#!/usr/bin/env python3

from cerberus import Validator
from schwifty import IBAN, BIC
import datetime

def valid_iban(field, value, error):
    try:
        IBAN(value)
        return True
    except ValueError:
        error(field, 'not a valid IBAN')

def valid_bic(field, value, error):
    try:
        BIC(value)
        return True
    except ValueError:
        error(field, 'not a valid BIC')

def iso_date(field, value, error):
    try:
        datetime.datetime.strptime(value, "%Y-%m-%d")
        return True
    except ValueError:
        error(field, 'not a valid ISO 8601 date')

def valid_money_amount(field, value, error):
    try:
        float(value)
        return True
    except (ValueError, TypeError):
        error(field, 'not a valid money value')

document = {
            'finanzdaten': 
                {
                'bic': 'PBNKDEFFXXX', 
                'holder': '', 
                'iban': 'DE89370400440532013000', 
                'issuance': '2012-01-01', 
                'reference': '0042', 
                'scan-sepa-mandate': ''
                }, 
            'mitgliederdaten': 
                {
                'bis': '', 
                'mitgliedsbeitrag': '30', 
                'scan-antrag': '', 
                'schliessberechtigung': 'Ja', 
                'spendenbeitrag': '0', 
                'status': 'V', 
                'von': '2012-01-01'
                }, 
            'stammdaten': 
                {
                'address_code': '39104', 
                'address_country': 'DE', 
                'address_label': 'Max Hackerberg\nLeibnizstr. 32\n39104 Magdeburg', 
                'address_locality': 'Magdeburg', 
                'address_region': '', 
                'address_street': 'Leibnizstr. 32', 
                'birth_date': '1970-01-01', 
                'birth_location': 'Hackstadt', 
                'email': 'max.hackerberg@netz39.de', 
                'fullname': 'Max Hackerberg', 
                'nickname': 'maxH', 
                'pgp-key': '', 
                'ssh-key': ''
                }, 
            'timestamp': '2020-03-25T23:58:11', 
            'id': '6af68'
            }
            
schema_fin={
    'bic': {
        'type': 'string', 
        'required': True,
        'check_with': valid_bic},
    'iban': {
        'type': 'string', 
        'required': True,
        'check_with': valid_iban},
    'issuance': {
        'type': 'string', 
        'required': True,
        'check_with': iso_date},
    'reference': {'type': 'string'},
    'scan-sepa-mandate': {'type': 'string'},
    'holder': {'type': 'string'}}

schema_membership={
    'bis': {
        'type': 'string',
        'oneof': [{'check_with': iso_date},{'empty': True}]},
    'mitgliedsbeitrag': {
        'type': 'string', 
        'check_with': valid_money_amount},
    'scan-antrag': {'type': 'string'}, 
    'schliessberechtigung': {
        'type': 'string',
        'allowed': ['Ja', 'Nein', 'J', 'N', 'j', 'n', 'y', 'Y']}, 
    'spendenbeitrag': {
        'type': 'string',
        'check_with': valid_money_amount}, 
    'status': {
        'type': 'string',
        'allowed': ['V', 'E', 'F']}, 
    'von': {
        'type': 'string',
        'required': True,
        'check_with': iso_date}}

schema_base={
    'address_code': {
        'type': 'string'}, 
    'address_country': {
        'type': 'string'}, 
    'address_label': {
        'type': 'string'}, 
    'address_locality': {
        'type': 'string'}, 
    'address_region': {
        'type': 'string'}, 
    'address_street': {
        'type': 'string'},
    'birth_date': {
        'type': 'string',
        'required': True,
        'check_with': iso_date}, 
    'birth_location': {
        'type': 'string'},
    'email': {
        'type': 'string',
        'regex': '^[a-zA-Z0-9_.+-]+@[a-zA-Z0-9-]+\.[a-zA-Z0-9-.]+$'}, 
    'fullname': {
        'type': 'string'},
    'nickname': {
        'type': 'string'}, 
    'pgp-key': {
        'type': 'string'}, 
    'ssh-key': {
        'type': 'string'}}

schema = {
    'finanzdaten': {
        'type': 'dict', 
        'schema': schema_fin},
    'mitgliederdaten': {
        'type': 'dict', 
        'schema': schema_membership},
    'stammdaten': {
        'type': 'dict', 
        'schema': schema_base},
    'id': {
        'type': 'string',
        'regex': '^[a-f0-9]{5}$'},
    'timestamp': {
        'type': 'string'}
}

v = Validator()
print(v.validate(document, schema))
print(v.errors)