#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
port=$(ynh_app_setting_get --app=$app --key=port)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)
is_signup=$(ynh_app_setting_get --app=$app --key=signup)

#=================================================
# CHECK VERSION
#=================================================

### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up the app before upgrading (may take a while)..." --weight=1

# 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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=1

ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

#
# N.B. : the followings setting migrations snippets are provided as *EXAMPLES*
# of what you may want to do in some cases (e.g. a setting was not defined on
# some legacy installs and you therefore want to initiaze stuff during upgrade)
#

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

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

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

#=================================================
# CHECK AND CREATE FINAL_PATH
#=================================================
ynh_script_progression --message="Setting up and create final app path..." --weight=1

ynh_app_setting_set $app final_path $final_path
# Download, check integrity, uncompress and patch the source from app.src
# ynh_setup_source --dest_dir="$final_path"

# Create final_path
mkdir -p "$final_path"

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=4

ynh_install_nodejs --nodejs_version=$NODEJS_VERSION
ynh_use_nodejs

#=================================================
# SPECIFIC UPGRADE
#=================================================
# ADD A CONFIGURATION
#=================================================
ynh_script_progression --message="Adding a configuration file..."

ynh_add_config --template="../conf/config.sample.yml" --destination="$final_path/config.yml"

chmod 400 "$final_path/config.yml"
chown $app:$app "$final_path/config.yml"

#=================================================
# DEFINE ARMADIETTO OPTIONS & CREATE DATA DIRECTORY
#=================================================
ynh_script_progression --message="Configuring armadietto as a service..." --weight=1

# Define armadietto module path
modulepath="$node_version_path/$nodejs_version/lib/node_modules/armadietto/lib"

# Create app data folder
mkdir -p "$datadir"

# Using Armadietto as a service in a basic node server
cp -f ../conf/server.js "$final_path/server.js"

ynh_replace_string --match_string="__MODULE_PATH__"	--replace_string="$modulepath"	--target_file="$final_path/server.js"
ynh_replace_string --match_string="__DATADIR__"		--replace_string="$datadir"		--target_file="$final_path/server.js"
ynh_replace_string --match_string="__PORT__"		--replace_string="$port"		--target_file="$final_path/server.js"
ynh_replace_string --match_string="__DOMAIN__"		--replace_string="$domain"		--target_file="$final_path/server.js"
ynh_replace_string --match_string="__SIGNUP__"		--replace_string="$is_signup"	--target_file="$final_path/server.js"

#=================================================
# UPGRADE ARMADIETTO
#=================================================
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrade armadietto with npm..." --weight=1

	pushd $final_path
		ynh_npm -g i armadietto
	popd

	ynh_script_progression --message="Armadietto upgraded..."
fi

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

### Same as during install
###
### The file will automatically be backed-up if it's found to be manually modified (because
### ynh_add_config keeps track of the file's checksum)

# ynh_add_config --template="some_config_file" --destination="$final_path/some_config_file"

# FIXME: this should be handled by the core in the future
# You may need to use chmod 600 instead of 400,
# for example if the app is expected to be able to modify its own config
# chmod 400 "$final_path/some_config_file"
# chown $app:$app "$final_path/some_config_file"

### For more complex cases where you want to replace stuff using regexes,
### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
### When doing so, you also need to manually call ynh_store_file_checksum
###
### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$final_path/some_config_file"
### ynh_store_file_checksum --file="$final_path/some_config_file"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..." --weight=1

# Use logrotate to manage application logfile(s)
ynh_use_logrotate

#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Secure files and directories" --weight=1

# Set permissions to app files
chown -R $app:$app "$final_path"
chmod 0700 $datadir && chown $app:$app $datadir

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add $app --description="A short description of the app" --log="/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# RESTART ARMADIETTO
#=================================================
ynh_script_progression --message="Start armadietto web server..." --weight=1

# Start a systemd service
ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"

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

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