#!/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=$(ynh_app_setting_get --app=$app --key=path)
admin=$(ynh_app_setting_get --app=$app --key=admin)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
used_forge=$(ynh_app_setting_get --app=$app --key=used_forge)
forge_username=$(ynh_app_setting_get --app=$app --key=forge_username)
forge_token=$(ynh_app_setting_get --app=$app --key=forge_token)
redis_db=$(ynh_app_setting_get --app=$app --key=redis_db)

admin_mail=$(ynh_user_get_info --username="$admin" --key=mail)
key=$(ynh_string_random --length=50)

#=================================================
# CHECK 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=40

# 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 systemd services..." --weight=5

ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/weblate.log" --line_match="goodbye to uWSGI"
ynh_systemd_action --service_name="$app-celery" --action="stop" --log_path="systemd" --line_match="Stopped"

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

if ynh_legacy_permissions_exists
then
	ynh_legacy_permissions_delete_all

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

if [[ -d "$final_path/bin/" ]]
then
	ynh_secure_remove --file="$final_path/bin/"
fi

# (<3.8) log cleanups
if [[ -e "/var/log/uwsgi/app/$app" ]]
then
    ynh_systemd_action --service_name=$app --action="stop"
    ynh_systemd_action --service_name="$app-celery" --action="stop"
	ynh_secure_remove --file="/var/log/uwsgi/app/$app"
	ynh_secure_remove --file="/var/log/$app-celery"
fi

# If used_forge, forge_username, forge_token don't exist, create them
if [ -z "$used_forge" ]; then
	used_forge="GitHub"
	forge_username=$(ynh_app_setting_get --app=$app --key=github_account)
	forge_token=$(ynh_app_setting_get --app=$app --key=github_token)
	ynh_app_setting_set --app=$app --key=used_forge --value=$used_forge
	ynh_app_setting_set --app=$app --key=forge_username --value=$forge_username
	ynh_app_setting_set --app=$app --key=forge_token --value=$forge_token
fi

#=================================================
# 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" --use_shell

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

ynh_exec_warn_less ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=3

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# INSTALL XXHASH
#=================================================
ynh_script_progression --message="Installing xxHash..."

tempdir="$(mktemp -d)"
ynh_setup_source --dest_dir=$tempdir --source_id="libxxhash"
pushd $tempdir
	make
	make install
popd
ynh_secure_remove --file="$tempdir"

#=================================================
# CONFIGURE HUB
#=================================================

if [ $used_forge = "GitHub" ] ; then
	ynh_script_progression --message="Configure hub..." --weight=1
	
	#mkdir "$final_path/.config/"
	ynh_add_config --template="../conf/hub_config" --destination="$final_path/.config/hub"

	cat <<EOF > "$final_path/.bashrc"
	eval "$(hub alias -s /bin/bash)"
EOF
fi

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=2

ynh_add_config --template="../conf/uwsgi.ini" --destination="/etc/uwsgi/apps-available/$app.ini"

ynh_add_config --template="../conf/celery-weblate" --destination="$final_path/celery-weblate"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..." --weight=3

ynh_add_systemd_config --service=$app --template="weblate.service"
ynh_add_systemd_config --service="$app-celery" --template="celery-weblate.service"

#=================================================
# UPGRADE WEBLATE
#=================================================

upgrade() {
	new_version=$1
	settings_template=$2
	#=================================================
	# PIP INSTALLATION
	#=================================================
	ynh_script_progression --message="Install weblate using PIP..." --weight=15

	ynh_secure_remove --file="${final_path}/venv"
	virtualenv --python=python3 "${final_path}/venv"
	chown -R $app: "$final_path"

	#run source in a 'sub shell'
	(
		set +o nounset
		source "${final_path}/venv/bin/activate"
		set -o nounset
		cd "${final_path}"

		sudo --user=$app $final_path/venv/bin/pip install --upgrade pip setuptools wheel pkgconfig xxhash

		# Read the "Note" section in https://docs.weblate.org/en/weblate-4.11/admin/install/venv-debian.html#python-modules
		sudo --user=$app $final_path/venv/bin/pip install --force-reinstall --no-binary :all: cffi
		# Still needed with latest version of weblate?
		sudo --user=$app $final_path/venv/bin/pip install --upgrade Weblate=="$new_version"
		sudo --user=$app $final_path/venv/bin/pip install psycopg2-binary ruamel.yaml aeidon phply
		#pip install pytz python-bidi PyYaML Babel pyuca pylibravatar py3dns psycopg2-binary phply django-redis hiredis aeidon ruamel.yaml
		# specific to YunoHost package:
		sudo --user=$app $final_path/venv/bin/pip install django_sendmail_backend
	)

	#=================================================
	# MODIFY A CONFIG FILE
	#=================================================
	ynh_script_progression --message="Create weblate configuration file..." --weight=2
	# save old settings file
	settings="$final_path/venv/lib/$weblate_pypath/site-packages/weblate/settings.py"
	path_url="${path_url%/}"

	set_forge_variables

	ynh_add_config --template="../conf/settings.py" --destination="$settings"

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

	# Recalculate and store the config file checksum into the app settings
	ynh_store_file_checksum --file="$settings"

	touch "$final_path/local_settings.py"
	ln -sf "$final_path/local_settings.py" "$final_path/venv/lib/$weblate_pypath/site-packages/weblate/local_settings.py"

	#=================================================
	# MIGRATE WEBLATE
	#=================================================
	ynh_script_progression --message="Run migration scripts..." --weight=10

	ynh_systemd_action --service_name="$app-celery" --action="start"

	(
		set +o nounset
		source "${final_path}/venv/bin/activate"
		set -o nounset
		export DJANGO_SETTINGS_MODULE="weblate.settings"
		cd "${final_path}"

		sudo --user=$app $final_path/venv/bin/weblate migrate --noinput
		sudo --user=$app $final_path/venv/bin/weblate collectstatic --noinput
		sudo --user=$app $final_path/venv/bin/weblate setuplang
		sudo --user=$app $final_path/venv/bin/weblate setupgroups
		sudo --user=$app $final_path/venv/bin/weblate compilemessages
		
		# Check the configuration
		# This may fail in some cases with errors, etc., but the app works and the user can fix issues later.
		if [ "$new_version" == "$(ynh_app_upstream_version)" ]; then
			sudo --user=$app $final_path/venv/bin/weblate check --deploy || true
		fi
	)

	ynh_systemd_action --service_name="$app-celery" --action="stop"
}

file_version="${final_path}/venv/lib/$weblate_pypath/site-packages/weblate/__init__.py"
if [ -e $file_version ]
then
	current_version=$(cat $file_version | grep "^VERSION = " | grep -o "[0-9].[0-9]" | head -n1 | cut -d"." -f1)
	if [ -z "$current_version" ]
	then
		file_version="${final_path}/venv/lib/$weblate_pypath/site-packages/weblate/utils/version.py"
		current_version=$(cat $file_version | grep "^VERSION = " | grep -o "[0-9].[0-9]" | head -n1 | cut -d"." -f1)
	fi
else
	current_version=3
fi

ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name

if [ "$current_version" -lt "4" ]
then
	upgrade "4.1.1" "../conf/settings.4.1.1.py"
fi

upgrade $(ynh_app_upstream_version) "../conf/settings.py"

# Set right permissions for curl installation
mkdir -p "$final_path/avatar-cache"
chown -R $app: "$final_path"
chown "$app:www-data" "$final_path"
chown -R "$app:www-data" "$final_path/data"

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"

#=================================================
# GENERIC FINALIZATION
#=================================================
# 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=2

yunohost service add $app --log="/var/log/$app/weblate.log"
yunohost service add "$app-celery" --log="/var/log/$app/weblate-celery-w1.log"

#=================================================
# START SYSTEMD SERVICES
#=================================================
ynh_script_progression --message="Starting systemd services..." --weight=5

ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/weblate.log" --line_match="spawned uWSGI"
ynh_systemd_action --service_name="$app-celery" --action="start" --log_path="/var/log/$app/weblate-celery-celery.log" --line_match="mingle: all alone"

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