// Package middleware
// @Link  https://github.com/bufanyun/hotgo
// @Copyright  Copyright (c) 2023 HotGo CLI
// @Author  Ms <133814250@qq.com>
// @License  https://github.com/bufanyun/hotgo/blob/master/LICENSE
package middleware

import (
	"context"
	"fmt"
	"github.com/gogf/gf/v2/encoding/gjson"
	"github.com/gogf/gf/v2/frame/g"
	"github.com/gogf/gf/v2/net/ghttp"
	"github.com/gogf/gf/v2/os/gctx"
	"hotgo/internal/consts"
	"hotgo/internal/library/contexts"
	"hotgo/internal/library/token"
	"hotgo/internal/model"
	"hotgo/internal/service"
	"hotgo/utility/validate"
	"strings"
	"sync"
)

type sMiddleware struct {
	LoginUrl         string                      // 登录路由地址
	NotRecordRequest g.Map                       // 不记录请求数据的路由（当前请求数据过大时会影响响应效率，可以将路径放到该选项中改善）
	FilterRoutes     map[string]ghttp.RouterItem // 支持预处理的web路由
	routeMutex       sync.Mutex
}

func init() {
	service.RegisterMiddleware(NewMiddleware())
}

func NewMiddleware() *sMiddleware {
	return &sMiddleware{
		NotRecordRequest: g.Map{
			"/api/goview/project/upload": struct{}{}, // 上传文件
		},
	}
}

// Ctx 初始化请求上下文
func (s *sMiddleware) Ctx(r *ghttp.Request) {
	data := make(g.Map)
	if _, ok := s.NotRecordRequest[r.URL.Path]; ok {
		data["request.body"] = gjson.New(nil)
	} else {
		data["request.body"] = gjson.New(r.GetBodyString())
	}

	contexts.Init(r, &model.Context{
		Data:   data,
		Module: getModule(r.URL.Path),
	})

	if len(r.Cookie.GetSessionId()) == 0 {
		r.Cookie.SetSessionId(gctx.CtxId(r.Context()))
	}
	r.Middleware.Next()
}

func getModule(path string) (module string) {
	slice := strings.Split(path, "/")
	if len(slice) < 2 {
		module = consts.AppDefault
		return
	}

	if slice[1] == "" {
		module = consts.AppDefault
		return
	}
	return slice[1]
}

// CORS allows Cross-origin resource sharing.
func (s *sMiddleware) CORS(r *ghttp.Request) {
	r.Response.CORSDefault()
	r.Middleware.Next()
}

// DeliverUserContext 将用户信息传递到上下文中
func (s *sMiddleware) DeliverUserContext(r *ghttp.Request) (err error) {
	user, err := token.ParseLoginUser(r)
	if err != nil {
		return
	}

	switch user.App {
	case consts.AppAdmin:
		if err = service.AdminSite().BindUserContext(r.Context(), user); err != nil {
			return
		}
	default:
		contexts.SetUser(r.Context(), user)
	}
	return
}

// IsExceptAuth 是否是不需要验证权限的路由地址
func (s *sMiddleware) IsExceptAuth(ctx context.Context, appName, path string) bool {
	pathList := g.Cfg().MustGet(ctx, fmt.Sprintf("router.%v.exceptAuth", appName)).Strings()

	for i := 0; i < len(pathList); i++ {
		if validate.InSliceExistStr(pathList[i], path) {
			return true
		}
	}
	return false
}

// IsExceptLogin 是否是不需要登录的路由地址
func (s *sMiddleware) IsExceptLogin(ctx context.Context, appName, path string) bool {
	pathList := g.Cfg().MustGet(ctx, fmt.Sprintf("router.%v.exceptLogin", appName)).Strings()
	for i := 0; i < len(pathList); i++ {
		if validate.InSliceExistStr(pathList[i], path) {
			return true
		}
	}
	return false
}