#!/bin/bash -e
#
# Copyright 2017-present The Material Motion and Material Components for
# iOS Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

HELPFILE="$1"
if [ ! -f "$HELPFILE" ]; then
  echo "No help for $parentcmd $1 found."
  exit 1
fi

if [ -t 1 ] ; then # We're writing directly to terminal
  readonly B=$(tput bold)
  readonly U=$(tput smul)
  readonly N=$(tput sgr0)
else # We're in a pipe
  readonly B=""
  readonly U=""
  readonly N=""
fi

echo
# Underline content between <> marks
sed -e "s:\(<\([a-zA-Z0-9 /]*\)>\):${N}${U}\2${N}:g" "$HELPFILE" | \
  # Bold content between `` marks
  perl -pe "s:(\`(.+?)\`):${B}\2${N}:g" | \
  # Indent code blocks by two
  sed -e "s/^    /      /" | \
  # Bold markdown headers
  perl -pe "s/^#+ (.+)/${B}\1${N}/g" | \
  # Strip "Usage:"
  sed -e "s/^Usage: //" | \
  # Indent all paragraphs
  perl -pe "s:^(\S.+):    \1:g"
echo