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# base directory of retail_db and output path are passed as arguments
# spark-submit daily_revenue.py /Users/itversity/Research/data/retail_db /Users/itversity/Research/revenue_per_day --master local

from pyspark import SparkContext, SparkConf
import sys

conf = SparkConf().setAppName("Daily Revenue").setMaster("local")
sc = SparkContext(conf=conf)

orders = sc.textFile(sys.argv[1] + "/orders")
ordersFiltered = orders.filter(lambda rec: rec.split(",")[3] == "COMPLETE" or rec.split(",")[3] == "CLOSED")
ordersFilteredMap = ordersFiltered.map(lambda rec: (int(rec.split(",")[0]), rec.split(",")[1]))

orderItems = sc.textFile(sys.argv[1] + "/order_items")
orderItemsMap = orderItems.map(lambda rec: (int(rec.split(",")[1]), float(rec.split(",")[4])))
ordersJoin = ordersFilteredMap.join(orderItemsMap)
ordersJoinMap = ordersJoin.map(lambda rec: rec[1])

ordersJoinMap = ordersJoin.map(lambda rec: rec[1])
orderRevenuePerDay = ordersJoinMap.reduceByKey(lambda agg, val: agg + val)

orderRevenuePerDay.\
map(lambda rec: rec[0] + "\t" + str(rec[1])).\
saveAsTextFile(sys.argv[2])