import yaml
import json
import logging
import random

from db.queries import repeat_get, repeat_increment, repeat_clear, repeat_put
from settings import ORDERS_YML

logger = logging.getLogger(__name__)

def pick_order(orders):
    picked = random.choices(orders,
                            weights=[o.weight for o in orders],
                            k=1)[0]

    result = []
    
    result.append(picked.name)

    for add_on in picked.add_ons:
        if add_on.probability > random.random():
            result.append(add_on.name)

    return (result, picked.repeat)

def read_config():
    with open(ORDERS_YML) as stream:
        try:
            orders = yaml.safe_load(stream)
        except yaml.YAMLError as exc:
            logger.error(exc)
    return orders

def generate_order(orders_pool):
    # Do we want to repeat?
    if orders_pool.repeat.count() != 0:
        repeat = orders_pool.repeat.get()
        if repeat.probability > random.random():
            repeat_increment(repeat.id)
            return {
                "orders": json.loads(repeat.orders),
                "count": repeat.count
            }
        else:
            repeat_clear(repeat.id)

    if orders_pool.probability < random.random():
        # No orders today
        return { }

    # Pick new orders
    (result, repeat_p) = pick_order(orders_pool.orders)

    # Log the repeat
    if repeat_p > 0.0:
        repeat_put(orders_pool.id, repeat_p, json.dumps(result))
    
    return {
        "orders": result
    }

def generate_punishment(orders_pool):
    # Pick new orders
    (result, repeat_p) = pick_order(orders_pool.orders)

    return {
        "orders": result
    }