#!/bin/bash

MODULE_DIR="${ROOT_DIR}/remote"

#Create tools directory if not exists
TOOL_DIR="${MODULE_DIR}/tools"
INIT_DIR="${MODULE_DIR}/stage3.2"

# Keep track of processed modules
PROCESSED_MODULES=""

initial_checks ()
{
	for BIN in git locate
	do
		local TEST=$(which ${BIN})
		[ -z "$TEST" ] && pinfo "Installing $BIN..." && apt-get install $BIN
	done
}


read_config () 
{
	unset REQUIRED_BINARIES
	unset REQUIRED_LIBRARIES
	unset REQUIRED_DIRECTORIES
	unset REQUIRED_FILES
	unset REQUIRED_MODULES

	local TOOL_CONFIG="${TOOL_DIR}/${TOOL}/${TOOL}.conf"

	[ ! -e "${TOOL_CONFIG}" ] && perror "Config for '$TOOL' not found."

	. "${TOOL_CONFIG}" || perror "Sourcing '${TOOL_CONFIG}' failed."
}

read_build () 
{
	local BUILD_SCRIPT="${TOOL_DIR}/${TOOL}/${TOOL}.build"

	[ ! -e "${BUILD_SCRIPT}" ] && perror "Build script for specified tool not found."

	. "${BUILD_SCRIPT}" || perror "Sourcing '${BUILD_SCRIPT}' failed."
}

copyfileswithdependencies ()
{
	[ ! -d build ] && pinfo "No build directory found, skipping dependency copying" && return 0
	cd build


	COPYFILES_LIST="list_wanted_stage3.2"
	[ -e ${COPYFILES_LIST} ] && rm ${COPYFILES_LIST}

		
	[ ! -z "${REQUIRED_BINARIES}" ] && pinfo "Gathering required binaries from config file..."
	for FILENAME in ${REQUIRED_BINARIES}
	do
		FILE=$(find . -name "${FILENAME}" -type f -executable | xargs grep -l -E '^(.ELF|#!)' | head -1)
		if [ -z "$FILE" ]; then
			pwarning "\tNo Binary found for ${FILENAME}. Skipping." 
			continue
		fi
	
		pdebug "\tFound ${FILENAME} at ${FILE}"
		get_link_chain "${TOOL_DIR}/${TOOL}/build/${FILE}" "${TOOL_DIR}/${TOOL}/build" >> "${COPYFILES_LIST}"
		get_dynamic_dependencies -l "${TOOL_DIR}/${TOOL}/build" "${FILE}" >> "${COPYFILES_LIST}"
	done

	[ ! -z "${REQUIRED_LIBRARIES}" ] && pinfo "Gathering required libraries from config file..."
	for LIB in ${REQUIRED_LIBRARIES}
	do
		for LOCATION in $(find . -name ${LIB}.so\*)
		do
			pdebug "* $LOCATION"
			get_link_chain "${TOOL_DIR}/${TOOL}/build/${LOCATION}" "${TOOL_DIR}/${TOOL}/build"  >> "${COPYFILES_LIST}"
			get_dynamic_dependencies -l "${TOOL_DIR}/${TOOL}/build" "${LOCATION}" >> "${COPYFILES_LIST}"
		done
	done

	[ ! -z "${REQUIRED_DIRECTORIES}" ] && pinfo "Gathering required directories from config file..."
	local CURRENT_PWD=$(pwd) # Prevent calling pwd 50000 times inside the loop below
	for ENTRY in ${REQUIRED_DIRECTORIES}
	do
		pdebug "* ./$ENTRY"
		echo "./${ENTRY}" >> "${COPYFILES_LIST}"
		for BIN in $(find "./${ENTRY}" -type f -not -name '*.a' | xargs grep -l '^.ELF')
		do
			pdebug "   Searching libs for ${BIN}..."
			get_link_chain "${TOOL_DIR}/${TOOL}/build/${BIN}" "${TOOL_DIR}/${TOOL}/build" >> "${COPYFILES_LIST}"
			get_dynamic_dependencies -l "${TOOL_DIR}/${TOOL}/build" "${BIN}" >> "${COPYFILES_LIST}"
		done
	done

	[ ! -z "${REQUIRED_FILES}" ] && pinfo "Gathering required files from config file..."
	for ENTRY in ${REQUIRED_FILES}
	do
		get_link_chain "${TOOL_DIR}/${TOOL}/build/${ENTRY}" "${TOOL_DIR}/${TOOL}/build" >> "${COPYFILES_LIST}"
		get_dynamic_dependencies -l "${TOOL_DIR}/${TOOL}/build" "${TOOL_DIR}/${TOOL}/build/.${ENTRY}" >> "${COPYFILES_LIST}"
	done


	#copy to initramfsdir
	pdebug "[stage32] Completed file list generation at ${TOOL_DIR}/${TOOL}/build/${COPYFILES_LIST}."
	if [ -s "$COPYFILES_LIST" ]; then
		local CLISTCOUNT=$(cat "$COPYFILES_LIST" | wc -l)
		pinfo "Copying $CLISTCOUNT files to stage 3.2 target directory."
		tar -cp $(cat ${COPYFILES_LIST}|sort -u) | tar -xp -C "${INIT_DIR}"
		local RET=$?
		[ "x$RET" != "x0" ] && perror "Could not tar-copy to $INIT_DIR"
	fi
}

get_basic_libs () {
	
	[ ! -d ${INIT_DIR} ] && mkdir ${INIT_DIR}
	
	# copy libc and ld-linux separatly
	pinfo "Adding basic libs"
	BASICLIBS=""
	for i in $(ldd ${SHELL})
	do
        	if [ $(echo $i | grep '^/' | grep -c ld) -eq 1 -o  $(echo $i | grep '^/' | grep -c libc.so) -eq 1 ];
	        then
        	        pdebug "Adding $i"
	                BASICLIBS="${BASICLIBS} $i $(readlink -f "$i")"
	        fi
	done
	tar -cp ${BASICLIBS} | tar -xp -C ${INIT_DIR}
	local RET=$?
	[ "x$RET" != "x0" ] && perror "Could not tar-copy to $INIT_DIR"
}

generate_stage32 () {

	initial_checks

	get_basic_libs

	# if no arguments assume all.
	if [ "x$1" = "x" -o "x$1" = "xall" ]; then
		tools=$(ls ${TOOL_DIR})
		set -- $tools
	fi	

	# now iterate over given tools and copy them
	while (( "$#" )); do
		process_module "$1"
		shift
	done
	TOOL_STR=""
}

process_module() {
	[ "$#" -ne "1" ] && perror "process_module: want 1 param."
	local TOOL="$1"
	[[ "$PROCESSED_MODULES" == *"!${TOOL}!"* ]] && return # Already processed this module
	PROCESSED_MODULES="${PROCESSED_MODULES}!${TOOL}!"
	local TOOL_STR=""
	pinfo ">>>>>>>>>>>>>>>>> Processing module [ $TOOL ]"
	TOOL_STR="[${TOOL}]"
	if [ -d "${TOOL_DIR}/${TOOL}" ];
	then

		#[ "x$DEBUG" != "x1" ] \
		#	&& echo "Logging to ${TOOL_DIR}/${TOOL}/stage32.log" \
		#	&& exec 6>&1 > ${TOOL_DIR}/${TOOL}/stage32.log
		# TODO: Make above work with the new logging system (add function to logging.inc to switch logfile)
		cd "${TOOL_DIR}/${TOOL}" || perror "Tool dir '${TOOL_DIR}/${TOOL}' seems to exist, but cd to it failed."
		pinfo "## Reading config"
		read_config
		# Check if this module has a dependency that wasn't built yet:
		if [ ! -z "$REQUIRED_MODULES" ]; then
			pinfo "$TOOL depends on ${REQUIRED_MODULES}...."
			for DEP in $REQUIRED_MODULES; do
				#[[ "$DESIRED_MODULES" != *"!${DEP}!"* ]] && perror "$TOOL has dependency $DEP, but $DEP is not in current profile."
				process_module "$DEP"
			done
			# Read old config again, as it got overwritten by the deps
			cd "${TOOL_DIR}/${TOOL}" || perror "Tool dir '${TOOL_DIR}/${TOOL}' seems to exist, but cd to it failed (after building deps)."
			read_config
			pinfo "<<<<<<<<<<<<<<<<< Dependency modules processed, back to module [ $TOOL ]"
		fi
		pinfo "## Reading build"
		read_build
		pinfo "## Installing dependencies"
		install_dependencies
		pinfo "## Fetching source"
		fetch_source
		pinfo "## Building"
		build
		# remove *.la files as they might confuse libtool/linker of other tool packages
		find "${TOOL_DIR}/${TOOL}/build" -name '*.la' -exec rm -f {} \;
		pinfo "## Copying files with dependencies"
		copyfileswithdependencies
		pinfo "## Post copy"
		post_copy

		# reset pipes
		#[ "x$DEBUG" != "x1" ] && exec 1>&6 6>&- 
		# TODO
		pinfo "Module completed."
	else
		perror "Tool directory for '$TOOL' not found."
		# maybe make this a warning instead of error?
	fi
}

clean_tools() {
	if [ "x$1" = "x" -o "x$1" = "xall" ]; then
		#clean all
		if [ -d ${INIT_DIR} ]; then
			rm -rf "${INIT_DIR}" || perror "Error deleting $INIT_DIR"
		fi
	        for TOOL in $(ls ${TOOL_DIR}); do
			clean_tool $TOOL
        	done
	else 
		while (( "$#" )); do
			clean_tool $1
			shift
		done
	fi
}

clean_tool() {
        TOOLDIR=${TOOL_DIR}/$1
	pinfo "Cleaning ${TOOLDIR}..."
	#[ -e ${TOOLDIR}/build/list_wanted_stage3.2 ] && cd ${INIT_DIR} \
	#	&& xargs rm < ${TOOLDIR}/build/list_wanted_stage3.2
	#[ -d ${TOOLDIR}/data ] && cd ${INIT_DIR} \
#		&& xargs rm < $(find ${TOOLDIR}/data -type f)
	if [ -e ${TOOLDIR}/.built ]; then
		rm "${TOOLDIR}/.built" || perror "Could not clear built flag"
	fi
	if [ -e ${TOOLDIR}/.fetched_source ]; then
		rm "${TOOLDIR}/.fetched_source" || perror "Could not clear fetched_source flag"
	fi
	if [ -d ${TOOLDIR}/build ]; then
		rm -rf "${TOOLDIR}/build" || perror "Could not delete build path"
	fi
	if [ -d ${TOOLDIR}/src ]; then
		rm -rf "${TOOLDIR}/src" || perror "Could not delete src path"
	fi
	if [ -e ${TOOLDIR}/list_binaries_and_files ]; then
		rm "${TOOLDIR}/list_binaries_and_files" || perror "Could not delete list_binaries_and_files"
	fi
}