#!/bin/zsh

# to make the script fail safely

set -euo pipefail

out=${1:-output}

echo "" > $out

echo -e `date` >> $out

echo -e  "" >> $out

echo -e  "Below is the feedback and provisional marks for your submission" >> $out

echo -e  "of the Main Part 2 (Scala).  Please note all marks are provisional until" >> $out

echo -e  "ratified by the assessment board -- this is not an official" >> $out

echo -e  "results transcript." >> $out

echo -e  "" >> $out

# marks for core CW7

marks=$(( 0.0 ))

# compilation tests

function scala_compile {

  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -Xprint:parser "$1" 2> c$out 1> c$out)

}

# functional tests

function scala_assert {

  (ulimit -t 30; JAVA_OPTS="-Xmx1g" scala -i "$1" -- "$2" -e "" 2> /dev/null 1> /dev/null)

}

function scala_assert_thirty {

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

}

# purity test

function scala_vars {

   (sed 's/immutable/ok/g' c$out > cb$out;

    egrep '\bvar\b|\breturn\b|\.par\.|\.par |ListBuffer|AtomicInteger|mutable|util.control|new Array' cb$out 2> /dev/null 1> /dev/null)

}

echo -e "" >> $out

echo -e  "Below is the feedback for your submission danube.scala" >> $out

echo -e  "" >> $out

### compilation test

echo -e  "danube.scala runs?" | tee -a $out

if (scala_compile danube.scala)

then

    echo -e  "  --> success" | tee -a $out

    tsts=$(( 0 ))

else

    echo -e  "  --> SCALA DID NOT RUN danube.scala" | tee -a $out

    tsts=$(( 1 )) 

fi

# var, .par return, ListBuffer test

#

if [ $tsts -eq 0 ]

then 

      echo -e  "danube.scala does not contain VARS, RETURNS etc?" | tee -a $out

      if (scala_vars danube.scala)

      then

	  echo -e  "  --> TEST FAILED\n" | tee -a $out

	  tsts=$(( 1 ))  

      else

	  echo -e  "  --> success" | tee -a $out

	  tsts=$(( 0 )) 

      fi

else

    tsts=$(( 1 ))  

fi

### danube get_cvs_url tests

if [ $tsts -eq 0 ]

then

  echo -e  "danube.scala tests:" | tee -a $out

  echo -e  "  val movies_url = \"\"\"https://nms.kcl.ac.uk/christian.urban/movies.csv\"\"\"" | tee -a $out

  echo -e  "  get_csv_url(movies_url).length == 9742" | tee -a $out

  if (scala_assert "danube.scala" "danube_test1.scala")

  then

      echo -e  "  --> success" | tee -a $out

      marks=$(( marks + 1.0 ))

  else

      echo -e  "  --> TEST FAILED\n" | tee -a $out

  fi

fi

### danube processing tests

if [ $tsts -eq 0 ]

then

  echo -e  "  val good_ratings = process_ratings(ratings)" | tee -a $out

  echo -e  "  val movie_names = process_movies(movies)" | tee -a $out  

  echo -e  "  " | tee -a $out

  echo -e  "  good_ratings.length == 48580 " | tee -a $out

  echo -e  "  movie_names.length == 9742 " | tee -a $out

  echo -e  "  "  | tee -a $out

  echo -e  "  val r_elems = List((\"1\",\"1\"), (\"1\",\"3\"), (\"1\",\"6\"), (\"1\",\"47\")) " | tee -a $out

  echo -e  "  r_elems.forall(good_ratings.contains(_)) == true" | tee -a $out

  if (scala_assert "danube.scala" "danube_test2.scala") 

  then

      echo -e  "  --> success" | tee -a $out

      marks=$(( marks + 1.0 ))

  else

      echo -e  "  --> ONE OF THE TESTS FAILED\n" | tee -a $out

  fi

fi

### danube groupById test

if [ $tsts -eq 0 ]

then

  echo -e  "  val ls1 = List((\"1\", \"a\"), (\"2\", \"a\"), (\"1\", \"c\"), (\"2\", \"a\"), (\"1\", \"c\"))" | tee -a $out

  echo -e  "  val ls2 = List((\"1\", \"a\"), (\"1\", \"b\"), (\"2\", \"x\"), (\"3\", \"a\"), (\"2\", \"y\"), (\"3\", \"c\"))" | tee -a $out

  echo -e  "  groupById(ls1, Map()) == Map(1 -> List(c, c, a), 2 -> List(a, a))" | tee -a $out

  echo -e  "  groupById(ls2, Map()) == Map(1 -> List(b, a), 2 -> List(x, y), 3 -> List(c, a))" | tee -a $out

  echo -e  "      where the order in the lists is unimportant" | tee -a $out

  echo -e  "  val ls3 = (11 to 1000 by 5).map(_.toString).toList" | tee -a $out

  echo -e  "  val ls4 = ls3 zip ls3.tail" | tee -a $out

  echo -e  "  val ls5 = ls4 ::: ls4.reverse" | tee -a $out

  echo -e  "  groupById(ls5, Map()) == Map(11 -> List(16,16), 16 -> List(21,21), ....)" | tee -a $out

  if (scala_assert "danube.scala" "danube_test3.scala")

  then

      echo -e  -e "  --> success" | tee -a $out

      marks=$(( marks + 1.0 ))

  else

      echo -e  -e "  --> ONE OF THE TESTS FAILED\n" | tee -a $out

  fi

fi

### danube favourites tests

if [ $tsts -eq 0 ]

then

  echo -e  "  val good_ratings = process_ratings(ratings)" | tee -a $out

  echo -e  "  val ratings_map = groupById(good_ratings, Map())" | tee -a $out

  echo -e  "  favourites(ratings_map, \"912\").length  == 80 " | tee -a $out

  echo -e  "  favourites(ratings_map, \"858\").length  == 158 " | tee -a $out

  echo -e  "  favourites(ratings_map, \"260\").length  == 201 " | tee -a $out  

  if (scala_assert "danube.scala" "danube_test4.scala") 

  then

    echo -e  "  --> success" | tee -a $out

    marks=$(( marks + 1.0 ))

  else

    echo -e  "  --> ONE OF THE TESTS FAILED\n" | tee -a $out

  fi

fi

### danube suggestions tests

if [ $tsts -eq 0 ]

then

  echo -e  "  val good_ratings = process_ratings(ratings)" | tee -a $out

  echo -e  "  val ratings_map = groupById(good_ratings, Map())" | tee -a $out

  echo -e  "  suggestions(ratings_map, \"912\").length  == 4110 " | tee -a $out

  echo -e  "  suggestions(ratings_map, \"858\").length  == 4883 " | tee -a $out

  echo -e  "  suggestions(ratings_map, \"260\").length  == 4970 " | tee -a $out  

  if (scala_assert "danube.scala" "danube_test5.scala") 

  then

    echo -e  "  --> success" | tee -a $out

    marks=$(( marks + 1.0 ))

  else

    echo -e  "  --> ONE OF THE TESTS FAILED\n" | tee -a $out

  fi

fi

### danube recommendation tests

if [ $tsts -eq 0 ]

then

  echo -e  "  recommendations(ratings_map, movies_map, \"1\").length  == 2 " | tee -a $out

  echo -e  "  recommendations(ratings_map, movies_map, \"2\").length  == 2 " | tee -a $out

  echo -e  "  recommendations(ratings_map, movies_map, \"3\").length  == 2 " | tee -a $out

  echo -e  "  recommendations(ratings_map, movies_map, \"4\").length  == 0 " | tee -a $out

  echo -e  "  recommendations(ratings_map, movies_map, \"5\").length  == 2 " | tee -a $out

  if (scala_assert "danube.scala" "danube_test6.scala") 

  then

    echo -e  "  --> success" | tee -a $out

    marks=$(( marks + 1.0 ))

  else

    echo -e  "  --> ONE OF THE TESTS FAILED\n" | tee -a $out

  fi

fi

## final marks

echo -e "Overall mark for Main Part 2 (Scala)" | tee -a $out

printf " %0.1f\n" $marks | tee -a $out