# coding=utf-8
import typing
from apilib.monetary import RMB
from apps.web.report.ledger import LedgerConsumeOrder
from collections import namedtuple
from apps.web.dealer.proxy import DealerGroupStats

if typing.TYPE_CHECKING:
    from apps.web.dealer.models import Dealer, DealerDict


class Stats(namedtuple("Stats", ["amount", "bestowAmount", "profit", "elecFee", "orderCount", "elecCount", "duration"])):

    def as_dict(self):
        return self._asdict()


class LedgerStatsCalculator(object):
    """
    分润统计计算器
    """

    def __init__(self, orders, dealer):     # type:(list, Dealer) -> None
        self._orders = orders
        self._dealer = dealer

    def calculate(self):    # type:() -> Stats
        amount = RMB(0)
        bestowAmount = RMB(0)
        profit = RMB(0)
        elecFee = RMB(0)
        orderCount = 0
        elecCount = 0.0
        duration = 0

        for _order in self._orders:     # type: DealerGroupStats
            amount += _order.amount
            bestowAmount += _order.bestowAmount
            orderCount += _order.orderCount
            elecCount += _order.elecCount
            duration += _order.duration
            elecFee += _order.group.elecFee * _order.elecCount

            if _order.is_ledgered:
                partition = _order.ledger.partition
            else:
                partition = LedgerConsumeOrder(_order).get_partition_map()

            profit += self._get_profit_by_partition(partition)

        return Stats(
            amount=amount,
            bestowAmount=bestowAmount,
            profit=profit,
            elecFee=elecFee,

            orderCount=orderCount,
            elecCount=elecCount,
            duration=duration
        )

    def _get_profit_by_partition(self, partition):  # type: (list) -> RMB
        """
        [
            {
                "role" : "partner",
                "share" : NumberDecimal("20"),
                "id" : "62188d6f1bab8edffc4d88af",
                "elecFee" : NumberDecimal("2.00"),
                "money" : NumberDecimal("-0.40")
            },
            {
                "role" : "owner",
                "share" : NumberDecimal("80"),
                "id" : "62188a891bab8edffc4d88ad",
                "money" : NumberDecimal("-1.60")
            }
        ]
        """
        for _item in partition:
            if _item["id"] == str(self._dealer.id):
                item = _item
                break
        else:
            item = None

        if not item:
            return RMB(0)

        return RMB(item.get("money", RMB(0))) + RMB(item.get("elecFee", RMB(0)))


def get_stats(date, groupIds):
    """
    获取统计记录
    """
    return DealerGroupStats.objects.filter(
        date=date,
        groupId__in=groupIds
    )