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

RC_FILE="${RC_FILE:-$HOME/.bashrc}"
DOTNET_DIR="${DOTNET_DIR:-$HOME/.dotnet}"

begin_marker="# >>> dotnet user-local env >>>"
end_marker="# <<< dotnet user-local env <<<"

block_content=$(cat <<EOF
${begin_marker}
export DOTNET_ROOT="${DOTNET_DIR}"
export PATH="\$DOTNET_ROOT:\$DOTNET_ROOT/tools:\$PATH"
${end_marker}
EOF
)

touch "${RC_FILE}"

# 幂等更新：如果已有块就删掉再写入
if grep -Fq "${begin_marker}" "${RC_FILE}"; then
  tmp="$(mktemp)"
  awk -v b="${begin_marker}" -v e="${end_marker}" '
    BEGIN{inblk=0}
    index($0,b){inblk=1; next}
    index($0,e){inblk=0; next}
    inblk==0{print}
  ' "${RC_FILE}" > "${tmp}"
  mv "${tmp}" "${RC_FILE}"
fi

{
  echo
  echo "${block_content}"
} >> "${RC_FILE}"

# ✅ 关键修复：不要依赖 source ~/.bashrc（非交互可能直接 return）
# 直接在当前脚本进程里让环境变量生效
export DOTNET_ROOT="${DOTNET_DIR}"
export PATH="${DOTNET_ROOT}:${DOTNET_ROOT}/tools:${PATH}"

echo "== DOTNET_ROOT =="
echo "${DOTNET_ROOT}"
echo
echo "== which dotnet =="
command -v dotnet || true
echo

# 检测 dotnet 是否实际安装在 ~/.dotnet
if [[ ! -x "${DOTNET_ROOT}/dotnet" ]] && ! command -v dotnet >/dev/null 2>&1; then
  echo "ERROR: dotnet 仍然不可用。"
  echo "原因通常是：${DOTNET_ROOT}/dotnet 不存在（还没安装 .NET SDK/Runtime）"
  echo
  echo "你可以检查："
  echo "  ls -lh ${DOTNET_ROOT}"
  echo
  echo "如果你本来是装在别的目录（例如 /usr/share/dotnet），就把 DOTNET_DIR 改成那个路径："
  echo "  DOTNET_DIR=/usr/share/dotnet ./setup_dotnet_env.sh"
  exit 2
fi

echo "== dotnet --info =="
dotnet --info
echo
echo "Done. Persistent config written to: ${RC_FILE}"