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

# install_bgviewer.sh
# Extract or copy a BgViewer/dtEntity vendor archive or directory into ./external/BgViewer
# Usage: ./install_bgviewer.sh /path/to/bgviewer.tar.gz_or_dir [target_dir]

SRC="$1"
TARGET_DIR="${2:-./external/BgViewer}"

if [[ -z "$SRC" ]]; then
  echo "Usage: $0 /path/to/bgviewer.tar.gz_or_dir [target_dir]"
  exit 1
fi

# Create target dir (prefer non-root)
if ! mkdir -p "$TARGET_DIR" 2>/dev/null; then
  sudo mkdir -p "$TARGET_DIR"
fi
if ! chown $(id -u):$(id -g) "$TARGET_DIR" 2>/dev/null; then
  sudo chown $(id -u):$(id -g) "$TARGET_DIR" || true
fi

if [[ -d "$SRC" ]]; then
  echo "Copying BgViewer directory $SRC -> $TARGET_DIR"
  rsync -a --delete "$SRC/" "$TARGET_DIR/"
elif [[ -f "$SRC" ]]; then
  echo "Extracting archive $SRC -> $TARGET_DIR"
  case "$SRC" in
    *.tar.gz|*.tgz) tar xzf "$SRC" -C "$TARGET_DIR" --strip-components=1 ;;
    *.tar.bz2) tar xjf "$SRC" -C "$TARGET_DIR" --strip-components=1 ;;
    *.zip) unzip -q "$SRC" -d "$TARGET_DIR" ;;
    *) echo "Unknown archive format: $SRC"; exit 1 ;;
  esac
else
  echo "Source $SRC not found" >&2
  exit 1
fi

echo "BgViewer installed to $TARGET_DIR"
echo "You may set -DBGVIEWER_DIR=$TARGET_DIR or ensure CMAKE_PREFIX_PATH includes $TARGET_DIR when configuring CMake."