#!/bin/bash

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

source _common.sh
source ynh_docker_image_extract
source ynh_handle_app_migration
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)
admin=$(ynh_app_setting_get --app=$app --key=admin)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)

admin_token=$(ynh_app_setting_get --app=$app --key=admin_token)
rocket_port=$(ynh_app_setting_get --app=$app --key=rocket_port)
websocket_port=$(ynh_app_setting_get --app=$app --key=websocket_port)

#=================================================
# 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)..."

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

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

#=================================================
# HANDLE MIGRATION FROM BITWARDEN
#=================================================

ynh_handle_app_migration --migration_id="bitwarden" --migration_list="bitwarden_migration"

if [ $migration_process -eq 1 ]
then
	# If a migration has been perform
	# Reload some values changed by the migration process
	final_path=$(ynh_app_setting_get --app=$app --key=final_path)
	db_name=$(ynh_app_setting_get --app=$app --key=db_name)

	# Move config file
	mv $final_path/live/bitwarden_rs.env $final_path/live/.env
	ynh_delete_file_checksum --file="/var/www/$old_app/live/bitwarden_rs.env"
	ynh_store_file_checksum --file="$final_path/live/.env" 
	ynh_secure_remove --file="$final_path/live/bitwarden_rs"

	# Manage permissions
	ynh_permission_update --permission="main" --add="all_users"
	ynh_permission_update --permission="main" --add="visitors"

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

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

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

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

if ! ynh_permission_exists --permission="admin"; then
	# Create the required permissions
	ynh_permission_create --permission="admin" --url="/admin" --allowed=$admin --show_tile="false"
fi

# Create a permission if needed
if ! ynh_permission_exists --permission="api"; then
	ynh_permission_create --permission="api" --url="/api" --additional_urls="/identity/connect/token" --allowed="visitors" --auth_header="false" --show_tile="false" --protected="true"
fi

# If datadir doesn't exist, create it
if [ -z $datadir ]; then
	ynh_script_progression --message="Making sure data directory exists..."
	datadir=/home/yunohost.app/$app
	ynh_app_setting_set --app=$app --key=datadir --value=$datadir
	mkdir -p $datadir
	rsync -arz "$final_path/live/data/" "$datadir/" --delete-after --remove-source-files
	ynh_secure_remove --file="$final_path/live/data"
	ynh_system_user_create --username=$app --home_dir="$final_path"
	chmod 750 "$datadir"
	chmod -R o-rwx "$datadir"
	chown -R $app:$app "$datadir"
fi

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

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

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

	# Download, check integrity, uncompress the source of vaultwarden from app.src to his build directory
	docker_arg=""
	if [ $YNH_ARCH == "armhf" ] 
	then
		docker_arg="--os_arch_variant=linux/arm/v7"
	fi
	ynh_docker_image_extract --dest_dir="$final_path/build/" --image_spec="$pkg_image:$(ynh_app_upstream_version)" $docker_arg
	mkdir -p "$final_path/live/"
fi

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

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

ynh_install_app_dependencies $pkg_dependencies

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

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# MAKE UPGRADE
#=================================================
ynh_script_progression --message="Making upgrade..."

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	mv -f "$final_path/build/vaultwarden" "$final_path/live/vaultwarden"
	ynh_secure_remove --file="$final_path/live/web-vault/"
	rsync -a "$final_path/build/web-vault/" "$final_path/live/web-vault/"
	ynh_secure_remove --file="$final_path/build"
fi

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

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

ynh_add_config --template="../conf/vaultwarden.env" --destination="$final_path/live/.env"

chmod 400 "$final_path/live/.env"
chown $app:$app "$final_path/live/.env"

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

# Create a dedicated systemd config
ynh_add_systemd_config

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

mkdir -p "/var/log/$app"
chown -R $app:$app "/var/log/$app"
# 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..."

yunohost service add $app --description="$app daemon for vaultwarden" --log="/var/log/$app/$app.log"

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

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Rocket has launched from" --length=100

#=================================================
# UPGRADE FAIL2BAN
#=================================================
ynh_script_progression --message="Reconfiguring Fail2Ban..."

mkdir -p "/var/log/$app"
touch "/var/log/$app/$app.log"
chown -R $app:$app "/var/log/$app"
# Create a dedicated Fail2Ban config
ynh_add_fail2ban_config --logpath="/var/log/$app/$app.log" --failregex="^.*Username or password is incorrect\. Try again\. IP: <HOST>\. Username:.*$"

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

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# FINISH MIGRATION PROCESS
#=================================================

if [ $migration_process -eq 1 ]
then
	ynh_script_progression --message="Bitwarden has been successfully migrated to Vaultwarden! \
A last scheduled operation will run in a couple of minutes to finish the \
migration in YunoHost side. Do not proceed any application operation while \
you don't see Vaultwarden as installed."
	script_post_migration=bitwarden_post_migration.sh
	cp ../conf/$script_post_migration /tmp
	ynh_replace_string --match_string="__OLD_APP__" --replace_string="$old_app" --target_file=/tmp/$script_post_migration
	ynh_replace_string --match_string="__NEW_APP__" --replace_string="$app" --target_file=/tmp/$script_post_migration
	chmod +x /tmp/$script_post_migration
	(cd /tmp; echo "/tmp/$script_post_migration > /tmp/$script_post_migration.log 2>&1" | at now + 2 minutes)
fi

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

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