#!/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)
path_url="/"
port=$(ynh_app_setting_get --app=$app --key=port)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
autosynchronize=$(ynh_app_setting_get --app=$app --key=autosynchronize)
couch_url=$(ynh_app_setting_get --app=$app --key=couch_url)
couch_admin_name=$(ynh_app_setting_get --app=$app --key=couch_admin_name)
couch_admin_password=$(ynh_app_setting_get --app=$app --key=couch_admin_password)
admin_email=$(ynh_app_setting_get --app=$app --key=admin_email)

#=================================================
# 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=10

# 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="systemd"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	# Download, check integrity, uncompress and patch the source from app.src
	ynh_script_progression --message="Upgrading source files..." --weight=3
	ynh_setup_source --dest_dir="$final_path"

	# Regenerate config files removed in upgrade
	ynh_script_progression --message="Regenerating dato config files..." --weight=3
	dato_setup_config_files

fi

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=5

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# UPGRADE NODEJS
#=================================================
ynh_script_progression --message="Installing NodeJS..." --weight=15

ynh_install_nodejs --nodejs_version=$nodejs_version

#=================================================
# 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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# BUILD NODE DEPENDENCIES
#=================================================
ynh_script_progression --message="Building node dependencies..." --weight=90

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

pushd "$final_path"
	ynh_use_nodejs
	sudo -u $app env $ynh_node_load_PATH npm install --loglevel warn
popd

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

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

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

# Set permissions on app files (let dato write right only to what it needs to modify)
chown -R root: $final_path
[ -d "$final_path/dist" ] || mkdir "$final_path/dist"
chown -R $app:$app $final_path/dist $final_path/global $final_path/config

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1

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

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

yunohost service add $app --description="Data storage with a convenient and flexible interface" --log="/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting dato app service and building pages..." --weight=60

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="electrode server listening on port" --timeout=600

# #=================================================
# # UPGRADE FAIL2BAN
# #=================================================
# ynh_script_progression --message="Reconfiguring Fail2Ban..." --weight=2
#
# # Create a dedicated Fail2Ban config
# ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"

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

ynh_systemd_action --service_name=nginx --action=reload

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

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