#! /bin/bash

set -e

source ./info.sh

if [[ -z $ROOTFS_PATH ]]
then
	echo "Error: ROOTFS PATH is not set!"
	exit 1
fi

# Mount

mount --bind /dev "$ROOTFS_PATH/dev"
mount -t tmpfs run "$ROOTFS_PATH/run" -o mode=0755,nosuid,nodev
mount -t proc proc "$ROOTFS_PATH/proc" -o nosuid,nodev,noexec
mount -t sysfs sys "$ROOTFS_PATH/sys" -o nosuid,nodev,noexec,ro

# Setup Chroot scripts

cp -rvf ./chroot_scripts "$ROOTFS_PATH/"
cp -rvf ./hooks "$ROOTFS_PATH/chroot_scripts/"
cp -rvf ./live-lists "$ROOTFS_PATH/chroot_scripts/"
cp -rvf ./pool-lists "$ROOTFS_PATH/chroot_scripts/"
cp -rvf ./rem-lists "$ROOTFS_PATH/chroot_scripts/"
cp -rvf ./info.sh "$ROOTFS_PATH/chroot_scripts/"

# Run chroot_script inside ROOTFS

chroot "$ROOTFS_PATH" bash -c "/chroot_scripts/0-chroot.sh"
rm -rfv "$ROOTFS_PATH/chroot_scripts"

# Unmount

umount "$ROOTFS_PATH/dev" || umount -lf "$ROOTFS_PATH/dev" || true
umount "$ROOTFS_PATH/run" || umount -lf "$ROOTFS_PATH/run" || true
umount "$ROOTFS_PATH/proc" || umount -lf "$ROOTFS_PATH/proc" || true
umount "$ROOTFS_PATH/sys" || umount -lf "$ROOTFS_PATH/sys" || true

# Generate Squashfs image

mksquashfs \
    "$ROOTFS_PATH" \
    "$LIVE_BOOT_LIVE_PATH/filesystem.squashfs" \
    -e boot \
    -noappend \
    -comp xz \
    -b 1M \
    -Xdict-size 1M \
    -Xbcj x86
    
# Copy Kernel to live
cp "$ROOTFS_PATH/boot"/vmlinuz-* \
    "$LIVE_BOOT_LIVE_PATH/vmlinuz" && \
cp "$ROOTFS_PATH/boot"/initrd.img-* \
    "$LIVE_BOOT_LIVE_PATH/initrd" && \
cp ./data/refind/refind_linux.conf \
    "$LIVE_BOOT_LIVE_PATH/refind_linux.conf"

# Generate bootable EFI Image from refind

dd if=/dev/zero of="$LIVE_BOOT_PATH/efiboot.img" bs=1M count=20
mkfs.msdos -F 16 "$LIVE_BOOT_PATH/efiboot.img"
for directory in $(find ./data/refind/EFI/ -type d | cut -d'/' -f4-)
do
    mmd -i "$LIVE_BOOT_PATH/efiboot.img" ::"$(echo $directory | tr '[:lower:]' '[:upper:]')"
done
    
for file in $(find ./data/refind/EFI/ -type f | cut -d'/' -f4-)
do
    mcopy -i "$LIVE_BOOT_PATH/efiboot.img" $file ::"$(echo $file | tr '[:lower:]' '[:upper:]')"
done

# Create Bootable UEFI Full Image
mkdir -p ./output

xorriso \
    -as mkisofs \
    -V $LIVE_BOOT_VOLUME_NAME \
    -e "$LIVE_BOOT_PATH/efiboot.img" \
    -no-emul-boot \
    -o "./output/$ISO_IMAGE" \
    "$LIVE_BOOT_DATA_PATH"