# Twisted/Klein imports
from twisted.logger import Logger

# Project imports
from settings import settings


class Markets(object):
    """ "
    Markets handler for generic market functions.
    """

    def __init__(self):
        self.log = Logger("markets")

    def autoprice(self, ads, currency):
        """
        Helper function to automatically adjust the price up/down in certain markets
        in order to gain the most profits and sales.
        :param ads: list of ads
        :type ads: list of lists
        :param currency: currency of the ads
        :type currency: string
        :return: the rate we should use for this currency
        :rtype: float
        """
        self.log.debug("Autoprice starting for {x}", x=currency)
        # Find cheapest ad
        # Filter by 3rd index on each ad list to find the cheapest
        min_margin_ad = min(ads, key=lambda x: x[4])
        self.log.debug("Minimum margin ad: {x}", x=min_margin_ad)

        # Find second cheapest that is not us
        # Remove results from ads that are us
        ads_without_us = [ad for ad in ads if not ad[1] == settings.Agora.Username]
        self.log.debug("Ads without us: {x}", x=ads_without_us)
        # Find ads above our min that are not us
        ads_above_our_min_not_us = [ad for ad in ads_without_us if ad[4] > float(settings.Agora.MinMargin)]
        self.log.debug("Ads above our min not us: {x}", x=ads_above_our_min_not_us)
        # Check that this list without us is not empty
        if ads_without_us:
            # Find the cheapest from these
            min_margin_ad_not_us = min(ads_without_us, key=lambda x: x[4])
            self.log.debug("Min margin ad not us: {x}", x=min_margin_ad_not_us)
            # Lowball the lowest ad that is not ours
            lowball_lowest_not_ours = min_margin_ad_not_us[4]  # - 0.005
            self.log.debug("Lowball lowest not ours: {x}", x=lowball_lowest_not_ours)

        # Check if the username field of the cheapest ad matches ours
        if min_margin_ad[1] == settings.Agora.Username:
            self.log.debug("We are the cheapest for: {x}", x=currency)
            # We are the cheapest!
            # Are all of the ads ours?
            all_ads_ours = all([ad[1] == settings.Agora.Username for ad in ads])
            if all_ads_ours:
                self.log.debug("All ads are ours for: {x}", x=currency)
                # Now we know it's safe to return the maximum value
                return float(settings.Agora.MaxMargin)
            else:
                self.log.debug("All ads are NOT ours for: {x}", x=currency)
                # All the ads are not ours, but we are first...
                # Check if the lowballed, lowest (that is not ours) ad's margin
                # is less than our minimum
                if lowball_lowest_not_ours < float(settings.Agora.MinMargin):
                    self.log.debug("Lowball lowest not ours less than MinMargin")
                    return float(settings.Agora.MinMargin)
                elif lowball_lowest_not_ours > float(settings.Agora.MaxMargin):
                    self.log.debug("Lowball lowest not ours more than MaxMargin")
                    return float(settings.Agora.MaxMargin)
                else:
                    self.log.debug("Returning lowballed figure: {x}", x=lowball_lowest_not_ours)
                    return lowball_lowest_not_ours
        else:
            self.log.debug("We are NOT the cheapest for: {x}", x=currency)
            # We are not the cheapest :(
            # Check if this list is empty
            if not ads_above_our_min_not_us:
                # Return the maximum margin?
                return float(settings.Agora.MaxMargin)
            # Find cheapest ad above our min that is not us
            cheapest_ad = min(ads_above_our_min_not_us, key=lambda x: x[4])
            cheapest_ad_margin = cheapest_ad[4]  # - 0.005
            if cheapest_ad_margin > float(settings.Agora.MaxMargin):
                self.log.debug("Cheapest ad not ours more than MaxMargin")
                return float(settings.Agora.MaxMargin)
            self.log.debug("Cheapest ad above our min that is not us: {x}", x=cheapest_ad)
            return cheapest_ad_margin