from flask import Blueprint, jsonify, request, current_app
from ..utils import get_db_connection

fuenf_minuten_bp = Blueprint('fuenf_minuten', __name__, url_prefix='/fuenf_minuten')

@fuenf_minuten_bp.route('/', strict_slashes=False)
def fuenf_minuten():
    # Abrufen der Filterparameter aus der Anfrage
    start_date = request.args.get('start_date')
    end_date = request.args.get('end_date')
    start_time = request.args.get('start_time', '00:00')
    end_time = request.args.get('end_time', '23:59')

    if not start_date or not end_date:
        return jsonify({'error': 'Bitte sowohl Start- als auch End-Datum auswählen.'})

    # Aufbau der Verbindung zur Datenbank
    conn = get_db_connection()
    cursor = conn.cursor()

    # SQL-Abfrage
    query = """
    WITH time_slots AS (
        SELECT DATE_FORMAT(create_time, '%Y-%m-%d %H:%i') AS time_slot, COUNT(*) AS transmission_count
        FROM gi_debugger_entry
        WHERE webservice_id = %s
          AND create_time BETWEEN %s AND %s
        GROUP BY time_slot
    ),
    all_times AS (
        SELECT DATE_FORMAT(TIMESTAMPADD(MINUTE, (@row := @row + 5), %s), '%Y-%m-%d %H:%i') AS time_slot
        FROM (SELECT @row := -5) AS vars
        CROSS JOIN (
            SELECT 1 AS dummy
            FROM gi_debugger_entry
            LIMIT 100000
        ) AS generator
        WHERE TIMESTAMPADD(MINUTE, @row, %s) <= %s
    )
    SELECT all_times.time_slot, COALESCE(time_slots.transmission_count, 0) AS transmission_count
    FROM all_times
    LEFT JOIN time_slots ON all_times.time_slot = time_slots.time_slot
    ORDER BY all_times.time_slot;
    """
    start_datetime = f"{start_date} {start_time}"
    end_datetime = f"{end_date} {end_time}"

    # Debugging: Ausgabe der Parameter
    print(f"Start datetime: {start_datetime}")
    print(f"End datetime: {end_datetime}")
    print(f"Executing query for WEB_SERVICE_ID: {current_app.config['WEB_SERVICE_ID']}")

    try:
        # Ausführen der SQL-Abfrage
        cursor.execute(query, (
            current_app.config['WEB_SERVICE_ID'],
            start_datetime,
            end_datetime,
            start_datetime,
            start_datetime,
            end_datetime
        ))
        results = cursor.fetchall()

        # Debugging: Ausgabe der Ergebnisse
        print("SQL query executed successfully.")
        print("Results:", results)

        conn.close()

        # Formatierung der Ergebnisse für die API-Antwort
        return jsonify([{'time_slot': row[0], 'transmission_count': row[1]} for row in results])

    except Exception as e:
        # Fehlerbehandlung und Debugging
        conn.close()
        print("Error during SQL execution:", str(e))
        return jsonify({'error': str(e)})