#!/bin/bash

# Pre-installation script - check nginx is available
set -e

if ! command -v dpkg >/dev/null 2>&1; then
    echo "dpkg not found." >&2
    exit 1
fi

if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ]; then
    # Verify nginx is installed before proceeding
    if ! command -v nginx >/dev/null 2>&1; then
        echo "nginx is required for nginx-mod-rewrite." >&2
        exit 1
    fi

    # Check nginx module configuration directory exists
    if [ ! -d /etc/nginx/modules ]; then
        mkdir -p /etc/nginx/modules || true
    fi
fi

exit 0