#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
admin_email=$(ynh_app_setting_get --app=$app --key=admin_email)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
port=$(ynh_app_setting_get --app=$app --key=port)
db_name=$(ynh_app_setting_get --app=$app --key=psql_db)
db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..."

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

# Close a port
if yunohost firewall list | grep -q "\- $port$"
then
	ynh_script_progression --message="Closing port $port"
	ynh_exec_warn_less yunohost firewall disallow TCP $port
fi

# Add PostgreSQL extension for v1.0.0-beta.10.pre.1
ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS unaccent;" --database=$db_name 
ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name 

# Remove repository
ynh_secure_remove --file="/etc/apt/sources.list.d/jessie-backports.list"
ynh_secure_remove --file="/etc/apt/sources.list.d/yarn.list"

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..."

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..."

ynh_systemd_action --service_name=$app --action="stop" --log_path="systemd"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..."
	
	# Create a temporary directory
	tmpdir="$(mktemp -d)"
	
	# Backup the config file in the temp dir
	cp -a "$final_path/config/production.yaml" "$tmpdir/production.yaml"
	if [ -s "$final_path/config/local-production.json" ]
	then
		cp -a "$final_path/config/local-production.json" "$tmpdir/local-production.json"
	fi
	
	# Remove the app directory securely
	ynh_secure_remove --file="$final_path"
	
	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
	
	#Copy the admin saved settings from tmp directory to final path	
	cp -a  "$tmpdir/production.yaml" "$final_path/config/production.yaml"	

	if [ -s "$tmpdir/local-production.json" ]
	then
		cp -a  "$tmpdir/local-production.json" "$final_path/config/local-production.json"
	else
		cp ../conf/local-production.json "$final_path/config/local-production.json"
	fi
	
	# Remove the tmp directory securely
	ynh_secure_remove --file="$tmpdir"
fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading nginx web server configuration..."

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..."

# Install nodejs
ynh_install_nodejs --nodejs_version=$YNH_NODEJS_VERSION

# Install dependencies
ynh_install_app_dependencies $pkg_dependencies

# Install ffmpeg from backports for Debian Jessie and from main for others
if [ "$(lsb_release --codename --short)" == "jessie" ]; then
	ynh_install_extra_app_dependencies --repo="deb http://httpredir.debian.org/debian jessie-backports main" --package="ffmpeg"
else
	ynh_add_app_dependencies --package="ffmpeg"
fi

# Install Yarn
ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"

# Remove hook
ynh_secure_remove --file="/usr/share/yunohost/hooks/conf_regen/15-nginx_$app"
yunohost tools regen-conf nginx

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..."

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# CREATE THE DATA DIRECTORY
#=================================================
ynh_script_progression --message="Creating the data directory..."

# Define app's data directory
datadir="/home/yunohost.app/${app}/storage"

if [ ! -d "$datadir" ]
then
	# Create app folders
	mkdir -p "$datadir"
fi

# Give permission to the datadir
chown -R "$app":"$app" "$datadir"

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modifying a config file..."

config="$final_path/config/production.yaml"
ynh_backup_if_checksum_is_different --file="$config"
cp ../conf/production.yaml "$config"
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$config"
ynh_replace_string --match_string="__DB_NAME__" --replace_string="$app" --target_file="$config"
ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="$config"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$config"
ynh_replace_string --match_string="__EMAIL__" --replace_string="$admin_email" --target_file="$config"
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$config"
ynh_store_file_checksum --file="$config"

local_config="$final_path/config/local-production.json"
ynh_backup_if_checksum_is_different --file="$local_config"
ynh_store_file_checksum --file="$local_config"

#=================================================
# BUILD YARN DEPENDENCIES
#=================================================
ynh_script_progression --message="Building yarn dependencies..."

chown -R "$app":"$app" $final_path

pushd "$final_path"
	ynh_use_nodejs
	sudo -u $app env $ynh_node_load_PATH yarn install --production --pure-lockfile 
popd

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

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

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..."

# Create a dedicated systemd config
ynh_add_systemd_config --others_var="ynh_node_load_PATH"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..."

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

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Upgrading SSOwat configuration..."

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

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..."

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Server listening on localhost"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading nginx web server..."

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================

ynh_script_progression --message="Upgrade of $app completed"