#!/bin/bash
source ressources/${APP}/${APP}
CACHE_APP=cache/${APP}/
MOUNT_APP=/mnt/debmaker/${APP}/

[ -d ${CACHE_APP} ] || mkdir -p ${CACHE_APP}

########################## SUB FUNCTION ##########################
valideStep(){
	CURRENT_STEP=$1
	RESULT=0
	for tmp in ${STEP}
	do 
		if [ $tmp == ${CURRENT_STEP} ] ; then  
			RESULT=1
			break
		fi 
	done
	if [ $RESULT -eq 0 ]
	then
		echo invalid step
	fi
}

getSizeImage(){
	[ "${IMAGE_SIZE}" == "" ] && IMAGE_SIZE=2
}

createImage(){
	dd if=/dev/zero of=${CACHE_APP}/os bs=1G count=${IMAGE_SIZE}
	sudo mkfs.ext4 ${CACHE_APP}/os
}

previousStep(){
	CURRENT_STEP=$1
	TMP_STEP=os; 
	for tmp in ${STEP} 
	do 
		PREV=${TMP_STEP}
		TMP_STEP=$tmp  
		if [ $tmp == $CURRENT_STEP ] ; then  
			break
		fi 
	done
	echo $PREV
}

########################## FUNCTION ##########################

debmake_mountStep(){
	CURRENT_STEP=$1
	[ -d ${MOUNT_APP}/${CURRENT_STEP} ] || sudo mkdir -p ${MOUNT_APP}/${CURRENT_STEP}
	sudo mount ${CACHE_APP}/${CURRENT_STEP} ${MOUNT_APP}/${CURRENT_STEP}
	[ -d ${MOUNT_APP}/${CURRENT_STEP}/proc ] || sudo mkdir -p ${MOUNT_APP}/${CURRENT_STEP}/proc
	sudo mount -t proc proc ${MOUNT_APP}/${CURRENT_STEP}/proc
	[ -d ${MOUNT_APP}/${CURRENT_STEP}/sys ] || sudo mkdir -p ${MOUNT_APP}/${CURRENT_STEP}/sys
	sudo mount -t sysfs sys ${MOUNT_APP}/${CURRENT_STEP}/sys
	sleep 2
}

debmake_umountStep(){
	CURRENT_STEP=$1
	sudo umount ${MOUNT_APP}/${CURRENT_STEP}/sys
	sudo umount ${MOUNT_APP}/${CURRENT_STEP}/proc
	sudo umount ${MOUNT_APP}/${CURRENT_STEP}
}

debmake_chrootStep(){
	CURRENT_STEP=$1
	debmake_mountStep ${CURRENT_STEP}
	[ -d ${MOUNT_APP}/${CURRENT_STEP}/tmp/dist/${APP} ] && sudo rm -rf ${MOUNT_APP}/${CURRENT_STEP}/tmp/dist/
	sudo mkdir -p ${MOUNT_APP}/${CURRENT_STEP}/tmp/dist
	sudo cp -fr ressources/${APP}/* ${MOUNT_APP}/${CURRENT_STEP}/tmp/dist
	sudo cp -fr lib/exec_in_chroot.sh ${MOUNT_APP}/${CURRENT_STEP}/tmp/dist
	shift
	sudo chroot ${MOUNT_APP}${CURRENT_STEP}/ $*
	find ${MOUNT_APP}${CURRENT_STEP}/tmp/dist/ -name *.deb -exec cp {} dist/ \;
	debmake_umountStep ${CURRENT_STEP}
}

########################## FUNCTION ##########################

debmake_runStepOS() {
	CURRENT_STEP=os
	getSizeImage
	createImage
	debmake_mountStep ${CURRENT_STEP}
	sudo debootstrap ${DEBIAN_VERSION_CODENAME} ${MOUNT_APP}/os/
	debmake_umountStep ${CURRENT_STEP}
}

debmake_runStepCustom() {
	CURRENT_STEP=$1
	valideStep ${CURRENT_STEP}
	PREVIOUS=$(previousStep ${CURRENT_STEP})
	echo -n copy PREVIOUS in $PREVIOUS ...
	cp ${CACHE_APP}/${PREVIOUS} ${CACHE_APP}/${CURRENT_STEP}
	echo ": OK"
	debmake_chrootStep $1  /tmp/dist/exec_in_chroot.sh ${APP} ${CURRENT_STEP} ${GIT_VERSION} ${DEB_VERSION}
}

debmake_runAllStep(){
	debmake_runStepOS
	for tmp in ${STEP}
	do
		debmake_runStepCustom $tmp
	done
}