#! /usr/bin/env dash

# shellcheck source=/dev/null
SHELL_LIBRARY_VERSION="1.1.4" . %SHELL_LIBRARY_PATH

mne() {
    mount --mkdir --options compress-force=zstd:15,subvol="$1" "$DISK_ROOT" "$2" || dien "Mounting of $1";
}


available_disks="$(mktmp)";
lsblk -J | jq '.[] | map(.name) | [foreach .[] as $item ({item: null, index: -1}; {$item, index: (.index + 1)})]' > "$available_disks";


[ "$(jq '.[]' "$available_disks" | wc -l)" -eq 0 ] && die "No disks found"
msg "Select where your system is installed:\n"

i=9999; # nobody will have so many disks attached

while ! jq -e --argjson i "$i" '.[$i]' "$available_disks" > /dev/null 2>&1; do
    for disk in $(jq -c '.[]' "$available_disks" ); do
        printf "%4s) %s \n" "$(echo "$disk" | jq '.index')" "$(echo "$disk" | jq '.item' | tr -d "\"")";
    done
    printf "%4s) Exit\n" "q"
    readp  "Enter a option: " disk

    if [ $disk = "q" ];then
        exit 1
    else
        i="$disk"
    fi
    if jq -e --argjson i "$i" 'nth($i)' "$available_disks"  > /dev/null 2>&1; then
        disk="$(jq -e --argjson i "$i" 'nth($i) | .item' "$available_disks" | tr -d "\"")";
    else
        warning "No disk selected. Select a disk to continue.\n"
    fi
done

case "$disk" in
    "nvme"*)
        export DISK_EFI="/dev/${disk}"p1
        export DISK_ROOT="/dev/${disk}"p2
        ;;
    "sd"* |"vd"*)
        export DISK_EFI="/dev/${disk}"1
        export DISK_ROOT="/dev/${disk}"2
        ;;
    *)
        die "The disk type: ${disk} is not yet supported!"
        ;;
esac

msg "Mounting..."
# TODO umount -R /mnt
mount -t tmpfs none /mnt
mount --mkdir "$DISK_EFI" /mnt/boot

mne nix-store /mnt/nix
mne persistent-storage /mnt/srv

mount --mkdir --options bind /mnt/srv/nixos-config /mnt/etc/nixos

msg "Finished mounting"
readp "Do you want to continue with nixos-install? [N/y]: " result
case $result in
    [Yy])
        nix run "git+https://codeberg.org/soispha/nixos-config#setup" --experimental-features 'nix-command flakes';
        ;;
    *)
        msg "Sure, do it yourself"
        exit 1
        ;;
esac

# vim: ft=sh