#!/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="${fileB%%.*}.parseB.txt"
  diffFileAB="${fileA%%.*}.diffA-B.txt"
  diffFileBA="${fileB%%.*}.diffB-A.txt"

  if [ -e "$fileA" ]; then
    status $parseFileA
    stack exec semantic -- parse --sexpression $fileA > $parseFileA
  fi

  if [ -e "$fileB" ]; then
    status $parseFileB
    stack exec semantic -- parse --sexpression $fileB > $parseFileB
  fi

  if [ -e "$fileA" -a -e "$fileB" ]; then
    status $diffFileAB
    stack exec semantic -- diff --sexpression $fileA $fileB > $diffFileAB

    status $diffFileBA
    stack exec semantic -- diff --sexpression $fileB $fileA > $diffFileBA
  fi
}

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."