# Copyright (C) 2013 - 2014  Dirk Eddelbuettel and Romain Francois
#
# This file is part of Rcpp.
#
# Rcpp 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.
#
# Rcpp 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 Rcpp.  If not, see <http://www.gnu.org/licenses/>.

.runThisTest <- Sys.getenv("RunAllRcppTests") == "yes"

if (.runThisTest) {

    test.exposeClass <- function(){

        tempdir <- tempdir()
        ## foo has already been loaded in test.Rcpp.package.skeleton.R,
        ## so named differently here to avoid namespace conflicts
        pkg_name <- "fooModule"
        path <- tempdir
        pkg_path <- file.path(path, pkg_name)
        R_path <- file.path(pkg_path, "R")
        src_path <- file.path(pkg_path, "src")
        foo_header <- "
#ifndef foo_h
#define foo_h 1
// class to set/get double
class foo {
 public:
  double x;
  double get_x() {return x;}
  void set_x(double _x) {x = _x; return;}
  foo(double _x) {set_x(_x);}
};
#endif
"

        ## create package
        Rcpp.package.skeleton(pkg_name, path=path, environment = environment(),
                              example_code = FALSE, module = TRUE)
        ## R 4.0.0 (currently in development) is stricter about the NAMESPACE and wants
        ##  - an actual function behind the export declaration we end up with here
        ##  - an export declaration for the class exposed and check below
        ## so we provide both to comply (and also no longer delete from src/ and R/)
        cat("Rcpp.fake.fun <- function() {}", file=file.path(path, pkg_name, "R", "fakefun.R"))
        cat("export(\"fooR\")", append=TRUE, file=file.path(path, pkg_name, "NAMESPACE"))

        on.exit(unlink(pkg_path, recursive=TRUE))
        cat(foo_header, file = file.path(src_path, "foo.h"))

        ## check that result of exposeClass compiles and runs properly
        exposeClass(class = "fooR",
                    constructors = list("double"),
                    fields = "x",
                    methods = c("get_x", "set_x"),
                    header = '#include "foo.h"',
                    CppClass = "foo",
                    rename = c(y = "x", get_y = "get_x", set_y = "set_x"),
                    file = file.path(src_path, "fooModule.cpp"),
                    Rfile = file.path(R_path, "fooClass.R"))
        compileAttributes(pkg_path)
        invisible(sapply( list.files( file.path(pkg_path, "man"), full.names=TRUE), unlink ))

        ## check build
        owd <- getwd()
        setwd(path)
        on.exit( setwd(owd), add=TRUE )
        R <- shQuote( file.path( R.home( component = "bin" ), "R" ))
        system( paste(R, "CMD build", pkg_path) )
        gz_name <- paste0(pkg_name, "_1.0.tar.gz")
        checkTrue( file.exists(gz_name), "can successfully R CMD build the pkg")

        ## check install + require
        dir.create("templib")
        install.packages(gz_name, file.path(path, "templib"), repos=NULL, type="source")
        on.exit( unlink( file.path(path, gz_name) ), add=TRUE)
        status <- require(pkg_name, file.path(path, "templib"), character.only=TRUE)
        on.exit( unlink( file.path(path, "templib"), recursive=TRUE), add=TRUE )
        checkTrue(status, "can successfully require the pkg")

        ## check object creation
        bar <- fooR(0)
        env <- environment()
        checkTrue( exists("bar", envir = env, inherits = FALSE),
                  "module object successfully instantiated" )
        gs <- replicate(n = 10, {
          y <- rnorm(1)
          bar$set_y(y)
          bar$get_y() - y
        })
        checkTrue( all(gs == 0), "renamed methods function as expected" )
        gs <- replicate(n = 10, {
          y <- rnorm(1)
          bar$set_y(y)
          bar$y - y
        })
        checkTrue( all(gs == 0), "renamed direct field functions as expected" )

    }

}