from flask import Blueprint, request, jsonify
from datetime import datetime, timezone
from util.logger import logger
from auth.token import verify_token

timestamp_blueprint = Blueprint('timestamp_tool', __name__)

_DATE_FORMATS = [
    "%Y-%m-%dT%H:%M:%S",
    "%Y-%m-%d %H:%M:%S",
    "%Y-%m-%d",
    "%d.%m.%Y %H:%M:%S",
    "%d.%m.%Y",
]


@timestamp_blueprint.route('/api/timestamp/convert', methods=['POST'])
def convert_timestamp():
    user = verify_token()
    if not user:
        return jsonify({"message": "Nicht autorisiert"}), 401
    try:
        data = request.get_json()
        value = data.get("value", "").strip()
        direction = data.get("direction", "unix_to_date")

        if direction == "unix_to_date":
            ts = float(value)
            dt_utc = datetime.fromtimestamp(ts, tz=timezone.utc)
            return jsonify({"utc": dt_utc.isoformat(), "unix": int(ts)})

        dt = None
        for fmt in _DATE_FORMATS:
            try:
                dt = datetime.strptime(value, fmt).replace(tzinfo=timezone.utc)
                break
            except ValueError:
                continue
        if dt is None:
            return jsonify({"message": "Ungültiges Datumsformat"}), 400

        logger.info(f"Timestamp konvertiert von {user['username']}")
        return jsonify({"unix": int(dt.timestamp()), "utc": dt.isoformat()})
    except Exception as e:
        logger.error(f"Fehler Timestamp: {e}")
        return jsonify({"message": "Ungültiger Wert"}), 400