# dashboard/callbacks/appointments_callbacks.py
import dash
from dash import Input, Output, State, dcc
from flask import session
from utils.db import execute_query, execute_non_query

@dash.callback(
    Output("appointments-feedback", "children"),
    Input("btn-add-appointment", "n_clicks"),
    State("input-client-id", "value"),
    State("input-appointment-date", "date"),
    State("input-appointment-time", "value"),
    State("input-appointment-desc", "value"),
    prevent_initial_call=True
)
def add_appointment(n_clicks, client_id, date, time_str, desc):
    if "role" not in session:
        return dcc.Location(href="/login")
    if n_clicks and n_clicks > 0:
        datetime_str = f"{date} {time_str}:00"
        sql = """
            INSERT INTO appointments (client_id, start_datetime, description)
            VALUES (%s, %s, %s)
        """
        rc = execute_non_query(sql, (client_id, datetime_str, desc))
        return "Erstellt." if rc else "Fehler beim Anlegen."
    return ""