#!/usr/bin/env bash
# CLI launcher for module regression tests.
# Symlinked from <module>/test/regression.
# Usage: ./regression [ctest args...]
#   ./regression                       run all tests for this module
#   ./regression -R search_timing      run matching test
#   ./regression -R search_timing.tcl  .tcl suffix is stripped automatically
#
# Modeled after OpenROAD/test/shared/regression.sh

set -e

# Determine module name from current directory.
script_path=$(realpath "$PWD")
sta_home=$(cd "$(dirname "$(realpath "$0")")/.." && pwd)
module=${script_path#${sta_home}/}
module=${module%%/*}

# Find build directory.
if [ -d "${sta_home}/build" ]; then
  build_dir="${sta_home}/build"
else
  echo "Error: no build directory found (tried build)"
  exit 1
fi

# Rewrite -R argument: strip .tcl suffix, convert _ to . for ctest name matching.
args=()
next_is_pattern=false
for arg in "$@"; do
  if $next_is_pattern; then
    arg="${arg%.tcl}"
    arg="${arg//_/.}"
    next_is_pattern=false
  fi
  if [ "$arg" = "-R" ]; then
    next_is_pattern=true
  fi
  args+=("$arg")
done

cd "${build_dir}"

# Default to parallel execution using all cores.
if [[ "$OSTYPE" == "linux-gnu"* ]]; then
  numThreads=$(nproc --all)
elif [[ "$OSTYPE" == "darwin"* ]]; then
  numThreads=$(sysctl -n hw.ncpu)
else
  numThreads=2
fi

# Top-level test/ directory or project root: run all tests.
# Module directory (e.g. dcalc/test): run only that module's tests.
if [ "$module" = "test" ] || [ -z "$module" ]; then
  ctest -j "${numThreads}" "${args[@]}"
else
  ctest -j "${numThreads}" -L "module_${module}" "${args[@]}"
fi