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

# migration/migrate_module.sh
# Usage: ./migration/migrate_module.sh <module-path> [--jobs N]
# Runs a reproducible configure/build/test of the specified module inside the app docker
# Note: Source directory is qt-migration-legatus/qt6-after/qt6-migrated-legatus/ (submodule)

MODULE_PATH=${1:-}
if [[ -z "$MODULE_PATH" ]]; then
  echo "Usage: $0 <module-path> [--jobs N]"
  exit 1
fi

JOBS=4
shift || true
while [[ $# -gt 0 ]]; do
  case "$1" in
    --jobs) JOBS="$2"; shift 2;;
    -j*) JOBS="${1#-j}"; shift;;
    *) echo "Unknown arg: $1"; exit 1;;
  esac
done

# Submodule path containing the migrated Qt6 code
SUBMODULE_PATH="qt-migration-legatus/qt6-after/qt6-migrated-legatus"

# Ensure path is relative to repo root and compute absolute module path inside container
REPO_DIR="$(pwd)"
MODULE_ABS="/repo/${SUBMODULE_PATH}/$(realpath --relative-to="$REPO_DIR/${SUBMODULE_PATH}" "$MODULE_PATH" 2>/dev/null || echo "$MODULE_PATH")"

# Use app/run_docker.sh to run the migration inside the prepared Qt6 image
# The container will configure just the requested module in a clean build directory.

# Try using app/run_docker.sh; if it fails, fall back to direct docker run using the built image.
# Use a dedicated build dir per-module to avoid permission issues on /repo/build created by earlier runs.
SANITIZED_MODULE_NAME=$(echo "${MODULE_PATH}" | sed -e 's#/#_#g' -e 's/[^A-Za-z0-9_.-]/_/g')
BUILD_DIR="/repo/build_migrate_${SANITIZED_MODULE_NAME}"

if ./app/run_docker.sh "$REPO_DIR" -- bash -lc \
  "set -euo pipefail && export LD_LIBRARY_PATH=/opt/Qt/6.10.2/gcc_64/lib:\${LD_LIBRARY_PATH:-} && export QT_QPA_PLATFORM=offscreen && rm -rf ${BUILD_DIR} && mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR} && \ 
    cmake -S /repo/${SUBMODULE_PATH} -B ${BUILD_DIR} -G Ninja -DCMAKE_PREFIX_PATH=/opt/Qt/6.10.2/gcc_64 -DCMAKE_CXX_STANDARD=23 -DMIGRATE_MODULE=${MODULE_PATH} -DBUILD_TESTING=ON && \ 
    cmake --build ${BUILD_DIR} -- -j${JOBS} && ctest --test-dir ${BUILD_DIR} --output-on-failure"; then
  echo "Migration run for module ${MODULE_PATH} finished via run_docker.sh. Check ${BUILD_DIR} for logs and artifacts."
else
  echo "run_docker.sh failed or did not forward command args correctly; falling back to direct docker run"
  # Build image (cached by Dockerfile in app/)
  docker build -t migration-pipeline:ubuntu26.04 ./app >/dev/null || true
  docker run --rm --user "$(id -u):$(id -g)" -v "$REPO_DIR":/repo -w /repo -e CMAKE_PREFIX_PATH=/opt/Qt/6.10.2/gcc_64 -e Qt6_ROOT=/opt/Qt/6.10.2/gcc_64 -e QT_QPA_PLATFORM=offscreen migration-pipeline:ubuntu26.04 bash -lc "set -euo pipefail && export LD_LIBRARY_PATH=/opt/Qt/6.10.2/gcc_64/lib:\${LD_LIBRARY_PATH:-} && rm -rf ${BUILD_DIR} && mkdir -p ${BUILD_DIR} && cd ${BUILD_DIR} && cmake -S /repo/${SUBMODULE_PATH} -B ${BUILD_DIR} -G Ninja -DCMAKE_PREFIX_PATH=/opt/Qt/6.10.2/gcc_64 -DCMAKE_CXX_STANDARD=23 -DMIGRATE_MODULE=${MODULE_PATH} -DBUILD_TESTING=ON && cmake --build ${BUILD_DIR} -- -j${JOBS} && ctest --test-dir ${BUILD_DIR} --output-on-failure"
  echo "Migration run for module ${MODULE_PATH} finished via direct docker run. Check ${BUILD_DIR} for logs and artifacts."
fi

echo "Migration run for module ${MODULE_PATH} finished. Check ./build for logs and artifacts."