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import pymongo

from datetime import datetime, timedelta, time, date

from shop2020.thriftpy.model.v1.order.ttypes import AmazonFCWarehouseLocation

from shop2020.utils.Utils import to_java_date, to_py_date

from shop2020.thriftpy.model.v1.order.ttypes import AmazonFbaSalesSnapshot, AmazonHourlySaleSnapshot

con = None

def get_mongo_connection(host='localhost', port=27017):

    global con

    if con is None:

        print "Establishing connection %s host and port %d" %(host,port)

        try:

            con = pymongo.MongoClient(host, port)

        except Exception, e:

            print e

            return None

    return con

def to_amazonFbaSaleSnapshot(saleSnapshot):

    amazonFbaSaleSnapshot = AmazonFbaSalesSnapshot(dateOfSale=0, item_id=0, totalOrderCount=0, amazonFbaInventory=0, isOutOfStock=False, salePrice=0, minFbaPrice=0, minMfnPrice=0, totalSale=0, promotionSale=0, promotionOrderCount=0, ourPrice=0, minFbaPriceSnapshotDate=0, minMfnPriceSnapshotDate=0, ourPriceSnapshotDate=0, salePriceSnapshotDate=0, fcLocation=None)

    if saleSnapshot is None:

        return amazonFbaSaleSnapshot

    amazonFbaSaleSnapshot.__dict__.update(saleSnapshot)

    return amazonFbaSaleSnapshot

def to_amazonFbaHourlySnapshot(saleSnapshot):

    amazonHourlySaleSnapshot = AmazonHourlySaleSnapshot(snapshotTime=0, item_id=0, totalOrderCount=0, amazonFbaInventory=0, isOutOfStock=False,  totalSale=0, promotionSale=0, promotionOrderCount=0,  fcLocation=None)

    if saleSnapshot is None:

        return amazonHourlySaleSnapshot

    amazonHourlySaleSnapshot.__dict__.update(saleSnapshot)

    return amazonHourlySaleSnapshot

def getAmazonFbaSalesLatestSnapshotForItemLocationWise(item_id,fcLocation):

    collection = get_mongo_connection().AmazonSaleSnapshot.AmazonDailySaleSnapshot

    list = []

    list.append({"dateOfSale": to_java_date(datetime.combine((datetime.now()-timedelta(days=1)).date(), time(00,00,00)))})

    list.append({"item_id":item_id})

    list.append({"fcLocation":AmazonFCWarehouseLocation._VALUES_TO_NAMES.get(fcLocation)})

    r = collection.find({"$and":list}).sort([('dateOfSale',pymongo.DESCENDING)]).limit(1)

    if r.count() > 0:

        return to_amazonFbaSaleSnapshot(r.next())

    else:

        return to_amazonFbaSaleSnapshot(None)

def getInStockAmazonFbaSalesLatestSnapshotForItemLocationWise(item_id,fcLocation,outOfStockTime):

    fbasalessnapshot = []

    collection = get_mongo_connection().AmazonSaleSnapshot.AmazonDailySaleSnapshot

    toDate = datetime.now()-timedelta(days = 1)

    fromDate = outOfStockTime

    list = []

    list.append({"item_id":item_id})

    list.append({"fcLocation":AmazonFCWarehouseLocation._VALUES_TO_NAMES.get(fcLocation)})

    query = {}

    query['$gt'] = fromDate 

    query['$lte'] = to_java_date(datetime.combine(toDate.date(), time(00,00,00)))

    list.append({"dateOfSale":query})

    cursor = collection.find({"$and":list}).sort([('dateOfSale',pymongo.ASCENDING)])

    totalSale = 0

    noOfDays = 0

    for sale in cursor:

        totalSale = totalSale + sale.get('totalOrderCount')

        noOfDays = noOfDays + 1 

    return totalSale, noOfDays 

def getAmazonFbaSalesSnapshotForDays(interval):

    fbasalessnapshot = []

    collection = get_mongo_connection().AmazonSaleSnapshot.AmazonDailySaleSnapshot

    toDate = datetime.now()-timedelta(days = 1)

    fromDate = toDate-timedelta(days = interval)

    query = {}

    query['$gte'] = to_java_date(datetime.combine(fromDate.date(), time(00,00,00)))

    query['$lte'] = to_java_date(datetime.combine(toDate.date(), time(00,00,00)))

    cursor = collection.find({"dateOfSale":query}).sort([('dateOfSale',pymongo.ASCENDING)])

    for sale in cursor:

        fbasalessnapshot.append(to_amazonFbaSaleSnapshot(sale))

    return fbasalessnapshot

def getLastOutOfStock(item_id,fcLocation):

    collection = get_mongo_connection().AmazonSaleSnapshot.AmazonDailySaleSnapshot

    list = []

    list.append({"item_id":item_id})

    list.append({"fcLocation":AmazonFCWarehouseLocation._VALUES_TO_NAMES.get(fcLocation)})

    list.append({"isOutOfStock":True})

    r = collection.find({"$and":list}).sort([('dateOfSale',pymongo.DESCENDING)]).limit(1)

    if r.count() > 0:

        lastOutOfStock = to_amazonFbaSaleSnapshot(r.next())

    else:

        lastOutOfStock = to_amazonFbaSaleSnapshot(None)

    if lastOutOfStock.dateOfSale == 0:

        return lastOutOfStock, 0, 0

    else:

        totalSale, noOfDays =getInStockAmazonFbaSalesLatestSnapshotForItemLocationWise(item_id,fcLocation,lastOutOfStock.dateOfSale)

        return lastOutOfStock, totalSale, noOfDays 

def getLatestHourlySnapshot():

    fbaHourlySnapshot = []

    collection = get_mongo_connection().AmazonSaleSnapshot.AmazonHourlySaleSnapshot

    r = collection.find().sort([('snapshotTime',pymongo.DESCENDING)]).limit(1)

    lastestSnapshotTime = r.next().get('snapshotTime')

    cursor = collection.find({"snapshotTime":{"$in":[lastestSnapshotTime]}})

    for sale in cursor:

        fbaHourlySnapshot.append(to_amazonFbaHourlySnapshot(sale))

    return fbaHourlySnapshot

def main():

    print getLatestHourlySnapshot()

if __name__ == "__main__":

    main()