diff --git a/main.py b/main.py
index 06c9fde..b40c7f2 100644
--- a/main.py
+++ b/main.py
@@ -3,49 +3,124 @@ from bs4 import BeautifulSoup
 import requests
 from simple_term_menu import TerminalMenu
 import os
+import sys
 import subprocess
+from operator import itemgetter
 
-db = TinyDB("./database.json", indent=4)
-query = Query()
+def get_files(url: str) -> []:
+    if (url in ["/../", "../"]):
+        return ([])
+    response = requests.get(url)
+    # print("connection:", response.reason)
+    if (response.status_code != 200):
+        exit
+    soup = BeautifulSoup(response.text, 'html.parser')
+    files = []
+    for element in soup.findAll("a"):
+        file = {}
+        file.update({"name": element.text})
+        file.update({"link": element["href"]})
+        files.append(file)
+    return (files)
 
-sites = db.table("sites")
-nb_sites = len(sites.all());
-site_choose = 0;
-if (nb_sites == 0):
+def get_uri(url: str) -> []:
+    if (url in ["/../", "../"]):
+        return ([])
+    response = requests.get(url)
+    # print("connection:", response.reason)
+    if (response.status_code != 200):
+        exit
+    soup = BeautifulSoup(response.text, 'html.parser')
+    return(soup.find("h1").text[9:])
+
+def get(files: [], key: str):
+    names = []
+    for file in files:
+        names.append(file.get(key))
+    return (names)
+
+def open_vlc(url: str) -> None:
+    with open(os.devnull, 'wb') as devnull:
+        subprocess.check_call(['vlc', url], stdout=devnull, stderr=subprocess.STDOUT)
+
+def preview(filename: str) -> str:
+    if (not filename.endswith("/")):
+        return (None)
+    files = get_files(url + filename)
+    return ("\n".join(get(files, "name")))
+
+def files_navigator():
+    global url
+    path = cookies.get("path")
+    if (path):
+        url + path
+    else:
+        path = "/"
+    while True:
+        cookies.update({"last_path": path})
+        db.update({"last_path", path})
+        files = get_files(url)
+        terminal_menu = TerminalMenu(get(files, "name"), preview_command=preview, preview_size=0.3, show_search_hint=True, title=get_uri(url))
+        file_choose = terminal_menu.show()
+        if (file_choose == None):
+            sys.exit(0)
+        elif (file_choose == 0 and get_uri(url) == "/"):
+            return 
+        file = get(files, "link")[file_choose]
+        if (not file.endswith("/")):
+            open_vlc(url + file)
+        else:
+            url = url + file
+
+def add_site():
     print("add a site:")
     site = {}
     site.update({"url": input("url:")})
     site.update({"user": input("user(leave blank):")})
     site.update({"password": input("password(leave blank):")})
+    site.update({"id": len(sites_table.all)})
     name = input("name[url] :")
     if (name == ""):
         name = site.get("url")
     site.update({"name": name})
-    sites.insert(site)
-elif (nb_sites != 1):
-    lst = []
-    for site in sites.all():
-        append(sites.get("name"))
-    terminal_menu = TerminalMenu(lst)
-    site_choose = terminal_menu.show()
-site = sites.all()[site_choose]
-if (site.get("user") and site.get("password")):
-    url = f"http://{site.get('user')}:{site.get('password')}@{site.get('url')}/"
-else:
-    url = f"http://{site.get('url')}/";
-while True:
-    response = requests.get(url)
-    print("connection:", response.reason)
-    if (response.status_code != 200):
-        exit
-    soup = BeautifulSoup(response.text, 'html.parser')
-    lst = []
-    for element in soup.findAll("a"):
-        lst.append(element.text)
-    terminal_menu = TerminalMenu(lst)
-    file = soup.findAll("a")[terminal_menu.show()]["href"]
-    if (not file.endswith("/")):
-        with open(os.devnull, 'wb') as devnull:
-            subprocess.check_call(['vlc', url + file], stdout=devnull, stderr=subprocess.STDOUT)
+    sites_table.insert(site)
+
+def set_url(site):
+    global url
+
+    cookies.update({"last_site": site})
+    if (site.get("user") and site.get("password")):
+        url = f"http://{site.get('user')}:{site.get('password')}@{site.get('url')}/"
     else:
-        url = url + file
+        url = f"http://{site.get('url')}/";
+
+def sites_navigator():
+    if (len(sites_table.all()) == 0):
+        add_site()
+    site = cookies.get("last_site")
+    if (site):
+        set_url(site)
+        files_navigator()
+    while True:
+        terminal_menu = TerminalMenu(get(sites_table.all(), "name") + ["", "add", "edit", "remove"], skip_empty_entries=True, show_search_hint=True)
+        choose = terminal_menu.show()
+        if (choose == len(sites_table.all()) + 1):
+            add_site();
+        elif (choose == len(sites_table.all()) + 2):
+            pass
+        elif (choose == len(sites_table.all()) + 3):
+            pass
+        else:
+            set_url(sites_table.all()[choose])
+            db.update({"last_path", get_uri(url)})
+            files_navigator()
+
+db = TinyDB("./database.json", indent=4)
+query = Query()
+
+sites_table = db.table("sites")
+cookies_table = db.table("cookies")
+if (len(cookies_table.all()) == 0):
+    cookies_table.insert({"id": 0})    
+cookies = cookies_table.all()[0]
+sites_navigator();