import yaml
import sys
import bcrypt
from _arango import ArangoDB
import os
import dotenv
import getpass
import argparse
import string
import secrets
from utils import fix_key
from colorprinter.print_color import *

dotenv.load_dotenv()


def read_yaml(file_path):
    with open(file_path, "r") as file:
        return yaml.safe_load(file)


def write_yaml(file_path, data):
    with open(file_path, "w") as file:
        yaml.safe_dump(data, file)


def add_user(data, username, email, name, password):
    # Check for existing username
    if username in data["credentials"]["usernames"]:
        print(f"Error: Username '{username}' already exists.")
        sys.exit(1)

    # Check for existing email
    for user in data["credentials"]["usernames"].values():
        if user["email"] == email:
            print(f"Error: Email '{email}' already exists.")
            sys.exit(1)

    # Hash the password using bcrypt
    hashed_password = bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt()).decode(
        "utf-8"
    )

    # Add the new user
    data["credentials"]["usernames"][username] = {
        "email": email,
        "name": name,
        "password": hashed_password,
    }


def make_arango(username):
    root_user = os.getenv("ARANGO_ROOT_USER")
    root_password = os.getenv("ARANGO_ROOT_PASSWORD")
    arango = ArangoDB(user=root_user, password=root_password, db_name="_system")

    if not arango.db.has_database(username):
        arango.db.create_database(
            username,
            users=[
                {
                    "username": os.getenv("ARANGO_USER"),
                    "password": os.getenv("ARANGO_PASSWORD"),
                    "active": True,
                    "extra": {},
                }
            ],
        )
    arango = ArangoDB(user=root_user, password=root_password, db_name=username)
    for collection in [
        "projects",
        "favorite_articles",
        "article_collections",
        "settings",
        "chats",
        "notes",
        "other_documents",
        "rss_feeds",
        "interviews",
    ]:
        if not arango.db.has_collection(collection):
            arango.db.create_collection(collection)
    user_arango = ArangoDB(db_name=username)
    user_arango.db.collection("settings").insert(
        {"current_page": "Bot Chat", "current_project": None}
    )


def generate_random_password(length=16):
    characters = string.ascii_letters + string.digits
    password = "-".join(
        "".join(secrets.choice(characters) for _ in range(6)) for _ in range(3)
    )
    return password

def delete_user(data, username):
    # Check if the user exists
    if username not in data["credentials"]["usernames"]:
        print(f"Error: Username '{username}' does not exist.")
        sys.exit(1)

    # Remove the user from the YAML data
    del data["credentials"]["usernames"][username]

    # Remove the user's database in ArangoDB
    root_user = os.getenv("ARANGO_ROOT_USER")
    root_password = os.getenv("ARANGO_ROOT_PASSWORD")
    base_arango = ArangoDB(user=root_user, password=root_password, db_name="base")
    # Remove the user's database in ArangoDB
    root_user = os.getenv("ARANGO_ROOT_USER")
    root_password = os.getenv("ARANGO_ROOT_PASSWORD")
    arango = ArangoDB(user=root_user, password=root_password, db_name="_system")
    if arango.db.has_database(username):
        arango.db.delete_database(username)

    # Remove user access from documents in relevant collections
    collections = ["sci_articles", "other_documents"]
    for collection_name in collections:
        documents = base_arango.db.aql.execute(
            """
            FOR doc IN @@collection_name
                FILTER @username IN doc.user_access
                RETURN {'_id': doc._id, 'user_access': doc.user_access}
            """,
            bind_vars={"username": username, "@collection_name": collection_name},
        )
        for document in documents:
            if 'user_access' in document:
                # Remove username from the list user_access
                document['user_access'].remove(username)
                base_arango.db.collection(collection_name).update(document)

    print_green(f"User {username} deleted successfully.")


def main():
    parser = argparse.ArgumentParser(description="Add or delete a user.")
    parser.add_argument("--user", help="Username")
    parser.add_argument("--email", help="Email address")
    parser.add_argument("--name", help="Full name")
    parser.add_argument("--password", help="Password")
    parser.add_argument("--delete", action="store_true", help="Delete user")

    args = parser.parse_args()

    yaml_file = "streamlit_users.yaml"
    data = read_yaml(yaml_file)

    if args.delete:
        if args.user:
            username = args.user
            delete_user(data, username)
            write_yaml(yaml_file, data)
        else:
            print("Error: Username is required to delete a user.")
            sys.exit(1)
    else:
        if args.user and args.email and args.name:
            username = args.user
            email = args.email
            name = args.name
            if args.password and len(args.password) >= 8:
                password = args.password
            else:
                password = generate_random_password()
                print_yellow("Generated password:", password)
        else:
            username = input("Enter username: ")
            email = input("Enter email: ")
            name = input("Enter name: ")
            password = getpass.getpass("Enter password: ")
            if not password or password == "":
                password = generate_random_password()
                print_yellow("Generated password:", password)

        if username == 'test':
            delete_user(data, username)

        email = email.lower().strip()
        checked_username = fix_key(username)
        if checked_username != username:
            username = checked_username
            print_red(f"Username '{username}' contains invalid characters.")
            print_yellow(f"Using '{checked_username}' instead.")

        add_user(data, username, email, name, password)
        make_arango(username)
        write_yaml(yaml_file, data)
        print_green(f"User {username} added successfully.")


if __name__ == "__main__":
    main()