#!/bin/bash

####################################################################
# 
# Matthew Page
# me@matthewjpage.com
# 10/25/2014
# CSCS 1730 Unix/Linux
#
# gradescript - a script to take the output from the status script
#               and then calculate the grade, section by section, 
#               and then ultimately calculate the overall grade.
#
####################################################################

status unix > gradescript.dat 

#ATTENDANCE SECTION
attendance_total=`cat gradescript.dat | grep UNIX | tr " " "\n" | grep -v "^$" | grep -v "UNIX" | wc -l`
attendance_missed=`cat gradescript.dat | grep $USER | tr " " "\n" | grep -v "^$" | grep -v $USER | grep 'X' | wc -l `
attendance_user=$(echo "($attendance_total-$attendance_missed)" | bc -l)
attendance_percent=$(echo "($attendance_user/$attendance_total)*100" | bc -l | cut -d '.' -f1)

#OPUS SECTION
opus_points_total=`cat gradescript.dat | sed -n '/OPUS/,/PROJECTS/p' | cut -d ':' -f1 | grep -v "^$" | grep -v "OPUS" | grep -v "PROJECTS" | wc -l`
opus_points_earned=`cat gradescript.dat | sed -n '/OPUS/,/PROJECTS/p' | cut -d ':' -f1 | grep -v "^$" | grep -v "OPUS" | grep -v "PROJECTS" | grep '1' | wc -l`
opus_percent=$(echo "($opus_points_earned/$opus_points_total)*100" | bc -l | cut -d '.' -f1)

#PROJECT SECTION
project_points_total=`cat gradescript.dat | sed -n '/PROJECTS/,/SUBMISSION/p' | cut -d ':' -f1 | grep -v "^$" | grep -v "PROJECTS" | grep -v "SUBMISSION" | wc -l`
project_points_earned=`cat gradescript.dat | sed -n '/PROJECTS/,/SUBMISSION/p' | cut -d ':' -f1 | grep -v "^$" | grep -v "PROJECTS" | grep -v "SUBMISSION" | grep '1' | wc -l`
project_percent=$(echo "($project_points_earned/$project_points_total)*100" | bc -l | cut -d '.' -f1)

#WEIGHTED SECTION
weighted_attendance=$(echo "(28*$attendance_user)/$attendance_total" | bc -l | cut -d '.' -f1)
weighted_opus=$(echo "(36*$opus_points_earned)/$opus_points_total" | bc -l | cut -d '.' -f1)
weighted_project=$(echo "(36*$project_points_earned)/$project_points_total" | bc -l | cut -d '.' -f1)

#TOTAL GRADE
total_grade=$(echo "($weighted_attendance+$weighted_opus+$weighted_project)" | bc -l)

#OUTPUT RESULTS
echo "You attended $attendance_user out of $attendance_total class days for $attendance_percent% Attendance score."
echo "You completed $opus_points_earned opus entries out of $opus_points_total for $opus_percent% Opus score."
echo "You earned $project_points_earned project points out of $project_points_total for $project_percent% Projects score."
echo "For a total grade of $total_grade in Unix/Linux class!"