#!/bin/bash

. /etc/shlib

include parse
include common
include pretty


MIN_DISK_SPACE="${MIN_DISK_SPACE:-300M}"
## convert human size to bytes using numfmt

## Check remaining disk space
if [ -n "$MIN_DISK_SPACE" ]; then
    min_disk_space_kbytes=$(numfmt --from=iec --to-unit=1024 "$MIN_DISK_SPACE") || {
        err "Invalid format for '\$MIN_DISK_SPACE'."
        exit 1
    }
    if ! remaining_kbytes=$(df / | awk 'NR==2 {print $4}'); then
        err "Failed to get remaining disk space."
        exit 1
    fi

    if [ "$remaining_kbytes" -lt "$min_disk_space_kbytes" ]; then
        err "Not enough disk space."
        human_min_dist_space=$(numfmt --to=iec --format="%.2f" --from-unit=1024 "$min_disk_space_kbytes") || {
            err "Failed to convert '\$MIN_DISK_SPACE' to human readable format."
            exit 1
        }
        human_remaining_kbytes=$(numfmt --to=iec --format="%.2f" --from-unit=1024 "$remaining_kbytes") || {
            err "Failed to convert '\$remaining_kbytes' to human readable format."
            exit 1
        }
        echo "  - At least $human_min_dist_space are required." >&2
        echo "  - Only $human_remaining_kbytes are available." >&2
        exit 1
    fi
fi


start=$SECONDS

if [ -z "$NO_UPDATE" -a -d "/opt/apps/myc-manage" ]; then
    MYC_UPDATE_VERSION="${MYC_UPDATE_VERSION:-master}"
    Elt "Checking if myc-manage requires update..."
    cd /opt/apps/myc-manage
    REMOTE_HEAD="$(git ls-remote origin "refs/heads/${MYC_UPDATE_VERSION}" 2>/dev/null | cut -f 1)"
    if [ -z "$REMOTE_HEAD" ]; then
        err "Can't find remote branch '$MYC_UPDATE_VERSION'."
        echo "  - Either this branch is not available on 'origin' remote." >&2
        echo "  - Either 'origin' remote is not correctly set." >&2
        exit 1
    fi
    HEAD="$(git rev-parse HEAD)"
    if [ "$REMOTE_HEAD" != "$HEAD" ]; then
        print_info "new version available"
        Wrap -d "Update myc-manage" <<EOF || exit 1
if ! [ -d "/opt/apps/myc-manage" ]; then
    mkdir -p /opt/apps && cd /opt/apps
    git clone https://git.myceliandre.fr/Myceliandre/myc-manage.git -b "$MYC_UPDATE_VERSION"
else
    cd /opt/apps/myc-manage &&
    git checkout "$MYC_UPDATE_VERSION" &&
    git pull -r || exit 1
fi

ln -sfn /opt/apps/myc-manage/bin/* /usr/local/sbin/
find -L /usr/local/sbin -maxdepth 1 -type l -ilname /opt/apps/myc-manage/bin/\* -delete
EOF

        Feed || exit 1
        export NO_UPDATE=1
        exec myc-update
        exit 0
    else
        print_info "up to date"
        Feedback noop
    fi
fi


Wrap -d "Updating 0k-charms" <<EOF || exit 1
cd /opt/apps/0k-charms
git pull -r
EOF

charm --debug apply docker-host || exit 1

## there seem to be an error now within compose when trying to download let's encrypt image.
Wrap -d "Updating some docker images" <<EOF || exit 1
docker pull docker.0k.io/letsencrypt
EOF

Wrap -d "Updating cron scripts" <<EOF || exit 1
for d in /etc/cron.{d,daily,hourly,monthly,weekly}; do
    ln -sfn "/opt/apps/myc-manage\$d/"* "\$d/" &&
    find -L "\$d" -maxdepth 1 -type l -ilname "/opt/apps/myc-manage\$d/"\* -delete
done
EOF

Wrap -d "Updating sysctl scripts" <<EOF || exit 1
for d in /etc/sysctl.d; do
    ln -sfn "/opt/apps/myc-manage\$d/"* "\$d/" &&
    find -L "\$d" -maxdepth 1 -type l -ilname "/opt/apps/myc-manage\$d/"\* -delete
done
EOF

if [ -f "/root/.bashrc" ]; then
    Wrap -d "Enable colors in bash" <<'EOF' || exit 1
sed -ri 's/^# (export LS_OPTIONS=.--color=auto.)/\1/;
         s/^# (eval "`dircolors`")/\1/;
         s/^# (alias ls='"'ls \\\$LS_OPTIONS'"')/\1/' /root/.bashrc
EOF
fi


for keyfile in {/root,/home/debian}/.ssh/authorized_keys; do
    [ -e "$keyfile" ] || continue
    sed -ri 's%^ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDri3GHzDt0Il0jv6zLjwkge48dN9tv11sqVNnKoDeUxzk4kn7Ng5ldd3p6dYL6Pa5NDqJUAhO/d/q08IWuwfEbtj8Yc/EkahcRwVD2imPceUeDgyCaOJhq7WO4c9d9yG8PnRO2\+Zk92a9L5vuELVLr4UHIQOs2/eFRY2/ODV8ebf5L1issGzfLd/IPhX5oJwMwKfqIFOP7KPQ26duHNRq4bYOD9ePW4shfxmyQDk6dSImFat05ErT\+X7703PcPx/PX2AIqqz95zqM6M26BywAohuaD5joxKgkd/mMIJylvT8GEYDlcLMHwnM7LtwtyJ1O9dkVpsibIqGy20KlAOGPf admin@0k$%ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIMV3USt/BLnXnUk7rk8v42mISZaXBZuULbh2vx2Amk7k admin@old0kreplacement%g' "$keyfile"
done

printf "Update finished ${GREEN}successfully${NORMAL} ${GRAY}(in %.2fs)${NORMAL}.\n" "$((SECONDS - start))"