import json
import os


def user_add(new_user, new_password):
    """Dodaje nowego użytkownika lub aktualizuje hasło"""
    file_path = "file.json"

    # Wczytanie pliku JSON
    if os.path.exists(file_path):
        with open(file_path, "r") as f:
            try:
                data = json.load(f)
            except json.JSONDecodeError:
                data = {"users": []}
    else:
        data = {"users": []}

    # Sprawdź czy użytkownik już istnieje
    for entry in data["users"]:
        if entry.get("user") == new_user:
            # Aktualizuj hasło
            entry["password"] = new_password
            with open(file_path, "w") as f:
                json.dump(data, f, indent=4)
            return False  # Zaktualizowano

    # Dodaj nowego użytkownika
    new_entry = {"user": new_user, "password": new_password}
    data["users"].append(new_entry)

    # Zapis do pliku JSON
    with open(file_path, "w") as f:
        json.dump(data, f, indent=4)
    return True  # Dodano nowego


def is_person(user_to_find):
    """Sprawdza czy użytkownik istnieje - zwraca 1 lub 0"""
    file_path = "file.json"

    try:
        with open(file_path, "r") as f:
            data = json.load(f)
    except (FileNotFoundError, json.JSONDecodeError):
        return 0

    for entry in data.get("users", []):
        if entry.get("user") == user_to_find:
            return 1
    return 0


def verify_password(user_to_check, password_to_check):
    """Sprawdza hasło bez usuwania użytkownika"""
    file_path = "file.json"

    try:
        with open(file_path, "r") as f:
            data = json.load(f)
    except (FileNotFoundError, json.JSONDecodeError):
        return False

    for entry in data.get("users", []):
        if entry.get("user") == user_to_check:
            return entry.get("password") == password_to_check

    return False


def get_user_data(user_to_find):
    """Pobiera dane użytkownika bez usuwania"""
    file_path = "file.json"

    try:
        with open(file_path, "r") as f:
            data = json.load(f)
    except (FileNotFoundError, json.JSONDecodeError):
        return None

    for entry in data.get("users", []):
        if entry.get("user") == user_to_find:
            return {"user": entry["user"], "password": entry["password"]}

    return None


def get_all_users():
    """Zwraca listę wszystkich użytkowników"""
    file_path = "file.json"

    try:
        with open(file_path, "r") as f:
            data = json.load(f)
    except (FileNotFoundError, json.JSONDecodeError):
        return []

    return data.get("users", [])


def delete_user(user_to_delete):
    """Usuwa użytkownika z bazy"""
    file_path = "file.json"

    try:
        with open(file_path, "r") as f:
            data = json.load(f)
    except (FileNotFoundError, json.JSONDecodeError):
        return False

    for i, entry in enumerate(data.get("users", [])):
        if entry.get("user") == user_to_delete:
            data["users"].pop(i)
            with open(file_path, "w") as f:
                json.dump(data, f, indent=4)
            return True

    return False