#!/bin/bash
#/ Usage: script/generate-example fileA fileB
#/        script/generate-example directory
#/
#/ Generate expected output for a test fixture example or directory of examples.
#/
#/ Example:
#/  script/generate-example test/fixtures/ruby/and-or.{A,B}.rb
#/  script/generate-example test/fixtures/ruby

set -e
[ $# -eq 0 ] && set -- --help

if [[ $1 = -h || $1 = --help ]]; then
  grep ^#/ <"$0" |cut -c4-
  exit
fi

# Work out of the project root directory
root=$(cd $(dirname "$0")/.. && pwd)
cd "$root"

count=0
status () {
  tput cuu 1 && tput el
  echo "Generating $1"
  ((count+=1))
}

generate_example () {
  fileA="$1"
  fileB="$2"
  parseFileA="${fileA%%.*}.parseA.txt"
  parseFileB="${fileB%%.*}.parseB.txt"
  diffFileAddA="${fileA%%.*}.diff+A.txt"
  diffFileRemoveA="${fileA%%.*}.diff-A.txt"
  diffFileAddB="${fileB%%.*}.diff+B.txt"
  diffFileRemoveB="${fileB%%.*}.diff-B.txt"
  diffFileAB="${fileA%%.*}.diffA-B.txt"
  diffFileBA="${fileB%%.*}.diffB-A.txt"

  status $parseFileA
  stack exec semantic-diff -- --sexpression --parse $fileA > $parseFileA

  status $parseFileB
  stack exec semantic-diff -- --sexpression --parse $fileB > $parseFileB

  status $diffFileAddA
  stack exec semantic-diff -- --sexpression --no-index /dev/null $fileA > $diffFileAddA

  status $diffFileRemoveA
  stack exec semantic-diff -- --sexpression --no-index $fileA /dev/null > $diffFileRemoveA

  status $diffFileAddB
  stack exec semantic-diff -- --sexpression --no-index /dev/null $fileB > $diffFileAddB

  status $diffFileRemoveB
  stack exec semantic-diff -- --sexpression --no-index $fileB /dev/null > $diffFileRemoveB

  status $diffFileAB
  stack exec semantic-diff -- --sexpression --no-index $fileA $fileB > $diffFileAB

  status $diffFileBA
  stack exec semantic-diff -- --sexpression --no-index $fileB $fileA > $diffFileBA
}

if [[ -d $1 ]]; then
  echo "Generating all examples for $1"
  echo ""
  for f in $(ls $1/*.A.*); do
    # echo "${f%%.*}.B."${f##*.}""
    generate_example $f "${f%%.*}.B."${f##*.}""
  done
else
  echo "Generating examples just for $1 $2"
  echo ""
  generate_example $1 $2
fi

echo "Done. Generated $count examples."