#############################################################################
#
# XLConnect
# Copyright (C) 2010-2021 Mirai Solutions GmbH
#
# This program 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 3 of the License, or
# (at your option) any later version.
#
# This program 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 this program.  If not, see <https://www.gnu.org/licenses/>.
#
#############################################################################

#############################################################################
#
# Tests for checking equality of data.frame's being written to and read
# from Excel worksheets
#
# Author: Martin Studer, Mirai Solutions GmbH
# Author: Thomas Themel, Mirai Solutions GmbH
#
#############################################################################

test.writeWorksheetToFile <- function() {

	# Create workbooks
        file.xls <- "testWriteWorksheetToFileWorkbook.xls"
        file.xlsx <- "testWriteWorksheetToFileWorkbook.xlsx"

        if(file.exists(file.xls)) {
          file.remove(file.xls)
        }

        if(file.exists(file.xlsx)) {
          file.remove(file.xlsx)
        }

	testDataFrame <- function(file, df) {
		worksheet <- deparse(substitute(df))
                print(paste("Writing dataset ", worksheet, "to file", file))
                name <- paste(worksheet, "Region", sep="")
		writeWorksheetToFile(file, data=df, sheet=name)
		res <- readWorksheetFromFile(file, sheet=name)
                checkEquals(normalizeDataframe(df), res, check.attributes = FALSE, check.names = TRUE)
        }

	if(getOption("FULL.TEST.SUITE")) {
		# built-in dataset mtcars (*.xls)
		testDataFrame(file.xls, mtcars)
		# built-in dataset mtcars (*.xlsx)
		testDataFrame(file.xlsx, mtcars)

		# built-in dataset airquality (*.xls)
		testDataFrame(file.xls, airquality)
		# built-in dataset airquality (*.xlsx)
		testDataFrame(file.xlsx, airquality)

		# built-in dataset attenu (*.xls)
		testDataFrame(file.xls, attenu)
		# built-in dataset attenu (*.xlsx)
		testDataFrame(file.xlsx, attenu)

		# built-in dataset ChickWeight (*.xls)
		testDataFrame(file.xls, ChickWeight)
		# built-in dataset ChickWeight (*.xlsx)
		testDataFrame(file.xlsx, ChickWeight)

		CO = CO2 # CO2 seems to be an illegal name
		# built-in dataset CO2 (*.xls)
		testDataFrame(file.xls, CO2)
		# built-in dataset CO2 (*.xlsx)
		testDataFrame(file.xlsx, CO2)

		# built-in dataset iris (*.xls)
		testDataFrame(file.xls, iris)
		# built-in dataset iris (*.xlsx)
		testDataFrame(file.xlsx, iris)

		# built-in dataset longley (*.xls)
		testDataFrame(file.xls, longley)
		# built-in dataset longley (*.xlsx)
		testDataFrame(file.xlsx, longley)

		# built-in dataset morley (*.xls)
		testDataFrame(file.xls, morley)
		# built-in dataset morley (*.xlsx)
		testDataFrame(file.xlsx, morley)

		# built-in dataset swiss (*.xls)
		testDataFrame(file.xls, swiss)
		# built-in dataset swiss (*.xlsx)
		testDataFrame(file.xlsx, swiss)
	}

	# custom test dataset
	cdf <- data.frame(
			"Column.A" = c(1, 2, 3, NA, 5, 6, 7, 8, NA, 10),
			"Column.B" = c(-4, -3, NA, -1, 0, NA, NA, 3, 4, 5),
			"Column.C" = c("Anna", "???", NA, "", NA, "$!?&%", "(?2@?~?'^*#|)", "{}[]:,;-_<>", "\\sadf\n\nv", "a b c"),
			"Column.D" = c(pi, -pi, NA, sqrt(2), sqrt(0.3), -sqrt(pi), exp(1), log(2), sin(2), -tan(2)),
			"Column.E" = c(TRUE, TRUE, NA, NA, FALSE, FALSE, TRUE, NA, FALSE, TRUE),
			"Column.F" = c("High", "Medium", "Low", "Low", "Low", NA, NA, "Medium", "High", "High"),
			"Column.G" = c("High", "Medium", NA, "Low", "Low", "Medium", NA, "Medium", "High", "High"),
			"Column.H" = rep(c(as.Date("2021-10-30") , as.Date("2021-03-28"), NA), length = 10),
			# NOTE: Column.I is automatically converted to POSIXct!!!
			"Column.I" = rep(c(as.POSIXlt("2021-10-31 03:00:00"), as.POSIXlt(1582963631, origin="1970-01-01"), NA, as.POSIXlt("2001-12-31 23:59:59")), length = 10),
			# NOTE: 1582963631 with origin="1970-01-01" corresponds to 2020 Feb 29
			"Column.J" = rep(c(as.POSIXct("2021-10-31 03:00:00"), as.POSIXct(1582963631, origin="1970-01-01"), NA, as.POSIXct("2001-12-31 23:59:59")), length = 10),
			stringsAsFactors = FALSE
	)
	cdf[["Column.F"]] <- factor(cdf[["Column.F"]])
	cdf[["Column.F"]] <- ordered(cdf[["Column.F"]], levels = c("Low", "Medium", "High"))

	# (*.xls)
	testDataFrame(file.xls, cdf)
	# (*.xlsx)
	testDataFrame(file.xlsx, cdf)

        # test clearSheets
        testClearSheets <- function(file, df) {
		df.short <- df[1,]

		# overwrite sheet with shorter version
		writeWorksheetToFile(file, data=c(df.short), sheet="cdfRegion")
		# default behaviour: not cleared
		checkEquals(nrow(readWorksheetFromFile(file, sheet="cdfRegion")), nrow(df))
		# overwrite sheet with shorter version
		writeWorksheetToFile(file, data=c(df.short), sheet="cdfRegion", clearSheets=TRUE)
		# should be cleared
		checkEquals(nrow(readWorksheetFromFile(file, sheet="cdfRegion")), 1)
	}

	testClearSheets(file.xls, cdf)
	testClearSheets(file.xlsx, cdf)

}
