%global __brp_check_rpaths %{nil}
%global packname  WaveletRF
%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:          Wavelet-RF Hybrid 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-stats 
BuildRequires:    R-CRAN-wavelets 
BuildRequires:    R-CRAN-fracdiff 
BuildRequires:    R-CRAN-forecast 
BuildRequires:    R-CRAN-randomForest 
BuildRequires:    R-CRAN-tsutils 
Requires:         R-stats 
Requires:         R-CRAN-wavelets 
Requires:         R-CRAN-fracdiff 
Requires:         R-CRAN-forecast 
Requires:         R-CRAN-randomForest 
Requires:         R-CRAN-tsutils 

%description
The Wavelet Decomposition followed by Random Forest Regression (RF) models
have been applied for time series forecasting. The maximum overlap
discrete wavelet transform (MODWT) algorithm was chosen as it works for
any length of the series. The series is first divided into training and
testing sets. In each of the wavelet decomposed series, the supervised
machine learning approach namely random forest was employed to train the
model. This package also provides accuracy metrics in the form of Root
Mean Square Error (RMSE) and Mean Absolute Prediction Error (MAPE). This
package is based on the algorithm of Ding et al. (2021) <DOI:
10.1007/s11356-020-12298-3>.

%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}