// package middleware
// @Link  https://github.com/xiujiecn/xiu-admin
// @Copyright  Copyright (c) 2025 LiXiujie
// @Author  Lxj <xxx@example.com>
// @License  https://github.com/xiujiecn/xiu-admin/blob/master/LICENSE
package middleware

import (
	"context"
	"net/http"
	"slices"

	"github.com/gogf/gf/v2/errors/gcode"
	"github.com/gogf/gf/v2/errors/gerror"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/net/ghttp"
	"github.com/gogf/gf/v2/util/gmeta"

	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/pub/xjpubconsts"
	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/pub/xjpubmodel/response"
	"git.5iot.com/iotlcm-public/iotlcm-upstream-proxy/internal/pub/xjpubservice"
)

type sMiddleware struct {
}

func New() *sMiddleware {
	return &sMiddleware{}
}

func init() {
	xjpubservice.RegisterMiddleware(New())
}

func getContentType(r *ghttp.Request) (contentType string) {
	contentType = r.Response.Header().Get("Content-Type")
	if contentType != "" {
		return
	}

	mime := gmeta.Get(r.GetHandlerResponse(), "mime").String()
	if mime == "" {
		contentType = xjpubconsts.HTTPContentTypeJson
	} else {
		contentType = mime
	}
	return
}

// 响应处理中间件
func (m *sMiddleware) ResponseHandler(r *ghttp.Request) {
	r.Middleware.Next()
	if r.Response.BufferLength() > 0 {
		return
	}

	contentType := getContentType(r)
	if contentType == xjpubconsts.HTTPContentTypeExcel {
		r.Response.Status = http.StatusOK
		return
	}
	// g.Log().Infof(r.GetCtx(), "sMiddleware.ResponseHandler,contentType %v", contentType)
	err := r.GetError()
	res := r.GetHandlerResponse()
	var code gcode.Code = gcode.CodeOK

	if err != nil {
		code = gerror.Code(err)
		if code == gcode.CodeNil {
			code = gcode.CodeInternalError
		}
		response.JsonExit(r, code.Code(), err.Error())
	} else {
		response.Json(r, code.Code(), "", res)
	}
}

// CORS 跨域处理
func (s *sMiddleware) CORS(r *ghttp.Request) {
	r.SetCtx(r.GetNeverDoneCtx())

	corsOptions := r.Response.DefaultCORSOptions()
	corsConfig := g.Cfg().MustGet(context.Background(), "server.allowedDomains").Strings()
	if len(corsConfig) == 0 {
		r.Response.CORSDefault()
	} else {
		corsOptions.AllowDomain = corsConfig
		r.Response.CORS(corsOptions)
	}
	r.Middleware.Next()
}

// IsExceptLogin 判断是否需要验证登录
func (s *sMiddleware) IsExceptLogin(ctx context.Context, path string) bool {
	pathList := g.Cfg().MustGet(ctx, "router.exceptLogin").Strings()
	return slices.Contains(pathList, path)
}

// ResponseHandlerRaw 返回处理中间件
func (s *sMiddleware) ResponseHandlerRaw(r *ghttp.Request) {
	r.Middleware.Next()
	// 如果已经有返回内容，那么该中间件什么也不做
	if r.Response.BufferLength() > 0 {
		g.Log().Infof(r.Context(), "ResponseHandler r.Response.BufferLength()  %d buf:%s", r.Response.BufferLength(), r.Response.BufferString())
		return
	}

	var (
		err = r.GetError()
		res = r.GetHandlerResponse()
	)
	if err != nil {
		r.Response.WriteJson(res)
		r.ExitAll()
	} else {
		r.Response.WriteJson(res)
	}
}