#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_print_info "Loading installation settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get "$app" domain)
path_url=$(ynh_app_setting_get "$app" path)
is_public=$(ynh_app_setting_get "$app" is_public)
final_path=$(ynh_app_setting_get "$app" final_path)
db_name=$(ynh_app_setting_get "$app" db_name)
db_user=$db_name
port=$(ynh_app_setting_get "$app" port)
db_pwd=$(ynh_app_setting_get "$app" psqlpwd)
redis_db=$(ynh_app_setting_get "$app" redis_db)
code_migration=$(ynh_app_setting_get "$app" code_migration)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_print_info "Ensuring downward compatibility..."

# If redis_db doesn't exist, create it
if [ -z "$redis_db" ]; then
	redis_db=0
	ynh_app_setting_set "$app" redis_db "$redis_db"
fi

# make sure we have the last code organization
if [ ! -d "$final_path/code/" ]; then
	mkdir "$final_path-tmp"
	mv "$final_path"/* "$final_path-tmp/"

	mkdir "$final_path/code"
	mv "$final_path-tmp/data/media" "$final_path/media"
	mv "$final_path-tmp/data/music" "$final_path/import"
	mv "$final_path-tmp"/* "$final_path/code"

	ynh_secure_remove "$final_path-tmp/"
	ynh_app_setting_set "$app" code_migration 1
fi

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

# Inform the backup/restore process that it should not save the data directory
ynh_app_setting_set "$app" backup_core_only 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

#=================================================
# STOP SERVICES
#=================================================
ynh_print_info "Stopping $app services..."

systemctl stop "$app-beat.service"
systemctl stop "$app-server.service"
systemctl stop "$app-worker.service"

#=================================================
# CHECK THE PATH
#=================================================

# Normalize the URL path syntax
path_url=$(ynh_normalize_url_path "$path_url")

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# CLOSE A PORT
#=================================================

if yunohost firewall list | grep -q "\- $port$"
then
	echo "Close port $port"
	yunohost firewall disallow TCP $port 2>&1
fi

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_print_info "Upgrading source files..."

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

(
	cd "$final_path"
	mkdir -p code/config code/api code/data/static media import code/front
)

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_print_info "Upgrading nginx web server configuration..."

# remove domain specific configuration
funkwhale_nginx_domain_cleaning

# add funkwhale specifics at the beginning of the domain configuration
funkwhale_nginx_domain_configure

# Create a dedicated nginx config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_print_info "Upgrading dependencies..."

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_print_info "Making sure dedicated system user exists..."

# Create a system user
ynh_system_user_create "$app"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# PYTHON DEPENDENCIES
#=================================================

ynh_secure_remove "$final_path/code/virtualenv"
virtualenv -p python3 "$final_path/code/virtualenv"
(
	set +o nounset
	source "${final_path}/code/virtualenv/bin/activate"
	set -o nounset
	pip install --upgrade pip
	pip install --upgrade setuptools
	pip install wheel
	pip install -r "${final_path}/code/api/requirements.txt"

	# https://code.eliotberriot.com/funkwhale/funkwhale/tags/0.16
	pip uninstall django-cacheops --yes
)

#=================================================
# MODIFY THE CONFIG FILE
#=================================================

configfile="$final_path/code/config/.env"

cp ../conf/env.prod "$configfile"

key=$(ynh_string_random)

ynh_app_setting_set "$app" key "$key"

ynh_replace_string "__REDIS_DB__"  "$redis_db"    "$configfile"
ynh_replace_string "__PORT__"      "$port"        "$configfile"
ynh_replace_string "__DOMAIN__"    "$domain"      "$configfile"
ynh_replace_string "__DBUSER__"    "$db_name"     "$configfile"
ynh_replace_string "__DBPWD__"     "$db_pwd"      "$configfile"
ynh_replace_string "__DBNAME__"    "$app"         "$configfile"
ynh_replace_string "__FINALPATH__" "$final_path"  "$configfile"
ynh_replace_string "__KEY__"       "$key"         "$configfile"

loadfile="$final_path/code/load_env"

cat > "$loadfile" <<'EOL'
#!/bin/bash
export $(cat "__FINALPATH__/code/config/.env" | grep -v ^# | xargs)
EOL

chmod +x "$loadfile"

ynh_replace_string "__FINALPATH__" "$final_path"  "$loadfile"

#=================================================
# MIGRATE
#=================================================

(
	set +o nounset
	source "${final_path}/code/virtualenv/bin/activate"
	source "$loadfile"
	set -o nounset
	cd "$final_path/code"

	# needed for enabling the 'unaccent' extension
	ynh_psql_execute_as_root "ALTER USER $db_user WITH SUPERUSER;"
	python api/manage.py migrate
	ynh_psql_execute_as_root "ALTER USER $db_user WITH NOSUPERUSER;"

	python api/manage.py collectstatic --clear --noinput

	# https://code.eliotberriot.com/funkwhale/funkwhale/tags/0.16 # users-now-have-an-activitypub-actor-manual-action-required
	python api/manage.py script create_actors --no-input
	# https://code.eliotberriot.com/funkwhale/funkwhale/tags/0.16 #image-thumbnails-manual-action-required
	python api/manage.py script create_image_variations --no-input

	# https://docs.funkwhale.audio/upgrading/0.17.html#upgrade-instructions
	python api/manage.py script migrate_to_user_libraries --no-input

	# Delete pre 0.17 federated tracks [manual action suggested]
	# https://dev.funkwhale.audio/funkwhale/funkwhale/tags/0.18
	python api/manage.py script delete_pre_017_federated_uploads --no-input
)

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_print_info "Upgrading systemd configuration..."

cp ../conf/funkwhale.target "/etc/systemd/system/$app.target"
ynh_replace_string "__APP__"    "$app"   "/etc/systemd/system/$app.target"

# Create a dedicated systemd config
ynh_add_systemd_config "$app-server" "funkwhale-server.service"
ynh_add_systemd_config "$app-worker" "funkwhale-worker.service"
ynh_add_systemd_config "$app-beat"   "funkwhale-beat.service"

systemctl restart "$app".target

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

chown -R "$app": "$final_path"
chmod -R 755 "$final_path/code/front/dist/"

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

#=================================================
# SETUP FAIL2BAN
#=================================================

ynh_add_fail2ban_config "/var/log/nginx/$domain-access.log" "<HOST>.* \"POST /api/v1/token/ HTTP/1.1\" 400 68.*$" 5

#=================================================
# SETUP SSOWAT
#=================================================
ynh_print_info "Upgrading SSOwat configuration..."

# Make app public if necessary
if [ "$is_public" -eq 1 ]
then
	# makes sure no SSO credentials to be passed
	ynh_app_setting_set "$app" skipped_uris "/"
fi

#=================================================
# RELOAD NGINX
#=================================================
ynh_print_info "Upgrading SSOwat configuration..."

systemctl reload nginx

#=================================================
# REMOVE CODE MIGRATION FLAG
#=================================================

ynh_app_setting_set "$app" code_migration 2

#=================================================
# START SERVICES
#=================================================
ynh_print_info "Starting $app services..."

systemctl restart "$app.target"

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

ynh_print_info "Upgrade of $app completed"