"""Check/create supply_contract for supplier_id, then show CRUD page."""
supplier_id = params_kw.get('supplier_id')
if not supplier_id:
    return {'widgettype': 'Error', 'options': {'title': 'Error', 'message': 'Missing supplier_id', 'timeout': 3}}

userorgid = await get_userorgid()
if not userorgid:
    return {'widgettype': 'Error', 'options': {'title': 'Auth Error', 'message': 'Please login', 'timeout': 3}}

dbname = get_module_dbname('supplychain')
async with DBPools().sqlorContext(dbname) as sor:
    recs = await sor.sqlExe(
        'SELECT id FROM supply_contracts WHERE supplier_id = ${sid}$ AND resellerid = ${rid}$ AND status = ${st}$',
        {'sid': supplier_id, 'rid': userorgid, 'st': '1'}
    )
    if not recs:
        sub = await sor.sqlExe(
            'SELECT supplier_name FROM suppliers WHERE id = ${sid}$',
            {'sid': supplier_id}
        )
        sup_name = sub[0].supplier_name if sub else supplier_id
        prefix = f"SC-{datetime.datetime.now().strftime('%Y%m%d')}"
        cnt_recs = await sor.sqlExe(
            'SELECT COUNT(*) as cnt FROM supply_contracts WHERE resellerid = ${rid}$ AND contract_code LIKE ${p}$',
            {'rid': userorgid, 'p': prefix + '%'}
        )
        seq = (cnt_recs[0].cnt if cnt_recs else 0) + 1
        now = timestampstr()
        await sor.C('supply_contracts', {
            'id': getID(),
            'resellerid': userorgid,
            'supplier_id': supplier_id,
            'contract_code': f"{prefix}-{seq:04d}",
            'contract_name': f'{sup_name}供销协议',
            'start_date': curDateString(),
            'status': '1',
            'default_discount': '1.0000',
            'created_by': userorgid,
            'created_at': now,
            'updated_at': now,
        })

return {
    'widgettype': 'DataViewer',
    'options': {
        'url': f'../supply_contracts_list?supplier_id={supplier_id}&_webbricks_=1'
    }
}