__author__ = "Dennis Potter"
__copyright__ = "Copyright 2019, Dennis Potter"
__credits__ = ["Dennis Potter"]
__license__ = "GPL-3.0"
__version__ = "0.5.0"
__maintainer__ = "Dennis Potter"
__email__ = "dennis@dennispotter.eu"

from matrix_bot_api.mregex_handler import MRegexHandler
from woocommerce import API
from base64 import b64encode
import os
import hjson
import datetime as dt

MESSAGE_DIR = os.path.join(os.path.dirname(__file__), 'messages')
DATA_DIR = os.path.join(os.path.dirname(__file__),'../../data/woocommerce')
CONFIG_LOCATION = os.path.join(os.path.dirname(__file__), 'config.hjson')

DATA_LOCATION = DATA_DIR + '/id.hjson'
HELP_LOCATION = MESSAGE_DIR + '/help'
MESSAGES_LOCATION = MESSAGE_DIR + '/messages.dutch.hjson'

class Plugin:
    """ This is an example plugin with only a single callback. When
    a user says "Hello bot" in a room in which te bot is present,
    the user replies with "Hello <username>!".
    """

    def __init__(self, bot):
        # Load the configuration
        with open(CONFIG_LOCATION) as hjson_data:
            self.config = hjson.load(hjson_data)

        # Load ID of coupon
        with open(DATA_LOCATION) as hjson_data:
            self.coupon_id = hjson.load(hjson_data)

        # Load all messages for this plugin
        with open(MESSAGES_LOCATION) as hjson_data:
            self.messages = hjson.load(hjson_data)

        # Define sensitivity
        self.handler = []

        self.handler.append(MRegexHandler(
            "Peter coupon",
            self.grab_coupon_callback,
            bot))

        # initialize WooCommerce connection
        self.wcapi = API(
            url=self.config['rest_api']['shop_url'],
            consumer_key=self.config['rest_api']['consumer_key'],
            consumer_secret=self.config['rest_api']['consumer_secret'],
            wp_api=self.config['rest_api']['wp_api'],
            version=self.config['rest_api']['version'],
            query_string_auth=True
        )

        # Save parent bot
        self.bot = bot

    def grab_coupon_callback(self, room, event):
        coupon_json = self.wcapi.get(f"coupons/{self.coupon_id}").json()

        datetime_now = dt.datetime.now().strftime("%Y-%m-%dT%H:%M:%S")


        if coupon_json['expiry_date'] < datetime_now:
            # Refresh coupon

            # Create random token and determine max validity
            vld_days = self.config['coupon']['max_days']

            token = b64encode(os.urandom(8)).decode('utf-8').lower()[0:-1]
            expires_dat = (dt.datetime.now()
                + dt.timedelta(days = vld_days)).strftime(
                    "%Y-%m-%dT%H:%M:%S")

            data = {
                "code": token,
                "amount": self.config['coupon']['percentage'],
                "expiry_date": expires_dat,
            }

            self.wcapi.put(f"coupons/{self.coupon_id}", data)

            room.send_html(self.messages['coupon_message'].format(
                coupon_json["amount"].split('.')[0],
                token))

        else:
            room.send_html(self.messages['coupon_message'].format(
                coupon_json["amount"].split('.')[0],
                coupon_json["code"]))

    def help(self):
        return open(HELP_LOCATION, mode="r").read()

def setup():
    """This function initializes a coupon with a given percentage"""

    # Load the configuration
    with open(CONFIG_LOCATION) as hjson_data:
        config = hjson.load(hjson_data)

    # Create random token and determine max validity
    vld_days = config['coupon']['max_days']

    token = b64encode(os.urandom(8)).decode('utf-8').lower()[0:-1]
    expires_dat = (dt.datetime.now() + dt.timedelta(days = vld_days)).strftime(
        "%Y-%m-%dT%H:%M:%S")

    data = {
        "code": token,
        "discount_type": "percent",
        "amount": config['coupon']['percentage'],
        "individual_use": True,
        "exclude_sale_items": True,
        "expiry_date": expires_dat,
    }

    wcapi = API(
        url=config['rest_api']['shop_url'],
        consumer_key=config['rest_api']['consumer_key'],
        consumer_secret=config['rest_api']['consumer_secret'],
        wp_api=config['rest_api']['wp_api'],
        version=config['rest_api']['version'],
        query_string_auth=True
    )

    # Send to shop
    ret = wcapi.post("coupons", data).json()

    # Create data directory
    os.mkdir(DATA_DIR)

    # Write to JSON file to save ID
    with open(DATA_LOCATION, 'w') as hjson_data:
        hjson.dump(ret['id'], hjson_data)