// Package middleware ...
//
// Description : middleware ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022-06-25 23:07
package middleware

import (
	"fmt"
	"strings"
	"time"

	"git.zhangdeman.cn/zhangdeman/wrapper"

	"git.zhangdeman.cn/zhangdeman/gin/define"

	networkUtil "git.zhangdeman.cn/zhangdeman/network/util"
	"github.com/gin-gonic/gin"
)

// InitRequest 初始化请求
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 23:08 2022/6/25
func InitRequest() gin.HandlerFunc {
	return func(ctx *gin.Context) {
		traceID := getTraceID(ctx)
		requestID := getRequestID(ctx, traceID)
		ctx.Set(define.TraceIDField, traceID)
		ctx.Set(define.RequestIDField, requestID)
		ctx.Set(define.StartRequestTimeField, time.Now())
		ctx.Next()
	}
}

// getTraceID 生成traceID
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 23:12 2022/6/25
func getTraceID(ctx *gin.Context) string {
	return fmt.Sprintf(
		"%v-%v-%v-%v",
		time.Now().UnixNano()/1e6,
		strings.ReplaceAll(networkUtil.IP.GetHostIP(), ".", ""),
		strings.ReplaceAll(networkUtil.IP.GetRemoteIP(ctx.Request), ".", ""),
		wrapper.StringFromRandom(32, "").Md5().Value,
	)
}

// getRequestID 生成requestID
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 23:12 2022/6/25
func getRequestID(ctx *gin.Context, traceID string) string {
	requestID := ctx.GetHeader("X-Forward-Request-ID")
	if len(requestID) > 0 {
		return requestID
	}
	if len(traceID) > 0 {
		return traceID
	}
	return getTraceID(ctx)
}