#!/usr/bin/env bash
set -uo pipefail

panic() {
  echo "panic: $*" >&2
  exit 1
}

if [ -z "${DCTLENV_ROOT:-""}" ]; then
  # http://stackoverflow.com/questions/1055671/how-can-i-get-the-behavior-of-gnus-readlink-f-on-a-mac
  readlink_f() {
    local target_file="$1"
    local file_name

    while [ "$target_file" != "" ]; do
      cd "$(dirname $target_file)"
      file_name="$(basename "$target_file")"
      target_file="$(readlink "$file_name")"
    done

    echo "$(pwd -P)/$file_name"
  }

  DCTLENV_ROOT="$(cd "$(dirname "$(readlink_f "$0")")/.." && pwd)"
  [ -n $DCTLENV_ROOT ] || panic "Failed to set DCTLENV_ROOT"
else
  DCTLENV_ROOT="${DCTLENV_ROOT%/}"
fi
export DCTLENV_ROOT

if source "$DCTLENV_ROOT/lib/utils.sh"; then
  log_debug "Utils from $DCTLENV_ROOT/lib/utils.sh sourced successfully"
else
  panic "Failed to source utils from $DCTLENV_ROOT/lib/utils.sh"
fi

for dir in libexec bin; do
  case ":$PATH:" in
    *:$DCTLENV_ROOT/$dir:*)
      log_debug "\$PATH already contains '$DCTLENV_ROOT/$dir'"
      ;;
    *)
      log_debug "Adding '$DCTLENV_ROOT/$dir' to \$PATH"
      export PATH="$DCTLENV_ROOT/$dir:$PATH"
      ;;
  esac
done

driftctl_path="$DCTLENV_ROOT/bin/driftctl"

exec dctlenv-exec "$@" || log_error "Failed to exec: \"$driftctl_path\" \"$@\""