#!/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)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)

#=================================================
# CHECK VERSION
#=================================================

### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(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
#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

#
# N.B. : the followings setting migrations snippets are provided as *EXAMPLES*
# of what you may want to do in some cases (e.g. a setting was not defined on
# some legacy installs and you therefore want to initiaze stuff during upgrade)
#

# If db_name doesn't exist, create it
#if [ -z "$db_name" ]; then
#	db_name=$(ynh_sanitize_dbid --db_name=$app)
#	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
#fi

# If final_path doesn't exist, create it
if [ -z "$final_path" ]; then
	final_path=/var/www/$app
	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

mkdir -p /var/log/uwsgi/$app
chown $app:$app /var/log/uwsgi/$app
chmod -R u=rwX,g=rX,o= /var/log/uwsgi/$app

#=================================================
# 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
	
	# create a temporary directory
	tmpdir=$(mktemp -d)

	# backup the config file in the temp dir
	cp -a "$final_path/searx/settings.yml"  "$tmpdir/settings.yml"

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"

	# Copy the saved settings back to final path
	cp -a "$tmpdir/settings.yml" "$final_path/searx/settings.yml"

	# Remove the temporary directory safely
	ynh_secure_remove --file="$tmpdir"
fi

# FIXME: this should be managed by the core in the future
# Here, as a packager, you may have to tweak the ownerhsip/permissions
# such that the appropriate users (e.g. maybe www-data) can access
# files in some cases.
# But FOR THE LOVE OF GOD, do not allow r/x for "others" on the entire folder -
# this will be treated as a security issue.
chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_install_app_dependencies $pkg_dependencies

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

path_no_root=${path_url%/}
# Create a dedicated NGINX config
ynh_add_nginx_config "path_no_root"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPGRADE SEARXNG IN ITS VIRTUALENV
#=================================================
ynh_script_progression --message="Upgrading SearXNG..." --weight=2

ynh_secure_remove --file="$final_path/venv"

python3 -m venv --system-site-packages "$final_path/venv"

set +u; source $final_path/venv/bin/activate; set -u
pip3 install -U pip setuptools wheel pyyaml --no-cache-dir
pip3 install -e "$final_path"

chown -R $app: "$final_path"

#=================================================
# CONFIGURE UWSGI FOR SEARX
#=================================================
ynh_script_progression --message="Reconfiguring uWSGI for Searx..." --weight=2

# Clean old files
ynh_secure_remove --file="/etc/uwsgi/apps-enabled/$app.ini"
ynh_secure_remove --file="/etc/uwsgi/apps-available/$app.ini"
ynh_add_uwsgi_service

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

# Wait for searx to be fully started                                                         
ynh_systemd_action --service_name=uwsgi-app@$app.service --action=restart --line_match="spawned uWSGI master process" --log_path="/var/log/uwsgi/$app/$app.log"

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