#!/usr/bin/r -t
#                        Emacs make this -*- mode: R; tab-width: 4 -*-
#
# Copyright (C) 2010 - 2019  Romain Francois and Dirk Eddelbuettel
# Copyright (C) 2019         Dirk Eddelbuettel
#
# This file is part of RcppGSL.
#
# RcppGSL is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 2 of the License, or
# (at your option) any later version.
#
# RcppGSL is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with RcppGSL.  If not, see <http://www.gnu.org/licenses/>.

library(RcppGSL)

Rcpp::sourceCpp("cpp/gsl.cpp")

#test.gsl.vector.wrappers <- function(){
fx <- test_gsl_vector_wrapper
res <- fx()
expect_equal(res,
             list("gsl_vector" = numeric(10),
                  "gsl_vector_float" = numeric(10),
                  "gsl_vector_int" = integer(10),
                  ##"gsl_vector_long" = numeric(10),
                  "gsl_vector_char" = raw(10),
                  "gsl_vector_complex" = complex(10),
                  "gsl_vector_complex_float" = complex(10),
                  "gsl_vector_complex_long_double" = complex(10),
                  "gsl_vector_long_double" = numeric(10),
                  "gsl_vector_short" = integer(10),
                  "gsl_vector_uchar" = raw(10),
                  "gsl_vector_uint" = integer(10),
                  "gsl_vector_ushort" = integer(10)
                  ##,"gsl_vector_ulong" = numeric(10)
                  ),
             info = "wrap( gsl_vector )" )

#test.gsl.vector <- function(){
fx <- test_gsl_vector
res <- fx()
expect_equal(res,
             list("gsl_vector" = numeric(10),
                  "gsl_vector_float" = numeric(10),
                  "gsl_vector_int" = integer(10),
                  ##"gsl_vector_long" = numeric(10),
                  "gsl_vector_char" = raw(10),
                  "gsl_vector_complex" = complex(10),
                  "gsl_vector_complex_float" = complex(10),
                  "gsl_vector_complex_long_double" = complex(10),
                  "gsl_vector_long_double" = numeric(10),
                  "gsl_vector_short" = integer(10),
                  "gsl_vector_uchar" = raw(10),
                  "gsl_vector_uint" = integer(10),
                  "gsl_vector_ushort" = integer(10)
                  ##,"gsl_vector_ulong" = numeric(10)
                  ),
             info = "wrap( gsl_vector )" )


#test.gsl.matrix <- function(){
helper <- function(what){
    as.what <- get( paste( "as.", deparse(substitute(what)), sep = "" ) )
    x <- what(10)
    x[1] <- as.what(1)
    x[7] <- as.what(1)
    dim( x )  <- c(5,2)
    x
}
fx <- test_gsl_matrix
res <- fx()
expect_equal(res,
            list("gsl_matrix"                     = helper( numeric ),
                 "gsl_matrix_float"               = helper( numeric ),
                 "gsl_matrix_int"                 = helper( integer ),
                 ##"gsl_matrix_long"                = helper( numeric ),
                 "gsl_matrix_char"                = helper( raw ),
                 "gsl_matrix_complex"             = helper( complex ),
                 "gsl_matrix_complex_float"       = helper( complex ),
                 "gsl_matrix_complex_long_double" = helper( complex ),
                 "gsl_matrix_long_double"         = helper( numeric ),
                 "gsl_matrix_short"               = helper( integer ),
                 "gsl_matrix_uchar"               = helper( raw ),
                 "gsl_matrix_uint"                = helper( integer ),
                 "gsl_matrix_ushort"              = helper( integer )
                 ##,"gsl_matrix_ulong"               = helper( numeric )
                 ),
            info = "wrap( gsl_matrix )" )

# test.gsl.vector.view <- function(){
fx <- test_gsl_vector_view
res <- fx()
expect_equal(res,
             list( even = 2.0 * 0:4, odd = 2.0 * 0:4 + 1.0 ),
             info = "wrap( gsl.vector.view )" )

fx <- test_gsl_vector_view_wrapper
res <- fx()
expect_equal( res,
             list( even = 2.0 * 0:4, odd = 2.0 * 0:4 + 1.0 ),
             info = "wrap( gsl.vector.view.wrapper )" )

#test.gsl.matrix.view <- function(){
fx <- test_gsl_matrix_view
res <- fx()
expect_equal( res$full[3:4, 3:4], res$view, info = "wrap(gsl.matrix.view)" )

fx <- test_gsl_matrix_view_wrapper
res <- fx()
expect_equal( res$full[3:4, 3:4], res$view, info = "wrap(gsl.matrix.view.wrapper)" )

#test.gsl.vector.input.SEXP <- function(){
x <- rnorm( 10 )
fx <- test_gsl_vector_input
res <- fx(x)
expect_equal( res, sum(x), info = "RcppGSL::vector<double>(SEXP)" )

#test.gsl.matrix.input.SEXP <- function(){
x <- matrix( rnorm(20), nc = 4 )
fx <- test_gsl_matrix_input
res <- fx( x)
expect_equal( res, sum(x[,1]), info = "RcppGSL::matrix<double>(SEXP)" )

#test.gsl.RcppGSL.vector <- function(){
fx <- test_gsl_vector_conv
res <- fx()
expect_equal( res, 0:9, info = "RcppGSL::vector<int> -> IntegerVector" )

#test.gsl.RcppGSL.vector.indexing <- function(){
fx <- test_gsl_vector_indexing
res <- fx( seq(0.5, 10.5) )
expect_equal( res, seq( 1.5, 11.5 ) )

#test.gsl.RcppGSL.vector.iterating <- function(){
x   <-  seq(0.5, 10.5)
fx <- test_gsl_vector_iterating
res <- fx(x)
expect_equal( res, sum(x) )

#test.gsl.RcppGSL.vector.iterator.transform <- function() {
x   <-  seq(0.5, 10.5)
fx <- test_gsl_vector_iterator_transform
res <- fx(x)
expect_equal(res, sqrt(x))

#test.gsl.RcppGSL.matrix.indexing <- function(){
m   <- matrix( 1:16+.5, nr = 4 )
fx <- test_gsl_matrix_indexing
res <- fx(m)
expect_equal( res, m+1 )

#test.gsl.RcppGSL.vector.view.iterating <- function(){
x   <-  seq(1.5, 10.5)
fx <- test_gsl_vector_view_iterating
res <- fx(x)
expect_equal( res, sum( x[ seq(1, length(x), by = 2 ) ] ) )

#test.gsl.RcppGSL.matrix.view.indexing <- function(){
fx <- test_gsl_matrix_view_indexing
res <- fx()
expect_equal( res, 110.0 )