#!/bin/bash

do_install() {
	local GTKDIR GTK320DIR GTKVER INSTALL_DIR
	INSTALL_DIR="$1"
	GTKDIR="${INSTALL_DIR}/gtk-3.0"
	GTK320DIR="${INSTALL_DIR}/gtk-3.20"

	install -dm755 "${INSTALL_DIR}"

	cd src

	cp index.theme "${INSTALL_DIR}"

	cp -rt "${INSTALL_DIR}" \
			assets gtk-2.0 metacity-1 openbox-3 xfce-notify-4.0 xfwm4 unity

	for _DIR in "${GTKDIR}" "${GTK320DIR}"
	do
		GTKVER="${_DIR##*/}"

		mkdir -p "${_DIR}"

		cp -t "${_DIR}" \
			"${GTKVER}/gtk.css" \
			"${GTKVER}/gtk-dark.css" \
			"${GTKVER}/gtk.gresource" \
			"${GTKVER}/thumbnail.png"

		cd "${_DIR}"
		ln -srf ../assets assets
		cd -
	done
}


output_changes_file_version_marker() {

	line() {
		dashes="$(printf '%0.s-' $(seq 1 13))"
		echo "${dashes}>>>> $1 <<<<${dashes}"
	}

	tag_line="$(line $1)"

	echo "-${tag_line}${tag_line}${tag_line}-"
}


update_changes_file() {
	LAST_STABLE_RELEASE=$(git describe --abbrev=0 --tags $(git rev-list --tags --max-count=1))
	LAST_MAJOR_MINOR="${LAST_STABLE_RELEASE%.*}"

	LAST_MAJOR="${LAST_STABLE_RELEASE%%.*}"
	LAST_MINOR="${LAST_MAJOR_MINOR#*.}"
	LAST_PATCH="${LAST_STABLE_RELEASE##*.}"

	case "${PWD##*/}" in
		numix-gtk-theme)
			NEXT_PATCH=$(($LAST_PATCH + 1))

			NEXT_STABLE_RELEASE="${LAST_MAJOR_MINOR}.${NEXT_PATCH}"
		;;

		Numix-Frost)
			LAST_MAJOR=$(($LAST_MAJOR + 1))
			NEXT_STABLE_RELEASE="${LAST_MAJOR}.${LAST_MINOR}.${LAST_PATCH}"
			LAST_PATCH=$(($LAST_PATCH - 1))

			LAST_STABLE_RELEASE="${LAST_MAJOR}.${LAST_MINOR}.${LAST_PATCH}"
		;;

		*)
			echo 'Unknown directory!' && exit 1
		;;
	esac

	[[ -f CHANGES ]] && mv CHANGES CHANGES.old

	output_changes_file_version_marker "${NEXT_STABLE_RELEASE}" > CHANGES

	{ git log \
		--pretty=format:"[%ai] %<(69,trunc) %s %><(15) %aN {%h}" \
		--cherry-pick "${LAST_STABLE_RELEASE}...HEAD"; } >> CHANGES


	[[ -f CHANGES.old ]] && echo "" >> CHANGES && cat CHANGES.old >> CHANGES && rm CHANGES.old

	git add CHANGES
	git commit -m 'RELEASE PREP :: Update CHANGES file.'
	git push
}



case $1 in
	changes)
		update_changes_file
		exit $?
	;;

	install)
		do_install "$2"
	;;

	*)
		exit 0
	;;
esac