#!/bin/bash

# Create a dedicated php-fpm config
#
# usage: ynh_add_fpm_config [--phpversion=7.X]
# | arg: -v, --phpversion - Version of php to use.
#
# Requires YunoHost version 2.7.2 or higher.
ynh_add_fpm_config () {
	# Declare an array to define the options of this helper.
	local legacy_args=v
	declare -Ar args_array=( [v]=phpversion= )
	local phpversion
	# Manage arguments with getopts
	ynh_handle_getopts_args "$@"

	# Configure PHP-FPM 7.0 by default
	phpversion="${phpversion:-7.0}"

	local fpm_config_dir="/etc/php/$phpversion/dedicated-fpm"
	local old_fpm_config_dir="/etc/php/$phpversion/fpm"
	local fpm_service="php${phpversion}-fpm-$app"
	# Configure PHP-FPM 5 on Debian Jessie
	if [ "$(ynh_get_debian_release)" == "jessie" ]; then
		fpm_config_dir="/etc/php5/fpm"
		fpm_service="php5-fpm"
	fi

	# Create the directory for fpm pools
	mkdir -p "$fpm_config_dir/pool.d"

	ynh_app_setting_set --app=$app --key=fpm_config_dir --value="$fpm_config_dir"
	ynh_app_setting_set --app=$app --key=fpm_service --value="$fpm_service"
	finalphpconf="$fpm_config_dir/pool.d/$app.conf"

	# Migrate from mutual php service to dedicated one.
	if [ -e "$old_fpm_config_dir/pool.d/$app.conf" ]
	then
		ynh_print_info --message="Migrate to a dedicated php-fpm service for $app."
		# Create a backup of the old file before migration
		ynh_backup_if_checksum_is_different --file="$old_fpm_config_dir/pool.d/$app.conf"
		# Remove the old php config file
		ynh_secure_remove --file="$old_fpm_config_dir/pool.d/$app.conf"
		# Reload php to release the socket and allow the dedicated service to use it
		systemctl reload php${phpversion}-fpm
	else
        	ynh_backup_if_checksum_is_different --file="$finalphpconf"
	fi

	cp ../conf/php-fpm.conf "$finalphpconf"
	ynh_replace_string --match_string="__NAMETOCHANGE__" --replace_string="$app" --target_file="$finalphpconf"
	ynh_replace_string --match_string="__FINALPATH__" --replace_string="$final_path" --target_file="$finalphpconf"
	ynh_replace_string --match_string="__USER__" --replace_string="$app" --target_file="$finalphpconf"
	ynh_replace_string --match_string="__PHPVERSION__" --replace_string="$phpversion" --target_file="$finalphpconf"
	chown root: "$finalphpconf"
	ynh_store_file_checksum --file="$finalphpconf"

	if [ -e "../conf/php-fpm.ini" ]
	then
		echo "Packagers ! Please do not use a separate php ini file, merge your directives in the pool file instead." >&2
		finalphpini="$fpm_config_dir/conf.d/20-$app.ini"
		ynh_backup_if_checksum_is_different "$finalphpini"
		cp ../conf/php-fpm.ini "$finalphpini"
		chown root: "$finalphpini"
		ynh_store_file_checksum "$finalphpini"
	fi

	# Create a config for a dedicated php-fpm service for the app
	echo "
[Unit]
Description=PHP $phpversion FastCGI Process Manager for $app
After=network.target

[Service] 
Type=notify
PIDFile=/run/php/php${phpversion}-fpm-$app.pid
ExecStart=/usr/sbin/php-fpm${phpversion} --nodaemonize --fpm-config $finalphpconf --pid /run/php/php${phpversion}-fpm-$app.pid
ExecReload=/bin/kill -USR2 \$MAINPID

[Install]
WantedBy=multi-user.target
" > ../conf/$fpm_service

	# Create this dedicated php-fpm service
	ynh_add_systemd_config --service=$fpm_service --template=$fpm_service

	ynh_systemd_action --service_name=$fpm_service --action=restart
}

# Remove the dedicated php-fpm config
#
# usage: ynh_remove_fpm_config
#
# Requires YunoHost version 2.7.2 or higher.
ynh_remove_fpm_config () {
	local fpm_config_dir=$(ynh_app_setting_get --app=$app --key=fpm_config_dir)
	local fpm_service=$(ynh_app_setting_get --app=$app --key=fpm_service)
	# Assume php version 7 if not set
	if [ -z "$fpm_config_dir" ]; then
		fpm_config_dir="/etc/php/7.0/fpm"
		fpm_service="php7.0-fpm"
	fi

	# Remove the dedicated service php-fpm service
	ynh_remove_systemd_config --service=$fpm_service
	yunohost service remove $fpm_service
	ynh_secure_remove --file="$fpm_config_dir/pool.d/$app.conf"
	ynh_secure_remove --file="$fpm_config_dir/conf.d/20-$app.ini" 2>&1
}