from datetime import datetime
from typing import Union

import firebase_admin
import jwt
from firebase_admin import auth, credentials, firestore
from google.api_core.exceptions import Aborted, DataLoss, NotFound, OutOfRange, PermissionDenied, ResourceExhausted

import file_manager

cred = credentials.Certificate('secrets/servii.json')
app = firebase_admin.initialize_app(cred)
firestore_database = firestore.client()

'''
TODO
Write a function that launches upon app's startup, it does check in the firestore for any already running servers.
Fetches the PID's.
Stops all the current processes,
Tell the database they have now stopped running.
Also ensure the program can add an additional argument to avoid this checking for scalability.
'''


def get_user_from_id(user_id):
    return auth.get_user(user_id)


def verify_jwt_token(token):
    try:
        decoded_token = jwt.decode(token, options={"verify_signature": False})
        user_id = decoded_token.get('sub')
        return True, user_id
    except jwt.ExpiredSignatureError:
        return False, None
    except jwt.InvalidTokenError:
        return False, None


def fetch_port() -> Union[int, None]:
    servers_ref = firestore_database.collection("users")
    query = servers_ref.order_by("port", direction="DESCENDING").limit(1)
    highest_port_doc = next(query.stream(), None)
    if highest_port_doc:
        return highest_port_doc.get('port')
    return None


def user_field_exists(user_id: str) -> bool:
    try:
        doc = firestore_database.collection('users').document(user_id).get()
        if doc.exists:
            return True
        return False
    except NotFound:
        return False


def server_name_taken(user_id: str, server_name: str) -> bool:
    servers = firestore_database.collection('users').document(user_id).collection('servers')
    query = servers.where(field_path='name', op_string='==', value=server_name)
    for _ in query.stream():
        return True
    return False


def get_user_field(user_id, field_name):
    user_doc_ref = firestore_database.collection('users').document(user_id)
    user_doc = user_doc_ref.get()
    if user_doc.exists:
        field_value = user_doc.to_dict().get(field_name)
        return field_value
    else:
        return None


def get_server_port(user_id: str) -> Union[int, None]:
    try:
        servers_ref = firestore_database.collection('users').document(user_id)
        server_doc = servers_ref.get()
        port = server_doc.get('port')
        return port if port else None
    except Exception as e:
        file_manager.log_error(type(e).__name__, str(e))
        return None


def create_firestore(user_id: str, data: dict) -> bool:
    doc_ref = firestore_database.collection('users').document(user_id)
    try:
        doc_ref.create(data)
        return True
    except (NotFound, PermissionDenied, Aborted, ResourceExhausted,
            OutOfRange, DataLoss, TypeError, Exception, ValueError) as e:
        log_exception_to_firestore(e, user_id, data)
        return False


def update_firestore(user_id: str, data: dict) -> bool:
    doc_ref = firestore_database.collection('users').document(user_id)
    try:
        doc_ref.update(data)
        return True
    except (NotFound, PermissionDenied, Aborted, ResourceExhausted,
            OutOfRange, DataLoss, TypeError, Exception, ValueError) as e:
        log_exception_to_firestore(e, user_id, data)
        return False


def set_firestore(user_id: str, data: dict) -> bool:
    doc_ref = firestore_database.collection('users').document(user_id)
    try:
        doc_ref.set(data)
        return True
    except (NotFound, PermissionDenied, Aborted, ResourceExhausted,
            OutOfRange, DataLoss, TypeError, Exception, ValueError) as e:
        log_exception_to_firestore(e, user_id, data)
        return False


def create_server(user_id: str, server_name: str, version: str, port: str, framework: str = "paper"):
    port: int = int(port)
    servers_ref = firestore_database.collection('users').document(user_id).collection('servers')
    server_doc_ref = servers_ref.document(server_name)
    server_doc_ref.set(
        {'name': server_name,
         'port': port,
         'running': False,
         'version': version,
         'framework': framework,
         "difficulty": "easy",
         "gamemode": "survival",
         "forceGamemode": "false",
         "hardcore": "false",
         "generateStructures": "true",
         "motd": "A Minecraft Server",
         "pvp": "true",
         "onlineMode": "true",
         "maxPlayers": 20,
         "enableCommandBlock": "false"})


def delete_server(user_id: str, server_name: str):
    user_ref = firestore_database.collection('users').document(user_id)
    servers_ref = user_ref.collection('servers')
    server_doc_ref = servers_ref.document(server_name)
    server_doc_ref.delete()


def delete_user(user_id: str):
    user_ref = firestore_database.collection('users').document(user_id)
    user_ref.delete()


def update_server_running_state(user_id: str, server_name: str, state: bool):
    server_ref = firestore_database.collection('users').document(user_id).collection('servers').document(server_name)
    if server_ref.get().get('running') != state:
        server_ref.update({'running': state})


def update_server_property(user_id: str, server_name: str, prop: str, value: str):
    server_ref = firestore_database.collection('users').document(user_id).collection('servers').document(server_name)
    prop = file_manager.kebab_to_camel_case(prop)
    server_ref.update({prop: value})


def log_exception_to_firestore(exception: Exception = None, user_id: str = None, data: dict = None):
    new_id: str = datetime.now().strftime('%Y-%m-%d %H:%M:%S %Z%z')
    log_entry = {
        'exception_name': str(type(exception).__name__),
        'exception': str(exception) if exception else 'No exception',
        'user_id': str(user_id) if user_id else 'No user_id',
        'data': str(data) if data else 'No data provided',
    }
    try:
        firestore_database.collection('firebase.logs').document(new_id).create(log_entry)
        print("Log entry added successfully.")
    except Exception as e:
        print(f"Failed to add log entry: {e}")


if __name__ == "__main__":
    pass