import json
import os
from hashlib import sha256
import gradio as gr


def save_user_data_to_json(user, file_path='users.json'):
    username = user['name']
    # Load existing data
    if os.path.exists(file_path):
        with open(file_path, 'r') as file:
            try:
                existing_data = json.load(file)
            except json.JSONDecodeError:
                existing_data = {}
    else:
        existing_data = {}

    
    existing_data[username] = user

    # Save updated data back to file
    with open(file_path, 'w') as file:
        json.dump(existing_data, file, indent=4)

def load_from_json(file_path='users.json'):
    """
    Load user data from a JSON file and return it as a dictionary.

    :param file_path: The path to the JSON file from which to load user data.
    :return: A dictionary containing the user data loaded from the JSON file.
    """
    if os.path.exists(file_path):
        with open(file_path, 'r') as file:
            try:
                user_data = json.load(file)
                return user_data
            except json.JSONDecodeError as e:
                print(f"Error decoding JSON from {file_path}: {e}")
                return {}
    else:
        print(f"File {file_path} not found.")
        return {}


def add_user_pref(user, input_value, input_type='keywords'):

    if not user['history']:
        user['history'] = {"keywords": [], "prompts": []}

    for word in input_value:
        if word not in user['history'][input_type]:
            user['history'][input_type].append(word)
    return user


def update_json(user, prompt, keywords):
    username = user['name']
    users = load_from_json()
    user = users.get(username)

    print(f"TYPE PROMPT = {type(prompt)}")
    

    if username != 'Guest':
        user = add_user_pref(user, prompt, input_type='prompts')
        user = add_user_pref(user, keywords, input_type='keywords')
        save_user_data_to_json(user)

        # with open('users.json', 'r') as file:
        #     saved_data = json.load(file)

    users = load_from_json()
    user = users.get(username)
    return gr.update(choices=user['history']['prompts']), gr.update(choices=user['history']['keywords']), user

def auth_user(username, password):
    users = load_from_json()
    if username in users and sha256(password.encode()).hexdigest() == users[username]['hashed_password']:
        user = users.get(username)
    else:
        username = 'Guest'
        user = users.get(username)
    return user, f"## Hi {username}!", gr.update(choices=user['history']['prompts']), gr.update(choices=user['history']['keywords'])

def logout():
    username = 'Guest'
    user = users.get(username)
    return user, f"## Hi {username}!", gr.update(choices=user['history']['prompts']), gr.update(choices=user['history']['keywords'])