#!/bin/bash

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

source _common.sh
source ynh_redis
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)
port=$(ynh_app_setting_get --app=$app --key=port)
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)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name
db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
redis_db=$(ynh_app_setting_get --app=$app --key=redis_db)
paperless_secret_key=$(ynh_app_setting_get --app=$app --key=paperless_secret_key)
ocr_language=$(ynh_app_setting_get --app=$app --key=ocr_language)

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

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=1

ynh_systemd_action --service_name="$app" --action="stop" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name="$app-consumer" --action="stop" --log_path="/var/log/$app/$app-consumer.log"
ynh_systemd_action --service_name="$app-scheduler" --action="stop" --log_path="/var/log/$app/$app-scheduler.log"
ynh_systemd_action --service_name="$app-task-queue" --action="stop" --log_path="/var/log/$app/$app-task-queue.log"

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

# If ocr_language doesn't exist, create it
if [ -z "$ocr_language" ]; then
	ocr_language="eng"
	ynh_app_setting_set --app=$app --key=ocr_language --value=$ocr_language
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"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=1

	ynh_setup_source --dest_dir="$final_path" --keep="paperless.conf"
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..." --weight=1

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies $ocr_pkg_dependencies

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=1

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC UPGRADE
#=================================================
# INSTALL PYTHON DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing Python dependencies..."

pushd $final_path
	python3 -m venv venv
	chown -R "$app:" "$final_path"
(
	source "$final_path/venv/bin/activate"
	ynh_exec_as $app $final_path/venv/bin/pip3 install --upgrade pip setuptools wheel
	ynh_exec_as $app $final_path/venv/bin/pip3 install -r "$final_path/requirements.txt"

	# Installing NLTK data
	ynh_secure_remove --file="$final_path/nltk_data"
	mkdir -p "$final_path/nltk_data"
	chown -R "$app:" "$final_path/nltk_data"
	ynh_exec_warn_less ynh_exec_as $app $final_path/venv/bin/python3 -m nltk.downloader -d "$final_path/nltk_data" snowball_data
	ynh_exec_warn_less ynh_exec_as $app $final_path/venv/bin/python3 -m nltk.downloader -d "$final_path/nltk_data" stopwords
	ynh_exec_warn_less ynh_exec_as $app $final_path/venv/bin/python3 -m nltk.downloader -d "$final_path/nltk_data" punkt

	deactivate
)
popd

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1

ynh_add_config --template="paperless.conf.example" --destination="$final_path/paperless.conf"

chmod 400 "$final_path/paperless.conf"
chown $app:$app "$final_path/paperless.conf"

#=================================================
# SETUP THE DATABASE
#=================================================
ynh_script_progression --message="Setting up the database..." --weight=1

pushd "$final_path/src"
(
	source "$final_path/venv/bin/activate"
	ynh_exec_as $app $final_path/venv/bin/python manage.py migrate
	deactivate
)
popd

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config --service="$app" --template="systemd.service"
ynh_add_systemd_config --service="$app-consumer" --template="systemd-consumer.service"
ynh_add_systemd_config --service="$app-scheduler" --template="systemd-scheduler.service"
ynh_add_systemd_config --service="$app-task-queue" --template="systemd-task-queue.service"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1

# Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --logfile="/var/log/$app/$app.log"
ynh_use_logrotate --logfile="/var/log/$app/$app-consumer.log"
ynh_use_logrotate --logfile="/var/log/$app/$app-scheduler.log"
ynh_use_logrotate --logfile="/var/log/$app/$app-task-queue.log"

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=1

yunohost service add "$app" --log="/var/log/$app/$app.log"
yunohost service add "$app-consumer" --log="/var/log/$app/$app-consumer.log"
yunohost service add "$app-scheduler" --log="/var/log/$app/$app-scheduler.log"
yunohost service add "$app-task-queue" --log="/var/log/$app/$app-task-queue.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1

ynh_systemd_action --service_name="$app" --action="start" --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name="$app-consumer" --action="start" --log_path="/var/log/$app/$app-consumer.log"
ynh_systemd_action --service_name="$app-scheduler" --action="start" --log_path="/var/log/$app/$app-scheduler.log"
ynh_systemd_action --service_name="$app-task-queue" --action="start" --log_path="/var/log/$app/$app-task-queue.log"

#=================================================
# UPGRADE FAIL2BAN
#=================================================
#ynh_script_progression --message="Reconfiguring Fail2Ban..." --weight=1

# Create a dedicated Fail2Ban config
#ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"

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