print("newcmd setup start.")
# init
print("importing modules")
try:
    import ast
    import hashlib
    from simplecrypt import encrypt, decrypt
    from copy import deepcopy
    import sys
except ModuleNotFoundError:
    print("error: some modules are missing or not being found")
print("done")
print("loading users")
users = open("ressources/users", 'r')
users = users.read()
users = ast.literal_eval(users)
userslen = len(users)
usersdata = {}
if userslen != 0:
    errorcount = 0
    sucesscount = 0
    for i in range(len(users)):
        try:
            tempuser = users[i]
            usersdata[tempuser["name"]] = tempuser
            sucesscount += 1
        except:
            errorcount += 1
    print("loading users done. {} users failed to load {} users loaded correctly".format(errorcount, sucesscount))
else:
    print("no users found")
# define's
def login(user, password):
    backuser = user
    h = hashlib.new('sha256')
    h.update(password.encode())
    h = h.hexdigest()
    if h == user["pass"]:
        decrypted = decrypt(h, user["data"])
        backuser["data"] = ast.literal_eval(decrypted.decode('utf-8'))
        backuser["pass"] = h
        return backuser
    else:
        return False

def updateusersfile(user):
    global users
    user1 = deepcopy(user)
    user1["data"] = encrypt(user1["pass"], str(user1["data"]).encode())
    users[user1["name"]] = user1
    usersfile = {}
    for i in range(len(users)):
        usersfile[i] = list(users.values())[i]
    file = open("ressources/users", 'w')
    file.write(str(usersfile))
    file.close()

def createnewaccount(right):
    name = input("enter name for your new user: ")
    password = input("enter password for your new user: ")
    back = {}
    back["name"] = name
    h = hashlib.new('sha256')
    h.update(password.encode())
    h = h.hexdigest()
    back["pass"] = h
    back["data"] = {"rights": right, "files": {}}
    updateusersfile(back)
    return back

def cd(command):
    global currentdir
    if currentdir == currentdir:
        if len(command) != 1:
            if command[1] != "..":
                if command[1] in user["data"]["files"]:
                    currentdir = command[1]
                else:
                    print("error in cd: directory '{}' not existing".format(command[1]))
            else:
                currentdir = ""
        else:
            print("error in cd: cd requires 1 argument")

def ls():
    if currentdir != "":
        back = str(user["data"]["files"][currentdir].keys())
        back = back.replace("dict_keys([", "")
        back = back.replace("])", "")
        print(back)
    else:
        back = str(user["data"]["files"].keys())
        back = back.replace("dict_keys([", "")
        back = back.replace("])", "")
        print(back)

def createdir(command):
    if len(command) != 1:
        user["data"]["files"][command[1]] = {}
        updateusersfile(user)
    else:
        print("error in createdir: createdir requires 1 argument")

def remove(command):
    if len(command) != 1:
        if command[1] in user["data"]["files"]:
            del user["data"]["files"][command[1]]
            updateusersfile(user)
        else:
            print("error in removedir: directory {} is not existing".format(command[1]))
    else:
        print("error in removedir: removedir requires 1 argument")

def createfile(command):
    if len(command) != 1:
        user["data"]["files"][command[1]] = ""
        updateusersfile(user)
    else:
        print("error in createfile: createfile requires 1 argument")

def editfile(command):
    if len(command) != 1:
        if currentdir != "":
            if command[1] in user["data"]["files"][currentdir]:
                towrite = sys.stdin.read()
                while not "exit:editor" in towrite:
                    print(towrite)
                towrite = towrite.replace("exit:editor", "")
                user["data"]["files"][currentdir][command[1]] = towrite
            else:
                print("error in editfile: file {} not found".format(command[1]))
        else:
            if command[1] in user["data"]["files"]:
                towrite = sys.stdin.readlines()
                while not "exit:editor" in towrite:
                    print(towrite)
                towrite = towrite.replace("exit:editor", "")
                user["data"]["files"][command[1]] = towrite
            else:
                print("error in editfile: file {} not found".format(command[1]))
    else:
        print("error in editfile: editfile requires 1 argument")
# login
if userslen != 0:
    count = 0
    for i in usersdata:
        count += 1
        print("{}: {}".format(count, i))
    userin = int(input("please enter target user to login by number: "))
    if 1 <= userin <= count:
        back = False
        while back == False:
            password = input("please enter password for {}: ".format(list(usersdata.keys())[userin-1]))
            back = login(list(usersdata.values())[userin-1], password)
        user = back
else:
    user = createnewaccount("Admin")
#main
currentdir = ""
while True:
    command = input("{}: ".format(currentdir))
    command = command.split()
    if len(command) != 0:
        if command[0] == "cd":
            cd(command)
        elif command[0] == "ls":
            ls()
        elif command[0] == "createdir":
            createdir(command)
        elif command[0] == "remove":
            remove(command)
        elif command[0] == "createfile":
            createfile(command)
        elif command[0] == "editfile":
            editfile(command)
        else:
            print("unknown command: {}".format(command[0]))