#!/bin/bash
# usage: $0 dir [-u xyz-uvw|-ua|-uaf]

cd "$1" || exit 1
shift

typeset -a langs
langs=(
	fra-deu deu-fra
	deu-eng eng-deu
	fra-eng eng-fra
	spa-eng eng-spa
	)

typeset -A long
long[fra]=French
long[deu]=German
long[eng]=English
long[spa]=Spanish

typeset -A contrs
contrs[deu-eng-bin]=\
'# Contributor: akane <grangerspit@gmail.com> <xmpp:heiß@neko.im>'$'\n'
contrs[eng-deu-bin]=\
'# Contributor: akane <grangerspit@gmail.com> <xmpp:heiß@neko.im>'$'\n'
contrs[fra-eng-bin]=\
'# Contributor: Benjamin Vanderford <hazor_at_swrpg_dot_info>'$'\n'
contrs[eng-fra-bin]=\
'# Contributor: Benjamin Vanderford <hazor_at_swrpg_dot_info>'$'\n'

typeset -A prepare
prepare[deu-fra]=\
'prepare()
{
	cd $_lang
	sed -i '"'"'s/\(10\)\(100\>.*1 mit 100 Nullen\)/\1\^\2/'"'"' ${_lang}.tei
}
'
prepare[deu-fra-bin]=\
'prepare()
{
	cd $_lang
	dictzip -d ${_lang}.dict.dz
	sed -i '"'"'s/\(10\)\(100\>.*1 mit 100 Nullen\)/\1\^\2/'"'"' ${_lang}.dict
	dictzip ${_lang}.dict
}
'

# $1: string to replace: regular expression
# $2: string to replace with: sed replacement string
function replace
{
	sed -i "s/${1}/${2}/g" "$tmp"
}

# $1 line to replace: regular expression
# $2 text to replace with: (newline terminated) sed replacement string
# $3 removal type: (rm-plus-one|normal)
function replace_line
{
	if test -n "$2"
	then
		cat <(sed "/${1}/,\$ d" < "$tmp") \
			<(echo -n "$2") \
			<(sed "0,/${1}/ d" < "$tmp") \
			> "$tmp_"
		mv "$tmp_" "$tmp"
	else
		if [[ "$3" == rm-plus-one ]]
		then
			sed -i "/${1}/,+1 d" "$tmp"
		else
			sed -i "/${1}/ d" "$tmp"
		fi
	fi
}

# $1 line to delete: regular expression
function delete_line
{
	sed -i "/${1}/ d" "$tmp"
}

function update
{
	echo "Updating ${lang}${ext} (${pkgver} -> ${convver})..."

	lang_a="${long[${lang%-*}]}"
	lang_b="${long[${lang#*-}]}"

	checksum="$(wget -qO - "$url" | sha512sum | sed -E 's/\s*-$//')"

	tmp_d="$(mktemp -d)"
	tmp="$tmp_d/a"
	tmp_="$tmp_d/b"

	cp ../sample.PKGBUILD "$tmp"

	replace '%LANG%' "$lang"
	replace '%LANG_A%' "$lang_a"
	replace '%LANG_B%' "$lang_b"
	replace '%VER%' "$convver"
	replace '%CHECKSUM%' "$checksum"

	replace_line '%CONTRS%' "${contrs[${lang}${ext}]}" normal

	if [[ "$ver" == "$convver" ]]
	then
		delete_line '^_pkgver=\${pkgver\/\/_\/-}$'
		replace '_pkgver' 'pkgver'
	fi

	replace_line '%PREPARE%' "${prepare[${lang}${ext}]}" rm-plus-one

	mv "$tmp" PKGBUILD
	makepkg --printsrcinfo > .SRCINFO

	rm -r "$tmp_d"
}

# $1 type: (src|bin)
# $2 suffix: (|-bin)
# $3 platform: (src|dictd)
# ${@:4} args: $@
function handle_all
{
	type="$1"
	ext="$2"
	platform="$3"
	shift 3

	cd "$type"

	for lang in ${langs[@]}
	do
		cd dict-freedict-${lang}${ext}
		git pull -q
		pkgver="$(grep pkgver .SRCINFO | sed -E 's/\s*pkgver\s*=\s*(.+)\s*/\1/')"
		ver="$(jq -r ".[] | select(.name == \"${lang}\") | .releases[] | select(.platform==\"$platform\") | .version" ../../freedict-database.json)"
		url="$(jq -r ".[] | select(.name == \"${lang}\") | .releases[] | select(.platform==\"$platform\") | .URL" ../../freedict-database.json)"
		url="${url%/download}"
		convver="${ver//-/_}"

		if [[ "$pkgver" != "$convver" ]]
		then
			echo "${lang}${ext} requires update (${pkgver} -> ${convver})."
			ureq=true
		else
			ureq=false
		fi

		if [[ "$url" != "https://sourceforge.net/projects/freedict/files/${lang}/${ver}/freedict-${lang}-${ver}.${platform}.tar.xz" ]]
		then
			echo "${lang}${ext} URL changed (${url})."
		else
			if [[ "$1" == "-u" && "$2" == "$lang${ext}" ]] \
				|| ([[ "$1" == "-ua" ]] && $ureq) \
				|| [[ "$1" == "-uaf" ]]
			then
				update
			fi
		fi

		cd ..
	done

	cd ..
}


curl -sO http://freedict.org/freedict-database.json

handle_all src ''   src   "$@"
handle_all bin -bin dictd "$@"