#!/bin/sh

## hyphop ##

#= oowow-dump2xz

#: USAGE mkdir FOO && cd FOO && [OSVER=] [VER=] [LABEL=] [OUT=] [BOOT=] owow-dump2xz

lowcase(){ echo "$@" | tr '[:upper:]' '[:lower:]' ; }
upcase(){ echo "$@" | tr '[:lower:]' '[:upper:]' ; }
CMD(){ echo "# $@" >&2 ; "$@" ;}
DIE(){ echo "! $@" >&2 ; exit 1;}

REMOTE=${REMOTE:-172.22.1.1}
XZE=https://raw.githubusercontent.com/hyphop/khadas-rescue-tools/master/scripts/xze
XZE=http://docs.khadas.com/_export/code/scripts/xze?codeblock=0

for D in *-dump.img.zst; do
    O=${D%.*}
    CMD zstd -d "$D" || CMD rm "$O"
done

for D in *-dump.img; do
    [ -s "$D" ] && break
    D=
done

[ "$D" ] || { # DUMP begin
echo DUMP data ...
ping -q -c1 $REMOTE || DIE "cant reach $REMOTE host"
BOARD=$(ssh root@$REMOTE /opt/board_name 2>/dev/null )
echo "BOARD: $BOARD"
[ "BOARD" ] || DIE "BOARD undetected"

boot=boot0
[ "$BOOT" ] && {
echo copy boot area
ssh root@$REMOTE cat /dev/mmcblk?boot0 > $boot
ls -l1 $boot
}

T=$BOARD.sfdisk
ssh root@$REMOTE sfdisk --dump \$\(/opt/mmc_disk\)>$T # | tee $T
echo --
USER_DATA=userdata
grep $USER_DATA $T | while read a b c d e; do
[ "$d" ] || DIE "partition $USER_DATA not found"
echo $d - $e
echo ${d%,*} > $T.userdata
done
read USER_START < $T.userdata
BS=512
BYTES=${BYTES:-$((USER_START*BS))}
board=${board-$(lowcase $BOARD)}
DUMP=$BOARD-emmc-dump.img
echo "Dump image from $BOARD > $DUMP $BYTES bytes ...wait..."
CMD curl -L "$REMOTE"/api/disk/rdz/mmc.zst:$((BYTES)) -o$DUMP.zst
CMD zstd -d $DUMP.zst
D=$DUMP
} # DUMP end

BOARD=${D%%-*}
board=${board-$(lowcase $BOARD)}
LABEL=${LABEL:-Android}
label=${label:-$(lowcase $LABEL)}
OSVER=${OSVER:-14}
VER=${VER:-v240820}
OUT=${OUT:-$board-$label-$OSVER-$VER.raw.img}

echo "CONVERT $D to $OUT ..."

[ -e "$OUT" ] && DIE "image $OUT already exist"

CMD truncate -s+50M "$D"
CMD mv "$D" "$OUT"

bootloader(){
    [ "$BOOT" ] || return 0
    boot=${boot:-boot0}
    echo "BOOT LOADER '$boot' inject to image...">&2
    BOOT_OFFSET=$(du -b "$OUT")
    BOOT_SIZE=$(du -b "$boot")
    echo "copy boot area $boot to $OUT by $BOOT_OFFSET + $BOOT_SIZE">&2
    gzip -c $boot >> "$OUT"
    echo bootloader=$BOOT_OFFSET
}

xze=$(which xze)
xze=${xze:-./xze}
[ -s "$xze" ] || curl "$XZE" -o"$xze"

CMD sh $xze "$OUT" \
    --meta \
    label="$LABEL" \
    builder="Khadas" \
    date="$(TZ=GMT+0 date)" \
    match=BOARD=$BOARD \
    $(bootloader) \
    duration=90 \
    desc="$BOARD $LABEL $OSVER $VER"