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

# automate_migrate_Lts_DDS.sh
# Run inside migration Docker image (migration-pipeline:ubuntu26.04)
# - Installs lightweight tooling (clang-tidy, clang-format, pip)
# - Runs clang-tidy fixes (safe checks) over Lts/DDS
# - Runs strix to generate tests for modified functions (if strix available)
# - Commits changes incrementally

REPO_DIR="/repo"
MODULE="Lts/DDS"
BUILD_DIR="/repo/build_migrate_Lts_DDS"

echo "This script must run inside the migration image with network access. It will attempt to install tools and
apply automated clang-tidy fixes. Review changes before pushing."

apt-get update
apt-get install -y --no-install-recommends clang-tidy clang-format python3-pip git || true

# Install strix via pip if available (strix has a pip package 'strix' — fallback: clone usestrix/strix)
if ! python3 -m pip show strix >/dev/null 2>&1; then
  pip install --upgrade pip setuptools || true
  if python3 -m pip install strix; then
    echo "Installed strix via pip"
  else
    echo "strix pip install failed; cloning repository as fallback"
    TMP=$(mktemp -d)
    git clone --depth 1 https://github.com/usestrix/strix.git "$TMP" || true
    if [ -d "$TMP" ]; then
      pip install --upgrade "$TMP" || true
    fi
  fi
fi

# Run clang-tidy fixes (safe subset)
# NOTE: This uses compile_commands from the build dir. Ensure build_migrate_Lts_DDS has been configured.
if [ ! -f "${BUILD_DIR}/compile_commands.json" ]; then
  echo "Configuring build dir to generate compile_commands.json"
  mkdir -p "${BUILD_DIR}"
  cd "${BUILD_DIR}"
  cmake -S "${REPO_DIR}" -B "${BUILD_DIR}" -G Ninja -DCMAKE_PREFIX_PATH=/opt/Qt/6.8.3/gcc_64:/usr/local -DCMAKE_CXX_STANDARD=20 -DMIGRATE_MODULE=${MODULE} -DBUILD_TESTING=OFF
  cd "${REPO_DIR}"
fi

# Safe checks: modernize-use-nullptr, modernize-loop-convert, readability-identifier-naming (no-apply)
CHECKS="-checks=modernize-*,-modernize-use-trailing-return-type,-modernize-raw-string-literal" 

# Run clang-tidy and auto-fix per file
FILES=$(git ls-files "${MODULE}" | grep -E "\.(cpp|cc|cxx|h|hpp)$" || true)
for f in $FILES; do
  echo "Running clang-tidy on $f"
  clang-tidy $f -p "${BUILD_DIR}" ${CHECKS} --format-style=file -fix -quiet || true
done

# Format changed files
for f in $FILES; do
  git ls-files -m | grep -q "^$f$" && clang-format -i "$f" || true
done

# Commit changes if any
if [ -n "$(git status --porcelain)" ]; then
  git add ${MODULE}
  git commit -m "migrate(Lts/DDS): apply clang-tidy modernization fixes\n\nCo-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>" || true
  echo "Committed automated clang-tidy fixes for ${MODULE}"
else
  echo "No changes from clang-tidy"
fi

# Attempt to run strix to produce tests (best-effort). Honor SKIP_STRIX=1 to skip.
if [ "${SKIP_STRIX:-0}" = "1" ]; then
  echo "SKIP_STRIX=1 set; skipping strix test generation"
else
  if python3 -m strix --help >/dev/null 2>&1; then
    echo "Running strix to generate tests (best-effort)"
    # Example invocation: strix --target <binary> --out tests/
    mkdir -p migration/strix-tests
    # This is a placeholder; actual strix usage depends on build artifacts and symbols
    echo "Stripe test generation placeholder: run strix manually against built binaries."
  else
    echo "strix not available; skipping test generation"
  fi
fi

echo "Automated migration script finished. Review git status and run full builds."