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'''
Created on 13-Sep-2010

@author: rajveer
'''

from shop2020.logistics.service.impl import DataService
from shop2020.logistics.service.impl.DataService import Awb, AwbUpdate, Provider, \
     DeliveryEstimate, WarehouseAllocation, \
    PublicHolidays, ServiceableLocationDetails
from shop2020.thriftpy.logistics.ttypes import LogisticsServiceException,\
    DeliveryType
from shop2020.utils.Utils import log_entry, to_py_date, to_java_date
from elixir import session
import datetime, time
import sys
import logging
logging.basicConfig(level=logging.DEBUG)

warehouse_allocation_cache = {}
serviceable_location_cache = {}
delivery_estimate_cache = {}
ncr_pincodes = ['110001','110002','110003','110004','110005','110006','110007','110008','110009','110010','110011','110012','110013','110014','110015',\
                '110016','110017','110018','110019','110020','110021','110022','110023','110024','110025','110026','110027','110028','110029','110030',\
                '110031','110032','110033','110034','110035','110038','110041','110044','110045','110046','110047','110048','110049','110051','110052',\
                '110053','110054','110055','110056','110057','110058','110059','110060','110061','110062','110063','110064','110065','110066','110067',\
                '110068','110070','110071','110074','110075','110076','110078','110081','110082','110083','110084','110085','110086','110087','110088',\
                '110089','110091','110092','110093','110094','110095','110096','110101','110103','110104','110105','110106','110107','110108','110109',\
                '110110','110112','110113','110114','110115','110116','110117','110118','110119','110120','110122','110124','110125','110301','110302',\
                '110501','110502','110503','110504','110505','110510','110511','110512','110601','110602','110603','110604','110605','110606','110607',\
                '110608','110609','122001','122002','122003','122005','122006','122008','122009','122010','122015','122017','201010','201011','201012',\
                '201014','201301','201302','201303','201304','201305','201306','201307','201309','201310','201311']

chennai_pincodes = ['600001','600002','600003','600004','600005','600006','600007','600008','600009','600010','600011','600012','600013','600014',\
                    '600015','600016','600017','600018','600019','600020','600021','600022','600023','600024','600025','600026','600027','600028',\
                    '600029','600030','600031','600032','600033','600034','600035','600036','600037','600038','600039','600040','600041','600042',\
                    '600043','600044','600045','600046','600047','600049','600050','600051','600053','600054','600055','600056','600058','600059',\
                    '600060','600061','600062','600063','600064','600069','600070','600071','600073','600074','600075','600076','600077','600078',\
                    '600079','600080','600081','600082','600083','600084','600085','600086','600087','600088','600089','600090','600091','600092',\
                    '600093','600094','600095','600096','600097','600098','600099','600100','600101','600102','600104','600105','600106','600107',\
                    '600108','600110','600111','600112','600113','600118','600122','600126']
'''
This class is for only data transfer. Never used outside this module.
'''
class _DeliveryEstimateObject:
    def __init__(self, delivery_time, reliability, provider_id, warehouse_location, codAllowed):
        self.delivery_time = delivery_time
        self.reliability = reliability
        self.provider_id = provider_id
        self.warehouse_location = warehouse_location
        self.codAllowed = codAllowed
    
def initialize(dbname="logistics", db_hostname="localhost"):
    log_entry("initialize@DataAccessor", "Initializing data service")
    DataService.initialize(dbname, db_hostname)
    print "Starting cache population at: " + str(datetime.datetime.now())
    __cache_warehouse_allocation_table()
    __cache_serviceable_location_details_table()
    __cache_delivery_estimate_table()
    close_session()
    print "Done cache population at: " + str(datetime.datetime.now())

def __cache_delivery_estimate_table():
    delivery_estimates = DeliveryEstimate.query.all()
    for delivery_estimate in delivery_estimates:
        delivery_estimate_cache[delivery_estimate.destination_pin, delivery_estimate.provider_id, delivery_estimate.warehouse_location]\
        =delivery_estimate.delivery_time, delivery_estimate.reliability

def __cache_serviceable_location_details_table():
    serviceable_locations = ServiceableLocationDetails.query.all()
    for serviceable_location in serviceable_locations:
        try:
            provider_pincodes = serviceable_location_cache[serviceable_location.provider_id]
        except:
            provider_pincodes = {}
            serviceable_location_cache[serviceable_location.provider_id] = provider_pincodes 
        provider_pincodes[serviceable_location.dest_pincode] = serviceable_location.dest_code, serviceable_location.exp, serviceable_location.cod, serviceable_location.station_type 

def __cache_warehouse_allocation_table():
    warehouse_allocations = WarehouseAllocation.query.all()
    for warehouse_allocation in warehouse_allocations:
        warehouse_allocation_cache[warehouse_allocation.pincode]=warehouse_allocation.primary_warehouse_location

def get_provider(provider_id):
    provider =  Provider.get_by(id=provider_id)
    return provider

def get_providers():
    providers = Provider.query.filter_by(isActive = 1).all()
    return providers 

def get_logistics_estimation(destination_pin, item_selling_price, warehouse_location=None, type=DeliveryType.PREPAID):
    logging.info("Getting logistics estimation for pincode:" + destination_pin + " and warehouse location: " + str(warehouse_location))
    if warehouse_location is None:
        try:
            warehouse_location = warehouse_allocation_cache[destination_pin]
        except:
            print "Unexpected error:", sys.exc_info()[0]
            raise LogisticsServiceException(101, "No Warehouse locations assigned to this pincode: " + destination_pin)
    
    provider_id, codAllowed = __get_logistics_provider_for_destination_pincode(type, destination_pin, item_selling_price)
    
    if not provider_id:
        raise LogisticsServiceException(101, "No provider assigned for pincode: " + str(destination_pin) + \
                                        ", and warehouse location: " + str(warehouse_location))
    try:
        delivery_time = delivery_estimate_cache[destination_pin, provider_id, warehouse_location][0]
        reliability = delivery_estimate_cache[destination_pin, provider_id, warehouse_location][1]
        delivery_estimate = _DeliveryEstimateObject(delivery_time, reliability, provider_id, warehouse_location, codAllowed)
        return delivery_estimate
    except Exception as ex:
        print ex
        raise LogisticsServiceException(103, "No Logistics partner listed for this destination pincode and the primary warehouse")

def __get_logistics_provider_for_destination_pincode(type, destination_pin, item_selling_price):
    if ncr_pincodes.__contains__(destination_pin):
        if item_selling_price <= 20000:
            return 3, True
    if type == DeliveryType.COD and chennai_pincodes.__contains__(destination_pin):
        if item_selling_price <= 10000:
            return 3, True        
    if serviceable_location_cache.get(1).has_key(destination_pin):
        dest_code, exp, iscod, station_type = serviceable_location_cache.get(1).get(destination_pin)
        iscod = iscod and item_selling_price <= 10000
        return 1, iscod
    elif type == DeliveryType.PREPAID and chennai_pincodes.__contains__(destination_pin):
        return 3, False
    else:
        return None, False    

        
def add_empty_AWBs(numbers, provider_id, type):
    for number in numbers:
        query = Awb.query.filter_by(awb_number = number, provider_id = provider_id)
        try:
            query.one()
        except:    
            awb = Awb()
            awb.awb_number = number
            awb.provider_id = provider_id
            awb.is_available = True
            awb.type = type
    session.commit()

def set_AWB_as_used(awb_number):
    query = Awb.query.filter_by(awb_number = awb_number)
    awb = query.one() 
    awb.is_available=False
    session.commit()
    
def get_empty_AWB(provider_id, type = DeliveryType.PREPAID):
    query = Awb.query.with_lockmode("update").filter_by(provider_id = provider_id, is_available = True)  #check the provider thing
    if type == DeliveryType.PREPAID:
        query = query.filter_by(type="Prepaid")
    if type == DeliveryType.COD:
        query = query.filter_by(type="COD")
    
    try:
        awb = query.first()
        awb.is_available = False
        session.commit()
        return awb.awb_number
    except:
        raise LogisticsServiceException(103, "Unable to get an AWB for the given Provider: " + str(provider_id))

def get_free_awb_count(provider_id, type):
    count = Awb.query.filter_by(provider_id = provider_id, is_available = True, type=type).count()
    if count == None:
        count = 0
    return count
   
def get_shipment_info(awb_number, provider_id):
    awb = Awb.get_by(awb_number = awb_number, provider_id = provider_id)
    query = AwbUpdate.query.filter_by(awb = awb)
    info = query.all()
    return info

def get_holidays(start_date, end_date):
    query = PublicHolidays.query
    if start_date != -1:
        query = query.filter(PublicHolidays.date >= to_py_date(start_date))
    if end_date != -1:
        query = query.filter(PublicHolidays.date <= to_py_date(end_date))
    holidays = query.all()
    holiday_dates = [to_java_date(datetime.datetime(*time.strptime(str(holiday.date), '%Y-%m-%d')[:3])) for holiday in holidays] 
    return holiday_dates

def get_provider_for_pickup_type(pickUp):
    return Provider.query.filter(Provider.pickup == pickUp).first().id

def close_session():
    if session.is_active:
        print "session is active. closing it."
        session.close()

def is_alive():
    try:
        session.query(Awb.id).limit(1).one()
        return True
    except:
        return False