%global __brp_check_rpaths %{nil}
%global packname  TSLSTM
%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:          Long Short Term Memory (LSTM) Model for Time Series Forecasting

License:          GPL-3
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-keras 
BuildRequires:    R-CRAN-tensorflow 
BuildRequires:    R-CRAN-tsutils 
BuildRequires:    R-stats 
Requires:         R-CRAN-keras 
Requires:         R-CRAN-tensorflow 
Requires:         R-CRAN-tsutils 
Requires:         R-stats 

%description
The LSTM (Long Short-Term Memory) model is a Recurrent Neural Network
(RNN) based architecture that is widely used for time series forecasting.
Min-Max transformation has been used for data preparation. Here, we have
used one LSTM layer as a simple LSTM model and a Dense layer is used as
the output layer. Then, compile the model using the loss function,
optimizer and metrics. This package is based on Keras and TensorFlow
modules and the algorithm of Paul and Garai (2021)
<doi:10.1007/s00500-021-06087-4>.

%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}