#!/bin/sh
#
# Copyright (C) 2012, 2016  Etersoft
# Copyright (C) 2012, 2016  Vitaly Lipatov <lav@etersoft.ru>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#

load_helper epm-query

__epm_changelog_apt()
{
	local i
	for i in $@ ; do
		docmd apt-cache show $i | grep -A 1000 "^Changelog:"
	done
}

__epm_changelog_files()
{
	[ -z "$*" ] && return

	# TODO: detect every file
	case $(get_package_type $1) in
		rpm)
			assure_exists rpm
			docmd_foreach "rpm -q -p --changelog" $@ | less
			;;
#		deb)
#			
#			;;
		*)
			fatal "Have no suitable command for $1"
			;;
	esac
}

__epm_changelog_local_names()
{
	[ -z "$*" ] && return

	case $PMTYPE in
		apt-rpm|yum-rpm|dnf-rpm|urpm-rpm|zypper-rpm)
			docmd_foreach "rpm -q --changelog" $@ | less
			;;
		apt-dpkg|aptitude-dpkg)
			docmd zcat /usr/share/doc/$1/changelog.Debian.gz | less
			;;
		emerge)
			assure_exists equery
			docmd equery changes -f $1 | less
			;;
		pacman)
			docmd pacman -Qc $1 | less
			;;
		*)
			fatal "Have no suitable command for $PMTYPE"
			;;
	esac
}

__epm_changelog_unlocal_names()
{
	[ -z "$*" ] && return

	case $PMTYPE in
		apt-rpm)
			__epm_changelog_apt $@ | less
			;;
		#apt-dpkg)
		#	# FIXME: only first pkg
		#	docmd zcat /usr/share/doc/$1/changelog.Debian.gz | less
		#	;;
		#yum-rpm)
		#	sudocmd yum clean all
		#	;;
		urpm-rpm)
			docmd urpmq --changelog $@ | less
			;;
		#zypper-rpm)
		#	sudocmd zypper clean
		#	;;
		emerge)
			assure_exists equery
			docmd equery changes -f $1 | less
			;;
		*)
			fatal "Have no suitable command for $PMTYPE. Try install the package firstly."
			;;
	esac

}


epm_changelog()
{
	[ -n "$pkg_filenames" ] || fatal "Changelog: Missing package(s) name"

	__epm_changelog_files $pkg_files

	local pkg
	for pkg in $pkg_names ; do
		if is_installed $pkg ; then
			__epm_changelog_local_names $pkg
		else
			__epm_changelog_unlocal_names $pkg
		fi
	done
}