#!/bin/bash

set -e

SCRIPT_URL="https://git.zakscode.com/ztimson/fallback-ap/raw/branch/master/fallback-ap.sh"
INSTALL_PATH="/usr/local/bin/fallback-ap"

if [ "$EUID" -ne 0 ]; then
    echo "This installer needs to run as root, e.g.:"
    echo "  curl -sL https://git.zakscode.com/ztimson/fallback-ap/raw/branch/master/install.sh | sudo bash"
    exit 1
fi

prompt() {
    local __var="$1" __question="$2" __default="$3" __answer=""
    if [ -e /dev/tty ]; then
        read -r -p "$__question [$__default]: " __answer < /dev/tty || __answer=""
    fi
    printf -v "$__var" '%s' "${__answer:-$__default}"
}

[ -z "${FALLBACK_AP_SSID:-}" ]              && prompt FALLBACK_AP_SSID "Access point SSID" "$(hostname)"
[ -z "${FALLBACK_AP_PASSWORD:-}" ]          && prompt FALLBACK_AP_PASSWORD "Access point passphrase" "abc123"
[ -z "${FALLBACK_AP_CIDR:-}" ]              && prompt FALLBACK_AP_CIDR "Access point subnet (CIDR)" "10.10.10.1/24"
[ -z "${FALLBACK_AP_DHCP_START_OCTET:-}" ]  && prompt FALLBACK_AP_DHCP_START_OCTET "DHCP range start (last octet)" "100"
[ -z "${FALLBACK_AP_DHCP_END_OCTET:-}" ]    && prompt FALLBACK_AP_DHCP_END_OCTET "DHCP range end (last octet)" "250"

export FALLBACK_AP_SSID FALLBACK_AP_PASSWORD FALLBACK_AP_CIDR FALLBACK_AP_DHCP_START_OCTET FALLBACK_AP_DHCP_END_OCTET

echo "Downloading fallback-ap..."
curl -fsSL "$SCRIPT_URL" -o "$INSTALL_PATH"
chmod +x "$INSTALL_PATH"
echo "Running installer..."
"$INSTALL_PATH" install