#!/bin/sh

VERSION=$1
ARCH=$2
OUTPUT=$3
NOFIRMWARE=$4

TEMP_DIR=$(mktemp -d)
SCRIPTDIR="$(dirname "$(realpath "$0")")"

APPEND_FIRMWARE="/rescue/firmware.img"
FILENAME="wmirescue_$ARCH.iso"

mkdir -p $TEMP_DIR/boot/bios/i386-pc
mkdir -p $TEMP_DIR/boot/bios/fonts
mkdir -p $TEMP_DIR/boot/efi
mkdir -p $TEMP_DIR/memtest
mkdir -p $TEMP_DIR/rescue/$ARCH

if [ "${NOFIRMWARE}" = "--nofirmware" ]; then
    APPEND_FIRMWARE=""
    FILENAME="wmirescue_$ARCH-nofirmware.iso"
else
    cp ${OUTPUT}/netboot/firmware.img $TEMP_DIR/rescue
fi

cp ${OUTPUT}/netboot/${ARCH}/vmlinuz $TEMP_DIR/rescue/$ARCH
cp ${OUTPUT}/netboot/${ARCH}/initrd.img $TEMP_DIR/rescue/$ARCH


#memtest

echo "Preparing memtest..."
echo

TEMP_DIR_MEMTEST=$(mktemp -d)

#BIOS
wget -q http://www.memtest.org/download/5.01/memtest86+-5.01.zip -P ${TEMP_DIR_MEMTEST}
unzip -q ${TEMP_DIR_MEMTEST}/memtest86+-5.01.zip -d ${TEMP_DIR_MEMTEST}
cp ${TEMP_DIR_MEMTEST}/memtest86+-5.01.bin "$TEMP_DIR/memtest/memtest.bin"

#EFI
mkdir ${TEMP_DIR_MEMTEST}/mountpoint
wget -q https://www.memtest86.com/downloads/memtest86-usb.zip -P ${TEMP_DIR_MEMTEST}
unzip -q ${TEMP_DIR_MEMTEST}/memtest86-usb.zip -d ${TEMP_DIR_MEMTEST}
losetup -o $((2048*512)) /dev/loop0 ${TEMP_DIR_MEMTEST}/memtest86-usb.img
mount /dev/loop0 ${TEMP_DIR_MEMTEST}/mountpoint
cp ${TEMP_DIR_MEMTEST}/mountpoint/EFI/BOOT/BOOTX64.efi "$TEMP_DIR/memtest/memtest86.efi"
umount ${TEMP_DIR_MEMTEST}/mountpoint
losetup -d /dev/loop0

rm -r "${TEMP_DIR_MEMTEST}"


#GRUB

echo
echo "Preparing GRUB..."
echo

TEMP_DIR_GRUB=$(mktemp -d)

#BIOS
cp ${SCRIPTDIR}/../media/black.png $TEMP_DIR/boot/
cp /usr/share/grub/unicode.pf2 $TEMP_DIR/boot/bios/fonts/

grub-mkimage -O i386-pc -p /boot/bios/ -o ${TEMP_DIR_GRUB}/core.img iso9660 biosdisk

#cp -r /usr/lib/grub/i386-pc/*  $TEMP_DIR/boot/bios/i386-pc
#rm $TEMP_DIR/boot/bios/i386-pc/*.img
for module in normal boot extcmd crypto terminal gettext bufio \
            linux video relocator mmap vbe video_fb \
            linux16 \
            gfxterm font gfxmenu trig bitmap_scale bitmap video_colors \
            png; do
    cp /usr/lib/grub/i386-pc/${module}.mod $TEMP_DIR/boot/bios/i386-pc
done;

cat /usr/lib/grub/i386-pc/cdboot.img ${TEMP_DIR_GRUB}/core.img > $TEMP_DIR/boot/bios/grub.img
cat /usr/lib/grub/i386-pc/boot.img ${TEMP_DIR_GRUB}/core.img > ${TEMP_DIR_GRUB}/embedded.img

#EFI
grub-mkimage -C xz -O x86_64-efi -p /boot/efi/ -o "${TEMP_DIR_GRUB}/bootx64.efi" linux chain iso9660 normal all_video gfxterm gfxmenu png
truncate -s $(($(stat --printf="%s" ${TEMP_DIR_GRUB}/bootx64.efi) + 24576)) ${TEMP_DIR_GRUB}/efi.img
mkfs.vfat ${TEMP_DIR_GRUB}/efi.img
mkdir ${TEMP_DIR_GRUB}/mountpoint
mount ${TEMP_DIR_GRUB}/efi.img ${TEMP_DIR_GRUB}/mountpoint/
mkdir -p ${TEMP_DIR_GRUB}/mountpoint/efi/boot
cp ${TEMP_DIR_GRUB}/bootx64.efi ${TEMP_DIR_GRUB}/mountpoint/efi/boot/
umount ${TEMP_DIR_GRUB}/mountpoint

#CONFIG
cat << EOF > $TEMP_DIR/boot/bios/grub.cfg
insmod linux
insmod linux16
loadfont unicode
insmod all_video
insmod gfxterm
terminal_output gfxterm

set timeout=30
insmod png
set theme="/boot/theme.txt"

menuentry "wmirescue-$ARCH" {
    linux /rescue/$ARCH/vmlinuz
    initrd /rescue/$ARCH/initrd.img $APPEND_FIRMWARE
}

menuentry "wmirescue-$ARCH-serial" {
    linux /rescue/$ARCH/vmlinuz console=ttyS0,115200n8
    initrd /rescue/$ARCH/initrd.img $APPEND_FIRMWARE
}

menuentry "memtest" {
  linux16 /memtest/memtest.bin
}
EOF

cat << EOF > $TEMP_DIR/boot/efi/grub.cfg
loadfont unicode
insmod gfxterm
terminal_output gfxterm

set timeout=30
insmod png
set theme="/boot/theme.txt"

menuentry "wmirescue-$ARCH" {
    linux /rescue/$ARCH/vmlinuz
    initrd /rescue/$ARCH/initrd.img $APPEND_FIRMWARE
}

menuentry "wmirescue-$ARCH-serial" {
    linux /rescue/$ARCH/vmlinuz console=ttyS0,115200n8
    initrd /rescue/$ARCH/initrd.img $APPEND_FIRMWARE
}

menuentry "memtest" {
  chainloader /memtest/memtest86.efi
}
EOF

cat << EOF > $TEMP_DIR/boot/theme.txt
title-text: ""
desktop-color: "#000000"
desktop-image: "black.png"
terminal-left: "0"
terminal-top: "0"
terminal-width: "100%"
terminal-height: "100%"
terminal-border: "0"

+ label {
    text = "WMI Rescue $VERSION"
    left = 0%
    top = 5%
    width = 100%
    align = "center"
    color = "#fff" }
+ label {
    text = "Booting in %d seconds"
    left = 0%
    top = 5%+24
    width = 100%
    align = "center"
    id = "__timeout__"
    color = "#999" }
+ boot_menu {
    left = 7%
    top = 15%
    width = 100%
    item_height = 24
    item_spacing = 0
    item_padding = 0
    item_icon_space = 0
    icon_width = 0
    item_color = "#999"
    selected_item_color = "#fff" }
+ label {
    text = "Serial console parameters: baud rate: 115200, parity: no, bits: 8"
    left = 7%
    top = 95%-120
    width = 100%
    color = "#999" }
+ label {
    text = "https://rescue.wmi.amu.edu.pl/"
    left = 7%
    top = 95%-72
    width = 100%
    color = "#999" }
+ label {
    text = "Copyright (C) by Mateusz Hromada <ruanda@ruanda.pl>"
    left = 7%
    top = 95%-48
    width = 100%
    color = "#999" }
+ label {
    text = "Copyright (C) by Tomasz Zaworski <zawoor@wmi.amu.edu.pl.pl>"
    left = 7%
    top = 95%-24
    width = 100%
    color = "#999" }
EOF

echo
echo "Generating iso..."
echo

xorriso -as mkisofs \
  -quiet \
  -b boot/bios/grub.img \
  -no-emul-boot \
  -boot-load-size 4 \
  -boot-info-table \
  --embedded-boot ${TEMP_DIR_GRUB}/embedded.img \
  -eltorito-alt-boot \
  -e "--interval:appended_partition_2:all::" \
  -no-emul-boot \
  -isohybrid-gpt-basdat \
  -o "${OUTPUT}/${FILENAME}" \
  -append_partition 2 0xef ${TEMP_DIR_GRUB}/efi.img \
  -partition_cyl_align all \
  -partition_offset 16 \
  -iso_mbr_part_type 0x83 \
  "$TEMP_DIR"

rm -rf "${TEMP_DIR}"
rm -rf "${TEMP_DIR_GRUB}"