#!/bin/sh

default_location="/usr/bin/nym-mixnode"
default_user="nym"
default_group="nym"

if [ -f "/tmp/nym_mixnode_preinst_marker" ]; then
    backup_path=$(cat /tmp/nym_mixnode_preinst_marker)
    echo "Upgrade detected. Previous version backed up at $backup_path"

    existing_location=$(dirname "$backup_path" | sed 's/\.backup\..*//')
    echo "Existing location: ${existing_location}"

    if [ "$existing_location" != "$default_location" ]; then
        echo "Custom installation location detected: $existing_location"

        mv "$default_location" "$existing_location/nym-mixnode"

        original_user=$(stat -c "%U" "$backup_path")
        original_group=$(stat -c "%G" "$backup_path")
        original_perms=$(stat -c "%a" "$backup_path")

        chown "$original_user:$original_group" "$existing_location/nym-mixnode"
        chmod "$original_perms" "$existing_location/nym-mixnode"
    fi

    rm -f /tmp/nym_mixnode_preinst_marker
else
    echo "Fresh installation detected."

    if [ -f "$default_location" ]; then
        # Leave the binary as the  user to perform the apt install
        # It's down to the user to specify the correct ownership and permissions
        chmod 755 "$default_location"

        echo "Installation complete. Please configure and start the nym-mixnode process manually."
        echo "Refer to https://nymtech.net/operators/nodes/mixnode-setup.html"
        echo "Example for setting up the nym-mixnode service:"
        echo

        cat <<EOF
[Unit]
Description=Nym mixnode
After=network-online.target

[Service]
ExecStart=$default_location run --id nym-mixnode
User=$default_user

[Install]
WantedBy=multi-user.target
EOF
    else
        echo "Error: the new binary $default_location does not exist."
    fi
fi

echo
echo "Consider restarting the nym-mixnode service if it is already enabled."
echo "systemctl restart nym-mixnode.service"

exit 0

#DEBHELPER#