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
	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))
	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
}