package basic

import (
	"errors"
	"fusenapi/fsm"
	"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"
)

var DefaultJwtSecret uint64 = 21321321321

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 RequestParse(w http.ResponseWriter, r *http.Request, state *fsm.SharedState, LogicRequest any) (*auth.UserInfo, error) {

	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
	}

	var secret uint64 = 0
	if info.IsUser() {
		us, err := state.GetUserState(info.UserId) //获取缓存的用户状态
		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 = DefaultJwtSecret //获取默认的hash
	}

	var userinfo *auth.UserInfo
	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 {
			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 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 {
				httpx.OkJsonCtx(r.Context(), w, &Response{
					Code:    401,
					Message: "unauthorized",
				})
				logx.Info("unauthorized:", err.Error())
				return nil, err
			}
		}
	} else {
		// 白板用户
		userinfo = &auth.UserInfo{UserId: 0, GuestId: 0}
	}

	// 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
	}

	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
}