"""Member data utility functions.

Replaces memberdata.js:
  - realstatus: determine crew/passive/ex-crew/raumfahrer status
  - datum: parse 'YYYYMMDD' strings to German date format (d.m.YYYY)
  - datum_parsed: parse date strings via Python datetime
  - patenarray: split comma-separated sponsor names
  - cleanpaten: clean and rejoin sponsor names
"""

from datetime import datetime


def realstatus(member):
    """Determine the real membership status of *member*.

    member: dict with keys Kennung3, Austritt, Kurzname
    Returns one of: 'crew', 'raumfahrer', 'passiv', 'ex-crew', 'ex-raumfahrer'
    """
    if member is None:
        raise TypeError("Need a member record to work with")

    status = member.get('Kennung3') or ''

    # Normalize Kennung3 prefix
    if not status or status.startswith('check'):
        status = 'crew'
    if status.startswith('crew'):
        status = 'crew'
    if status.startswith('raumfahrer'):
        status = 'raumfahrer'
    if status.startswith('passiv'):
        status = 'passiv'

    # Check for expiry date (Austritt in the past)
    austritt = member.get('Austritt')
    if austritt and austritt != '':
        try:
            austritt_dt = datetime.strptime(austritt, '%Y-%m-%dT%H:%M:%S.%fZ')
            # Set to end of that day
            austritt_dt = austritt_dt.replace(hour=23, minute=59, second=59, microsecond=999999)
            if austritt_dt < datetime.utcnow():
                if status == 'crew' or status == 'passiv':
                    status = 'ex-crew'
                elif status == 'raumfahrer':
                    status = 'ex-raumfahrer'
        except ValueError:
            pass

    # Disabled crewname prefix
    kurzname = member.get('Kurzname') or ''
    if kurzname.startswith('disabled-'):
        status = 'ex-crew'

    return status


def datum(isodate):
    """Parse 'YYYYMMDD' string to German date format 'd.m.YYYY'.

    Returns '1.1.1970' on failure.
    """
    if not isinstance(isodate, str) or len(isodate) != 8:
        return '1.1.1970'
    try:
        dt = datetime.strptime(isodate, '%Y%m%d')
        return f'{dt.day}.{dt.month}.{dt.year}'
    except ValueError:
        return '1.1.1970'


def datum_parsed(isodate):
    """Parse a date string via Python datetime, return German format.

    Returns '1.1.1970' on failure.
    """
    try:
        dt = datetime.fromisoformat(isodate.replace('Z', '+00:00'))
        return f'{dt.day}.{dt.month}.{dt.year}'
    except (ValueError, AttributeError):
        return '1.1.1970'


def patenarray(patenstr):
    """Split a comma-separated sponsor string into a clean list.

    Handles leading/trailing whitespace and empty entries.
    """
    if not patenstr:
        return []
    if ',' not in patenstr:
        stripped = patenstr.strip()
        return [stripped] if stripped else []
    return [p.strip() for p in patenstr.split(',') if p.strip()]


def cleanpaten(patenstr):
    """Clean and rejoin sponsor names as a single comma-separated string."""
    return ','.join(patenarray(patenstr))