#!/bin/bash

# Usage:
# Switch to the directory containing the files and run:
#
# ./grade.sh ../hw3
#
# where "~/hw3" is the directory containing your solution to homeworke 3.

TIMEOUT=10s
rm time.o # Not sure if it's automatically overwritten
gcc -Wall -c time.c -o time.o; # Where the magic happens
for i in $1/*; do
    echo =================================================
    echo Creating temp directory...
    TEMPDIR=`mktemp -d`
    TEMPDIR2=`mktemp -d`
    rm -fr $TEMPDIR $TEMPDIR2;
    mkdir -p $TEMPDIR $TEMPDIR2;
    echo Grading $i
    cp -r $i $TEMPDIR;
    pushd $TEMPDIR > /dev/null;
    find . -name "*.zip" -exec unzip {} -d $TEMPDIR \; > /dev/null 2>&1 ;
    find . -name "*.cpp" -exec cp -f {} $TEMPDIR2 \; > /dev/null 2>&1 ;
    find . -name "*.h" -exec cp -f {} $TEMPDIR2 \;  >/dev/null 2>&1;
    popd >/dev/null;
    cp book.txt $TEMPDIR2;
    cp time.o $TEMPDIR2;
    cp input $TEMPDIR2;
    cp output $TEMPDIR2;
    pushd $TEMPDIR2 >/dev/null;
    COMPILED_SUCCESFULLY=0;
	cd $TEM
    if g++ -Wall -Werror -ansi -Xlinker --wrap=time *.cpp time.o > /dev/null 2>&1;
    then echo Compiled successfully without errors and warnings;
        COMPILED_SUCCESFULLY=1;HASWARNING=0;
    else if g++ -ansi -Xlinker --wrap=time *.cpp time.o > /dev/null 2>&1;
    then echo Compiled successfully with warnings;
        COMPILED_SUCCESFULLY=1; HASWARNING=1;
    else echo 'Compilation was unsuccessful';
        COMPILED_SUCCESFULLY=0;
    fi;
    fi;
    if [ $COMPILED_SUCCESFULLY = 1 ]; then
        ./a.out < input > out 2>/dev/null &
        sleep $TIMEOUT;
	kill %1 >/dev/null ;
        if cmp -s output out;
        then echo 'Output matches reference (cmp byte-by-byte comparison)';
	else if diff -q output out > /dev/null;
        then echo 'Output matches reference (diff comparison)';
        else if diff -q -w -i -E -B -t output out > /dev/null;
        then echo 'Output matches reference (diff comparison, ignore whitespace, case)';
        else echo Output does NOT match;
	fi; fi;
    fi; fi;
    popd >/dev/null;
done;