# Copyright 1999-2008 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

inherit toolchain-funcs eutils linux-mod flag-o-matic

BRI_VERSION="0.3.0-PRE-1y-l"
FLORZ_VERSION="0.3.0-PRE-1y-l_florz-12.1"

OSLEC_VERSION="0.1"
OSLEC_PATCH="oslec-${OSLEC_VERSION}-${P}"

IUSE="astribank bri ecmark ecmark2 ecmark3 ecaggressive eckb1 ecmg2 ecsteve ecsteve2 ecoslec florz
rtc watchdog zapras zapnet"

MY_P="${P/_/-}"

DESCRIPTION="Drivers for Digium and ZapataTelephony cards"
HOMEPAGE="http://www.asterisk.org"
SRC_URI="http://downloads.digium.com/pub/zaptel/releases/${MY_P}.tar.gz
	 bri? ( http://www.junghanns.net/downloads/bristuff-${BRI_VERSION}.tar.gz )
	 florz? ( http://zaphfc.florz.dyndns.org/zaphfc_${FLORZ_VERSION}.diff.gz )
	 ecoslec? ( http://www.rowetel.com/ucasterisk/downloads/oslec-${OSLEC_VERSION}.tar.gz
			mirror://gentoo/${OSLEC_PATCH}.diff.gz )"

S="${WORKDIR}/${MY_P}"

S_BRI="${WORKDIR}/bristuff-${BRI_VERSION}"
S_OSLEC="${WORKDIR}/oslec-${OSLEC_VERSION}/kernel"

SLOT="0"
LICENSE="GPL-2"
KEYWORDS="~amd64 ~x86"

RDEPEND="virtual/libc
	dev-libs/libusb
	>=dev-libs/newt-0.50.0
	astribank? ( dev-lang/perl )
	ecoslec? ( dev-util/dialog )"

DEPEND="${RDEPEND} virtual/linux-sources"

# list of echo canceller use flags,
# first active in this list is selected (=order does matter)
ZAP_EC_FLAGS="ecmark ecmark2 ecmark3 ecsteve ecsteve2 eckb1 ecmg2 ecoslec"

### Begin: Helper functions

select_echo_cancel() {
	local myEC=""

	for x in ${ZAP_EC_FLAGS}; do
		if use $x; then
			myEC=$(echo "$x" | sed -e "s:^ec::" | tr '[:lower:]' '[:upper:]')
			break;
		fi
	done

	echo ${myEC}
}

zconfig_disable() {
	if grep -q "${1}" ${S}/zconfig.h; then
		# match a little more than ${1} so we can use zconfig_disable
		# to disable all echo cancellers in zconfig.h w/o calling it several times
		sed -i -e "s:^[ \t]*#define[ \t]\+\(${1}[a-zA-Z0-9_-]*\).*:#undef \1:" \
			${S}/zconfig.h
	fi

	return $?
}

zconfig_enable() {
	if grep -q "${1}" ${S}/zconfig.h; then
		sed -i  -e "s:^/\*[ \t]*#define[ \t]\+\(${1}\).*:#define \1:" \
			-e "s:^[ \t]*#undef[ \t]\+\(${1}\).*:#define \1:" \
			${S}/zconfig.h
	fi

	return $?
}

### End: Helper functions

pkg_setup() {
	local result=0 numec=0

	linux-mod_pkg_setup

	einfo "Running pre-flight checks..."

	# basic zaptel checks
	if kernel_is 2 4 ; then
		if ! linux_chkconfig_present CRC32; then
			echo
			eerror "Your kernel lacks CRC32 support!"
			eerror "Enable CONFIG_CRC32!"
			result=$((result+1))
		fi
	else
		if ! linux_chkconfig_present CRC_CCITT; then
			echo
			eerror "Your kernel lacks CRC_CCIT support!"
			eerror "Enable CONFIG_CRC_CCIT!"
			result=$((result+1))
		fi
		if ! linux_chkconfig_present FW_LOADER; then
			echo
			eerror "Your kernel lacks FW_LOADER support!"
			eerror "Enable CONFIG_FW_LOADER!"
			result=$((result+1))
		fi
	fi

	# check if multiple echo cancellers have been selected
	for x in ${ZAP_EC_FLAGS}; do
		use $x && numec=$((numec+1))
	done
	if [[ $numec -gt 1 ]]; then
		# multiple flags are active, only the first in the ZAP_EC_FLAGS list
		# will be used, make sure the user knows about this
		echo
		ewarn "Multiple echo canceller flags are active but only one will be used!"
		ewarn "Selected: $(select_echo_cancel)"
	fi

	# we need at least HDLC generic support
	if use zapnet && ! linux_chkconfig_present HDLC; then
		echo
		eerror "zapnet: Your kernel lacks HDLC support!"
		eerror "zapnet: Enable CONFIG_HDLC* to use zaptel network support!"
		result=$((result+1))
	fi

	# zapras needs PPP support
	if use zapras && ! linux_chkconfig_present PPP; then
		echo
		eerror "zapras: Your kernel lacks PPP support!"
		eerror "zapras: Enable CONFIG_PPP* to use zaptel ras support!"
		result=$((result+1))
	fi

	# rtc needs linux-2.6 and CONFIG_RTC
	if use rtc; then
		if ! kernel_is 2 6; then
			echo
			eerror "rtc: >=Linux-2.6.0 is needed for rtc support!"
			result=$((result+1))
		fi

		if ! linux_chkconfig_present RTC; then
			eerror "rtc: Your kernel lacks RealTime-Clock support!"
			result=$((result+1))
		fi
	fi

	if [[ $result -gt 0 ]]; then
		echo
		ewarn "One or more of the neccessary precondition(s) is/are not met!"
		ewarn "Look at the messages above, resolve the problem (or disable the use-flag) and try again"
		echo

		if [[ $result -lt 3 ]]; then
			eerror "[$result Error(s)] Zaptel is not happy :("
		else
			eerror "[$result Error(s)] You're making zaptel cry :'("
		fi
		die "[$result] Precondition(s) not met"
	fi

	echo
	einfo "Zaptel is happy and continues... :)"
}

src_unpack() {
	unpack ${A}

	cd ${S}
	epatch ${FILESDIR}/${P}-gentoo.diff
	epatch ${FILESDIR}/zaptel-1.2.9.1-ar.patch

	# try to apply bristuff patch
	if use bri; then
		# fix for userpriv
		chmod -R a=rwX ${S_BRI}

		einfo "Patching zaptel w/ BRI stuff (${BRI_VERSION})"
		epatch ${S_BRI}/patches/zaptel.patch

		cd ${S_BRI}

		if use florz; then
			einfo "Patching zaptel with florz (${FLORZ_VERSION}) for zaphfc"
			epatch ${WORKDIR}/zaphfc_${FLORZ_VERSION}.diff
		fi

		# patch includes
		sed -i  -e "s:^#include.*zaptel\.h.*:#include <zaptel.h>:" \
			qozap/qozap.c \
			zaphfc/zaphfc.c \
			cwain/cwain.c

		# patch makefiles
		sed -i  -e "s:^ZAP[\t ]*=.*:ZAP=-I${S}:" \
			-e "s:^MODCONF=.*:MODCONF=/etc/modules.d/zaptel:" \
			-e "s:linux-2.6:linux:g" \
			qozap/Makefile \
			zaphfc/Makefile \
			cwain/Makefile

		sed -i  -e "s:^\(CFLAGS+=-I. \).*:\1 \$(ZAP):" \
			zaphfc/Makefile

		cd ${S}
	fi

	# oslec echo canceller
	if use ecoslec; then
		#
		# meh... bristuff and oslec patch are touching the same place,
		# apply bristuff first then fixup the oslec patch
		# ugly, but saves us from creating yet another set of patches
		#
		if use bri; then
			sed -i \
				-e "s:^-\(#define ECHO_CAN_KB1\).*:-/* \1 */:" \
				-e "s:^.*\(#define ECHO_CAN_MG2\).*: \1:" \
				"${WORKDIR}/${OSLEC_PATCH}.diff" || die "Failed to fix oslec patch for bri"
		fi

		EPATCH_SINGLE_MSG="Applying ${OSLEC_PATCH} zaptel patch" \
			epatch "${WORKDIR}/${OSLEC_PATCH}.diff"
	fi

### Configuration changes
	local myEC

	# prepare zconfig.h
	myEC=$(select_echo_cancel)
	if [[ -n "${myEC}" ]]; then
		einfo "Selected echo canceller: ${myEC}"
		# disable default first, set new selected ec afterwards
		zconfig_disable ECHO_CAN
		zconfig_enable ECHO_CAN_${myEC}
	fi

	# enable rtc support on 2.6
	if use rtc && linux_chkconfig_present RTC && kernel_is 2 6; then
		einfo "Enabling ztdummy RTC support"
		zconfig_enable USE_RTC
	fi

	# enable agressive echo surpression
	use ecaggressive && \
		zconfig_enable AGGRESSIVE_SUPPRESSOR

	# ppp ras support
	use zapras && \
		zconfig_enable CONFIG_ZAPATA_PPP

	# frame relay, syncppp...
	use zapnet && \
		zconfig_enable CONFIG_ZAPATA_NET

	# zaptel watchdog
	use watchdog && \
		zconfig_enable CONFIG_ZAPTEL_WATCHDOG
}

src_compile() {
	# build oslec first to avoid warnings about undefined symbols
	if use ecoslec; then
		cd "${S_OSLEC}"
		make KVERS=${KV_FULL} \
			KDIR=${KV_DIR} \
			ARCH=$(tc-arch-kernel) || die "emake oslec failed"
		cp Module.symvers ${S}/ || einfo "unable to copy oslec Module.symvers"
		cd ${S}
	fi
	
	# build
	make KVERS=${KV_FULL} \
	     KSRC=${KV_DIR} ARCH=$(tc-arch-kernel) || die

	if use astribank; then
		cd ${S}/xpp/utils
		make || die "make xpp utils failed"
	fi

	if use bri; then
		cd ${S_BRI}
		for x in cwain qozap zaphfc; do
			einfo "Building ${x}..."
			make KVERS=${KV_FULL} \
				KSRC=${KV_DIR} \
				ARCH=$(tc-arch-kernel) \
				-C ${x} || die "make ${x} failed"
		done
	fi
}

src_install() {
	# Create firmware directory
	mkdir -p ${D}/lib/firmware/

	kernel_is 2 4 && cp /etc/modules.conf ${D}/etc
	make DESTDIR=${D} ARCH=$(tc-arch-kernel) \
	KVERS=${KV_FULL} KSRC=${KV_DIR} devices firmware \
	install-modules install-programs || die

	dodoc ChangeLog README README.udev README.fxsusb zaptel.init
	dodoc zaptel.conf.sample LICENSE zaptel.sysconfig README.fxotune

	# additional tools
	dobin ztmonitor ztspeed zttest fxotune

	# install all header files, several packages need the complete set
	# (e.g. sangoma wanpipe)
	insinto /usr/include/zaptel
	doins *.h

	if use bri; then
		einfo "Installing bri"
		cd ${S_BRI}

		insinto /lib/modules/${KV_FULL}/misc
		doins qozap/qozap.${KV_OBJ}
		doins zaphfc/zaphfc.${KV_OBJ}
		doins cwain/cwain.${KV_OBJ}

		# install example configs for octoBRI and quadBRI
		insinto /etc
		doins qozap/zaptel.conf.octoBRI
		newins qozap/zaptel.conf zaptel.conf.quadBRI
		newins zaphfc/zaptel.conf zaptel.conf.zaphfc

		insinto /etc/asterisk
		doins qozap/zapata.conf.octoBRI
		newins qozap/zapata.conf zapata.conf.quadBRI
		newins zaphfc/zapata.conf zapata.conf.zaphfc

		docinto bristuff
		dodoc CHANGES INSTALL

		docinto bristuff/qozap
		dodoc qozap/TODO qozap/*.conf*

		docinto bristuff/zaphfc
		dodoc zaphfc/*.conf

		docinto bristuff/cwain
		dodoc cwain/TODO

		cd ${S}
	fi

	if use ecoslec; then
		cd "${S_OSLEC}"
		insinto /lib/modules/${KV_FULL}/misc
		doins oslec.${KV_OBJ}

		newsbin oslec-ctrl-panel.sh	oslec-ctrl-panel

		docinto oslec
		dodoc ../{README.txt,COPYING}

		cd "${S}"
	fi

	# install init script
	newinitd ${FILESDIR}/zaptel.rc6 zaptel
	newconfd ${FILESDIR}/zaptel.confd zaptel

	# install udev rule file
	insinto /etc/udev/rules.d
	newins ${FILESDIR}/zaptel.udevd 10-zaptel.rules

	if use astribank; then
		cd ${S}/xpp/utils
		eval `perl '-V:installarchlib'`
		make DESTDIR=${D} PERLLIBDIR=${installarchlib} install || die "failed xpp utils install"
		dosbin zt_registration xpp_sync xpp_blink lszaptel zapconf zaptel_drivers zaptel_hardware
		docinto astribank
		dodoc ../README.Astribank ../README.metering
	fi
}

pkg_postinst() {
	linux-mod_pkg_postinst

	echo
	einfo "Use the /etc/init.d/zaptel script to load zaptel.conf settings on startup!"
	einfo "This ebuild no longer sets permissions on device nodes. Please review"
	einfo " /etc/udev/rules.d/10-zaptel.rules or the appropriate configuration"
	einfo " method for your device node manager."
	echo

	if use bri; then
		einfo "Bristuff configs have been merged as:"
		einfo ""
		einfo "${ROOT}etc/"
		einfo "    zaptel.conf.zaphfc"
		einfo "    zaptel.conf.quadBRI"
		einfo "    zaptel.conf.octoBRI"
		einfo ""
		einfo "${ROOT}etc/asterisk/"
		einfo "    zapata.conf.zaphfc"
		einfo "    zapata.conf.quadBRI"
		einfo "    zapata.conf.octoBRI"
		echo
	fi

	if use ecoslec; then
		einfo "The OSLEC control panel has been installed as:"
		einfo "   \"/usr/sbin/oslec-ctrl-panel\""
		echo
		einfo "Important options in zapata.conf:"
		einfo "   echocancel=yes"
		einfo "   echocancelwhenbridged=no"
		einfo "   ;echotraining=400 (must be disabled)"
		echo
		einfo "More information about the OSLEC echo canceller:"
		einfo "   \"http://www.rowetel.com/ucasterisk/oslec.html\""
		echo
	fi
}