#!/bin/bash

function print_help_and_exit() {
  cat <<EOF
Print paths to core parts of the repository
Usage: sparkd_path.sh SUBCOMMAND

Subcommands:
  build              Print build path
  repo-root          Print repo root path

EOF
  exit $1
}

function print_build_help_and_exit() {
  cat <<EOF
Print build path
Usage: sparkd_path.sh build [OPTIONS] compiler build-type

Positionals:
  gcc                Print gcc build path
  clang              Print clang build path
  debug              Print debug build path
  release            Print release build path

Options:
  --compiler         <clang|gcc> Specify the compiler
  --type             <debug|release> Specify the type of build 
  -h,--help          Print this help message and exit

EOF
  exit $1
}

function print_repo_root() {
  echo "$(cd "$(dirname "${BASH_SOURCE[0]}")/../" && pwd)"
}

function run_repo_root() {
  print_repo_root
}

function run_build() {
  compiler="gcc"
  build_type="release"
  while [[ $# -gt 0 ]]; do
    case "$1" in
    --compiler)
      compiler=$2
      shift 2
      ;;
    --type)
      build_type=$2
      shift 2
      ;;
    clang)
      compiler="clang"
      shift
      ;;
    gcc)
      compiler="gcc"
      shift
      ;;
    debug)
      build_type="debug"
      shift
      ;;
    release)
      build_type="release"
      shift
      ;;
    -f)
      force=1
      shift
      ;;
    --force)
      force=1
      shift
      ;;
    -h)
      print_build_help_and_exit 0
      ;;
    --help)
      print_build_help_and_exit 0
      ;;
    *)
      print_build_help_and_exit 1
      ;;
    esac
  done

  declare -A compilers=([gcc]="$(which gcc)" [clang]="$(which clang)")
  declare -A build_types=([debug]="debug" [release]="release")

  if [[ ${compilers[$compiler]+1} ]]; then
    comp_path=${compilers[$compiler]}
  else
    print_build_help_and_exit 1
  fi

  if [[ ${build_types[$build_type]+1} ]]; then
    build_type=${build_types[$build_type]}
  else
    print_build_help_and_exit 1
  fi

  src_root="$(print_repo_root)"
  build_root=$(readlink -f $src_root/build)
  build_dest="$build_root/$compiler/$build_type"

  echo $build_dest
}

if [[ $1 == "repot-root" ]]; then
  shift
  print_repo_root $@
elif [[ $1 == "build" ]]; then
  shift
  run_build $@
else
  print_help_and_exit 1
fi