package notify

import (
	"b612.me/stario"
	"context"
	"net"
	"sync"
	"sync/atomic"
	"time"
)

type ClientCommon struct {
	alive                         atomic.Value
	status                        Status
	byeFromServer                 bool
	conn                          net.Conn
	mu                            sync.Mutex
	msgID                         uint64
	peerIdentity                  string
	sessionEpoch                  uint64
	sessionOwnerState             atomic.Int32
	sessionRuntime                atomic.Pointer[clientSessionRuntime]
	connectSource                 atomic.Pointer[clientConnectSource]
	queue                         *stario.StarQueue
	stopFn                        context.CancelFunc
	stopCtx                       context.Context
	parallelNum                   int
	maxReadTimeout                time.Duration
	maxWriteTimeout               time.Duration
	keyExchangeFn                 func(c Client) error
	linkFns                       map[string]func(message *Message)
	defaultFns                    func(message *Message)
	msgEn                         func([]byte, []byte) []byte
	msgDe                         func([]byte, []byte) []byte
	fastStreamEncode              transportFastStreamEncoder
	fastBulkEncode                transportFastBulkEncoder
	fastPlainEncode               transportFastPlainEncoder
	modernPSKRuntime              *modernPSKCodecRuntime
	handshakeRsaPubKey            []byte
	SecretKey                     []byte
	transportProtection           atomic.Pointer[transportProtectionProfile]
	peerAttachSecurity            atomic.Pointer[peerAttachSecurityState]
	securityBootstrap             transportProtectionProfile
	securitySteady                transportProtectionProfile
	securitySteadyNegotiated      transportProtectionProfile
	securityAuthMode              AuthMode
	securityProtectionMode        ProtectionMode
	securityRequireForwardSecrecy bool
	securityConfigured            bool
	peerAttachAuthenticated       bool
	peerAttachAuthFallback        bool
	peerAttachAt                  int64
	noFinSyncMsgMaxKeepSeconds    int
	lastHeartbeat                 int64
	heartbeatPeriod               time.Duration
	wg                            stario.WaitGroup
	netType                       NetType
	showError                     bool
	skipKeyExchange               bool
	useHeartBeat                  bool
	sequenceDe                    func([]byte) (interface{}, error)
	sequenceEn                    func(interface{}) ([]byte, error)
	logicalSession                *logicalSessionState
	onFileEvent                   func(FileEvent)
	fileEventObserver             func(FileEvent)
	fileTransferCfg               fileTransferConfig
	signalReliableCfg             signalReliabilityConfig
	streamRuntime                 *streamRuntime
	recordRuntime                 *recordRuntime
	bulkRuntime                   *bulkRuntime
	bulkDefaultOpenMode           BulkOpenMode
	bulkNetworkProfile            BulkNetworkProfile
	bulkOpenTuning                BulkOpenTuning
	bulkDedicatedAttachLimit      int
	bulkDedicatedAttachSem        chan struct{}
	bulkDedicatedAttachRetry      int
	bulkDedicatedAttachBackoff    time.Duration
	bulkDedicatedDialTimeout      time.Duration
	bulkDedicatedHelloTimeout     time.Duration
	bulkDedicatedActiveLimit      int
	bulkDedicatedActive           atomic.Int32
	bulkDedicatedActiveWait       chan struct{}
	bulkDedicatedLaneLimit        int
	bulkDedicatedSidecarMu        sync.Mutex
	bulkDedicatedLanes            map[uint32]*bulkDedicatedLane
	bulkDedicatedNextLaneID       uint32
	bulkAttachAttemptCount        atomic.Int64
	bulkAttachRetryCount          atomic.Int64
	bulkAttachSuccessCount        atomic.Int64
	bulkAttachFallbackCount       atomic.Int64
	connectionRetryState          *connectionRetryState
	securityReadyCheck            bool
	debugMode                     bool
}

func NewClient() Client {
	transport := defaultModernPSKTransportBundle()
	var client = ClientCommon{
		maxReadTimeout:             0,
		maxWriteTimeout:            0,
		peerIdentity:               newClientPeerIdentity(),
		sequenceEn:                 encode,
		sequenceDe:                 Decode,
		keyExchangeFn:              aesRsaHello,
		SecretKey:                  nil,
		handshakeRsaPubKey:         defaultRsaPubKey,
		msgEn:                      transport.msgEn,
		msgDe:                      transport.msgDe,
		fastStreamEncode:           transport.fastStreamEncode,
		fastBulkEncode:             transport.fastBulkEncode,
		fastPlainEncode:            transport.fastPlainEncode,
		skipKeyExchange:            true,
		securityReadyCheck:         true,
		bulkDefaultOpenMode:        BulkOpenModeShared,
		bulkNetworkProfile:         BulkNetworkProfileDefault,
		bulkOpenTuning:             defaultBulkOpenTuning(),
		bulkDedicatedAttachLimit:   defaultBulkDedicatedAttachLimit,
		bulkDedicatedAttachRetry:   defaultBulkDedicatedAttachRetry,
		bulkDedicatedAttachBackoff: defaultBulkDedicatedAttachBackoff,
		bulkDedicatedDialTimeout:   defaultBulkDedicatedDialTimeout,
		bulkDedicatedHelloTimeout:  defaultBulkDedicatedHelloTimeout,
		bulkDedicatedActiveLimit:   defaultBulkDedicatedActiveLimit,
		bulkDedicatedActiveWait:    make(chan struct{}),
		bulkDedicatedLaneLimit:     defaultBulkDedicatedLaneLimit,
	}
	client.alive.Store(false)
	client.useHeartBeat = true
	client.heartbeatPeriod = time.Second * 20
	client.linkFns = make(map[string]func(*Message))
	client.defaultFns = func(message *Message) {
		return
	}
	client.wg = stario.NewWaitGroup(0)
	client.fileTransferCfg = defaultFileTransferConfig()
	client.signalReliableCfg = defaultSignalReliabilityConfig()
	client.logicalSession = newLogicalSessionState(client.fileTransferCfg, client.signalReliableCfg)
	client.streamRuntime = newStreamRuntime("cstrm")
	client.recordRuntime = newRecordRuntime()
	client.bulkRuntime = newBulkRuntime("cblk")
	client.bulkDedicatedLanes = make(map[uint32]*bulkDedicatedLane)
	if client.bulkDedicatedAttachLimit > 0 {
		client.bulkDedicatedAttachSem = make(chan struct{}, client.bulkDedicatedAttachLimit)
	}
	client.connectionRetryState = newConnectionRetryState()
	client.onFileEvent = normalizeFileEventCallback(nil)
	client.fileEventObserver = normalizeFileEventCallback(nil)
	client.stopCtx, client.stopFn = context.WithCancel(context.Background())
	client.sessionRuntime.Store(newClientSessionRuntimeBase(client.stopCtx, client.stopFn))
	client.setClientTransportProtectionProfile(defaultTransportProtectionProfile())
	client.peerAttachSecurity.Store(defaultPeerAttachSecurityState())
	bindClientStreamControl(&client)
	bindClientBulkControl(&client)
	client.getTransferState().setBuiltinHandler(client.builtinFileTransferHandler)
	return &client
}

func (c *ClientCommon) maxWriteTimeoutSnapshot() time.Duration {
	if c == nil {
		return 0
	}
	c.mu.Lock()
	defer c.mu.Unlock()
	return c.maxWriteTimeout
}