import json
import logging
import sys

from passivetotal.common.utilities import is_ip


log = logging.getLogger('passivetotal')
log.setLevel(logging.DEBUG)
ch = logging.StreamHandler(sys.stdout)
ch.setLevel(logging.DEBUG)
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')
ch.setFormatter(formatter)
log.addHandler(ch)

misperrors = {'error': 'Error'}
mispattributes = {
    'input': ['hostname', 'domain', 'ip-src', 'ip-dst',
              'x509-fingerprint-sha1', 'email-src', 'email-dst',
              'target-email', 'whois-registrant-email',
              'whois-registrant-phone', 'text', 'whois-registrant-name',
              'whois-registrar', 'whois-creation-date'],
    'output': ['hostname', 'domain', 'ip-src', 'ip-dst',
               'x509-fingerprint-sha1', 'email-src', 'email-dst',
               'target-email', 'whois-registrant-email',
               'whois-registrant-phone', 'text', 'whois-registrant-name',
               'whois-registrar', 'whois-creation-date', 'md5', 'sha1',
               'sha256', 'link']
}
moduleinfo = {
    'version': '1.0',
    'author': 'Brandon Dixon',
    'description': 'The PassiveTotal MISP expansion module brings the datasets derived from Internet scanning directly into your MISP instance. This module supports passive DNS, historic SSL, WHOIS, and host attributes. In order to use the module, you must have a valid PassiveTotal account username and API key. Registration is free and can be done by visiting https://www.passivetotal.org/register',
    'module-type': ['expansion', 'hover']
}
moduleconfig = ['username', 'api_key']
query_playbook = [
    {'inputs': ['ip-src', 'ip-dst', 'hostname', 'domain'],
     'services': ['whois', 'ssl', 'dns', 'enrichment'],
     'name': 'generic'},
    {'inputs': ['whois-registrant-email', 'whois-registrant-phone',
                'whois-registrant-name', 'email-src', 'email-dst',
                'target-email'],
     'services': ['whois'],
     'name': 'reverse-whois'},
    {'inputs': ['x509-fingerprint-sha1'],
     'services': ['ssl'],
     'name': 'ssl-history'},
]


def query_finder(request):
    """Find the query value in the client request."""
    for item in mispattributes['input']:
        if not request.get(item, None):
            continue

        playbook = None
        for x in query_playbook:
            if item not in x['inputs']:
                continue
            playbook = x
            break

        return {'type': item, 'value': request.get(item), 'playbook': playbook}


def build_profile(request):
    """Check the incoming request for a valid configuration."""
    output = {'success': False}
    config = request.get('config', None)
    if not config:
        misperrors['error'] = "Configuration is missing from the request."
        return output

    for item in moduleconfig:
        if config.get(item, None):
            continue
        misperrors['error'] = "PassiveTotal authentication is missing."
        return output

    profile = {'success': True, 'config': config}
    profile.update(query_finder(request))

    return profile


def _generate_request_instance(conf, request_type):
    """Automatically generate a request instance to use.

    In the end, this saves us from having to load each request class in a
    explicit way. Loading via a string is helpful to reduce the code per
    call.

    :param request_type: Type of client to load
    :return: Loaded PassiveTotal client
    """
    pt_username = conf.get('username')
    pt_api_key = conf.get('api_key')

    class_lookup = {'dns': 'DnsRequest', 'whois': 'WhoisRequest',
                    'ssl': 'SslRequest', 'enrichment': 'EnrichmentRequest',
                    'attributes': 'AttributeRequest'}
    class_name = class_lookup[request_type]
    mod = __import__('passivetotal.libs.%s' % request_type,
                     fromlist=[class_name])
    loaded = getattr(mod, class_name)
    headers = {'PT-INTEGRATION': 'MISP'}
    authenticated = loaded(pt_username, pt_api_key, headers=headers)
    return authenticated


def _has_error(results):
    """Check to see if there's an error in place and log it."""
    if 'error' in results:
        msg = "%s - %s" % (results['error']['message'],
                           results['error']['developer_message'])
        misperrors['error'] = msg
        return True

    return False


def process_ssl_details(instance, query):
    """Process details for a specific certificate."""
    log.debug("SSL Details: starting")
    values = list()
    _ = instance.get_ssl_certificate_details(query=query)
    err = _has_error(_)
    if err:
        raise Exception("We hit an error, time to bail!")

    for key, value in _.items():
        if not value:
            continue
        values.append(value)
    txt = [{'types': ['ssl-cert-attributes'], 'values': list(set(values))}]
    log.debug("SSL Details: ending")

    return txt


def process_ssl_history(instance, query):
    """Process the history for an SSL certificate."""
    log.debug("SSL History: starting")

    type_map = {
        'ip': ['ip-src', 'ip-dst'],
        'domain': ['domain', 'hostname'],
        'sha1': ['x509-fingerprint-sha1']
    }

    hits = {'ip': list(), 'sha1': list(), 'domain': list()}
    _ = instance.get_ssl_certificate_history(query=query)
    err = _has_error(_)
    if err:
        raise Exception("We hit an error, time to bail!")

    for item in _.get('results', []):
        hits['ip'] += item.get('ipAddresses', [])
        hits['sha1'].append(item['sha1'])
        hits['domain'] += item.get('domains', [])

    tmp = list()
    for key, value in hits.items():
        txt = {'types': type_map[key], 'values': list(set(value))}
        tmp.append(txt)

    log.debug("SSL Details: ending")

    return tmp


def process_whois_details(instance, query):
    """Process the detail from the WHOIS record."""
    log.debug("WHOIS Details: starting")
    tmp = list()
    _ = instance.get_whois_details(query=query, compact_record=True)
    err = _has_error(_)
    if err:
        raise Exception("We hit an error, time to bail!")

    if _.get('contactEmail', None):
        tmp.append({'types': ['whois-registrant-email'], 'values': [_.get('contactEmail')]})
    phones = _['compact']['telephone']['raw']
    tmp.append({'types': ['whois-registrant-phone'], 'values': phones})
    names = _['compact']['name']['raw']
    tmp.append({'types': ['whois-registrant-name'], 'values': names})
    if _.get('registrar', None):
        tmp.append({'types': ['whois-registrar'], 'values': [_.get('registrar')]})
    if _.get('registered', None):
        tmp.append({'types': ['whois-creation-date'], 'values': [_.get('registered')]})
    log.debug("WHOIS Details: ending")

    return tmp


def process_whois_search(instance, query, qtype):
    """Process a WHOIS search for a specific field value."""
    log.debug("WHOIS Search: starting")
    if qtype in ['whois-registrant-email', 'email-src', 'email-dst', 'target-email']:
        field_type = 'email'
    if qtype in ['whois-registrant-phone']:
        field_type = 'phone'
    if qtype in ['whois-registrant-name']:
        field_type = 'name'

    domains = list()
    _ = instance.search_whois_by_field(field=field_type, query=query)
    err = _has_error(_)
    if err:
        raise Exception("We hit an error, time to bail!")

    for item in _.get('results', []):
        domain = item.get('domain', None)
        if not domain:
            continue
        domains.append(domain)

    tmp = [{'types': ['hostname', 'domain'], 'values': list(set(domains))}]
    log.debug("WHOIS Search: ending")

    return tmp


def process_passive_dns(instance, query):
    """Process passive DNS data."""
    log.debug("Passive DNS: starting")
    tmp = list()
    _ = instance.get_unique_resolutions(query=query)
    err = _has_error(_)
    if err:
        raise Exception("We hit an error, time to bail!")

    if is_ip(query):
        tmp = [{'types': ['domain', 'hostname'], 'values': _.get('results', [])}]
    else:
        tmp = [{'types': ['ip-src', 'ip-dst'], 'values': _.get('results', [])}]
    log.debug("Passive DNS: ending")

    return tmp


def process_osint(instance, query):
    """Process OSINT links."""
    log.debug("OSINT: starting")
    urls = list()
    _ = instance.get_osint(query=query)
    err = _has_error(_)
    if err:
        raise Exception("We hit an error, time to bail!")

    for item in _.get('results', []):
        urls.append(item['sourceUrl'])

    tmp = [{'types': ['link'], 'values': urls}]
    log.debug("OSINT: ending")

    return tmp


def process_malware(instance, query):
    """Process malware samples."""
    log.debug("Malware: starting")
    content = {'hashes': list(), 'urls': list()}
    _ = instance.get_malware(query=query)
    err = _has_error(_)
    if err:
        raise Exception("We hit an error, time to bail!")

    for item in _.get('results', []):
        content['hashes'].append(item['sample'])
        content['urls'].append(item['sourceUrl'])

    tmp = [{'types': ['link'], 'values': content['urls']}]
    hashes = {'md5': list(), 'sha1': list(), 'sha256': list()}
    for h in content['hashes']:
        if len(h) == 32:
            hashes['md5'].append(h)
        elif len(h) == 41:
            hashes['sha1'].append(h)
        elif len(h) == 64:
            hashes['sha256'].append(h)
    tmp += [{'types': ['md5'], 'values': hashes['md5']}]
    tmp += [{'types': ['sha1'], 'values': hashes['sha1']}]
    tmp += [{'types': ['sha256'], 'values': hashes['sha256']}]
    log.debug("Malware: ending")

    return tmp


def handler(q=False):
    if not q:
        return q

    request = json.loads(q)
    profile = build_profile(request)
    if not profile['success']:
        log.error(misperrors['error'])
        return misperrors

    output = {'results': list()}

    instances = dict()
    for service in profile['playbook']['services']:
        instances[service] = _generate_request_instance(
            profile['config'], service)

    play_type = profile['playbook']['name']
    query = profile['value']
    qtype = profile['type']
    try:
        if play_type == 'generic':
            results = process_passive_dns(instances['dns'], query)
            output['results'] += results
            results = process_whois_details(instances['whois'], query)
            output['results'] += results
            results = process_ssl_history(instances['ssl'], query)
            output['results'] += results
            results = process_osint(instances['enrichment'], query)
            output['results'] += results
            results = process_malware(instances['enrichment'], query)
            output['results'] += results
        elif play_type == 'reverse-whois':
            results = process_whois_search(instances['whois'], query, qtype)
            output['results'] += results
        elif play_type == 'ssl-history':
            results = process_ssl_details(instances['ssl'], query)
            output['results'] += results
            results = process_ssl_history(instances['ssl'], query)
            output['results'] += results
        else:
            log.error("Unsupported query pattern issued.")
    except Exception:
        return misperrors

    return output


def introspection():
    return mispattributes


def version():
    moduleinfo['config'] = moduleconfig
    return moduleinfo