package request

import (
	"context"
	"io"
	"lone-services/pkg/utils"
	"net/http"
	"net/url"
	"strconv"
	"strings"

	"google.golang.org/grpc"
	"google.golang.org/grpc/metadata"
)

type ctxKey string

const (
	CtxUserId       ctxKey = "X-User-Id"
	CtxUserName     ctxKey = "X-User-Name"
	CtxRefresh      ctxKey = "X-Refresh"
	CtxClientIP     ctxKey = "X-Client-Ip"
	CtxUserAgent    ctxKey = "X-User-Agent"
	CtxClientCode   ctxKey = "X-Client-Code"
	CtxSaleId       ctxKey = "X-Sale-Id"
	CtxSaleName     ctxKey = "X-Sale-Name"
	CtxSaleMobile   ctxKey = "X-Sale-Mobile"
	CtxSaleProvince ctxKey = "X-Sale-Province"
	CtxStoreId      ctxKey = "X-Store-Id"
	CtxStoreName    ctxKey = "X-Store-Name"
	CtxGroupId      ctxKey = "X-Group-Id"
	CtxGroupName    ctxKey = "X-Group-Name"
	CtxUserType     ctxKey = "X-User-Type"
	CtxRawBody      ctxKey = "X-Raw-Body"
)

var callbackPrefixes = []string{
	"/api/v3/express/",
	"/api/v3/other1/",
	"/api/v3/other2/",
}

type UserInfo struct {
	ID           int64
	Name         string
	RawUID       string
	Refresh      string
	ClientIP     string
	UserAgent    string
	Type         string
	ClientCode   string
	SaleId       string
	SaleName     string
	SaleMobile   string
	SaleProvince string
	StoreId      string
	StoreName    string
	GroupId      string
	GroupName    string
	RawBody      string
	Valid        bool
}

func GetUserInfo(ctx context.Context) UserInfo {
	rawUID, _ := ctx.Value(CtxUserId).(string)
	name, _ := ctx.Value(CtxUserName).(string)
	refresh, _ := ctx.Value(CtxRefresh).(string)
	clientIP, _ := ctx.Value(CtxClientIP).(string)
	userAgent, _ := ctx.Value(CtxUserAgent).(string)
	userType, _ := ctx.Value(CtxUserType).(string)
	clientCode, _ := ctx.Value(CtxClientCode).(string)
	saleId, _ := ctx.Value(CtxSaleId).(string)
	saleName, _ := ctx.Value(CtxSaleName).(string)
	saleMobile, _ := ctx.Value(CtxSaleMobile).(string)
	saleProvince, _ := ctx.Value(CtxSaleProvince).(string)
	storeId, _ := ctx.Value(CtxStoreId).(string)
	storeName, _ := ctx.Value(CtxStoreName).(string)
	groupId, _ := ctx.Value(CtxGroupId).(string)
	groupName, _ := ctx.Value(CtxGroupName).(string)
	rawBody, _ := ctx.Value(CtxRawBody).(string)

	info := UserInfo{
		RawUID:       rawUID,
		Name:         name,
		Refresh:      refresh,
		ClientIP:     clientIP,
		UserAgent:    userAgent,
		Type:         userType,
		ClientCode:   clientCode,
		SaleId:       saleId,
		SaleName:     saleName,
		SaleMobile:   saleMobile,
		SaleProvince: saleProvince,
		StoreId:      storeId,
		StoreName:    storeName,
		GroupId:      groupId,
		GroupName:    groupName,
		RawBody:      rawBody,
	}
	if rawUID == "" {
		return info
	}
	uid, err := strconv.ParseInt(rawUID, 10, 64)
	if err != nil {
		info.Valid = false
		return info
	}
	info.ID = uid
	info.Valid = true
	return info
}

func getRealClientIP(r *http.Request) string {
	xff := r.Header.Get("X-Forwarded-For")
	if xff != "" {
		return xff
	}
	xri := r.Header.Get("X-Real-Ip")
	if xri != "" {
		return xri
	}
	return r.RemoteAddr
}

// UserReadMiddleware
/** 增加透传的方法
 * 1、这里加上代码
 * 2、UserClientInterceptor这个方法里也要写相应的代码对可以
 */
func UserReadMiddleware(next http.HandlerFunc) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {

		newCtx := r.Context()
		body, _ := io.ReadAll(r.Body)
		newCtx = context.WithValue(newCtx, CtxRawBody, string(body))
		newCtx = context.WithValue(newCtx, CtxUserId, r.Header.Get("X-User-Id"))
		newCtx = context.WithValue(newCtx, CtxUserName, r.Header.Get("X-User-Name"))
		newCtx = context.WithValue(newCtx, CtxRefresh, r.Header.Get("X-Refresh"))
		newCtx = context.WithValue(newCtx, CtxClientIP, getRealClientIP(r))
		newCtx = context.WithValue(newCtx, CtxUserAgent, r.UserAgent())
		newCtx = context.WithValue(newCtx, CtxUserType, r.Header.Get("X-User-Type"))
		newCtx = context.WithValue(newCtx, CtxClientCode, r.Header.Get("X-Client-Code"))
		newCtx = context.WithValue(newCtx, CtxSaleId, r.Header.Get("X-Sale-Id"))
		newCtx = context.WithValue(newCtx, CtxSaleName, r.Header.Get("X-Sale-Name"))
		newCtx = context.WithValue(newCtx, CtxSaleMobile, r.Header.Get("X-Sale-Mobile"))
		newCtx = context.WithValue(newCtx, CtxSaleProvince, r.Header.Get("X-Sale-Province"))
		newCtx = context.WithValue(newCtx, CtxStoreId, r.Header.Get("X-Store-Id"))
		newCtx = context.WithValue(newCtx, CtxStoreName, r.Header.Get("X-Store-Name"))
		newCtx = context.WithValue(newCtx, CtxGroupId, r.Header.Get("X-Group-Id"))
		newCtx = context.WithValue(newCtx, CtxGroupName, r.Header.Get("X-Group-Name"))
		next(w, r.WithContext(newCtx))
	}
}

func isCallbackPath(path string) bool {
	for _, prefix := range callbackPrefixes {
		if strings.HasPrefix(path, prefix) {
			return true
		}
	}
	return false
}

func setMDIfNotEmpty(md metadata.MD, key, value string) {
	if value != utils.StringEmpty {
		md.Set(key, value)
	}
}

func UserClientInterceptor(ctx context.Context, method string, req, reply any, cc *grpc.ClientConn, invoker grpc.UnaryInvoker, opts ...grpc.CallOption) error {
	user := GetUserInfo(ctx)
	md := metadata.New(map[string]string{})

	if user.Valid {
		md.Set("x-user-id", user.RawUID)
		md.Set("x-user-name", url.QueryEscape(user.Name))
	}

	setMDIfNotEmpty(md, "x-raw-body", user.RawBody)
	setMDIfNotEmpty(md, "x-refresh", user.Refresh)
	setMDIfNotEmpty(md, "x-client-ip", user.ClientIP)
	if user.UserAgent != utils.StringEmpty {
		md.Set("x-user-agent", url.QueryEscape(user.UserAgent))
	}
	setMDIfNotEmpty(md, "x-user-type", user.Type)
	setMDIfNotEmpty(md, "x-client-code", user.ClientCode)
	setMDIfNotEmpty(md, "x-sale-id", user.SaleId)
	if user.SaleName != utils.StringEmpty {
		md.Set("x-sale-name", url.QueryEscape(user.SaleName))
	}
	setMDIfNotEmpty(md, "x-sale-mobile", user.SaleMobile)
	setMDIfNotEmpty(md, "x-sale-province", user.SaleProvince)
	setMDIfNotEmpty(md, "x-store-id", user.StoreId)
	if user.StoreName != utils.StringEmpty {
		md.Set("x-store-name", url.QueryEscape(user.StoreName))
	}
	setMDIfNotEmpty(md, "x-group-id", user.GroupId)
	if user.GroupName != utils.StringEmpty {
		md.Set("x-group-name", url.QueryEscape(user.GroupName))
	}

	ctx = metadata.NewOutgoingContext(ctx, md)
	return invoker(ctx, method, req, reply, cc, opts...)
}