#!/bin/bash

### package check ###
source /bigscoots/wpo/extras/bigscoots.menu

if ! yum list installed at --quiet &>/dev/null; then
    echo "Installing packages"
    yum install -y at --quiet
fi

#### Check if compose is installed, if not install it ###

if ! composer -v --no-interaction  &>/dev/null;  then
        php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
        php composer-setup.php
        mv composer.phar /usr/local/bin/composer
fi

### Select Domain ###
DOMAINS=$(find "/home/nginx/domains/" -maxdepth 1 -type d -exec test -d "{}/log" \; -print | sed 's#.*/##' | sort)

if [ -z "$DOMAINS" ]; then
  echo "No domains found in $DOMAIN_DIR"
  exit 1
fi

### menu ###
PS3="Select a domain: "
select domain in $DOMAINS; do
  if [ -n "$domain" ]; then
    echo "You selected: $domain"
    selected_domain="$domain"
    break
  else
    echo "Invalid option. Please select a valid domain."
  fi
done

### PHP vers check ###
PHPOTEL=$(grep otel /usr/local/nginx/conf/conf.d/$domain.ssl.conf | head -n 1 | cut -d/ -f 6 | cut -d_ -f 1)
PHPVER=$(grep php /usr/local/nginx/conf/conf.d/$domain.ssl.conf | grep remi | head -n 1 | cut -d/ -f 6 | sed 's/php\([0-9]*\)-remi\.conf;/\1/')

if [[ "$1" == "remove" ]]; then
 UNIX_SOCK=$(grep fastcgi_pass /usr/local/nginx/conf/otel_$domain.conf | grep -v '\#' | awk '{print $2}' | cut -d: -f2 | tr -d ';')
 echo "Revert version"
 if [[ "$UNIX_SOCK" = "14000" ]]; then
 	sed -i "s|otel_$domain.conf|php80-remi.conf|g" /usr/local/nginx/conf/conf.d/$domain.ssl.conf
 elif [[ "$UNIX_SOCK" = "16000" ]]; then
        sed -i "s|otel_$domain.conf|php81-remi.conf|g" /usr/local/nginx/conf/conf.d/$domain.ssl.conf
 elif [[ "$UNIX_SOCK" = "18000" ]]; then
        sed -i "s|otel_$domain.conf|php82-remi.conf|g" /usr/local/nginx/conf/conf.d/$domain.ssl.conf
 fi
 rm -f /usr/local/nginx/conf/otel_$domain.conf
 exit 1
fi

if [[ -z "$PHPVER" && "$PHPOTEL" == "otel"  ]]; then
   echo "Otel is already enabled, skipping"
   exit 1
elif [[ -z "$PHPVER" ]]; then
   echo "Unsupported PHP version, please upgrade PHP >= 8.0.0"
   exit 1
elif [[ -n "$PHPVER" && "$PHPVER" == "74" ]]; then
   echo "Unsupported PHP version, please upgrade PHP >= 8.0.0"
   exit 1
else
   echo "$domain is using REMI php $PHPVER version"
   OTEL=$(/opt/remi/php$PHPVER/root/usr/bin/php -i | grep opentelemetry)
fi


### Check if selected version has otel installed if not install it ###
if [[ -z "$OTEL" && -n "$PHPVER" ]]; then
  if [[ ! -e "/opt/remi/php$PHPVER/root/usr/bin/pecl" ]]; then 
    wget http://pear.php.net/go-pear.phar -P /tmp
    /opt/remi/php$PHPVER/root/usr/bin/php /tmp/go-pear.phar
  fi
    export CFLAGS="-std=c99"
    echo "Installing opentelemetry library"
    /opt/remi/php$PHPVER/root/usr/bin/pecl -q install opentelemetry >/dev/null 2>&1
    unset CFLAGS
    echo "Installing protobuf library"
    /opt/remi/php$PHPVER/root/usr/bin/pecl -q install protobuf-3.19.4 >/dev/null 2>&1
    rm -f /tmp/go-pear.phar
fi

### Update php.ini and run composer install

if [ ! -d "/etc/opt/remi/php$PHPVER/otel/" ]; then
    mkdir /etc/opt/remi/php$PHPVER/otel
    cat > /etc/opt/remi/php$PHPVER/otel/composer.json <<EOF
    {
        "name": "opentelemetry/wordpress",
        "description": "Instrumentation for Opentelemetry",
        "type": "project",
        "minimum-stability": "beta",
        "require": {
            "open-telemetry/opentelemetry-auto-wordpress": "^0.0.15",
            "open-telemetry/sdk": "^1.0@beta",
            "open-telemetry/exporter-otlp": "^1.0@beta",
            "php-http/guzzle7-adapter": "^1.0"
        },
        "config": {
            "allow-plugins": {
                "php-http/discovery": true
            }
        }
    }
EOF

echo "Running composer install"
/opt/remi/php$PHPVER/root/usr/bin/php /usr/local/bin/composer install --ignore-platform-reqs --working-dir=/etc/opt/remi/php$PHPVER/otel


echo "Update php.ini"

cat > /etc/opt/remi/php$PHPVER/php.d/50-opentelemetry.ini <<EOF
auto_prepend_file=/etc/opt/remi/php$PHPVER/otel/vendor/autoload.php

[opentelemetry]
extension=opentelemetry.so
extension=protobuf.so
EOF
fi


### Generating configuration file ###
echo "Enter the duration in minutes, for how long you want to enable metrics:"
read at_time

cp /usr/local/nginx/conf/php$PHPVER-remi.conf /usr/local/nginx/conf/otel_$domain.conf
content_to_add="fastcgi_param OTEL_PHP_AUTOLOAD_ENABLED true;\nfastcgi_param OTEL_SERVICE_NAME $domain;\nfastcgi_param OTEL_EXPORTER_OTLP_ENDPOINT http://38.65.227.26:4318;\nfastcgi_param OTEL_TRACES_EXPORTER otlp;\nfastcgi_param OTEL_METRICS_EXPORTER otlp;\nfastcgi_param OTEL_LOGS_EXPORTER otlp;"
sed -i "91i\\$content_to_add" /usr/local/nginx/conf/otel_$domain.conf


### Updating vhost and basedir###

sed  -i "s|php$PHPVER-remi.conf|otel_$domain.conf|g" /usr/local/nginx/conf/conf.d/$domain.ssl.conf

BASE_CHECK=$(grep open_basedir /etc/centminmod/php.d/bsdomains.ini | grep $domain)
BASE_PHP=$(echo "$BASE_CHECK" | grep -oP '/etc/opt/remi/php\K\d+' | head -1)
if [[ ! "$BASE_CHECK" == *otel* ]]; then
	sed -i "s|$BASE_CHECK|$BASE_CHECK:/etc/opt/remi/php$PHPVER/otel|g" /etc/centminmod/php.d/bsdomains.ini
elif [[ "$BASE_CHECK" == *otel* && "$BASE_PHP" != "$PHPVER" ]]; then
	sed -i "s|$BASE_PHP|$PHPVER|g" /etc/centminmod/php.d/bsdomains.ini
fi

### Scheduler ###

echo "sed -i 's|otel_$domain.conf|php$PHPVER-remi.conf|g' /usr/local/nginx/conf/conf.d/$domain.ssl.conf; rm -f /usr/local/nginx/conf/otel_$domain.conf; scoots php restart $PHPVER" | at now + $at_time  minute

### restart ###

nprestart; scoots php restart $PHPVER