package notify

import (
	"b612.me/starcrypto"
	"context"
	"errors"
	"fmt"
	"net"
	"os"
	"sync"
	"sync/atomic"
	"time"
)

const (
	MSG_SYS MessageType = iota
	MSG_SYS_WAIT
	MSG_SYS_REPLY
	MSG_KEY_CHANGE
	MSG_ASYNC
	MSG_SYNC_ASK
	MSG_SYNC_REPLY
)

type MessageType uint8

type NetType uint8

const (
	NET_SERVER NetType = iota
	NET_CLIENT
)

type MsgVal []byte
type TransferMsg struct {
	ID    uint64
	Key   string
	Value MsgVal
	Type  MessageType
}

type Message struct {
	NetType
	ClientConn *ClientConn
	ServerConn Client
	TransferMsg
	Time time.Time
	sync.Mutex
}

type WaitMsg struct {
	TransferMsg
	Time  time.Time
	Reply chan Message
	//Ctx   context.Context
}

func (m *Message) Reply(value MsgVal) (err error) {
	reply := TransferMsg{
		ID:    m.ID,
		Key:   m.Key,
		Value: value,
		Type:  m.Type,
	}
	if reply.Type == MSG_SYNC_ASK {
		reply.Type = MSG_SYNC_REPLY
	}
	if reply.Type == MSG_SYS_WAIT {
		reply.Type = MSG_SYS_REPLY
	}
	if m.NetType == NET_SERVER {
		_, err = m.ClientConn.server.send(m.ClientConn, reply)
	}
	if m.NetType == NET_CLIENT {
		_, err = m.ServerConn.send(reply)
	}
	return
}

func (m *Message) ReplyObj(value interface{}) (err error) {
	data, err := encode(value)
	if err != nil {
		return err
	}
	return m.Reply(data)
}

type ClientConn struct {
	alive           atomic.Value
	status          Status
	ClientID        string
	ClientAddr      net.Addr
	tuConn          net.Conn
	server          Server
	stopFn          context.CancelFunc
	stopCtx         context.Context
	maxReadTimeout  time.Duration
	maxWriteTimeout time.Duration
	msgEn           func([]byte, []byte) []byte
	msgDe           func([]byte, []byte) []byte
	handshakeRsaKey []byte
	SecretKey       []byte
	lastHeartBeat   int64
}

type Status struct {
	Alive  bool
	Reason string
	Err    error
}

func (c *ClientConn) readTUMessage() {
	for {
		select {
		case <-c.stopCtx.Done():
			c.tuConn.Close()
			c.server.removeClient(c)
			return
		default:
		}
		if c.maxReadTimeout.Seconds() > 0 {
			c.tuConn.SetReadDeadline(time.Now().Add(c.maxReadTimeout))
		}
		data := make([]byte, 8192)
		num, err := c.tuConn.Read(data)
		if err == os.ErrDeadlineExceeded {
			if num != 0 {
				c.server.pushMessage(data[:num], c.ClientID)
			}
			continue
		}
		if err != nil {
			//conn is broke
			c.alive.Store(false)
			c.status = Status{
				Alive:  false,
				Reason: "read error",
				Err:    err,
			}
			c.stopFn()
			continue
		}
		c.server.pushMessage(data[:num], c.ClientID)
		//fmt.Println("finished:", float64(time.Now().UnixNano()-nowd)/1000000)
	}
}

func (c *ClientConn) rsaDecode(message Message) {
	unknownKey := message.Value
	data, err := starcrypto.RSADecrypt(unknownKey, c.handshakeRsaKey, "")
	if err != nil {
		fmt.Println(err)
		message.Reply([]byte("failed"))
		return
	}
	//fmt.Println("aes-key changed to", string(data))
	message.Reply([]byte("success"))
	c.SecretKey = data
}

func (c *ClientConn) sayGoodByeForTU() error {
	_, err := c.server.sendWait(c, TransferMsg{
		ID:    10010,
		Key:   "bye",
		Value: nil,
		Type:  MSG_SYS_WAIT,
	}, time.Second*3)
	return err
}

func (c *ClientConn) GetSecretKey() []byte {
	return c.SecretKey
}
func (c *ClientConn) SetSecretKey(key []byte) {
	c.SecretKey = key
}

func (c *ClientConn) GetMsgEn() func([]byte, []byte) []byte {
	return c.msgEn
}
func (c *ClientConn) SetMsgEn(fn func([]byte, []byte) []byte) {
	c.msgEn = fn
}
func (c *ClientConn) GetMsgDe() func([]byte, []byte) []byte {
	return c.msgDe
}
func (c *ClientConn) SetMsgDe(fn func([]byte, []byte) []byte) {
	c.msgDe = fn
}

func (c *ClientConn) StopMonitorChan() <-chan struct{} {
	return c.stopCtx.Done()
}

func (c *ClientConn) Status() Status {
	return c.status
}

func (c *ClientConn) Server() Server {
	return c.server
}

func (c *ClientConn) GetRemoteAddr() net.Addr {
	return c.ClientAddr
}

func (m MsgVal) ToClearString() string {
	return string(m)
}

func (m MsgVal) ToInterface() (interface{}, error) {
	return Decode(m)
}

func (m MsgVal) MustToInterface() interface{} {
	inf, err := m.ToInterface()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToString() (string, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return "", err
	}
	if data, ok := inf.(string); !ok {
		return "", errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToString() string {
	inf, err := m.ToString()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToInt32() (int32, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return 0, err
	}
	if data, ok := inf.(int32); !ok {
		return 0, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToInt32() int32 {
	inf, err := m.ToInt32()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToInt() (int, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return 0, err
	}
	if data, ok := inf.(int); !ok {
		return 0, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToInt() int {
	inf, err := m.ToInt()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToUint64() (uint64, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return 0, err
	}
	if data, ok := inf.(uint64); !ok {
		return 0, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToUint64() uint64 {
	inf, err := m.ToUint64()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToUint32() (uint32, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return 0, err
	}
	if data, ok := inf.(uint32); !ok {
		return 0, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToUint32() uint32 {
	inf, err := m.ToUint32()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToUint() (uint, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return 0, err
	}
	if data, ok := inf.(uint); !ok {
		return 0, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToUint() uint {
	inf, err := m.ToUint()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToBool() (bool, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return false, err
	}
	if data, ok := inf.(bool); !ok {
		return false, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToBool() bool {
	inf, err := m.ToBool()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToFloat64() (float64, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return 0, err
	}
	if data, ok := inf.(float64); !ok {
		return 0, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToFloat64() float64 {
	inf, err := m.ToFloat64()
	if err != nil {
		panic(err)
	}
	return inf
}
func (m MsgVal) ToFloat32() (float32, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return 0, err
	}
	if data, ok := inf.(float32); !ok {
		return 0, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToFloat32() float32 {
	inf, err := m.ToFloat32()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToSliceString() ([]string, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return []string{}, err
	}
	if data, ok := inf.([]string); !ok {
		return []string{}, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToSliceString() []string {
	inf, err := m.ToSliceString()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToSliceInt64() ([]int64, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return []int64{}, err
	}
	if data, ok := inf.([]int64); !ok {
		return []int64{}, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToSliceInt64() []int64 {
	inf, err := m.ToSliceInt64()
	if err != nil {
		panic(err)
	}
	return inf
}

func (m MsgVal) ToSliceFloat64() ([]float64, error) {
	inf, err := m.ToInterface()
	if err != nil {
		return []float64{}, err
	}
	if data, ok := inf.([]float64); !ok {
		return []float64{}, errors.New("source data not match target type")
	} else {
		return data, nil
	}
}

func (m MsgVal) MustToSliceFloat64() []float64 {
	inf, err := m.ToSliceFloat64()
	if err != nil {
		panic(err)
	}
	return inf
}

func ToMsgVal(val interface{}) (MsgVal, error) {
	return Encode(val)
}

func MustToMsgVal(val interface{}) MsgVal {
	d, err := ToMsgVal(val)
	if err != nil {
		panic(err)
	}
	return d
}