from datetime import datetime, timedelta
from hashlib import sha1, sha256, md5
from hmac import new as hmac
from types import MethodType
import re

import requests
from domaintools.results import GroupedIterable, ParsedWhois, Reputation, Results

AVAILABLE_KEY_SIGN_HASHES = ['sha1', 'sha256', 'md5']


def delimited(items, character='|'):
    """Returns a character delimited version of the provided list as a Python string"""
    return character.join(items) if type(items) in (list, tuple, set) else items


class API(object):
    """Enables interacting with the DomainTools' API via Python:

           from domaintools import API

           api = API('my_name', 'my_key')
           results = api.domain_search('domain')

        By default the API will automatically space out your requests to match your rate limits.
        If your running over multiple Python runtimes, have your own rate limiting approach, or are doing a one-off
        query (such as for a CLI command) you can set rate_limit=False to turn this feature off.

        If you encounter SSL errors you can pass in verify_ssl=False to avoid verification of the SSL cert.
        To use the API without SSL in it's entirety pass in https=False.

       For detailed usage information of all API calls see: https://www.domaintools.com/resources/api-documentation/
    """
    limits = {}
    limits_set = False

    def __init__(self, username, key, https=True, verify_ssl=True, rate_limit=True, proxy_url=None,
                 always_sign_api_key=False, key_sign_hash='sha256', **default_parameters):
        self.username = username
        self.key = key
        self.default_parameters = default_parameters
        self.https = https
        self.verify_ssl = verify_ssl
        self.rate_limit = rate_limit
        self.proxy_url = proxy_url
        self.extra_request_params = {}
        self.extra_aiohttp_params = {}
        self.always_sign_api_key = always_sign_api_key
        self.key_sign_hash = key_sign_hash
        if not https:
            raise Exception("The DomainTools API endpoints no longer support http traffic. Please make sure https=True.")
        if proxy_url:
            if isinstance(proxy_url, str):
                self.extra_request_params['proxies'] = {'http': proxy_url, 'https': proxy_url}
                self.extra_aiohttp_params['proxy'] = proxy_url
            else:
                raise Exception("Proxy URL must be a string. For example: '127.0.0.1:8888'")

    def _rate_limit(self):
        """Pulls in and enforces the latest rate limits for the specified user"""
        self.limits_set = True
        for product in self.account_information():
            self.limits[product['id']] = {'interval': timedelta(seconds=60 / float(product['per_minute_limit']))}

    def _results(self, product, path, cls=Results, **kwargs):
        """Returns _results for the specified API path with the specified **kwargs parameters"""
        if product != 'account-information' and self.rate_limit and not self.limits_set and not self.limits:
            self._rate_limit()

        uri = '/'.join(('https://api.domaintools.com', path.lstrip('/')))
        parameters = self.default_parameters.copy()
        parameters['api_username'] = self.username
        self.handle_api_key(path, parameters)
        parameters.update(
            {
                key: str(value).lower() if value in (True, False) else value
                for key, value in kwargs.items()
                if value is not None
            }
        )

        return cls(self, product, uri, **parameters)

    def handle_api_key(self, path, parameters):
        if self.https and not self.always_sign_api_key:
            parameters['api_key'] = self.key
        else:
            if self.key_sign_hash and self.key_sign_hash in AVAILABLE_KEY_SIGN_HASHES:
                signing_hash = eval(self.key_sign_hash)
            else:
                raise ValueError("Invalid value '{0}' for 'key_sign_hash'. "
                                 "Values available are {1}".format(self.key_sign_hash, ','.join(AVAILABLE_KEY_SIGN_HASHES)))
            parameters['timestamp'] = datetime.utcnow().strftime('%Y-%m-%dT%H:%M:%SZ')
            parameters['signature'] = hmac(self.key.encode('utf8'),
                                           ''.join([self.username, parameters['timestamp'], path]).encode('utf8'),
                                           digestmod=signing_hash).hexdigest()


    def account_information(self, **kwargs):
        """Provides a snapshot of your accounts current API usage"""
        return self._results('account-information', '/v1/account', items_path=('products',), **kwargs)

    def available_api_calls(self):
        """Provides a list of api calls that you can use based on your account information."""

        def snakecase(string):
            string = re.sub(r"[\-\.\s]", '_', str(string))
            if not string:
                return string
            return str(string[0]).lower() + re.sub(r"[A-Z]", lambda matched: '_' + str(matched.group(0)).lower(),
                                                   string[1:])

        api_calls = tuple((api_call for api_call in dir(API) if not api_call.startswith('_') and
                           callable(getattr(API, api_call, None))))
        return sorted([snakecase(p["id"]) for p in self.account_information()["products"] if snakecase(p["id"]) in api_calls])

    def brand_monitor(self, query, exclude=None, domain_status=None, days_back=None, **kwargs):
        """Pass in one or more terms as a list or separated by the pipe character ( | )"""
        if exclude is None:
            exclude = []
        return self._results('mark-alert', '/v1/mark-alert', query=delimited(query), exclude=delimited(exclude),
                             domain_status=domain_status, days_back=days_back, items_path=('alerts',), **kwargs)

    def domain_profile(self, query, **kwargs):
        """Returns a profile for the specified domain name"""
        return self._results('domain-profile', '/v1/{0}'.format(query))

    def domain_search(self, query, exclude_query=None, max_length=25, min_length=2, has_hyphen=True, has_number=True,
                      active_only=False, deleted_only=False, anchor_left=False, anchor_right=False, page=1, **kwargs):
        """Each term in the query string must be at least three characters long.
           Pass in a list or use spaces to separate multiple terms.
        """
        if exclude_query is None:
            exclude_query = []
        return self._results('domain-search', '/v2/domain-search', query=delimited(query, ' '),
                             exclude_query=delimited(exclude_query, ' '),
                             max_length=max_length, min_length=min_length, has_hyphen=has_hyphen, has_number=has_number,
                             active_only=active_only, deleted_only=deleted_only, anchor_left=anchor_left,
                             anchor_right=anchor_right, page=page, items_path=('results',), **kwargs)

    def hosting_history(self, query, **kwargs):
        """Returns the hosting history from the given domain name"""
        return self._results('hosting-history', '/v1/{0}/hosting-history'.format(query), cls=GroupedIterable, **kwargs)

    def ip_monitor(self, query, days_back=0, page=1, **kwargs):
        """Pass in the IP Address you wish to query ( i.e. 199.30.228.112 )."""
        return self._results('ip-monitor', '/v1/ip-monitor', query=query, days_back=days_back, page=page,
                             items_path=('alerts',), **kwargs)

    def ip_registrant_monitor(self, query, days_back=0, search_type="all", server=None, country=None, org=None, page=1,
                              include_total_count=False, **kwargs):
        """Query based on free text query terms"""
        return self._results('ip-registrant-monitor', '/v1/ip-registrant-monitor', query=query,
                             days_back=days_back, search_type=search_type, server=server, country=country, org=org,
                             page=page, include_total_count=include_total_count, **kwargs)

    def name_server_monitor(self, query, days_back=0, page=1, **kwargs):
        """Pass in the hostname of the Name Server you wish to query ( i.e. dynect.net )."""
        return self._results('name-server-monitor', '/v1/name-server-monitor', query=query, days_back=days_back,
                             page=page, items_path=('alerts',), **kwargs)

    def parsed_whois(self, query, **kwargs):
        """Pass in a domain name"""
        return self._results('parsed-whois', '/v1/{0}/whois/parsed'.format(query), cls=ParsedWhois, **kwargs)

    def registrant_monitor(self, query, exclude=None, days_back=0, limit=None, **kwargs):
        """One or more terms as a Python list or separated by the pipe character ( | )."""
        if exclude is None:
            exclude = []
        return self._results('registrant-alert', '/v1/registrant-alert', query=delimited(query),
                             exclude=delimited(exclude), days_back=days_back, limit=limit, items_path=('alerts',),
                             **kwargs)

    def reputation(self, query, include_reasons=False, **kwargs):
        """Pass in a domain name to see its reputation score"""
        return self._results('reputation', '/v1/reputation', domain=query, include_reasons=include_reasons,
                             cls=Reputation, **kwargs)

    def reverse_ip(self, domain=None, limit=None, **kwargs):
        """Pass in a domain name."""
        return self._results('reverse-ip', '/v1/{0}/reverse-ip'.format(domain), limit=limit, **kwargs)

    def host_domains(self, ip=None, limit=None, **kwargs):
        """Pass in an IP address."""
        return self._results('reverse-ip', '/v1/{0}/host-domains'.format(ip), limit=limit, **kwargs)

    def reverse_ip_whois(self, query=None, ip=None, country=None, server=None, include_total_count=False, page=1,
                         **kwargs):
        """Pass in an IP address or a list of free text query terms."""
        if (ip and query) or not (ip or query):
            raise ValueError('Query or IP Address (but not both) must be defined')

        return self._results('reverse-ip-whois', '/v1/reverse-ip-whois', query=query, ip=ip, country=country,
                             server=server, include_total_count=include_total_count, page=page, items_path=('records',),
                             **kwargs)

    def reverse_name_server(self, query, limit=None, **kwargs):
        """Pass in a domain name or a name server."""
        return self._results('reverse-name-server', '/v1/{0}/name-server-domains'.format(query),
                             items_path=('primary_domains',), limit=limit, **kwargs)

    def reverse_whois(self, query, exclude=None, scope='current', mode='purchase', **kwargs):
        """List of one or more terms to search for in the Whois record,
           as a Python list or separated with the pipe character ( | ).
        """
        if exclude is None:
            exclude = []
        return self._results('reverse-whois', '/v1/reverse-whois', terms=delimited(query), exclude=delimited(exclude),
                             scope=scope, mode=mode, **kwargs)

    def whois(self, query, **kwargs):
        """Pass in a domain name or an IP address to perform a whois lookup."""
        return self._results('whois', '/v1/{0}/whois'.format(query), **kwargs)

    def whois_history(self, query, mode=None, sort=None, offset=None, limit=None, **kwargs):
        """Pass in a domain name."""
        return self._results('whois-history', '/v1/{0}/whois/history'.format(query), mode=mode, sort=sort,
                             offset=offset, limit=limit, items_path=('history',), **kwargs)

    def phisheye(self, query, days_back=None, **kwargs):
        """Returns domain results for the specified term for today or the specified number of days_back.
           Terms must be setup for monitoring via the web interface: https://research.domaintools.com/phisheye.

           NOTE: Properties of a domain are only provided if we have been able to obtain them.
                 Many domains will have incomplete data because that information isn't available in their Whois records,
                 or they don't have DNS results for a name server or IP address.
        """
        return self._results('phisheye', '/v1/phisheye', query=query, days_back=days_back, items_path=('domains',),
                             **kwargs)

    def phisheye_term_list(self, include_inactive=False, **kwargs):
        """Provides a list of terms that are set up for this account.
           This call is not charged against your API usage limit.

           NOTE: The terms must be configured in the PhishEye web interface: https://research.domaintools.com/phisheye.
                 There is no API call to set up the terms.
        """
        return self._results('phisheye_term_list', '/v1/phisheye/term-list', include_inactive=include_inactive,
                             items_path=('terms',), **kwargs)

    def iris(self, domain=None, ip=None, email=None, nameserver=None, registrar=None, registrant=None,
             registrant_org=None, **kwargs):
        """Performs a search for the provided search terms ANDed together,
           returning the pivot engine row data for the resulting domains.
        """
        if ((not domain and not ip and not email and not nameserver and not registrar and not registrant and not
             registrant_org and not kwargs)):
            raise ValueError('At least one search term must be specified')

        return self._results('iris', '/v1/iris', domain=domain, ip=ip, email=email, nameserver=nameserver,
                             registrar=registrar, registrant=registrant, registrant_org=registrant_org,
                             items_path=('results',), **kwargs)

    def risk(self, domain, **kwargs):
        """Returns back the risk score for a given domain"""
        return self._results('risk', '/v1/risk', items_path=('components',), domain=domain, cls=Reputation,
                             **kwargs)

    def risk_evidence(self, domain, **kwargs):
        """Returns back the detailed risk evidence associated with a given domain"""
        return self._results('risk-evidence', '/v1/risk/evidence/', items_path=('components',), domain=domain,
                             **kwargs)

    def iris_enrich(self, *domains, **kwargs):
        """Returns back enriched data related to the specified domains using our Iris Enrich service
           each domain should be passed in as an un-named argument to the method:
               iris_enrich('domaintools.com', 'google.com')

           api.iris_enrich(*DOMAIN_LIST)['results_count'] Returns the number of results
           api.iris_enrich(*DOMAIN_LIST)['missing_domains'] Returns any domains that we were unable to
                                                           retrieve enrichment data for
           api.iris_enrich(*DOMAIN_LIST)['limit_exceeded'] Returns True if you've exceeded your API usage

           for enrichment in api.iris_enrich(*DOMAIN_LIST):  # Enables looping over all returned enriched domains

           for example:
               enrich_domains = ['google.com', 'amazon.com']
               assert api.iris_enrich(*enrich_domains)['missing_domains'] == []
        """
        if not domains: