#!/bin/bash

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

source _common.sh
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)
final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
db_name=$(ynh_app_setting_get --app="$app" --key=db_name)
db_user="$db_name"
port=$(ynh_app_setting_get --app="$app" --key=port)
db_pwd=$(ynh_app_setting_get --app="$app" --key=psqlpwd)
redis_db=$(ynh_app_setting_get --app="$app" --key=redis_db)
code_migration=$(ynh_app_setting_get --app="$app" --key=code_migration)

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

# If redis_db doesn't exist, create it
if [ -z "$redis_db" ]; then
	redis_db=0
	ynh_app_setting_set --app="$app" --key=redis_db --value="$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 --file="$final_path-tmp/"
	ynh_app_setting_set --app="$app" --key=code_migration --value=1
fi

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

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

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="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="$app" --key=backup_core_only --value=1

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# restore it if the upgrade fails
	ynh_clean_check_starting
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

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

# see 0.20.0: https://docs.funkwhale.audio/changelog.html#automatically-load-env-file
loadfile="$final_path/code/load_env"
if [ -e "$loadfile" ] ; then
    ynh_secure_remove --file="$loadfile"
fi

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

ynh_systemd_action --action="stop" --service_name="${app}-beat"
ynh_systemd_action --action="stop" --service_name="${app}-server"
ynh_systemd_action --action="stop" --service_name="${app}-worker"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Upgrading source files..."

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

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

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

# Create a dedicated NGINX config
ynh_add_nginx_config

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

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# 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"

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

ynh_secure_remove --file="$final_path/code/virtualenv"
virtualenv -p python3 "$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="$final_path/code/config/.env"
ynh_backup_if_checksum_is_different --file="$configfile"
cp ../conf/env.prod "$configfile"

key=$(ynh_string_random)

ynh_app_setting_set --app="$app" --key=key --value="$key"

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

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

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

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

	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

	# Delete the original thumbnails and generate new ones for
	# higher quality images
	# https://docs.funkwhale.audio/changelog.html#increased-quality-of-jpeg-thumbnails-manual-action-required
	ynh_secure_remove "$final_path/media/__sized__"
	python api/manage.py fw media generate-thumbnails
)

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================

# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum --file="$configfile"

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

cp ../conf/funkwhale.target "/etc/systemd/system/$app.target"
ynh_replace_string --match_string="__APP__"    --replace_string="$app"   --target_file="/etc/systemd/system/$app.target"

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

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

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

#=================================================
# 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"

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

yunohost service add "$app-server" --log="/var/log/$app/server.log"
yunohost service add "$app-worker" --log="/var/log/$app/worker.log"
yunohost service add "$app-beat"   --log="/var/log/$app/beat.log"

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

ynh_systemd_action --action="start" --service_name="${app}-beat"
ynh_systemd_action --action="start" --service_name="${app}-server"
ynh_systemd_action --action="start" --service_name="${app}-worker"

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

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_app_setting_set --app="$app" --key=code_migration --value=2

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

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