# coding=utf-8

import requests
from six import iteritems

import core
from core import logger


def auto_fork(section, input_category):
    # auto-detect correct section
    # config settings

    cfg = dict(core.CFG[section][input_category])

    host = cfg.get('host')
    port = cfg.get('port')
    username = cfg.get('username')
    password = cfg.get('password')
    apikey = cfg.get('apikey')
    ssl = int(cfg.get('ssl', 0))
    web_root = cfg.get('web_root', '')
    replace = {
        'medusa': 'Medusa',
        'sickbeard-api': 'SickBeard-api',
        'sickgear': 'SickGear',
        'sickchill': 'SickChill',
        'sickrage': 'SickRage',
        'stheno': 'Stheno',
    }
    _val = cfg.get('fork', 'auto')
    f1 = replace.get(_val, _val)
    try:
        fork = f1, core.FORKS[f1]
    except KeyError:
        fork = 'auto'
    protocol = 'https://' if ssl else 'http://'

    detected = False
    if section == 'NzbDrone':
        logger.info('Attempting to verify {category} fork'.format
                    (category=input_category))
        url = '{protocol}{host}:{port}{root}/api/rootfolder'.format(
                    protocol=protocol, host=host, port=port, root=web_root)
        headers = {'X-Api-Key': apikey}
        try:
            r = requests.get(url, headers=headers, stream=True, verify=False)
        except requests.ConnectionError:
            logger.warning('Could not connect to {0}:{1} to verify fork!'.format(section, input_category))

        if not r.ok:
            logger.warning('Connection to {section}:{category} failed! '
                           'Check your configuration'.format
                           (section=section, category=input_category))

        fork = ['default', {}]

    elif fork == 'auto':
        params = core.ALL_FORKS
        rem_params = []
        logger.info('Attempting to auto-detect {category} fork'.format(category=input_category))
        # define the order to test. Default must be first since the default fork doesn't reject parameters.
        # then in order of most unique parameters.

        if apikey:
            url = '{protocol}{host}:{port}{root}/api/{apikey}/?cmd=help&subject=postprocess'.format(
                        protocol=protocol, host=host, port=port, root=web_root, apikey=apikey)
        else:
            url = '{protocol}{host}:{port}{root}/home/postprocess/'.format(
                        protocol=protocol, host=host, port=port, root=web_root)

        # attempting to auto-detect fork
        try:
            s = requests.Session()
            if not apikey and username and password:
                login = '{protocol}{host}:{port}{root}/login'.format(
                    protocol=protocol, host=host, port=port, root=web_root)
                login_params = {'username': username, 'password': password}
                r = s.get(login, verify=False, timeout=(30, 60))
                if r.status_code == 401 and r.cookies.get('_xsrf'):
                    login_params['_xsrf'] = r.cookies.get('_xsrf')
                s.post(login, data=login_params, stream=True, verify=False)
            r = s.get(url, auth=(username, password), verify=False)
        except requests.ConnectionError:
            logger.info('Could not connect to {section}:{category} to perform auto-fork detection!'.format
                        (section=section, category=input_category))
            r = []
        if r and r.ok:
            if apikey:
                try:
                    json_data = r.json()
                except ValueError:
                    logger.error('Failed to get JSON data from response')
                    logger.debug('Response received')
                    raise

                try:
                    json_data = json_data['data']
                except KeyError:
                    logger.error('Failed to get data from JSON')
                    logger.debug('Response received: {}'.format(json_data))
                    raise
                else:
                    json_data = json_data.get('data', json_data)

                optional_parameters = json_data['optionalParameters'].keys()
                # Find excess parameters
                excess_parameters = set(params).difference(optional_parameters)
                logger.debug('Removing excess parameters: {}'.format(sorted(excess_parameters)))
                rem_params.extend(excess_parameters)
            else:
                # Find excess parameters
                rem_params.extend(
                    param
                    for param in params
                    if 'name="{param}"'.format(param=param) not in r.text
                )

            # Remove excess params
            for param in rem_params:
                params.pop(param)

            for fork in sorted(iteritems(core.FORKS), reverse=False):
                if params == fork[1]:
                    detected = True
                    break

        if detected:
            logger.info('{section}:{category} fork auto-detection successful ...'.format
                        (section=section, category=input_category))
        elif rem_params:
            logger.info('{section}:{category} fork auto-detection found custom params {params}'.format
                        (section=section, category=input_category, params=params))
            fork = ['custom', params]
        else:
            logger.info('{section}:{category} fork auto-detection failed'.format
                        (section=section, category=input_category))
            fork = core.FORKS.items()[core.FORKS.keys().index(core.FORK_DEFAULT)]

    logger.info('{section}:{category} fork set to {fork}'.format
                (section=section, category=input_category, fork=fork[0]))
    return fork[0], fork[1]