#!/bin/zsh

desired_build_file=${1:-all}
desired_format=${2:-pdf}
built_in_all="all"

build_base_command() {
  local command_builder=""
  local file_name=$1
  local file_type=$2
	local file_path="$PWD/src/$file_name.chordpro"
	local revision=""
	local xc="roman"

	local x_vars=$(sed -n "s/^{\(x_.\+:.\+\)}.*/\1/p" $file_path | sed "s/:/=/")

  command_builder+=" chordpro"
  command_builder+=" --transcode=$xc"
  command_builder+=" --config=$PWD/config.json"

  if [[ -f "$PWD/configs/$file_name.json" ]] ; then
    command_builder+=" --config=$PWD/configs/$file_name.json"
  fi

	if [ -z "" ]; then
		while IFS= read -r line; do
			if [[ "$line" == "x_revision"* ]]; then
				revision=$(echo $line | cut -d'=' -f2)
			fi
			command_builder+=" --meta $line"
		done <<< "$x_vars"
	fi

  command_builder+=" -o $PWD/out/$file_name.v$revision.$xc.$file_type"

  command_builder+=" $file_path"

  echo ""
  echo "Starting $file_name"
  echo ""
  echo $command_builder
  echo ""
  eval ${command_builder}
}

render_all() {
  for file in $PWD/src/**/*(.); do
		build_base_command $file:t:r $desired_format:l &;
	done
}

echo "Interpreted as request to build '${desired_build_file:l}' as '${desired_format:l}'"
if [[ $desired_build_file:l == $built_in_all:l ]] ; then
  render_all
else
  build_base_command $desired_build_file:l $desired_format:l
fi