#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get $app domain)
path_url="/"
admin=$(ynh_app_setting_get $app admin)
is_public=$(ynh_app_setting_get $app is_public)
final_path=$(ynh_app_setting_get $app final_path)
db_name=$(ynh_app_setting_get "$app" psql_db)
admin_email=$(ynh_app_setting_get "$app" admin_email)
random_key=$(ynh_app_setting_get "$app" random_key)
name=$(ynh_app_setting_get "$app" name)
port=$(ynh_app_setting_get "$app" port)
db_pwd=$(ynh_app_setting_get "$app" psqlpwd)
cache=$(ynh_app_setting_get "$app" cache)
size=$(ynh_app_setting_get "$app" size)
registration=$(ynh_app_setting_get "$app" registration)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================

# Fix is_public as a boolean value
if [ "$is_public" = "Yes" ]; then
	ynh_app_setting_set $app is_public 1
	is_public=1
elif [ "$is_public" = "No" ]; then
	ynh_app_setting_set $app is_public 0
	is_public=0
fi

# If db_name doesn't exist, create it
if [ -z $db_name ]; then
	db_name=$(ynh_sanitize_dbid $app)
	ynh_app_setting_set $app db_name $db_name
fi

# If final_path doesn't exist, create it
if [ -z $final_path ]; then
	final_path=/var/www/$app
	ynh_app_setting_set $app final_path $final_path
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

# Stop Pleroma for upgrade
systemctl stop "$app"

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path $path_url)

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

# Download, check integrity, uncompress and patch the source from app.src
#ynh_setup_source "$final_path/$app"
( cd $final_path/$app && git pull )

#=================================================
# NGINX CONFIGURATION
#=================================================

# Create a dedicated nginx config
ynh_add_nginx_config

ynh_secure_remove /etc/nginx/conf.d/$app-cache.conf
if [ $cache -eq 1 ]
then
	cp -rf "../conf/cache.conf" "/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string "{APP}"    "$app"  "/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string "__SIZE__" "$size" "/etc/nginx/conf.d/$app-cache.conf"
	ynh_store_file_checksum "/etc/nginx/conf.d/$app-cache.conf"
	ynh_replace_string  "{APP}"     "$app"  "../conf/media.conf"
	ynh_replace_string  "__PORT__"  "$port" "../conf/media.conf"
	sudo su -c "cat ../conf/media.conf >> /etc/nginx/conf.d/$domain.d/$app.conf"
	ynh_store_file_checksum "/etc/nginx/conf.d/$domain.d/$app.conf"
fi

#=================================================
# UPGRADE DEPENDENCIES
#=================================================

# Add erlang for Debian Jessie 

if [ "$(lsb_release --codename --short)" == "jessie" ]; then
	echo "deb http://packages.erlang-solutions.com/debian jessie contrib" | tee /etc/apt/sources.list.d/erlang-solutions.list
elif 
	[ "$(lsb_release --codename --short)" == "stretch" ]; then
	echo "deb http://packages.erlang-solutions.com/debian stretch contrib" | tee /etc/apt/sources.list.d/erlang-solutions.list
fi
sudo wget https://packages.erlang-solutions.com/debian/erlang_solutions.asc
sudo apt-key add erlang_solutions.asc
sudo rm erlang_solutions.asc

# install dependencies
ynh_install_app_dependencies git build-essential postgresql postgresql-contrib openssl g++ apt-transport-https erlang-inets elixir erlang-dev erlang-parsetools erlang-xmerl erlang-tools


#=================================================
# CREATE DEDICATED USER
#=================================================

# Create a dedicated user (if not existing)
ynh_system_user_create $app

#=================================================
# PHP-FPM CONFIGURATION
#=================================================

# Create a dedicated php-fpm config
#ynh_add_fpm_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# ...
#=================================================

#===================================================
# Add PostgreSQL extension pg_trgm and citext
#===================================================

ynh_psql_execute_as_root "\connect $db_name 
CREATE EXTENSION IF NOT EXISTS unaccent;CREATE EXTENSION IF NOT EXISTS pg_trgm;"
ynh_psql_execute_as_root "\connect $db_name 
CREATE EXTENSION IF NOT EXISTS unaccent;CREATE EXTENSION IF NOT EXISTS citext;"

# Open this port
yunohost firewall allow Both "$port" 2>&1


# Give permission to the final_path
chown -R "$app":"$app" "$final_path"
( cd $final_path/$app && sudo -u "$app" MIX_ENV=prod mix local.hex --force )
( cd $final_path/$app && sudo -u "$app" MIX_ENV=prod mix local.rebar --force )
( cd $final_path/$app && sudo -u "$app" mix deps.get )
ynh_psql_execute_as_root \
"ALTER USER $app WITH SUPERUSER;"
( cd $final_path/$app && sudo -u "$app" MIX_ENV=prod mix ecto.migrate --force )
ynh_psql_execute_as_root \
"ALTER USER $app WITH NOSUPERUSER;"

#=================================================
# MODIFY A CONFIG FILE
#=================================================
cp -f ../conf/prod.secret.exs "$final_path/$app/config/prod.secret.exs"
cp -f ../conf/setup_db.psql "$final_path/$app/config/setup_db.psql"

ynh_replace_string "__DOMAIN__"        "$domain"        "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__KEY__"           "$random_key"    "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__INSTANCE_NAME__" "$name"          "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__DB_NAME__"       "$app"           "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__DB_PWD__"        "$db_pwd"        "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__ADMIN_EMAIL__"   "$admin_email"   "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__PORT__"          "$port"          "$final_path/$app/config/prod.secret.exs"
ynh_replace_string "__DB_NAME__"       "$app"           "$final_path/$app/config/setup_db.psql"
ynh_replace_string "__DB_PWD__"        "$db_pwd"        "$final_path/$app/config/setup_db.psql"
if [ $cache -eq 1 ]
then
	ynh_replace_string "__MEDIA_CACHE__"    "true"        "$final_path/$app/config/prod.secret.exs"
else
	ynh_replace_string "__MEDIA_CACHE__"    "false"       "$final_path/$app/config/prod.secret.exs"
fi

#  Set registrations open/closed
if [ $registration -eq 1 ]
then
 ynh_replace_string "__REG__" "true"  "$final_path/$app/config/prod.secret.exs"
else
 ynh_replace_string "__REG__" "false" "$final_path/$app/config/prod.secret.exs"
fi

# Recalculate and store the config file checksum into the app settings
ynh_store_file_checksum "$final_path/$app/config/prod.secret.exs"

### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
ynh_backup_if_checksum_is_different "$final_path/$app/config/prod.secret.exs"
# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum "$final_path/$app/config/prod.secret.exs"

#=================================================
# SETUP LOGROTATE
#=================================================

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

#=================================================
# SETUP SYSTEMD
#=================================================
# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions on app files
chown -R "$app":"$app" "$final_path"


#=================================================
# SETUP SSOWAT
#=================================================

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway
	ynh_app_setting_set $app unprotected_uris "/"
fi

#=================================================
# RELOAD NGINX
#=================================================

systemctl reload nginx
systemctl enable "$app"
systemctl start "$app"
# App needs time to start
sleep 10