#!/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=2

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

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

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=20

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	ynh_clean_check_starting
	# 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
#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

	ynh_app_setting_delete --app=$app --key=is_public
fi

# Remove the service from the list of services known by YunoHost (added from `yunohost service add`)
if ynh_exec_warn_less yunohost service status $app >/dev/null
then
	ynh_script_progression --message="Removing $app service integration..." --weight=1
	yunohost service remove $app
fi

ynh_app_setting_delete --app=$app --key=port

ynh_remove_systemd_config

#=================================================
# 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=$app --home_dir="$final_path"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=20

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

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=18

# Install Nodejs
ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=2

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# BUILD APP
#=================================================
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Building app... (this will take some time and resources!)" --weight=20

	pushd "$final_path/build"
		ynh_use_nodejs
		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $ynh_npm install
		ynh_npm install gulp -g
		ynh_exec_warn_less ynh_exec_as $app $ynh_node_load_PATH $ynh_npm run build
	popd
	tmpdir="$(mktemp -d)"
	ynh_exec_as $app cp -af "$final_path/live/config.js" "$tmpdir/config.js"
	ynh_secure_remove --file="$final_path/live"
	ynh_exec_as $app mv "$final_path/build/dist" "$final_path/live"
	ynh_exec_as $app cp -af "$tmpdir/config.js" "$final_path/live/config.js"
fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

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

ynh_add_config --template="../conf/config.example.js" --destination="$final_path/live/config.js"

chmod 400 "$final_path/live/config.js"
chown $app:$app "$final_path/live/config.js"

#=================================================
# GENERIC FINALIZATION
#=================================================
# 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