Subversion Repositories SmartDukaan

'''
Created on 05-Aug-2010

@author: ashish
'''
from shop2020.thriftpy.logistics.ttypes import LogisticsInfo,\
    LogisticsServiceException
from shop2020.logistics.service.impl.DataAccessor import get_empty_AWB,\
    get_shipment_info, initialize, get_logistics_estimation, get_provider,\
    get_providers, close_session, get_free_awb_count, get_holidays
from shop2020.logistics.service.impl.Converters import to_t_awbupdate,\
    to_t_provider
from shop2020.clients.InventoryClient import InventoryClient
from shop2020.config.client.ConfigClient import ConfigClient
import datetime
import math
import sys
from shop2020.logistics.service.impl.DataService import ServiceableLocationDetails,\
    PublicHolidays

class LogisticsServiceHandler:
    
    def __init__(self, dbname='logistics'):
        initialize(dbname)
        try:
            config_client = ConfigClient()
            self.cutoff_time = int(config_client.get_property('delivery_cutoff_time'))
            self.stock_threshold = int(config_client.get_property('inventory_stock_threshold'))
            self.time_to_producre = int(config_client.get_property('inventory_time_to_procure'))
            self.default_pincode = int(config_client.get_property('default_pincode'))
        except Exception as ex:
            print "[ERROR] Unexpected config error:", sys.exc_info()[0]
            self.cutoff_time = 15
            self.stock_threshold = 2
            self.time_to_producre = 48
            self.default_pincode = "110001" 
        
        ##FIXME 
        self.kanwaar_effected_pins_by_two_days = ['244713', '247667', '248001', '248002', '248003', '248005', '248006', 
                                             '248008', '248009', '248110', '248146', '248171', '248179', '249201', 
                                             '249401', '249403', '249404', '249407', '249408', '249409', '249410', 
                                             '249411', '262405', '263139', '263153']
        self.kanwaar_effected_pins_by_one_day = ['201001', '201002', '201003', '201004', '201005', '201007', '201009', 
                                            '201010', '201011', '201012', '201014', '201204', '202001', '202002', 
                                            '203001', '203131', '204101']
            
    def getProvider(self, providerId):
        """
        Returns a provider for a given provider ID. Throws an exception if none found.
        
        Parameters:
         - providerId
        """
        try:
            provider = get_provider(providerId)
            if provider:
                return to_t_provider(provider)
            else:
                raise LogisticsServiceException(101, "No Provider found for the given id")
        finally:
            close_session()
            
    def getAllProviders(self, ):
        """
        Returns a list containing all the providers.
        """
        try:
            return [to_t_provider(provider) for provider in get_providers()]
        finally:
            close_session()
            
    def getLogisticsInfo(self, destination_pincode, itemId):
        """
        Parameters:
         - destination_pincode
         - item_id
        """
        try:
            logistics_info = self.getLogisticsEstimation(itemId, destination_pincode)
            logistics_info.airway_billno = get_empty_AWB(logistics_info.providerId)
            return logistics_info
        finally:
            close_session()
            
    def getEmptyAWB(self, provider_id):
        """
        Parameters:
         - provider_id
        """
        try:
            return get_empty_AWB(provider_id)
        finally:
            close_session()
            
    def getShipmentInfo(self, awb, providerId):
        """
        Parameters:
         - awb
         - providerId
        """
        try:
            awb_updates = get_shipment_info(awb, providerId)
            t_updates = []
            for update in awb_updates:
                t_updates.append(to_t_awbupdate(update))
            return t_updates
        finally:
            close_session()
            
    def getLogisticsEstimation(self, itemId, destination_pin):
        """
        Parameters:
         - itemId
         - destination_pin
        """
        try:
            if not destination_pin:
                destination_pin = self.default_pincode
            try:
                client = InventoryClient().get_client()
                item = client.getItem(itemId)
            except Exception as ex:
                raise LogisticsServiceException(103, "Unable to fetch inventory information about this item.")

            delivery_estimate = get_logistics_estimation(destination_pin, item.sellingPrice)
            if delivery_estimate is None:
                raise LogisticsServiceException(104, "Unable to fetch delivery estimate for this pincode.")
            
            warehouse_loc = delivery_estimate.warehouse_location
            try:
                #Get the id and location of actual warehouse that'll be used to fulfill this order.
                warehouse_loc, warehouse_id, items_in_inventory = client.getItemAvailabilityAtLocation(warehouse_loc, itemId)
            except Exception as ex:
                raise LogisticsServiceException(103, "Unable to fetch inventory information about this item.")
            
            # We are revising the estimated based on the actual warehouse that will be assigned to this order.
            # This warehouse may be located in a different zone that the one we allocated for this pincode.
            delivery_estimate = get_logistics_estimation(destination_pin, item.sellingPrice, warehouse_loc)
            if delivery_estimate is None:
                raise LogisticsServiceException(105, "Unable to fetch delivery estimate for pincode: " + destination_pin + " and revised location: " + str(warehouse_loc))
            
            delivery_time = 24*delivery_estimate.delivery_time
            
            # Increase the estimate if the actual stock is less than the threshold 
            if items_in_inventory < self.stock_threshold :
                delivery_time = delivery_time + self.time_to_producre
            
            #Further increase the estimate if it's late in the day
            if self.cutoff_time <= datetime.datetime.now().hour:
                delivery_time = delivery_time + 24
            
            delivery_time = int(math.ceil(delivery_time/24.0))
            
            
            ## FIXME Due to Kanwaar on the delhi Dehradun route deliveries on following pin codes will be effected.
            ## Changing as per ticket number #462
            if destination_pin in self.kanwaar_effected_pins_by_two_days:
                delivery_time += 2;
            elif destination_pin in self.kanwaar_effected_pins_by_one_day:
                delivery_time += 1;
            ## FIXME Remove the above code once Kanwaar season is over    
            
            logistics_info = LogisticsInfo()
            logistics_info.deliveryTime = delivery_time
            logistics_info.providerId = delivery_estimate.provider_id
            logistics_info.warehouseId = warehouse_id
            
            return logistics_info
        finally:
            close_session()
                    
    def getDestinationCode(self, providerId, pinCode):
        """
        Returns the short three letter code of a pincode for the given provider.
        Raises an exception if the pin code is not serviced by the given provider.
        
        Parameters:
         - providerId
         - pinCode
        """
        try:
            sld = ServiceableLocationDetails.get_by(provider_id = providerId, dest_pincode = pinCode)
            if sld != None:
                return sld.dest_code
            else:
                raise LogisticsServiceException(101, "The pincode " + pinCode + " is not serviced by this provider: " + str(providerId))
        finally:
            close_session()

    def getFreeAwbCount(self, providerId):
        """
        Returns the number of unused AWB numbers for the given provider
        
        Parameters:
         - providerId
        """
        try:
            return get_free_awb_count(providerId)
        finally:
            close_session()

    def getHolidays(self, fromDate, toDate):
        """
        Returns list of Holiday dates between fromDate and toDate (both inclusive)
        fromDate should be passed as milliseconds corresponding to the start of the day.
        If fromDate is passed as -1, fromDate is not considered for filtering
        If toDate is passed as -1, toDate is not considered for filtering
        
        Parameters:
         - fromDate
         - toDate
        """
        try:
            return get_holidays(fromDate, toDate)
        finally:
            close_session()
        
    def closeSession(self, ):
        close_session()