package basic

import (
	"errors"
	"fmt"
	"log"
	"strconv"

	"fusenapi/shared"
	"fusenapi/utils/auth"
	"net/http"
	"reflect"

	"github.com/golang-jwt/jwt"
	"github.com/zeromicro/go-zero/core/logx"
	"github.com/zeromicro/go-zero/rest/httpx"
	"gorm.io/gorm"
)

type IJWTParse interface {
	ParseJwtToken(r *http.Request) (jwt.MapClaims, error)
}

func BeforeLogic(w http.ResponseWriter, r *http.Request, l reflect.Value) (isNext bool) {

	m := l.MethodByName("BeforeLogic")
	if m.IsValid() {
		result := m.Call([]reflect.Value{reflect.ValueOf(w), reflect.ValueOf(r)})
		if len(result) != 0 {
			return false
		}
	}
	return true
}

func AfterLogic(w http.ResponseWriter, r *http.Request, l reflect.Value, resp *Response) bool {

	m := l.MethodByName("AfterLogic")
	if m.IsValid() {
		m.Call([]reflect.Value{reflect.ValueOf(w), reflect.ValueOf(r), reflect.ValueOf(resp)})
		return true
	}
	return false
}

func NormalAfterLogic(w http.ResponseWriter, r *http.Request, resp *Response) {
	// 如果响应不为nil，则使用httpx.OkJsonCtx方法返回JSON响应;
	if resp != nil {
		httpx.OkJsonCtx(r.Context(), w, resp)
	} else {
		err := errors.New("server logic is error, resp must not be nil")
		httpx.ErrorCtx(r.Context(), w, err)
		logx.Error(err)
	}
}

func ParseJwtToken(r *http.Request, svcCtx any) (*auth.UserInfo, error) {
	var userinfo *auth.UserInfo
	var err error
	// log.Println(io.ReadAll(r.Body))
	token := r.Header.Get("Authorization")
	userId, err := strconv.ParseInt(token, 10, 64)
	if err != nil {
		userinfo = &auth.UserInfo{
			UserId: userId,
		}
	} else {
		var secret uint64 = 0

		token, info, err := auth.ParseJwtTokenHeader[auth.UserInfo](r) //解析Token头, 和payload信息
		if err != nil {
			logx.Error(err)
			return nil, err
		}

		if info != nil {

			if info.IsUser() {
				// us, err := state.GetUserState(info.UserId) //获取缓存的用户状态
				reflect.ValueOf(svcCtx)
				ctxValue := reflect.ValueOf(svcCtx).FieldByName("MysqlConn")
				gdb := ctxValue.Interface().(*gorm.DB)

				us, err := shared.GetUserState(info.UserId, gdb)
				if err != nil {
					logx.Error(err)
					return nil, err
				}
				secret = us.PwdHash // 获取密码的hash做jwt, 便于重置密码的使用

			} else if info.IsGuest() {
				secret = auth.DefaultJwtSecret //获取默认的hash
			}
		}

		if secret != 0 {
			claims, err := auth.ParseJwtTokenUint64Secret(token, secret)
			// 如果解析JWT token出错,则返回未授权的JSON响应并记录错误消息
			if err != nil {
				log.Println(token)
				if err != nil {
					return nil, fmt.Errorf("unauthorized")
				}
				return nil, err
			}

			if claims != nil {
				// 从token中获取对应的用户信息
				userinfo, err = auth.GetUserInfoFormMapClaims(claims)
				// 如果获取用户信息出错,则返回未授权的JSON响应并记录错误消息
				if err != nil {
					return nil, fmt.Errorf("unauthorized")
				}
			}
		} else {
			// 白板用户
			userinfo = &auth.UserInfo{UserId: 0, GuestId: 0}
		}
	}

	return userinfo, nil
}

func RequestParse(w http.ResponseWriter, r *http.Request, svcCtx any, LogicRequest any) (*auth.UserInfo, error) {

	// 新的解析jwtToken
	userinfo, err := ParseJwtToken(r, svcCtx)
	if err != nil {
		httpx.OkJsonCtx(r.Context(), w, &Response{
			Code:    510,
			Message: err.Error(),
		})
	}

	// 如果端点有请求结构体，则使用httpx.Parse方法从HTTP请求体中解析请求数据
	if err = httpx.Parse(r, LogicRequest); err != nil {
		httpx.OkJsonCtx(r.Context(), w, &Response{
			Code:    510,
			Message: "parameter error",
		})
		logx.Error(err)
		return nil, err
	}
	// userinfo := &auth.UserInfo{UserId: 39}
	return userinfo, err
}

func RequestParseBackend(w http.ResponseWriter, r *http.Request, svcCtx IJWTParse, LogicRequest any) (userinfo *auth.BackendUserInfo, err error) {

	// 解析JWT token,并对空用户进行判断
	claims, err := svcCtx.ParseJwtToken(r)
	// 如果解析JWT token出错,则返回未授权的JSON响应并记录错误消息
	if err != nil {
		httpx.OkJsonCtx(r.Context(), w, &Response{
			Code:    401,            // 返回401状态码,表示未授权
			Message: "unauthorized", // 返回未授权信息
		})
		logx.Info("unauthorized:", err.Error()) // 记录错误日志
		return
	}

	if claims != nil {
		// 从token中获取对应的用户信息
		userinfo, err = auth.GetBackendUserInfoFormMapClaims(claims)
		// 如果获取用户信息出错,则返回未授权的JSON响应并记录错误消息
		if err != nil {
			httpx.OkJsonCtx(r.Context(), w, &Response{
				Code:    401,
				Message: "unauthorized",
			})
			logx.Info("unauthorized:", err.Error())
			return
		}
	}

	// var req types.RequestGoogleLogin
	// 如果端点有请求结构体，则使用httpx.Parse方法从HTTP请求体中解析请求数据
	if err = httpx.Parse(r, LogicRequest); err != nil {
		httpx.OkJsonCtx(r.Context(), w, &Response{
			Code:    510,
			Message: "parameter error",
		})
		logx.Info(err)
		return
	}

	return userinfo, err
}