#!/usr/bin/env sh
dependencies="sed test cp libreoffice expr cut file"

# target filename
tn1="dhl-cp1252-n.csv"
tn2="dhl-cp1252-rn.csv"

assert_tools () {
	while test $# -gt 0; do
		command -v "$1" >/dev/null 2>/dev/null || {
			echo "tool missing: "$1
			exit 2
		}
		shift
	done
}
assert_tools ${dependencies}

testcmp () {
	# usage: testcmp "cmpresult" "cmdfunctionname"  [ "argument1", "argument2", […] ]
	if test "$#" -eq 0 ; then
		echo "arguments missing."; exit 1
	fi
	# whitelisted functions
	case $2 in
	# 2 arg functions where file exists
	convnl)
		expect="$1"
		fn="$2"
		shift 2
		if test -e "$expect" ; then
			echo "not testing as result $expect already exists."
		else
			result=$("$fn" "$1" "$2")
			if test -e $expect ; then
				echo "passed $fn for: $1 $2."
			else
				echo "failed $fn for: $1 $2."
			fi
		fi
	;;
	# 2 arg functions
	chklength|stringcrop)
		expect="$1"
		fn="$2"
		shift 2
		while test "$#" -ge "2"; do
			result=$("$fn" "$1" "$2")
			if test "$result" = "$expect" ; then
				echo "passed $fn for: $1 $2."
			else
				echo "failed $fn for: $1 $2."
			fi
			shift 2
		done
	;;
	# 1 arg functions
	iso3countrycode)
		expect="$1"
		fn="$2"
		shift 2
		for a in "$@"; do 
			result=$("$fn" "$a")
			if test "$result" = "$expect" ; then
				echo "passed $fn for: $a."
			else
				echo "failed $fn for: $a."
			fi
		done
	;;
	*)
		echo "no test performed, function or command not allowd."
	esac
}

chklength () {
	test "$#" -eq "0" && { echo "-1"; }
	expect="$1"; shift
	result=$(expr length "$1")
	test "$expect" -eq "$result" && { echo "true"; } || { echo "$result"; }
}

testchklength () {
	testcmp "true" "chklength" "3" "123"
	testcmp "3" "chklength" "2" "1-2"
}

stringcrop () {
	echo "$1" | cut -c1-"$2"
}

teststringcrop () {
	testcmp "string" "stringcrop" "string too long" "6"
}

# convert country to countrycode as in ISO3, see https://unstats.un.org/unsd/tradekb/Knowledgebase/Country-Code
iso3countrycode () {
	if test "$#" -eq 0 ; then
		echo "argument missing. ($0)"
	else
		case "$1" in
			Belgien|Belgium|Belgique) echo "BEL";;
			Deutschland|Germany|Allemagne) echo "DEU";;
			England|Great\ Britain|United\ Kingdom|Scotland|Wales|North\ Ireland) echo "GBR";;
			Luxemburg|Luxembourg) echo "LUX";;
			Niederlande|Netherlands) echo "NLD";;
			Österreich|Austria|Autriche) echo "AUT";;
			Schweiz|Switzerland|Suisse) echo "CHE";;
			Ungarn|Hungaria) echo "HUN";;
			#
			Tschechien|Czechia|Tchéquie|Česko) echo "CZE";;
			Polen|Poland|Pologne|Polska) echo "POL";;
			Weißrussland|Belarus|Biélorussie|Беларусь) echo "BLR";;
			Russland|Russia|Russie|Россия) echo "RUS";;
			Slowakei|Slovakia|Slovaquie|Slovensko) echo "SVK";;
			Italien|Italy|Italie|Italia) echo "ITA";;
			Italien|Italy|Italie|Italia) echo "ITA";;
			Norwegen|Norway|Norvège|Norge|Noreg|Norga) echo "NOR";;
			Schweden|Sweden|Suède|Sverige) echo "SWE";;
			Dänemarl|Denmark|Danemark|Danmark) echo "DNK";;
			Island|Iceland|Islande|Ísland) echo "ISL";;
			Finnland|Finland|Finlande|Suomi|Finland) echo "FIN";;
			Spanien|Spain|Espagne|España) echo "ESP";;
			Estland|Estonia|Estonie|Eesti) echo "EST";;
			Litauen|Lithuania|Lituanie|Lietuva) echo "LTU";;
			Lettland|Latvia|Lettonie|Latvija) echo "LVA";;
			Irland|Ireland|Irlande|Éire) echo "IRL";;
			Indien|India|Inde|Bharat) echo "IND";;
			China|China|Chine|中国|Zhōngguó) echo "CHN";;
			Japan|Japan|Japon|Nippon|Nihon) echo "JPN";;
			*) echo "unknown country: $1";exit 1;; 
		esac
	fi
}

testiso3 () {
	# covering data in https://doku.ccc.de/index.php?title=Attribut:Chaostreff-Country&limit=500&offset=0
	testcmp "BEL" "iso3countrycode" "Belgien" "Belgium" "Belgique"
	testcmp "DEU" "iso3countrycode" "Deutschland" "Germany" "Allemagne"
	testcmp "GBR" "iso3countrycode" "England" "Great Britain" "United Kingdom" "Scotland" "Wales" "North Ireland"
	testcmp "LUX" "iso3countrycode" "Luxembourg" "Luxemburg"
	testcmp "NLD" "iso3countrycode" "Niederlande" "Netherlands"
	testcmp "AUT" "iso3countrycode" "Österreich" "Austria" "Autriche"
	testcmp "HUN" "iso3countrycode" "Ungarn" "Hungaria"
	testcmp "CHE" "iso3countrycode" "Schweiz" "Switzerland" "Suisse"
	# and coving some more
	testcmp "CZE" "iso3countrycode" "Tschechien" "Czechia" "Tchéquie" "Česko"
	testcmp "POL" "iso3countrycode" "Polen" "Poland" "Pologne" "Polska"
	testcmp "BLR" "iso3countrycode" "Weißrussland" "Belarus" "Biélorussie" "Беларусь"
	testcmp "RUS" "iso3countrycode" "Russland" "Russia" "Russie" "Россия"
	testcmp "SVK" "iso3countrycode" "Slowakei" "Slovakia" "Slovaquie" "Slovensko"
	testcmp "ITA" "iso3countrycode" "Italien" "Italy" "Italie" "Italia"
	testcmp "NOR" "iso3countrycode" "Norwegen" "Norway" "Norvège" "Norge" "Noreg" "Norga"
	testcmp "SWE" "iso3countrycode" "Schweden" "Sweden" "Suède" "Sverige"
	testcmp "DNK" "iso3countrycode" "Dänemarl" "Denmark" "Danemark" "Danmark"
	testcmp "ISL" "iso3countrycode" "Island" "Iceland" "Islande" "Ísland"
	testcmp "ISR" "iso3countrycode" "Israel" "Israel" "Israël"
	testcmp "FIN" "iso3countrycode" "Finnland" "Finland" "Finlande" "Suomi" "Finland"
	testcmp "ESP" "iso3countrycode" "Spanien" "Spain" "Espagne" "España"
	testcmp "EST" "iso3countrycode" "Estland" "Estonia" "Estonie" "Eesti"
	testcmp "LTU" "iso3countrycode" "Litauen" "Lithuania" "Lituanie" "Lietuva"
	testcmp "LVA" "iso3countrycode" "Lettland" "Latvia" "Lettonie" "Latvija"
	testcmp "IRL" "iso3countrycode" "Irland" "Ireland" "Irlande" "Éire"
	testcmp "IND" "iso3countrycode" "Indien" "India" "Inde" "Bharat"
	testcmp "CHN" "iso3countrycode" "China" "China" "Chine" "中国" "Zhōngguó"
	testcmp "JPN" "iso3countrycode" "Japan" "Japan" "Japon" "Nippon" "Nihon" "日本国" "日本"
	testcmp "" "iso3countrycode" "Simbabwe" # should fail
}

# replace newline 0a with 0d 0a for dos version
# test with: echo | sed 's/$'"/`echo \\\r`/" | hexdump
convnl () {
	if="$1"
	of="$2"
	shift 2
	expect="0a0d" # hexdump does reverse the byte order
	result=$(echo | sed 's/$'"/`echo \\\r`/" | hexdump |head -1|cut -d" " -f2)
	if test $expect = $result ; then
		sed -e 's/$'"/`echo \\\r`/" "$if" > "$of"
	fi
}
testconvnl () {
	testcmp "$tn2" "convnl" "$tn1" "$tn2" && rm "$tn2"
}

getauth () {
	# Zugangsdaten für das Mediawiki aus Konfiguratonsdatei bzw. ggf. 
	user=""
	pass=""
	test -f ds.conf && {
		user=$(cat ds.conf|grep -i "^user="|cut -d= -f2) #
		pass=$(cat ds.conf|grep -i "^pass="|cut -d= -f2) # 
	} || {
		command pass 2>/dev/null && {
			passfile="$(cat ds.conf|grep -i "^passfile="|cut -d= -f2)" # ccc/doku-htaccess
			passstore="$(cat ds.conf|grep -i "^passstore="|cut -d= -f2)" # ~/.password-store/
			test -f ${passstore}${passfile} || { >&2 echo "path for password manager does not match: "${passfile}; exit 1; }
			user=$(pass ${passfile} |grep -i "^login "|rev|cut -d" " -f1|rev)
			pass=$(pass ${passfile} |head -1)
		} || { >&2 echo "tool missing: pass (unix password manager)"; exit 1; }
	}
	test "$user" = "" && { >&2 echo "no auth data found."; exit 1; }
	echo "${user}:${pass}"
}


runtests () {
	testchklength
	teststringcrop
	testiso3
	testconvnl
}
runtests

exit 0

# untested:

# todo: download file (its UTF-8 encoded)

fn="dhl.csv"
# backup
cp -f "$fn" "${fn}.bak"



# replace special spaces and hyphens
sed -i -e 's/[\u00A0\u202F[:space:]]+/ /g' -e 's/[\u2010\u2011\u2012\u2013\u002D]+/-/g' -e 's/[\u00AD\uFEFF]+//g' "$fn"
# todo: add quote variants
# todo: check for delimiters that may conflict during conversion

# convert encoding from UTF-8 to CP1252 / WINDOWS-1252
# another possibility for conversion? seems not to be relyable: iconv -o "$of" -f UTF-8 -t WINDOWS-1252 "$if" 
convcsv () {
	if test $# -eq 0 ; then >&2 echo "argument missing."; exit 1; fi
# doc for headless conversion options https://wiki.openoffice.org/wiki/Documentation/DevGuide/Spreadsheets/Filter_Options
	if="${1}"
	format=$(file ${if}|rev|cut -d':' -f1|rev|cut -d' ' -f2)
	if test "$format" != "UTF-8" ; then >&2 echo "source file encoding not matching 'UTF-8' as expected."; fi
	of=$(echo "${if}"|rev|cut -d. -f2-|rev)".ods"
	if test -e $of ; then >&2 echo "output file already exists."; exit 2; fi 
	#~ iconv -o "$of" -f $format -t cp1252//TRANSLIT "$if"
	#~ iconv -o "$of" -f $format -t WINDOWS-1252 "$if"
	# to take care of more options in csv at the same time, convert to ods and back to csv
	libreoffice --headless --convert-to ods --infilter=CSV:59,34,76,1 "${if}" && {
		mv "${if}" "${if}.bak"
		libreoffice --headless --infilter=CSV:59,34,76,1 --convert-to csv:"Text - txt - csv (StarCalc)":"44,34,1,0,1,,0" "${tf}" && {
			rm "${tf}" "${if}.bak"
		}
	}
	format=$(file ${if}|cut -d' ' -f2)
	if test "$format" != "Non-ISO" ; then >&2 echo "output file encoding not matching the expected Non-ISO, its $format."; fi
}
convcsv "$fn"