package middleware

import (
	"context"
	"github.com/gorilla/sessions"
	"net/http"
	"picgo/configs"
	"picgo/corelib"
	"picgo/data"
	"picgo/model"
	"strings"
)

// LoginMiddleware 登录 // 添加日志中间件到路由器 使用：r.Handle("/", LoginMiddleware(http.HandlerFunc(handler)))
func LoginMiddleware(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		var (
			user    model.SysUser
			err     error
			session *sessions.Session
		)
		resPath := r.URL.Path
		if resPath == "/login" || resPath == "/captcha" || strings.HasPrefix(resPath, "/static") {
			next.ServeHTTP(w, r)
		}
		if session, err = corelib.SessionStore.Get(r, configs.Settings.Server.SessionName); err == nil {

		}
		username, ok := session.Values["username"].(string)
		if !ok || username == "" {
			http.Redirect(w, r, "/login", http.StatusFound)
			return
		}
		if user, err = data.SysUserSelectByUsername(username); err != nil {
			http.Redirect(w, r, "/login", http.StatusFound)
			return
		}
		//  权限判断
		if user.IsSuper != 1 && (resPath != "/" && resPath != "/api/v1/upload") {
			http.Error(w, "没有权限访问", 403)
			return
		}
		ctx := context.WithValue(r.Context(), "username", user.Username)
		next.ServeHTTP(w, r.WithContext(ctx))
	})
}