx/internal/record"
	"github.com/bluenviron/mediamtx/internal/rlimit"
)

var version = "v0.0.0"

var defaultConfPaths = []string{
	"rtsp-simple-server.yml",
	"mediamtx.yml",
	"/usr/local/etc/mediamtx.yml",
	"/usr/etc/mediamtx.yml",
	"/etc/mediamtx/mediamtx.yml",
}

func gatherCleanerEntries(paths map[string]*conf.Path) []record.CleanerEntry {
	out := make(map[record.CleanerEntry]struct{})

	for _, pa := range paths {
		if pa.Record && pa.RecordDeleteAfter != 0 {
			entry := record.CleanerEntry{
				PathFormat:  pa.RecordPath,
				Format:      pa.RecordFormat,
				DeleteAfter: time.Duration(pa.RecordDeleteAfter),
			}
			out[entry] = struct{}{}
		}
	}

	out2 := make([]record.CleanerEntry, len(out))
	i := 0

	for v := range out {
		out2[i] = v
		i++
	}

	sort.Slice(out2, func(i, j int) bool {
		if out2[i].PathFormat != out2[j].PathFormat {
			return out2[i].PathFormat < out2[j].PathFormat
		}
		return out2[i].DeleteAfter < out2[j].DeleteAfter
	})

	return out2
}

var cli struct {
	Version  bool   `help:"print version"`
	Confpath string `arg:"" default:""`
}

// Core is an instance of MediaMTX.
type Core struct {
	ctx             context.Context
	ctxCancel       func()
	confPath        string
	conf            *conf.Conf
	logger          *logger.Logger
	externalCmdPool *externalcmd.Pool
	metrics         *metrics
	pprof           *pprof
	recordCleaner   *record.Cleaner
	pathManager     *pathManager
	rtspServer      *rtspServer
	rtspsServer     *rtspServer
	rtmpServer      *rtmpServer
	rtmpsServer     *rtmpServer
	hlsManager      *hlsManager
	webRTCManager   *webRTCManager
	srtServer       *srtServer
	api             *api
	confWatcher     *confwatcher.ConfWatcher

	// in
	chAPIConfigSet chan *conf.Conf

	// out
	done chan struct{}
}

// New allocates a Core.
func New(args []string) (*Core, bool) {
	parser, err := kong.New(&cli,
		kong.Description("MediaMTX "+version),
		kong.UsageOnError(),
		kong.ValueFormatter(func(value *kong.Value) string {
			switch value.Name {
			case "confpath":
				return "path to a config file. The default is mediamtx.yml."

			default:
				return kong.DefaultHelpValueFormatter(value)
			}
		}))
	if err != nil {
		panic(err)
	}

	_, err = parser.Parse(args)
	parser.FatalIfErrorf(err)

	if cli.Version {
		fmt.Println(version)
		os.Exit(0)
	}

	ctx, ctxCancel := context.WithCancel(context.Background())

	p := &Core{
		ctx:            ctx,
		ctxCancel:      ctxCancel,
		chAPIConfigSet: make(chan *conf.Conf),
		done:           make(chan struct{}),
	}

	p.conf, p.confPath, err = conf.Load(cli.Confpath, defaultConfPaths)
	if err != nil {
		fmt.Printf("ERR: %s\n", err)
		return nil, false
	}

	err = p.createResources(true)
	if err != nil {
		if p.logger != nil {
			p.Log(logger.Error, "%s", err)
		} else {
			fmt.Printf("ERR: %s\n", err)
		}
		p.closeResources(nil, false)
		return nil, false
	}

	go p.run()

	return p, true
}

// Close closes Core and waits for all goroutines to return.
func (p *Core) Close() {
	p.ctxCancel()
	<-p.done
}

// Wait waits for the Core to exit.
func (p *Core) Wait() {
	<-p.done
}

// Log is the main logging function.
func (p *Core) Log(level logger.Level, format string, args ...interface{}) {
	p.logger.Log(level, format, args...)
}

func (p *Core) run() {
	defer close(p.done)

	confChanged := func() chan struct{} {
		if p.confWatcher != nil {
			return p.confWatcher.Watch()
		}
		return make(chan struct{})
	}()

	interrupt := make(chan os.Signal, 1)
	signal.Notify(interrupt, os.Interrupt)

outer:
	for {
		select {
		case <-confChanged:
			p.Log(logger.Info, "reloading configuration (file changed)")

			newConf, _, err := conf.Load(p.confPath, nil)
			if err != nil {
				p.Log(logger.Error, "%s", err)
				break outer
			}

			err = p.reloadConf(newConf, false)
			if err != nil {
				p.Log(logger.Error, "%s", err)
				break outer
			}

		case newConf := <-p.chAPIConfigSet:
			p.Log(logger.Info, "reloading configuration (API request)")

			err := p.reloadConf(newConf, true)
			if err != nil {
				p.Log(logger.Error, "%s", err)
				break outer
			}

		case <-interrupt:
			p.Log(logger.Info, "shutting down gracefully")
			break outer

		case <-p.ctx.Done():
			break outer
		}
	}

	p.ctxCancel()

	p.closeResources(nil, false)
}

func (p *Core) createResources(initial bool) error {
	var err error

	if p.logger == nil {
		p.logger, err = logger.New(
			logger.Level(p.conf.LogLevel),
			p.conf.LogDestinations,
			p.conf.LogFile,
		)
		if err != nil {
			return err
		}
	}

	if initial {
		p.Log(logger.Info, "MediaMTX %s", version)

		if p.confPath != "" {
			a, _ := filepath.Abs(p.confPath)
			p.Log(logger.Info, "configuration loaded from %s", a)
		} else {
			list := make([]string, len(defaultConfPaths))
			for i, pa := range defaultConfPaths {
				a, _ := filepath.Abs(pa)
				list[i] = a
			}

			p.Log(logger.Warn,
				"configuration file not found (looked in %s), using an empty configuration",
				strings.Join(list, ", "))
		}

		// on Linux, try to raise the number of file descriptors that can be opened
		// to allow the maximum possible number of clients.
		rlimit.Raise() //nolint:errcheck

		gin.SetMode(gin.ReleaseMode)

		p.externalCmdPool = externalcmd.NewPool()
	}

	if p.conf.Metrics &&
		p.metrics == nil {
		p.metrics = &metrics{
			Address:     p.conf.MetricsAddress,
			ReadTimeout: p.conf.ReadTimeout,
			Parent:      p,
		}
		err = p.metrics.initialize()
		if err != nil {
			return err
		}
	}

	if p.conf.PPROF &&
		p.pprof == nil {
		p.pprof, err = newPPROF(
			p.conf.PPROFAddress,
			p.conf.ReadTimeout,
			p,
		)
		if err != nil {
			return err
		}
	}

	cleanerEntries := gatherCleanerEntries(p.conf.Paths)
	if len(cleanerEntries) != 0 &&
		p.recordCleaner == nil {
		p.recordCleaner = &record.Cleaner{
			Entries: cleanerEntries,
			Parent:  p,
		}
		p.recordCleaner.Initialize()
	}

	if p.pathManager == nil {
		p.pathManager = newPathManager(
			p.conf.ExternalAuthenticationURL,
			p.conf.RTSPAddress,
			p.conf.AuthMethods,
			p.conf.ReadTimeout,
			p.conf.WriteTimeout,
			p.conf.WriteQueueSize,
			p.conf.UDPMaxPayloadSize,
			p.conf.Paths,
			p.externalCmdPool,
			p,
		)

		if p.metrics != nil {
			p.metrics.setPathManager(p.pathManager)
		}
	}

	if p.conf.RTSP &&
		(p.conf.Encryption == conf.EncryptionNo ||
			p.conf.Encryption == conf.EncryptionOptional) &&
		p.rtspServer == nil {
		_, useUDP := p.conf.Protocols[conf.Protocol(gortsplib.TransportUDP)]
		_, useMulticast := p.conf.Protocols[conf.Protocol(gortsplib.TransportUDPMulticast)]

		p.rtspServer, err = newRTSPServer(
			p.conf.RTSPAddress,
			p.conf.AuthMethods,
			p.conf.ReadTimeout,
			p.conf.WriteTimeout,
			p.conf.WriteQueueSize,
			useUDP,
			useMulticast,
			p.conf.RTPAddress,
			p.conf.RTCPAddress,
			p.conf.MulticastIPRange,
			p.conf.MulticastRTPPort,
			p.conf.MulticastRTCPPort,
			false,
			"",
			"",
			p.conf.RTSPAddress,
			p.conf.Protocols,
			p.conf.RunOnConnect,
			p.conf.RunOnConnectRestart,
			p.conf.RunOnDisconnect,
			p.externalCmdPool,
			p.pathManager,
			p,
		)
		if err != nil {
			return err
		}

		if p.metrics != nil {
			p.metrics.setRTSPServer(p.rtspServer)
		}
	}

	if p.conf.RTSP &&
		(p.conf.Encryption == conf.EncryptionStrict ||
			p.conf.Encryption == conf.EncryptionOptional) &&
		p.rtspsServer == nil {
		p.rtspsServer, err = newRTSPServer(
			p.conf.RTSPSAddress,
			p.conf.AuthMethods,
			p.conf.ReadTimeout,
			p.conf.WriteTimeout,
			p.conf.WriteQueueSize,
			false,
			false,
			"",
			"",
			"",
			0,
			0,
			true,
			p.conf.ServerCert,
			p.conf.ServerKey,
			p.conf.RTSPAddress,
			p.conf.Protocols,
			p.conf.RunOnConnect,
			p.conf.RunOnConnectRestart,
			p.conf.RunOnDisconnect,
			p.externalCmdPool,
			p.pathManager,
			p,
		)
		if err != nil {
			return err
		}

		if p.metrics != nil {
			p.metrics.setRTSPSServer(p.rtspsServer)
		}
	}

	if p.conf.RTMP &&
		(p.conf.RTMPEncryption == conf.EncryptionNo ||
			p.conf.RTMPEncryption == conf.EncryptionOptional) &&
		p.rtmpServer == nil {
		p.rtmpServer, err = newRTMPServer(
			p.conf.RTMPAddress,
			p.conf.ReadTimeout,
			p.conf.WriteTimeout,
			p.conf.WriteQueueSize,
			false,
			"",
			"",
			p.conf.RTSPAddress,
			p.conf.RunOnConnect,
			p.conf.RunOnConnectRestart,
			p.conf.RunOnDisconnect,
			p.externalCmdPool,
			p.pathManager,
			p,
		)
		if err != nil {
			return err
		}

		if p.metrics != nil {
			p.metrics.setRTMPServer(p.rtmpServer)
		}
	}

	if p.conf.RTMP &&
		(p.conf.RTMPEncryption == conf.EncryptionStrict ||
			p.conf.RTMPEncryption == conf.EncryptionOptional) &&
		p.rtmpsServer == nil {
		p.rtmpsServer, err = newRTMPServer(
			p.conf.RTMPSAddress,
			p.conf.ReadTimeout,
			p.conf.WriteTimeout,
			p.conf.WriteQueueSize,
			true,
			p.conf.RTMPServerCert,
			p.conf.RTMPServerKey,
			p.conf.RTSPAddress,
			p.conf.RunOnConnect,
			p.conf.RunOnConnectRestart,
			p.conf.RunOnDisconnect,
			p.externalCmdPool,
			p.pathManager,
			p,
		)
		if err != nil {
			return err
		}

		if p.metrics != nil {
			p.metrics.setRTMPSServer(p.rtmpsServer)
		}
	}

	if p.conf.HLS &&
		p.hlsManager == nil {
		p.hlsManager, err = newHLSManager(
			p.conf.HLSAddress,
			p.conf.HLSEncryption,
			p.conf.HLSServerKey,
			p.conf.HLSServerCert,
			p.conf.ExternalAuthenticationURL,
			p.conf.HLSAlwaysRemux,
			p.conf.HLSVariant,
			p.conf.HLSSegmentCount,
			p.conf.HLSSegmentDuration,
			p.conf.HLSPartDuration,
			p.conf.HLSSegmentMaxSize,
			p.conf.HLSAllowOrigin,
			p.conf.HLSTrustedProxies,
			p.conf.HLSDirectory,
			p.conf.ReadTimeout,
			p.conf.WriteQueueSize,
			p.pathManager,
			p,
		)
		if err != nil {
			return err
		}

		p.pathManager.setHLSManager(p.hlsManager)

		if p.metrics != nil {
			p.metrics.setHLSManager(p.hlsManager)
		}
	}

	if p.conf.WebRTC &&
		p.webRTCManager == nil {
		p.webRTCManager = &webRTCManager{
			Address:               p.conf.WebRTCAddress,
			Encryption:            p.conf.WebRTCEncryption,
			ServerKey:             p.conf.WebRTCServerKey,
			ServerCert:            p.conf.WebRTCServerCert,
			AllowOrigin:           p.conf.WebRTCAllowOrigin,
			TrustedProxies:        p.conf.WebRTCTrustedProxies,
			ReadTimeout:           p.conf.ReadTimeout,
			WriteQueueSize:        p.conf.WriteQueueSize,
			LocalUDPAddress:       p.conf.WebRTCLocalUDPAddress,
			LocalTCPAddress:       p.conf.WebRTCLocalTCPAddress,
			IPsFromInterfaces:     p.conf.WebRTCIPsFromInterfaces,
			IPsFromInterfacesList: p.conf.WebRTCIPsFromInterfacesList,
			AdditionalHosts:       p.conf.WebRTCAdditionalHosts,
			ICEServers:            p.conf.WebRTCICEServers2,
			ExternalCmdPool:       p.externalCmdPool,
			PathManager:           p.pathManager,
			Parent:                p,
		}
		err = p.webRTCManager.initialize()
		if err != nil {
			p.webRTCManager = nil
			return err
		}

		if p.metrics != nil {
			p.metrics.setWebRTCManager(p.webRTCManager)
		}
	}

	if p.conf.SRT &&
		p.srtServer == nil {
		p.srtServer, err = newSRTServer(
			p.conf.SRTAddress,
			p.conf.RTSPAddress,
			p.conf.ReadTimeout,
			p.conf.WriteTimeout,
			p.conf.WriteQueueSize,
			p.conf.UDPMaxPayloadSize,
			p.conf.RunOnConnect,
			p.conf.RunOnConnectRestart,
			p.conf.RunOnDisconnect,
			p.externalCmdPool,
			p.pathManager,
			p,
		)
		if err != nil {
			return err
		}

		if p.metrics != nil {
			p.metrics.setSRTServer(p.srtServer)
		}
	}

	if p.conf.API &&
		p.api == nil {
		p.api, err = newAPI(
			p.conf.APIAddress,
			p.conf.ReadTimeout,
			p.conf,
			p.pathManager,
			p.rtspServer,
			p.rtspsServer,
			p.rtmpServer,
			p.rtmpsServer,
			p.hlsManager,
			p.webRTCManager,
			p.srtServer,
			p,
		)
		if err != nil {
			return err
		}
	}

	if initial && p.confPath != "" {
		p.confWatcher, err = confwatcher.New(p.confPath)
		if err != nil {
			return err
		}
	}

	return nil
}

func (p *Core) closeResources(newConf *conf.Conf, calledByAPI bool) {
	closeLogger := newConf == nil ||
		newConf.LogLevel != p.conf.LogLevel ||
		!reflect.DeepEqual(newConf.LogDestinations, p.conf.LogDestinations) ||
		newConf.LogFile != p.conf.LogFile

	closeMetrics := newConf == nil ||
		newConf.Metrics != p.conf.Metrics ||
		newConf.MetricsAddress != p.conf.MetricsAddress ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		closeLogger

	closePPROF := newConf == nil ||
		newConf.PPROF != p.conf.PPROF ||
		newConf.PPROFAddress != p.conf.PPROFAddress ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		closeLogger

	closeRecorderCleaner := newConf == nil ||
		!reflect.DeepEqual(gatherCleanerEntries(newConf.Paths), gatherCleanerEntries(p.conf.Paths)) ||
		closeLogger

	closePathManager := newConf == nil ||
		newConf.ExternalAuthenticationURL != p.conf.ExternalAuthenticationURL ||
		newConf.RTSPAddress != p.conf.RTSPAddress ||
		!reflect.DeepEqual(newConf.AuthMethods, p.conf.AuthMethods) ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteTimeout != p.conf.WriteTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		newConf.UDPMaxPayloadSize != p.conf.UDPMaxPayloadSize ||
		closeMetrics ||
		closeLogger
	if !closePathManager && !reflect.DeepEqual(newConf.Paths, p.conf.Paths) {
		p.pathManager.confReload(newConf.Paths)
	}

	closeRTSPServer := newConf == nil ||
		newConf.RTSP != p.conf.RTSP ||
		newConf.Encryption != p.conf.Encryption ||
		newConf.RTSPAddress != p.conf.RTSPAddress ||
		!reflect.DeepEqual(newConf.AuthMethods, p.conf.AuthMethods) ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteTimeout != p.conf.WriteTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		!reflect.DeepEqual(newConf.Protocols, p.conf.Protocols) ||
		newConf.RTPAddress != p.conf.RTPAddress ||
		newConf.RTCPAddress != p.conf.RTCPAddress ||
		newConf.MulticastIPRange != p.conf.MulticastIPRange ||
		newConf.MulticastRTPPort != p.conf.MulticastRTPPort ||
		newConf.MulticastRTCPPort != p.conf.MulticastRTCPPort ||
		newConf.RTSPAddress != p.conf.RTSPAddress ||
		!reflect.DeepEqual(newConf.Protocols, p.conf.Protocols) ||
		newConf.RunOnConnect != p.conf.RunOnConnect ||
		newConf.RunOnConnectRestart != p.conf.RunOnConnectRestart ||
		newConf.RunOnDisconnect != p.conf.RunOnDisconnect ||
		closeMetrics ||
		closePathManager ||
		closeLogger

	closeRTSPSServer := newConf == nil ||
		newConf.RTSP != p.conf.RTSP ||
		newConf.Encryption != p.conf.Encryption ||
		newConf.RTSPSAddress != p.conf.RTSPSAddress ||
		!reflect.DeepEqual(newConf.AuthMethods, p.conf.AuthMethods) ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteTimeout != p.conf.WriteTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		newConf.ServerCert != p.conf.ServerCert ||
		newConf.ServerKey != p.conf.ServerKey ||
		newConf.RTSPAddress != p.conf.RTSPAddress ||
		!reflect.DeepEqual(newConf.Protocols, p.conf.Protocols) ||
		newConf.RunOnConnect != p.conf.RunOnConnect ||
		newConf.RunOnConnectRestart != p.conf.RunOnConnectRestart ||
		newConf.RunOnDisconnect != p.conf.RunOnDisconnect ||
		closeMetrics ||
		closePathManager ||
		closeLogger

	closeRTMPServer := newConf == nil ||
		newConf.RTMP != p.conf.RTMP ||
		newConf.RTMPEncryption != p.conf.RTMPEncryption ||
		newConf.RTMPAddress != p.conf.RTMPAddress ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteTimeout != p.conf.WriteTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		newConf.RTSPAddress != p.conf.RTSPAddress ||
		newConf.RunOnConnect != p.conf.RunOnConnect ||
		newConf.RunOnConnectRestart != p.conf.RunOnConnectRestart ||
		newConf.RunOnDisconnect != p.conf.RunOnDisconnect ||
		closeMetrics ||
		closePathManager ||
		closeLogger

	closeRTMPSServer := newConf == nil ||
		newConf.RTMP != p.conf.RTMP ||
		newConf.RTMPEncryption != p.conf.RTMPEncryption ||
		newConf.RTMPSAddress != p.conf.RTMPSAddress ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteTimeout != p.conf.WriteTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		newConf.RTMPServerCert != p.conf.RTMPServerCert ||
		newConf.RTMPServerKey != p.conf.RTMPServerKey ||
		newConf.RTSPAddress != p.conf.RTSPAddress ||
		newConf.RunOnConnect != p.conf.RunOnConnect ||
		newConf.RunOnConnectRestart != p.conf.RunOnConnectRestart ||
		newConf.RunOnDisconnect != p.conf.RunOnDisconnect ||
		closeMetrics ||
		closePathManager ||
		closeLogger

	closeHLSManager := newConf == nil ||
		newConf.HLS != p.conf.HLS ||
		newConf.HLSAddress != p.conf.HLSAddress ||
		newConf.HLSEncryption != p.conf.HLSEncryption ||
		newConf.HLSServerKey != p.conf.HLSServerKey ||
		newConf.HLSServerCert != p.conf.HLSServerCert ||
		newConf.ExternalAuthenticationURL != p.conf.ExternalAuthenticationURL ||
		newConf.HLSAlwaysRemux != p.conf.HLSAlwaysRemux ||
		newConf.HLSVariant != p.conf.HLSVariant ||
		newConf.HLSSegmentCount != p.conf.HLSSegmentCount ||
		newConf.HLSSegmentDuration != p.conf.HLSSegmentDuration ||
		newConf.HLSPartDuration != p.conf.HLSPartDuration ||
		newConf.HLSSegmentMaxSize != p.conf.HLSSegmentMaxSize ||
		newConf.HLSAllowOrigin != p.conf.HLSAllowOrigin ||
		!reflect.DeepEqual(newConf.HLSTrustedProxies, p.conf.HLSTrustedProxies) ||
		newConf.HLSDirectory != p.conf.HLSDirectory ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		closePathManager ||
		closeMetrics ||
		closeLogger

	closeWebRTCManager := newConf == nil ||
		newConf.WebRTC != p.conf.WebRTC ||
		newConf.WebRTCAddress != p.conf.WebRTCAddress ||
		newConf.WebRTCEncryption != p.conf.WebRTCEncryption ||
		newConf.WebRTCServerKey != p.conf.WebRTCServerKey ||
		newConf.WebRTCServerCert != p.conf.WebRTCServerCert ||
		newConf.WebRTCAllowOrigin != p.conf.WebRTCAllowOrigin ||
		!reflect.DeepEqual(newConf.WebRTCTrustedProxies, p.conf.WebRTCTrustedProxies) ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		newConf.WebRTCLocalUDPAddress != p.conf.WebRTCLocalUDPAddress ||
		newConf.WebRTCLocalTCPAddress != p.conf.WebRTCLocalTCPAddress ||
		newConf.WebRTCIPsFromInterfaces != p.conf.WebRTCIPsFromInterfaces ||
		!reflect.DeepEqual(newConf.WebRTCIPsFromInterfacesList, p.conf.WebRTCIPsFromInterfacesList) ||
		!reflect.DeepEqual(newConf.WebRTCAdditionalHosts, p.conf.WebRTCAdditionalHosts) ||
		!reflect.DeepEqual(newConf.WebRTCICEServers2, p.conf.WebRTCICEServers2) ||
		closeMetrics ||
		closePathManager ||
		closeLogger

	closeSRTServer := newConf == nil ||
		newConf.SRT != p.conf.SRT ||
		newConf.SRTAddress != p.conf.SRTAddress ||
		newConf.RTSPAddress != p.conf.RTSPAddress ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		newConf.WriteTimeout != p.conf.WriteTimeout ||
		newConf.WriteQueueSize != p.conf.WriteQueueSize ||
		newConf.UDPMaxPayloadSize != p.conf.UDPMaxPayloadSize ||
		newConf.RunOnConnect != p.conf.RunOnConnect ||
		newConf.RunOnConnectRestart != p.conf.RunOnConnectRestart ||
		newConf.RunOnDisconnect != p.conf.RunOnDisconnect ||
		closePathManager ||
		closeLogger

	closeAPI := newConf == nil ||
		newConf.API != p.conf.API ||
		newConf.APIAddress != p.conf.APIAddress ||
		newConf.ReadTimeout != p.conf.ReadTimeout ||
		closePathManager ||
		closeRTSPServer ||
		closeRTSPSServer ||
		closeRTMPServer ||
		closeHLSManager ||
		closeWebRTCManager ||
		closeSRTServer ||
		closeLogger

	if newConf == nil && p.confWatcher != nil {
		p.confWatcher.Close()
		p.confWatcher = nil
	}

	if p.api != nil {
		if closeAPI {
			p.api.close()
			p.api = nil
		} else if !calledByAPI { // avoid a loop
			p.api.confReload(newConf)
		}
	}

	if closeSRTServer && p.srtServer != nil {
		if p.metrics != nil {
			p.metrics.setSRTServer(nil)
		}

		p.srtServer.close()
		p.srtServer = nil
	}

	if closeWebRTCManager && p.webRTCManager != nil {
		if p.metrics != nil {
			p.metrics.setWebRTCManager(nil)
		}

		p.webRTCManager.close()
		p.webRTCManager = nil
	}

	if closeHLSManager && p.hlsManager != nil {
		if p.metrics != nil {
			p.metrics.setHLSManager(nil)
		}

		p.pathManager.setHLSManager(nil)

		p.hlsManager.close()
		p.hlsManager = nil
	}

	if closeRTMPSServer && p.rtmpsServer != nil {
		if p.metrics != nil {
			p.metrics.setRTMPSServer(nil)
		}

		p.rtmpsServer.close()
		p.rtmpsServer = nil
	}

	if closeRTMPServer && p.rtmpServer != nil {
		if p.metrics != nil {
			p.metrics.setRTMPServer(nil)
		}

		p.rtmpServer.close()
		p.rtmpServer = nil
	}

	if closeRTSPSServer && p.rtspsServer != nil {
		if p.metrics != nil {
			p.metrics.setRTSPSServer(nil)
		}

		p.rtspsServer.close()
		p.rtspsServer = nil
	}

	if closeRTSPServer && p.rtspServer != nil {
		if p.metrics != nil {
			p.metrics.setRTSPServer(nil)
		}

		p.rtspServer.close()
		p.rtspServer = nil
	}

	if closePathManager && p.pathManager != nil {
		if p.metrics != nil {
			p.metrics.setPathManager(nil)
		}

		p.pathManager.close()
		p.pathManager = nil
	}

	if closeRecorderCleaner && p.recordCleaner != nil {
		p.recordCleaner.Close()
		p.recordCleaner = nil
	}

	if closePPROF && p.pprof != nil {
		p.pprof.close()
		p.pprof = nil
	}

	if closeMetrics && p.metrics != nil {
		p.metrics.close()
		p.metrics = nil
	}

	if newConf == nil && p.externalCmdPool != nil {
		p.Log(logger.Info, "waiting for running hooks")
		p.externalCmdPool.Close()
	}

	if closeLogger {
		p.logger.Close()
		p.logger = nil
	}
}

func (p *Core) reloadConf(newConf *conf.Conf, calledByAPI bool) error {
	p.closeResources(newConf, calledByAPI)
	p.conf = newConf
	return p.createResources(false)
}

// apiConfigSet is called by api.
func (p *Core) apiConfigSet(conf *conf.Conf) {
	select {
	case p.chAPIConfigSet <- conf:
	case <-p.ctx.Done():
	}
}