%global __brp_check_rpaths %{nil}
%global __requires_exclude ^libmpi
%global packname  LCCkNN
%global packver   0.1.0
%global rlibdir   /usr/local/lib/R/library

Name:             R-CRAN-%{packname}
Version:          0.1.0
Release:          1%{?dist}%{?buildtag}
Summary:          Adaptive k-Nearest Neighbor Classifier Based on Local Curvature Estimation

License:          MIT + file LICENSE
URL:              https://cran.r-project.org/package=%{packname}
Source0:          %{url}&version=%{packver}#/%{packname}_%{packver}.tar.gz


BuildRequires:    R-devel
Requires:         R-core
BuildArch:        noarch
BuildRequires:    R-CRAN-FNN 
BuildRequires:    R-CRAN-caret 
BuildRequires:    R-CRAN-MLmetrics 
BuildRequires:    R-stats 
BuildRequires:    R-CRAN-class 
Requires:         R-CRAN-FNN 
Requires:         R-CRAN-caret 
Requires:         R-CRAN-MLmetrics 
Requires:         R-stats 
Requires:         R-CRAN-class 

%description
Implements the kK-NN algorithm, an adaptive k-nearest neighbor classifier
that adjusts the neighborhood size based on local data curvature. The
method estimates local Gaussian curvature by approximating the shape
operator of the data manifold. This approach aims to improve
classification performance, particularly in datasets with limited samples.

%prep
%setup -q -c -n %{packname}

# fix end of executable files
find -type f -executable -exec grep -Iq . {} \; -exec sed -i -e '$a\' {} \;
# prevent binary stripping
[ -d %{packname}/src ] && find %{packname}/src -type f -exec \
  sed -i 's@/usr/bin/strip@/usr/bin/true@g' {} \; || true
[ -d %{packname}/src ] && find %{packname}/src/Make* -type f -exec \
  sed -i 's@-g0@@g' {} \; || true
# don't allow local prefix in executable scripts
find -type f -executable -exec sed -Ei 's@#!( )*/usr/local/bin@#!/usr/bin@g' {} \;

%build

%install

mkdir -p %{buildroot}%{rlibdir}
%{_bindir}/R CMD INSTALL -l %{buildroot}%{rlibdir} %{packname}
test -d %{packname}/src && (cd %{packname}/src; rm -f *.o *.so)
rm -f %{buildroot}%{rlibdir}/R.css
# remove buildroot from installed files
find %{buildroot}%{rlibdir} -type f -exec sed -i "s@%{buildroot}@@g" {} \;

%files
%{rlibdir}/%{packname}