#!/bin/bash

# to make the script fail safely
set -euo pipefail


out=${1:-output}

echo "" > $out

echo "Below is the feedback and provisional marks for your submission" >> $out
echo "for core assignment 8.  Please note all marks are provisional until" >> $out
echo "ratified by the assessment board -- this is not an official" >> $out
echo "results transcript." >> $out
echo "" >> $out

# marks for core CW8
marks=$(( 0 ))

# compilation tests

function scala_compile {
    (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala "$1" 2>> $out 1>> $out)
}

# functional tests

function scala_assert {
    (ulimit -t 40; JAVA_OPTS="-Xmx1g" scala -i "$1" -- "$2" 2> /dev/null 1> /dev/null)
}

function scala_assert_long {
  (ulimit -t 60; JAVA_OPTS="-Xmx1g" scala -i "$1" -- "$2" 2> /dev/null 1> /dev/null)
}

#function scala_assert_elong {
#  (ulimit -t 90; JAVA_OPTS="-Xmx1g" scala -i "$1" -- "$2" 2> /dev/null 1> /dev/null)
#}

# purity test

function scala_vars {
   (egrep '\bvar\b|\breturn\b|\.par|ListBuffer|mutable|new Array' "$1" 2> /dev/null 1> /dev/null)
}

# knights1: purity test

echo -e "knight1.scala does not contain vars, returns,  Arrays, ListBuffers etc?" | tee -a $out

if (scala_vars knight1.scala)
then
  echo -e "  --> TEST FAILED\n" | tee -a $out
  tsts0=$(( 1 ))
else
  echo -e "  --> success" | tee -a $out
  tsts0=$(( 0 )) 
fi


# compilation test

if [ $tsts0 -eq 0 ]
then    
  echo -e "knight1.scala runs?" | tee -a $out

  if (scala_compile knight1.scala)
  then
    echo -e "  --> success " | tee -a $out
    tsts1=$(( 0 ))
  else
    echo -e "  --> SCALA DID NOT RUN knight1.scala\n" | tee -a $out
    tsts1=$(( 1 )) 
  fi
else
  tsts1=$(( 1 ))   
fi


### knight4 test

if [ $tsts1 -eq 0 ]
then
  echo -e " Let f = (x:(Int, Int)) => if (x._1 > 3) Some(List(x)) else None " | tee -a $out
  echo -e "   first(List((1,0),(2,0),(3,0),(4,0)), f) == Some(List((4,0)))" | tee -a $out
  echo -e "   first(List((1,0),(2,0),(3,0)), f) == None" | tee -a $out  
  
  if (scala_assert "knight1.scala" "knight1_test4.scala") 
  then
      echo -e "  --> success" | tee -a $out
      marks=$(( marks + 1 ))
  else
      echo -e "  --> TEST FAILED\n" | tee -a $out
  fi
fi

### knight5 test

if [ $tsts1 -eq 0 ]
then
  echo -e " is first_tour(6, List((0, 0))) ok? " | tee -a $out
  echo -e " is first_tour(4, List((0, 0))) == None " | tee -a $out
  START=$(date +%s)
  
  if (scala_assert_long "knight1.scala" "knight1_test5.scala") 
  then
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out  
      echo -e "  --> success" | tee -a $out
      marks=$(( marks + 1 ))
  else
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out 
      echo -e "  --> TEST FAILED\n" | tee -a $out
  fi
fi



# knights2: purity test
#
echo "knight2.scala does not contain vars, returns, Arrays, ListBuffers etc?" | tee -a $out


if (scala_vars knight2.scala)
then
  echo -e "  --> TEST FAILED\n" | tee -a $out
  tsts0=$(( 1 ))
else
  echo -e "  --> success" | tee -a $out
  tsts0=$(( 0 )) 
fi


# compilation test
if  [ $tsts0 -eq 0 ]
then    
  echo "knight2.scala runs?" | tee -a $out

  if (scala_compile knight2.scala)
  then
    echo -e "  --> success" | tee -a $out
    tsts1=$(( 0 ))
  else
    echo -e "  --> SCALA DID NOT RUN knight2.scala\n" | tee -a $out
    tsts1=$(( 1 )) 
  fi
else
  tsts1=$(( 1 ))     
fi

# ordered move test

if [ $tsts1 -eq 0 ]
then
  echo -e " ordered_moves(8, List((3,4), (3,2)), (1,3)) == List((0,1), (0,5), (2,1), (2,5))" | tee -a $out
  echo -e " ordered_moves(8, List((4,0)), (0,0)) == List((2,1), (1,2))" | tee -a $out
  echo -e " ordered_moves(8, List((0,4)), (0,0)) == List((1,2), (2,1))" | tee -a $out
  
  if (scala_assert "knight2.scala" "knight2_test6.scala")
  then
      echo -e "  --> success" | tee -a $out
      marks=$(( marks + 1 ))
  else
      echo -e "  --> TEST FAILED\n" | tee -a $out
  fi
fi


# first-closed-tour test

if [ $tsts1 -eq 0 ]
then
  echo -e " first_closed_tour_heuristics(6, List((3,3))) found and correct?" | tee -a $out
  START=$(date +%s)
  
  if (scala_assert "knight2.scala" "knight2_test7.scala")
  then
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out 
      echo -e "  --> success" | tee -a $out
      marks=$(( marks + 1 ))
  else
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out 
      echo -e "  --> TEST FAILED\n" | tee -a $out
  fi
fi


# first-tour test

if [ $tsts1 -eq 0 ]
then
  echo -e " first_tour_heuristics(8, List((0,0))) found and correct?" | tee -a $out
  echo -e " first_tour_heuristics(30, List((0,0))) found and correct?" | tee -a $out
  START=$(date +%s)
  
  if (scala_assert_long "knight2.scala" "knight2_test8.scala")
  then
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out
      echo -e "  --> success" | tee -a $out
      marks=$(( marks + 1 ))
  else
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out
      echo -e "  --> TEST FAILED\n" | tee -a $out
  fi
fi



# knights3: purity test
#
echo -e "knight3.scala does not contain vars, returns, Arrays, ListBuffers etc?" | tee -a $out


if (scala_vars knight3.scala)
then
  echo "  --> TEST FAILED\n" | tee -a $out
  tsts0=$(( 1 ))
else
  echo "  --> success" | tee -a $out
  tsts0=$(( 0 )) 
fi

# compilation test
if  [ $tsts0 -eq 0 ]
then    
  echo "knight3.scala runs?" | tee -a $out

  if (scala_compile knight3.scala)
  then
    echo "  --> success" | tee -a $out
    tsts1=$(( 0 ))
  else
    echo -e "  --> SCALA DID NOT RUN knight3.scala\n" | tee -a $out  
    tsts1=$(( 1 )) 
  fi
else
  tsts1=$(( 1 ))     
fi


if [ $tsts1 -eq 0 ]
then
  echo -e " tour_on_mega_board(70, List((0,0))) found and correct?" | tee -a $out
  START=$(date +%s)
  
  if (scala_assert_long "knight3.scala" "knight3_test9.scala")
  then
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out
      echo -e "  --> success" | tee -a $out
      marks=$(( marks + 1 ))
  else
      END=$(date +%s)
      DIFF=$(( $END - $START ))
      echo "  It took $DIFF seconds" | tee -a $out
      echo -e "  --> TEST FAILED\n" | tee -a $out 
  fi
fi


## final marks
echo -e "" >> $out
echo -e "Overall mark for CW 8 Core Part" | tee -a $out
echo -e "$marks" | tee -a $out