#!/bin/bash

#######
### Update NGINX configuration '<tags>' with proper values and optionally copy
### to updated directory structure
#######


### text formatting ansi codes
err="\e[1;31m"
ok="\e[1;32m"
warn="\e[93m"
mag="\e[95m"
cyan="\e[96m"
norm="\e[0m"


### set variables

# clear all variables
unset detectedIP
unset inputIP
unset IP4
unset inputServerName
serverNames_working=()
serverNames=()
unset useSSL
unset useCertbot
unset inputCertbotDomain
certbotBadFile=()
unset CertbotDomain
certbotFiles=()
unset inputCertPath
unset inputKeyPath
unset inputCAChainPath
unset CertPath
unset KeyPath
unset CAChainPath
unset noOSCP
unset inputDHPath
unset generateDH
unset DHPath
unset usePHP
unset inputPHPType
unset phpType
unset inputPHPAddr
unset inputPHPPort
unset phpAddr
unset phpPort
unset phpSock
unset dhsuccess
unset disableDHParam
unset copysuccess

# set variables
regexIP4="(([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])\.){3}([0-9]|[1-9][0-9]|1[0-9]{2}|2[0-4][0-9]|25[0-5])"
regexIP6="(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))"
regexHostname="(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\-]*[a-zA-Z0-9])\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\-]*[A-Za-z0-9])"
detectedIP=$(ip route get 1 | sed -n 's/^.*src \([0-9.]*\) .*$/\1/p')
certbotFiles=(cert.pem chain.pem fullchain.pem privkey.pem)
hostname=$(hostname)
configPath="./etc.${hostname}"
useSSL=0
useCertbot=0
generateDH=0
noOSCP=0
disableDHParam=0

# set tags and files to update
tag_servernames="<server name(s)>"
file_servernames="nginx/snippets/server_names.conf"
tag_sslcert="<path/to/your_ssl_certificate_fullchain>"
tag_sslkey="<path/to/your_certificate_private_key.key>"
file_ssl="nginx/snippets/ssl/ssl_certs.conf"
tag_dhparam="<path/to/your_dhparam.pem>"
tag_cachain="<path/to/your_CA_bundle.crt>"
file_mozmodern="nginx/conf.d/mozModern_ssl.conf"
tag_lanip="<lanIP>"
file_lanip="nginx/nginx.conf"
file_buffers="nginx/conf.d/buffers.conf"
file_buffersPHP="nginx/conf.d/buffers_conf_php.insert"
tag_phphandler="#<insert PHP handler.*>$"
file_phphandler="nginx/nginx.conf"
file_phpTCP="nginx/nginx_conf_phphandler_TCP.insert"
file_phpSock="nginx/nginx_conf_phphandler_SOCK.insert"
tag_phpAddr="<phpAddr>"
tag_phpPort="<phpPort>"
tag_phpSock="<phpSock>"



### check running as root, otherwise exit
if [ $(id -u) -ne 0 ]; then
    echo -e "\n${err}This script MUST be run as ROOT. Exiting.${norm}"
    exit 2
fi


### quick intro for the user
echo -e "\n${mag}This script will customize the provided NGINX template files for your"
echo "environment.  You will be prompted for all necessary information.  After that,"
echo "default error pages will be copied to your webroot and your NGINX configuration"
echo -e "directory structure will be customized.${norm}\n"
echo -e "${warn}You may accept the default option (listed in brackets) by simply"
echo "pressing ENTER (i.e. no answer)."
echo -e "You may exit this script at any prompt by typing 'X'${norm}\n"


### get local IP address
echo -e "\n${mag}In cases where this server will be acting as a (reverse) proxy, NGINX"
echo "needs to know it's own local IP address so that the logs can properly reflect"
echo -e "the IP of the remote system(s) instead of this server.${norm}\n"
while true; do
    read -p "What is this machine's local IP4 address? (${detectedIP}) " inputIP
    case "${inputIP}" in
        '')
            IP4="${detectedIP}"
            break
            ;;
        [Xx]*)
            echo -e "\n${cyan}---exiting---\n${norm}"
            exit 1
            ;;
        *)
            # check IP for validity
            if [[ "${inputIP}" =~ ^${regexIP4}$ ]]; then
                IP4="${inputIP}"
                break
            else
                echo -e "\n${err}Invalid IP4 format (xxx.xxx.xxx.xxx)${norm}"
            fi
            ;;
    esac
done


### get server names for this installation
echo -e "\n${mag}To which hostnames should NGINX answer?  You can pick as many hostnames as you"
echo "like.  Please ensure you provide fully-qualified domain names unless you"
echo "understand the impact of not doing so."
echo -e "\nIf you are setting up SSL on this system make sure the hostnames match what"
echo "appears on your certificates!"
echo -e "\n${warn}You will be prompted to enter one hostname at a time."
echo "Provide a blank-entry (hit enter) when you're done."
echo -e "'X' will exit the script, as always${norm}\n"
while true; do
    read -p "Hostname for this server? " inputServerName
    case "${inputServerName}" in
        '')
            # check that at least one name as been provided
            if [ -z "${serverNames_working}" ]; then
                echo -e "\n${err}You must provide at least one hostname${norm}"
            else
                break
            fi
            ;;
        [Xx]*)
            echo -e "\n${cyan}---exiting---\n${norm}"
            exit 1
            ;;
        *)
            # check hostname for validity
            if [[ ! "${inputServerName}" =~ ^${regexHostname}$ ]]; then
                echo -e "\n${err}Invalid hostname${norm}"
            else
                serverNames_working+=("${inputServerName}")
            fi
            ;;
    esac
done
# create new array with unqiue values only
declare -A uniqueSN
for name in "${serverNames_working[@]}"; do
    uniqueSN["${name}"]=""
done
for sn in "${!uniqueSN[@]}"; do
    serverNames+=("${sn}")
done


### SSL related options
# enable SSL?
while true; do
    read -p "Do you want to enable SSL on this server? (default: Yes) " yn
    case "${yn}" in
        [Yy]*|'')
            useSSL=1
            break
            ;;
        [Nn]*)
            useSSL=0
            break
            ;;
        [Xx]*)
            echo -e "\n${cyan}---exiting---\n${norm}"
            exit 1
            ;;
        *)
            echo -e "\n${err}Please answer (Y)es, (N)o, e(X)it or accept default${norm}"
            ;;
    esac
done

# using certbot?
if [ "${useSSL}" -eq 1 ]; then
    echo -e "\n${mag}If you are using Certbot, you only need to provide the primary domain name"
    echo "of your certificate and the script will auto-generate the paths NGINX needs to"
    echo "make everything work."
    echo -e "\nIf you haven't run Certbot yet, you can enter the domain you intend to use"
    echo "as your primary domain and the paths generated by this script will work after"
    echo -e "you run Certbot.  In that case, you will have to answer ${warn}'yes'${mag} when asked"
    echo -e "${warn}'Do you want to use this domain setting anyways?'"
    echo -e "\nNote: NGINX will NOT work until you run Certbot to generate your certificates!${norm}\n"
    while true; do
        read -p "Are you using Certbot to handle your SSL certificates? (default: No) " yn
        case "${yn}" in
            [Yy]*)
                useCertbot=1
                break
                ;;
            [Nn]*|'')
                useCertbot=0
                unset CertbotDomain
                break
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            *)
                echo -e "\n${err}Please answer (Y)es, (N)o, e(X)it or accept default${norm}"
                ;;
        esac
    done
fi

# using Certbot: get primary domain name since that how Certbot determines paths
if [ "${useCertbot}" -eq 1 ]; then
    while true; do
        read -p "What is the primary domain for your Certbot Certificates? " inputCertbotDomain
        case "${inputCertbotDomain}" in
            '')
                echo -e "\n${err}You cannot have an empty domain name${norm}"
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            *)
                # check hostname for validity
                if [[ ! "${inputCertbotDomain}" =~ ^${regexHostname}$ ]]; then
                    echo -e "\n${err}Invalid hostname${norm}"
                else
                    # check if Certbot files exist in path implied from hostname
                    echo -e "\n${cyan}Verifying Certbot files..."
                    echo -e "(/etc/letsencrypt/live/${inputCertbotDomain}/...)${norm}"
                    certbotBadFile=()
                    for certbotFile in "${certbotFiles[@]}"; do
                        if [ -f "/etc/letsencrypt/live/${inputCertbotDomain}/$certbotFile" ]; then
                            echo -e "File: ${certbotFile} -- ${ok}OK${norm}"
                        else
                            echo -e "File: ${certbotFile} -- ${err}X${norm}"
                            certbotBadFile+=("${certbotFile}")
                        fi
                    done
                    if [ -z "${certbotBadFile}" ]; then
                        echo -e "${cyan}Certbot files seem intact${norm}\n"
                        CertbotDomain="${inputCertbotDomain}"
                        break
                    else
                        echo -e "\n${err}The following files are missing from ${inputCertbotDomain}:"
                        echo -e "${warn}${certbotBadFile[*]}${norm}"
                        echo -e "${err}These files should all be present in a functional Certbot install.${norm}\n"
                        while true; do
                            read -p "Do you want to use this domain setting anyways? " yn
                            case "${yn}" in
                                    [Yy]*)
                                        CertbotDomain="${inputCertbotDomain}"
                                        break
                                        ;;
                                    [Nn]*)
                                        break
                                        ;;
                                    *)
                                        ;;
                            esac
                        done
                    fi
                    if [ -n "${CertbotDomain}" ]; then
                        break
                    fi
                fi
                ;;
        esac
    done
fi

# Generate paths from CertbotDomain
if [ -n "${CertbotDomain}" ]; then
    CertPath="/etc/letsencrypt/live/${CertbotDomain}/fullchain.pem"
    KeyPath="/etc/letsencrypt/live/${CertbotDomain}/privkey.pem"
    CAChainPath="/etc/letsencrypt/live/${CertbotDomain}/chain.pem"
fi

# only process manual certificate paths if using SSL and NOT using Certbot
if [ "${useSSL}" -eq 1 ] && [ "${useCertbot}" -eq 0 ]; then
    echo -e "\n${mag}NGINX requires the full paths to your PEM formatted certificate and"
    echo "private key in order to serve pages securely and properly over SSL."
    echo "If you haven't generated/copied your certificates yet, you can enter the"
    echo "paths where they will be located and confirm when prompted by the script."
    echo -e "${warn}NGINX will NOT work until these files are actually copied!${norm}\n"
    # not using Certbot: get location of certificate
    while true; do
        read -p "What is the path to your primary SSL certificate? " inputCertPath
        case "${inputCertPath}" in
            '')
                echo -e "\n${err}You cannot have an empty path to your SSL certificate${norm}"
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            /*)
                # validate path
                if [ -f "${inputCertPath}" ]; then
                    CertPath="${inputCertPath}"
                    break
                else
                    echo -e "\n${warn}The file you specified doesn't exist${norm}"
                    while true; do
                        read -p "Do you want to use this path anyways? " yn
                        case $yn in
                            [Yy]*)
                                CertPath="${inputCertPath}"
                                break
                                ;;
                            [Nn]*)
                                break
                                ;;
                            *)
                                ;;
                        esac
                    done
                    if [ -n "${CertPath}" ]; then
                        break
                    fi
                fi
                ;;
            *)
                # path must be absolute and start with a slash
                echo -e "\n${err}Path must be absolute not relative. Please re-enter starting with '/'${norm}"
                ;;
        esac
    done

    # not using Certbot: get location of private key
    while true; do
        read -p "What is the path to your primary SSL private key? " inputKeyPath
        case "${inputKeyPath}" in
            '')
                echo -e "\n${err}You cannot have an empty path to your SSL private key${norm}"
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            /*)
                # validate path
                if [ -f "${inputKeyPath}" ]; then
                    KeyPath="${inputKeyPath}"
                    break
                else
                    echo -e "\n${warn}The file you specified doesn't exist${norm}"
                    while true; do
                        read -p "Do you want to use this path anyways? " yn
                        case $yn in
                            [Yy]*)
                                KeyPath="${inputKeyPath}"
                                break
                                ;;
                            [Nn]*)
                                break
                                ;;
                            *)
                                ;;
                        esac
                    done
                    if [ -n "${KeyPath}" ]; then
                        break
                    fi
                fi
                ;;
            *)
                # path must be absolute and start with a slash
                echo -e "\n${err}Path must be absolute not relative. Please re-enter starting with '/'${norm}"
                ;;                
        esac
    done

    # not using Certbot: get location of CA Certificate Chain
    echo -e "\n${mag}Your full Certificate Authority certificate-chain (root and any/all"
    echo "intermediate certificates bundled in one file) is required if you want NGINX"
    echo "to provide OSCP stapling for your visitors.  In most cases, you want this."
    echo "If you don't have your CA chain, you can fill in the filename you'll be saving"
    echo "it as in the future and confirm it when the script prompts you.  In that"
    echo -e "case, however, ${warn}NGINX will not work until that file actually exists.${mag}"
    echo -e "\nIf you are using a self-signed certificate or do not want OSCP stapling, leave"
    echo -e "this blank ${warn}(hit enter)${mag} and the relevant configuration section will be disabled.${norm}\n"
    while true; do
        read -p "What is the path to your primary SSL CA Chain certificate? " inputCAChainPath
        case "${inputCAChainPath}" in
            '')
                noOSCP=1
                break
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            /*)
                # validate path
                if [ -f "${inputCAChainPath}" ]; then
                    CAChainPath="${inputCAChainPath}"
                    break
                else
                    echo -e "\n${warn}The file you specified doesn't exist${norm}"
                    while true; do
                        read -p "Do you want to use this path anyways? " yn
                        case $yn in
                            [Yy]*)
                                CAChainPath="${inputCAChainPath}"
                                break
                                ;;
                            [Nn]*)
                                break
                                ;;
                            *)
                                ;;
                        esac
                    done
                    if [ -n "${CAChainPath}" ]; then
                        break
                    fi
                fi
                ;;
            *)
                # path must be absolute and start with a slash
                echo -e "\n${err}Path must be absolute not relative. Please re-enter starting with '/'${norm}"
                ;;
        esac
    done
fi

# dhparam: get location of DH Parameters file
if [ "${useSSL}" -eq 1 ]; then
echo -e "\n${mag}Having your own unique Diffie-Hellman Parameters file makes your SSL"
echo "communication more secure by pre-generating safe large prime and generator"
echo "numbers.  You shouldn't use any pre-installed dhparam.pem files. You should"
echo "always generate your own."
echo -e "\nIf you haven't done that already and would like this script to do it for"
echo -e "you, please type ${warn}generate${mag} at the prompt instead of a path."
echo "Please note that although this process uses DSA-primes to speed things up"
echo "without sacrificing security, the process may still take up to 20+ minutes"
echo -e "depending on your hardware.${norm}\n"
while true; do
    read -p "What is the path to your DH Parameters file? (default: /etc/ssl/certs/dhparam.pem) " inputDHPath
    case "${inputDHPath}" in
        '')
            # verify default path exists
            inputDHPath="/etc/ssl/certs/dhparam.pem"            
            if [ -f "${inputDHPath}" ]; then
                DHPath="${inputDHPath}"
                break
            else
                echo -e "\n${warn}The file you specified doesn't exist${norm}"
                while true; do
                    read -p "Do you want to use this path anyways? " yn
                    case $yn in
                        [Yy]*)
                            DHPath="${inputDHPath}"
                            break
                            ;;
                        [Nn]*)
                            break
                            ;;
                        *)
                            ;;
                    esac
                done
                if [ -n "${DHPath}" ]; then
                    break
                fi
            fi
            ;;
        [Xx]*)
            echo -e "\n${cyan}---exiting---\n${norm}"
            exit 1
            ;;
        [Gg][Ee][Nn][Ee][Rr][Aa][Tt][Ee]*)
            generateDH=1
            break
            ;;
        /*)
            # validate path
            if [ -f "${inputDHPath}" ]; then
                DHPath="${inputDHPath}"
                break
            else
                echo -e "\n${warn}The file you specified doesn't exist${norm}"
                while true; do
                    read -p "Do you want to use this path anyways? " yn
                    case $yn in
                        [Yy]*)
                            DHPath="${inputDHPath}"
                            break
                            ;;
                        [Nn]*)
                            break
                            ;;
                        *)
                            ;;
                    esac
                done
                if [ -n "${DHPath}" ]; then
                    break
                fi
            fi
            ;;
        *)
            # path must be absolute and start with a slash
            echo -e "\n${err}Path must be absolute not relative. Please re-enter starting with '/'${norm}"
            ;;
    esac
done
fi


### PHP-FPM related options
# get PHP-FPM usage status
echo -e "\n${mag}PHP-FPM allows your server to process and serve dynamic PHP content. If you"
echo "have PHP-FPM installed, NGINX needs to know how to access it. The following"
echo "questions will allow the script to auto-configure that for you."
echo -e "\nIf you have not yet installed PHP-FPM but intend to do so in the future, you"
echo -e "can answer ${warn}yes${mag} and provide details for your intended setup so the script can"
echo -e "generate a configuration that will work once your PHP-FPM is set up."
echo -e "${warn}Note: NGINX WILL STILL WORK if configured to use PHP-FPM but without PHP-FPM"
echo "actually installed.  However, it will throw 500/503 errors if you attempt"
echo -e "to serve PHP content.${norm}\n"
while true; do
    read -p "Are you using PHP-FPM? (default: Yes) " yn
    case $yn in
        [Yy]*|'')
            usePHP=1
            break
            ;;
        [Nn]*)
            usePHP=0
            break
            ;;
        [Xx]*)
            echo -e "\n${cyan}---exiting---\n${norm}"
            exit 1
            ;;
        *)
            echo -e "\n${err}Please answer (Y)es, (N)o, e(X)it or accept default${norm}"
            ;;
    esac
done

# get PHP-FPM TCP or Sockets configuration
if [ "${usePHP}" -eq 1 ]; then
    echo -e "\n${mag}PHP-FPM can be set up to respond to requests via TCP or via UNIX sockets."
    echo "If you have no idea what any of this means, then you're probably using the"
    echo -e "default setup which is sockets${norm}\n"
    while true; do
        read -p "Is your PHP-FPM set up to listen via 'TCP' or 'sockets'? (default: sockets) " inputPHPType
        case "${inputPHPType}" in
            [Ss][Oo][Cc][Kk][Ee][Tt][Ss]*|'')
                phpType='sockets'
                break
                ;;
            [Tt][Cc][Pp]*)
                phpType='tcp'
                break
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            *)
                echo -e "\n${err}Please enter either 'tcp' or 'sockets' or 'X' to exit script${norm}"
                ;;
        esac
    done
fi

# PHP-TCP: get address and port information
if [ "${phpType}" = "tcp" ]; then
    while true; do
        read -p "What IP address is PHP-FPM listening on? (default: 127.0.0.1) " inputPHPAddr
        case "${inputPHPAddr}" in
            '')
                phpAddr="127.0.0.1"
                break
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            *)
                # check basic format validity and wrap IP6 in [square brackets]
                if [[ "${inputPHPAddr}" =~ ^${regexIP6}$ ]]; then
                    phpAddr="[${inputPHPAddr}]"
                    break
                elif [[ "${inputPHPAddr}" =~ ^${regexIP4}$ ]]; then
                    phpAddr="${inputPHPAddr}"
                    break
                else
                    echo -e "\n${err}Invalid IP4/IP6 address format${norm}"
                fi
                ;;
        esac
    done
    while true; do
        read -p "What port is PHP-FPM listening on? (default: 9000) " inputPHPPort
        case "${inputPHPPort}" in
            '')
                phpPort=9000
                break
                ;;
            [Xx]*)
                echo -e "\n${cyan}---exiting---\n${norm}"
                exit 1
                ;;
            *)
                ## check port range validity
                # check for letters
                if [[ "${inputPHPPort}" =~ .*[a-zA-Z].* ]]; then
                    echo -e "\n${err}Port value must be numeric with no letters${norm}"
                elif [ ! "${inputPHPPort}" -ge 0 ] || [ ! "${inputPHPPort}" -le 65535 ]; then
                    echo -e "\n${err}Port must be between 0-65535${norm}"
                else
                    phpPort="${inputPHPPort}"
                    break
                fi
                ;;
        esac
    done
fi

# get PHP-FPM socket file from www.conf
if [ "${phpType}" = "sockets" ]; then
    phpSock=$(find /etc/php/ -name 'www.conf' -type f -exec grep 'listen.*sock$' {} + | sed 's/.*=\ //')
    # check if phpSock is null
    if [ -z "${phpSock}" ]; then
        echo -e "\n${err}Could not auto-detect socket file name${norm}"
        echo -e "PHP handler will be set up but you will have to edit ${warn}nginx.conf${norm}"
        echo "manually to include the proper socket-file name where you see"
        echo -e "${warn}<phpSocketFilename>${norm}"
        phpSock='<phpSocketFilename>'
    fi
fi


### notify user and generate DHParms if necessary
if [ "${generateDH}" -eq 1 ]; then
    echo -e "\n${mag}---------------------${norm}"
    echo -e "${cyan}Generating DH-Parameters file... this may take a while${norm}"
    # generate 4096-bit DHParams and store in /etc/ssl/certs/dhparam.pem
    openssl dhparam -dsaparam -out /etc/ssl/certs/dhparam.pem 4096
    dhsuccess=$?
    # verify no error reported and non-zero length file generated
    if [ "${dhsuccess}" -eq 0 ] && [ -s "/etc/ssl/certs/dhparam.pem" ]; then
        echo -e "${ok}-- dhparam.pem generated --${norm}"
        # set DHParam to proper location
        DHPath='/etc/ssl/certs/dhparam.pem'
    else
        echo -e "${err}-- error generating dhparam.pem --"
        echo -e "you should manually generate this file${norm}"
        echo -e "\n${warn}The relevant section of the NGINX configuration will be disabled${norm}\n"
        # set DHPath to default BUT set flag to comment ssl_dhparam in mozModern_ssl.conf
        DHPath='etc/ssl/certs/dhparam.pem'
        disableDHParam=1

    fi
fi

### Write configurations to template files
# let user know what's happening
echo -e "\n${mag}---------------------${norm}"
echo -e "${cyan}Updating template files now...${norm}"

# copy template files to working versions
echo "copying files to dedicated directory for customization:"
echo -e "${warn}${configPath}${norm}\n"
rm -rf "${configPath}"
cp -R ./etc "${configPath}"
copysuccess=$?
# check that copy was performed, else exit
if [ "${copysuccess}" -ne 0 ] || [ ! -d "${configPath}" ]; then
    echo -e "\n${err}There was a problem creating the configuration directory.${norm}"
    echo "Is there a reason ROOT cannot write to this script's directory?"
    echo -e "${err}No changes made. Exiting.${norm}"
    exit 100
fi

# process server_names snippet
echo -e "updating ${warn}${configPath}/${file_servernames}${norm}"
for name in "${serverNames[@]}"; do
    sed -i "/${tag_servernames}/a \   \ ${name}" "${configPath}/${file_servernames}"
done
sed -i "/${tag_servernames}/d" "${configPath}/${file_servernames}"

# process SSL snippet if using SSL
if [ "${useSSL}" -eq 1 ]; then
    echo -e "updating ${warn}${configPath}/${file_ssl}${norm}"
    sed -i -e "s%${tag_sslcert}%${CertPath}%" "${configPath}/${file_ssl}"
    sed -i -e "s%${tag_sslkey}%${KeyPath}%" "${configPath}/${file_ssl}"
fi

# process mozModern SSL configuration if using SSL
if [ "${useSSL}" -eq 1 ]; then
    echo -e "updating ${warn}${configPath}/${file_mozmodern}${norm}"
    sed -i -e "s%${tag_dhparam}%${DHPath}%" "${configPath}/${file_mozmodern}"
    sed -i -e "s%${tag_cachain}%${CAChainPath}%" "${configPath}/${file_mozmodern}"
    # comment OSCP lines if noOSCP=1
    if [ "${noOSCP}" -eq 1 ]; then
        sed -i 's/^ssl_stapling/#ssl_stapling/g' "${configPath}/${file_mozmodern}"
        sed -i 's/^ssl_trusted/#ssl_trusted/' "${configPath}/${file_mozmodern}"
    fi
    # comment ssl_dhparam line if error generating dhparam.pem
    if [ "${disableDHParam}" -eq 1 ]; then
        sed -i 's/^ssl_dhparam/#ssl_dhparam/' "${configPath}/${file_mozmodern}"
    fi
fi

# process LAN IP in nginx.conf
echo -e "updating ${warn}${configPath}/${file_lanip}${norm}"
sed -i "s/${tag_lanip}/${IP4}/" "${configPath}/${file_lanip}"

# if using PHP: process buffers.conf
if [ "${usePHP}" -eq 1 ]; then
    echo -e "updating ${warn}${configPath}/${file_buffers}${norm}"
    cat "${configPath}/${file_buffersPHP}" >> "${configPath}/${file_buffers}"
fi

## if using PHP-TCP: add upstream handler in nginx.conf
if [ "${phpType}" = "tcp" ]; then
    echo -e "updating ${warn}${configPath}/${file_phphandler}${norm}"
    # update .insert tags with address and port information
    sed -i "s/${tag_phpAddr}/${phpAddr}/" "${configPath}/${file_phpTCP}"
    sed -i "s/${tag_phpPort}/${phpPort}/" "${configPath}/${file_phpTCP}"
    # copy .insert file into nginx.conf
    sed -i -e "/${tag_phphandler}/{r ${configPath}/${file_phpTCP}" -e 'd}' "${configPath}/${file_phphandler}"
    # add index.php to default index files
    sed -i 's/^\s*index/\    index index.php/' "${configPath}/${file_phphandler}"
fi

# if using PHP-SOCK: add upstream handler in nginx.conf
if [ "${phpType}" = "sockets" ]; then
    echo -e "updating ${warn}${configPath}/${file_phphandler}${norm}"
    # update .insert file with socket filename or placeholder tag
    sed -i "s%${tag_phpSock}%${phpSock}%" "${configPath}/${file_phpSock}"
    # copy .insert file into nginx.conf
    sed -i -e "/${tag_phphandler}/{r ${configPath}/${file_phpSock}" -e 'd}' "${configPath}/${file_phphandler}"
    # add index.php to default index files
    sed -i 's/^\s*index/\    index index.php/' "${configPath}/${file_phphandler}"
fi

# notify user file updates are completed
echo -e "${ok}...files updated${norm}"



# debug section
echo -e "\n${mag}---------------------${norm}"
echo "Local IP4: $IP4"
echo "Server names: ${serverNames[*]}"
echo -e "${cyan}--------------------${norm}"
echo "Using Certbot: $useCertbot"
echo "CertbotDomain: $CertbotDomain"
echo -e "${cyan}--------------------${norm}"
echo "CertPath: $CertPath"
echo "KeyPath: $KeyPath"
echo "noOSCP: $noOSCP"
echo "CA-Chain: $CAChainPath"
echo "DHPath: $DHPath"
echo "Generating DH Params: $generateDH"
echo -e "${cyan}--------------------${norm}"
echo "usePHP: $usePHP"
echo "PHP listen type: $phpType"
echo "PHP address: $phpAddr"
echo "PHP port: $phpPort"
echo "PHP socket: $phpSock"
echo -e "${mag}---------------------${norm}\n"



exit 0