#!/bin/bash

serverName="nginx"
serverPackages="nginx"
serverSourceUrl="https://nginx.org/packages/debian/"
phpVersion="7.4"
phpName="php${phpVersion}"
phpPackages="${phpName}-fpm ${phpName}-json ${phpName}-mysql ${phpName}-curl ${phpName}-intl ${phpName}-gd ${phpName}-zip ${phpName}-xml ${phpName}-mbstring php-imagick php-apcu php-redis"

aptOpt=
step_config() {
  if [ $QUIET -ne 0 ] ; then
    aptOpt="-y"
  fi
}

step_1_info() {
  echoinfoArgs "[DEBIAN RELEASE]"
  echo "Setup latest apt source list for $serverName"
  echoinfo "$serverSourceUrl"
}
step_1_alias() { ALIAS="setup"; }
step_1() {
  shift
  local osRelease=$1
  endCheckEmpty osRelease "Debian release not provided"
  
  echoseq " [I] Setup apt source for $serverName $serverSourceUrl"
  local srvSource="deb $serverSourceUrl $osRelease nginx"
  addConf -s "$srvSource" "$serverSourceLoc"
  if [ $? -eq 0 ] ; then
    echoseq " [I] Get repository key for $serverSourceUrl"Y
    exe apt install gnupg $aptOpt
    exe apt-key adv --keyserver keyserver.ubuntu.com --recv-keys ABF5BD827BD9BF62
  fi
}
serverSourceLoc="/etc/apt/sources.list.d/nginx.list"

step_2_info() { 
  echo "Installation of $serverName packages:"
  echoinfo "$serverPackages"
}
step_2_alias() { ALIAS=install; }
step_2() {
  exe apt update
  exe apt install $serverPackages $aptOpt
  endReturn -o $? "Failed to install $serverName"
}

step_3_info() { echo "Basic nginx configuration for initial letsencrypt certificate creation"; }
step_3() {
  # Writing acme-challenge code snipped for certbot web root authentication
  addConf -c "$snippetLetsencrypt" "$snippetLetsencryptLoc"

  # Writing minimal default (see below)
  addConf -c "$siteDefaultIp4" "$siteDefaultLoc"

  # try fix errors on first install attempt
  # (possible missing ipv6 support on system)
  if [ $ERNO -ne 0 ] ; then
    exe apt install nginx $aptOpt
  fi

  # create webroot 
  exe mkdir -p "$siteLetsencryptWww"

  echoseq -n "Restarting Nginx..."
  exe service nginx restart && echoseq "ok"
  endReturn -o $? "Failed to install $serverName"
}
snippetLetsencryptLoc="/etc/nginx/snippets/letsencrypt.conf"
siteLetsencryptWww="/var/www/letsencrypt"
snippetLetsencrypt="\
location ^~ /.well-known/acme-challenge/ {
default_type \"text/plain\";
root ${siteLetsencryptWww};
}"
siteDefaultLoc="/etc/nginx/sites-available/default"
siteDefaultIp4="server {
listen 80 default_server;

include ${snippetLetsencryptLoc}; 
}"

step_4_info() { echo "Installation of $phpName packages:"
  echoinfo "$phpPackages"; }
step_4() {
  exe apt install $phpPackages $aptOpt
}
phpFpmConfigLocation="/etc/php/${phpVersion}/fpm/conf.d/90-custom_pi.ini"
phpFpmConfig="post_max_size=64M
upload_max_filesize=100M
max_execution_time=600

apc.enable_cli=1

date.timezone = Europe/Berlin

opcache.enable=1
opcache.enable_cli=1
opcache.interned_strings_buffer=8
opcache.max_accelerated_files=10000
opcache.memory_consumption=128
opcache.save_comments=1
opcache.revalidate_freq=1"
phpCliConfigLocation="/etc/php/${phpVersion}/cli/conf.d/90-custom_pi.ini"
phpCliConfig="\
date.timezone = Europe/Berlin"

step_5_info() { echo "Configuration of ${phpName} fpm and cli"; }
step_5() {
  addConf -c "$phpFpmConfig" "$phpFpmConfigLocation"
  addConf -c "$phpCliConfig" "$phpCliConfigLocation"

  echoseq -n "Restarting ${phpName} ... "
  exe service ${phpName}-fpm restart && echoseq "ok"
}

step_6_info() { echo "Installation notes"; }
step_6_alias() { ALIAS="notes"; }
step_6() {
  cat <<NOTES_EOF
# Set user to www-data on debian an tune performance a bit
  [/etc/nginx/nginx.conf]
user www-data;
worker_processes  1;

events {
    worker_connections  1024;
    multi_accept        on;
    use                 epoll;
}

NOTES_EOF
}

VERSION_SEQREV=14
. /usr/local/bin/sequencer.sh