package middleware

import (
	. "bp.jydev.jianyu360.cn/BaseService/gateway/common/gatecode"
	"bp.jydev.jianyu360.cn/BaseService/gateway/common/httpUtil"
	"bp.jydev.jianyu360.cn/BaseService/gateway/core/proxy/filterPoly"
	"bp.jydev.jianyu360.cn/BaseService/gateway/core/router"
	"fmt"
	"github.com/gogf/gf/v2/net/ghttp"
	"strings"
)

const (
	defaultVerifyPageHtml = "default"
	VerifyPageHtmlSource  = "./resources/antiRes/page/%s.html"
)

var filterPolyManager *filterPoly.Manager

func InitFilterPolyManager() {
	filterPolyManager = filterPoly.InitFilterPolyManager()
}

func FilterPolyHandler(r *ghttp.Request) {
	ctx := r.GetCtx()
	gCtx := router.GetGContext(ctx)
	//获取策略
	poly := filterPolyManager.GetRule(gCtx.RouterRule.LimitPloy)
	status, key := func() (int, string) {
		if gCtx.Sess.UserId != "" && poly.Rule.BCheckId { //id请求频率校验
			return poly.IdFilter(ctx, gCtx.Sess.UserId)
		} else { //ip请求频率校验
			return poly.IpFilter(ctx, r.GetClientIp())
		}
	}()
	returnHtml := false
	if strings.Contains(strings.ToLower(r.Header.Get("Accept")), "html") {
		returnHtml = true
	}
	//是否开启黑名单
	if status == -1 { //黑名单 不响应
		r.SetError(NewErrorWithCode(OTHER_ERR_OFTEN, fmt.Sprintf("请求频繁限制")))
		r.Response.ResponseWriter.WriteHeader(403)
		return
	}
	if status == 2 { //处理验证码逻辑
		rData := poly.VerifyHandle(r.Request, key)
		if !returnHtml {
			r.Response.WriteJsonExit(rData)
		} else {
			if renderErr := httpUtil.Render(r.Response.ResponseWriter, getVerifyPage(poly.Rule.VerifyPage), &rData); renderErr != nil {
				r.SetError(NewErrorWithCode(GATEWAY_HTML_RENDER_ERR, fmt.Sprintf("验证码页面:%v\n", renderErr)))
			}
		}
		return
	}
	r.Middleware.Next()
}

//getVerifyPage 获取验证码页面路径
func getVerifyPage(page string) string {
	if page != "" {
		if strings.HasSuffix(page, ".html") {
			page = strings.ReplaceAll(page, ".html", "")
		}
		return fmt.Sprintf(VerifyPageHtmlSource, page)
	} else {
		return fmt.Sprintf(VerifyPageHtmlSource, defaultVerifyPageHtml)
	}
}