package lib

import (
	"encoding/json"
	"github.com/nats-io/nats.go"
	"runtime"
	"strconv"
	"strings"
)

var Nats *nats.Conn

type JSONS struct {
	//必须的大写开头
	Code int16
	Msg  string
	Data interface{} // 泛型
}

func To_string(value interface{}) string {
	var key string
	if value == nil {
		return key
	}

	switch value.(type) {
	case float64:
		ft := value.(float64)
		key = strconv.FormatFloat(ft, 'f', -1, 64)
	case float32:
		ft := value.(float32)
		key = strconv.FormatFloat(float64(ft), 'f', -1, 64)
	case int:
		it := value.(int)
		key = strconv.Itoa(it)
	case uint:
		it := value.(uint)
		key = strconv.Itoa(int(it))
	case int8:
		it := value.(int8)
		key = strconv.Itoa(int(it))
	case uint8:
		it := value.(uint8)
		key = strconv.Itoa(int(it))
	case int16:
		it := value.(int16)
		key = strconv.Itoa(int(it))
	case uint16:
		it := value.(uint16)
		key = strconv.Itoa(int(it))
	case int32:
		it := value.(int32)
		key = strconv.Itoa(int(it))
	case uint32:
		it := value.(uint32)
		key = strconv.Itoa(int(it))
	case int64:
		it := value.(int64)
		key = strconv.FormatInt(it, 10)
	case uint64:
		it := value.(uint64)
		key = strconv.FormatUint(it, 10)
	case string:
		key = value.(string)
	case []byte:
		key = string(value.([]byte))
	default:
		newValue, _ := json.Marshal(value)
		key = string(newValue)
	}
	return key
}

func To_int(value interface{}) int {
	var key int
	if value == nil {
		return key
	}
	switch value.(type) {
	case float64:
		key = int(value.(float64))
	case float32:
		key = int(value.(float32))
	case int:
		key = int(value.(int))
	case uint:
		key = int(value.(uint))
	case int8:
		key = int(value.(int8))
	case uint8:
		key = int(value.(uint8))
	case int16:
		key = int(value.(int16))
	case uint16:
		key = int(value.(uint16))
	case int32:
		key = int(value.(int32))
	case uint32:
		key = int(value.(uint32))
	case int64:
		key = int(value.(int64))
	case uint64:
		key = int(value.(uint64))
	case string:
		key, _ = strconv.Atoi(value.(string))
	case []byte:
		key, _ = strconv.Atoi(string(value.([]byte)))
	default:
		newValue, _ := json.Marshal(value)
		key, _ = strconv.Atoi(string(newValue))
	}
	return key
}

// 取文本（字符串）中间
func GetBetweenStr(str, start, end string) string {
	n := strings.Index(str, start)
	if n == -1 {
		n = 0
	} else {
		n = n + len(start) // 增加了else，不加的会把start带上
	}
	str = string([]byte(str)[n:])
	m := strings.Index(str, end)
	if m == -1 {
		m = len(str)
	}
	str = string([]byte(str)[:m])
	return str
}

// 获取正在运行的函数名
func FuncName() string {
	pc := make([]uintptr, 1)
	runtime.Callers(2, pc)
	f := runtime.FuncForPC(pc[0])
	return f.Name()
}