package global

import (
	"bytes"
	"encoding/json"
	"fmt"
	rsp "mtp20access/model/mq/response"
	"sync"

	"github.com/mitchellh/mapstructure"
)

type LoginRedis struct {
	LoginID   string `json:"loginId" redis:"loginId"`     // 登陆账号
	UserID    string `json:"userId" redis:"userId"`       // 用户ID
	SessionID string `json:"sessionId" redis:"sessionId"` // 终端sid
	Token     string `json:"token" redis:"token"`         // 令牌
	Group     string `json:"group" redis:"group"`         // 终端分组
	Addr      string `json:"addr" redis:"addr"`           // 客户端地址信息 // FIXME: 由于本服务改用短连，所以每次提交请交请求可能会不一样，后期可判断是否在中间件中进行拦截
}

// FromMap Map to Struct
func (r *LoginRedis) FromMap(val map[string]interface{}) error {
	return mapstructure.Decode(val, r)
}

// ToMap Struct to Map
func (r *LoginRedis) ToMap() (val map[string]interface{}, err error) {
	if marshalContent, err := json.Marshal(r); err != nil {
		return nil, err
	} else {
		d := json.NewDecoder(bytes.NewReader(marshalContent))
		d.UseNumber() // 设置将float64转为一个number
		if err := d.Decode(&val); err != nil {
			fmt.Println(err)
		} else {
			for k, v := range val {
				val[k] = v
			}
		}
	}

	return
}

type Client struct {
	LoginRedis

	mtx             sync.RWMutex
	curSerialNumber uint32                // 当前业务流水号
	asyncTasks      map[string]*AsyncTask // key:SessionId_FuncodeRsp_SerialNumber
}

// GetSerialNumber 获取可用流水号
func (r *Client) GetSerialNumber() uint32 {
	r.mtx.Lock()
	defer func() {
		r.mtx.Unlock()
	}()
	r.curSerialNumber += 1

	return r.curSerialNumber
}

// GetAsyncTask 获取目标异步任务
// key:SessionId_FuncodeRsp
func (r *Client) GetAsyncTask(key string) (asyncTask *AsyncTask) {
	r.mtx.RLock()
	defer func() {
		r.mtx.RUnlock()
	}()

	asyncTask, ok := r.asyncTasks[key]
	if ok {
		return asyncTask
	} else {
		return nil
	}
}

// SetAsyncTask 设置异步任务
func (r *Client) SetAsyncTask(asyncTask *AsyncTask, key string) {
	r.mtx.Lock()
	defer func() {
		r.mtx.Unlock()
	}()

	if r.asyncTasks == nil {
		r.asyncTasks = make(map[string]*AsyncTask, 0)
	}
	delete(r.asyncTasks, key)
	r.asyncTasks[key] = asyncTask
}

// DeleteAsyncTask 删除异步任务
func (r *Client) DeleteAsyncTask(key string) {
	r.mtx.Lock()
	defer func() {
		r.mtx.Unlock()
	}()
	delete(r.asyncTasks, key)
}

func (r *Client) GetAllAsyncTask() *map[string]*AsyncTask {
	return &r.asyncTasks
}

// MQPacket 与总线交互的数据体
type MQPacket struct {
	FunCode   uint32  // 功能码
	SessionId uint32  // 数据包的sid
	Data      *[]byte // 业务数据体
}

// AsyncTask 异步任务结构体
type AsyncTask struct {
	PacketRsp    chan MQPacket // 总线数据处理通道
	FuncodeRsp   uint32        // 回复功能码
	SerialNumber uint32        // 通信流水号
	Own          *Client
	IsEncrypted  bool // 是否加密

	Rsp     chan rsp.MQBodyRsp // 回调
	doClose sync.Once          // 仅关闭通道一次
}

// Finish 完成
func (r *AsyncTask) Finish() {
	r.doClose.Do(
		func() {
			close(r.Rsp)
			key := fmt.Sprintf("%v_%v_%v", r.Own.SessionID, r.FuncodeRsp, r.SerialNumber)
			r.Own.DeleteAsyncTask(key)
		})
}