#!/bin/bash


IFS=$'\t'
case "$1" in
   "-T" )
   echo is it -T
   total=0
   while read ID description manufacurer price quantity
   do
     if [ $ID == $2 ]; then
     echo $price   $quantity
       total=$((price*quantity))
     fi
   done <"products.txt"
   echo Total value of $discription is $total
   ;;
   "-n" )
   echo it is -n
   while read name ID date
   do
   if [ $name == $2 ]; then
   while read PID description manufacturer price quantity
   do
      if [ $PID == $ID ]; then
        echo $name bought $description and its price is $price
      fi
   done<"products.txt"
   fi
   done <"names.txt"
   ;;
   "-N")
   total=0
   while read Name ID Date
   do
     if [ $Name == $2 ]; then
        while read PID Desc manufacturer price inventory
	do
	  if [ $ID == $PID ]; then
	  total=$((total+price))
	  fi
	done <"products.txt"
     fi
   done <"names.txt"
   echo $Name spent $total
   ;;
   "-I")
   while read Name ID Date
   do
   if [ $ID == $2 ]; then
       echo -n "$Name, "
   fi
   done <"names.txt"
   while read ID Desc Manug price inventory
   do
     if [ $ID == $2 ]; then
     echo bought $Desc
     fi
   done <"products.txt"
   ;;
   *)
   echo somethign else
   ;;
esac