import base64
import json
from urllib.request import Request, urlopen

import logging
logger = logging.getLogger('django')

RECIPE_URL = 'https://api.brewfather.app/v2/recipes'
BATCH_URL = 'https://api.brewfather.app/v2/batches'
PULL_LIMIT = 50

BREWFATHER_CONVERT_LOOKUP = {  # local_name: brewfather_name
    'all': {
        'name': 'name',
        'unit_cost': 'costPerAmount',
        'supplier': 'supplier',
        'notes': 'notes',
        'user_notes': 'userNotes',
    },
    'fermentable': {
        'grain_category': 'grainCategory',
        'fermentable_type': 'type',
        'diastatic_power': 'diastaticPower',
        'potential': 'potential',
        'protein': 'protein',
        'attenuation': 'attenuation',
        'lovibond': 'lovibond',
        'max_in_batch': 'maxInBatch',
        'moisture': 'moisture',
        'non_fermentable': 'notFermentable',
        'ibu_per_unit': 'ibuPerAmount',
    },
    'hop': {
        'ibu': 'ibu',
        'use': 'use',
        'hop_type': 'type',
        'alpha': 'alpha',

    },
    'misc': {
        'use': 'use',
        'misc_type': 'type',
        'water_adjustment': 'waterAdjustment',

    }
}


def bf_from_local(category, name):
    return BREWFATHER_CONVERT_LOOKUP[category][name]


def local_from_bf(category, name):
    local_keys = list(BREWFATHER_CONVERT_LOOKUP[category].keys())
    bf_keys = list(BREWFATHER_CONVERT_LOOKUP[category].values())
    return local_keys[bf_keys.index(name)]


def get_batches(api_user, api_key, batch=''):
    auth_string = api_user + ':' + api_key

    auth64 = base64.b64encode(auth_string.encode("utf-8"))

    if batch != '':
        lastbatch = '&start_after=' + batch
    else:
        lastbatch = ''

    qry_str = ('{batch_url}?limit={pull_limit}'
               '&complete=True&include=recipe,recipe.batchSize'
               '&status=Planning{last_batch}')
    query = qry_str.format(
        batch_url=BATCH_URL,
        pull_limit=PULL_LIMIT,
        last_batch=lastbatch
    )

    req = Request(query)
    req.add_header('authorization', 'Basic ' + auth64.decode())
    content = urlopen(req)

    data = json.load(content)

    if len(data) == PULL_LIMIT:
        last_id = data[-1]['_id']
        data = data + get_batches(batch=last_id)

    return data