# Tests for src/gdal_vsi.cpp - VSI wrapper functions for virtual file systems

test_that("vsi_stat works", {
	data_dir <- system.file("extdata", package="gdalraster")
	expect_true(vsi_stat(data_dir))
	expect_equal(vsi_stat(data_dir, "type"), "dir")
	elev_file <- file.path(data_dir, "storml_elev.tif")
	expect_true(vsi_stat(elev_file))
	expect_equal(vsi_stat(elev_file, "type"), "file")
	expect_equal(vsi_stat(elev_file, "size"), 31152)
	nonexistent <- file.path(data_dir, "wrong_filename.tif")
	expect_false(vsi_stat(nonexistent))
	expect_equal(vsi_stat(nonexistent, "type"), "")
	expect_equal(vsi_stat(nonexistent, "size"), -1)
	expect_error(vsi_stat(elev_file, "invalid"))
})

test_that("vsi_read_dir works", {
	data_dir <- system.file("extdata", package="gdalraster")
	expect_type(vsi_read_dir(data_dir), "character")
})

test_that("vsi_copy_file works", {
	skip_if(as.integer(gdal_version()[2]) < 3070000)

	elev_file <- system.file("extdata/storml_elev.tif", package="gdalraster")
	tmp_file <- tempfile(fileext = ".tif")
	expect_equal(vsi_copy_file(elev_file, tmp_file), 0)
	expect_equal(vsi_unlink(tmp_file), 0)
})

test_that("vsi_unlink works", {
	elev_file <- system.file("extdata/storml_elev.tif", package="gdalraster")
	tmp_file <- paste0(tempdir(), "/", "tmp.tif")
	file.copy(elev_file, tmp_file)
	expect_equal(vsi_unlink(tmp_file), 0)
})

test_that("vsi_unlink_batch works", {
	skip_if(as.integer(gdal_version()[2]) < 3010000)
	
	elev_file <- system.file("extdata/storml_elev.tif", package="gdalraster")
	tcc_file <- system.file("extdata/storml_tcc.tif", package="gdalraster")
	tmp_elev <- paste0(tempdir(), "/", "tmp_elev.tif")
	file.copy(elev_file,  tmp_elev)
	tmp_tcc <- paste0(tempdir(), "/", "tmp_tcc.tif")
	file.copy(tcc_file,  tmp_tcc)
	expect_true(all(vsi_unlink_batch(c(tmp_elev, tmp_tcc))))
	expect_false(all(vsi_unlink_batch(c(tmp_elev, tmp_tcc))))
	expect_vector(vsi_unlink_batch(c(tmp_elev, tmp_tcc)), logical(), 2)
})

test_that("vsi_mkdir and vsi_rmdir work", {
	new_dir <- file.path(tempdir(), "newdir")
	expect_equal(vsi_mkdir(new_dir), 0)
	expect_equal(result <- vsi_rmdir(new_dir), 0)
})

test_that("vsi_sync works", {
	src_dir <- file.path(system.file("extdata", package="gdalraster"), "/")
	target_dir <- file.path(tempdir(), "syncdir")
	if (as.integer(gdal_version()[2]) < 3010000) {
		expect_true(vsi_sync(src_dir, target_dir))
	}
	else {
		opt <- "NUM_THREADS=1"
		expect_true(vsi_sync(src_dir, target_dir, options=opt))
	}
	expect_true(length(vsi_read_dir(target_dir)) > 1)
	lapply( vsi_read_dir(target_dir),
			function(f) {f <- file.path(target_dir, f); vsi_unlink(f)}
			)
	expect_equal(vsi_rmdir(target_dir), 0)
})

test_that("vsi_curl_clear_cache runs without error", {
	expect_no_error(vsi_curl_clear_cache())
	expect_no_error(vsi_curl_clear_cache(partial=TRUE, file_prefix="test"))
})

test_that("vsi_rename works", {
	elev_file <- system.file("extdata/storml_elev.tif", package="gdalraster")
	tmp_file <- tempfile(fileext = ".tif")
	file.copy(elev_file, tmp_file)
	new_file <- file.path(dirname(tmp_file), "storml_elev_copy.tif")
	expect_equal(vsi_rename(tmp_file, new_file), 0)
})