#!/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)
author=$(ynh_app_setting_get --app=$app a--key=uthor)
title=$(ynh_app_setting_get --app=$app --key=title)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking 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)..."

# 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..."

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
	ynh_legacy_permissions_delete_all

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

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

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

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

	# Download, check integrity, uncompress and patch the source from app.src
	date=`date +%Y-%m-%d`
	mkdir -p $final_path
	ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="../sources/pelicanconf.py"
	ynh_replace_string --match_string="__PATH__" --replace_string="$path_url" --target_file="../sources/pelicanconf.py"
	ynh_replace_string --match_string="__AUTHOR__" --replace_string="$author" --target_file="../sources/pelicanconf.py"
	ynh_replace_string --match_string="__TITEL__" --replace_string="$title" --target_file="../sources/pelicanconf.py"
	ynh_replace_string --match_string="__AUTHOR__" --replace_string="$author" --target_file="../sources/content/first-article.md"
	ynh_replace_string --match_string="__DATE__" --replace_string="$date" --target_file="../sources/content/first-article.md"
	cp -a ../sources/. $final_path
fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:www-data "$final_path"

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# BUILD APP
#=================================================
ynh_script_progression --message="Building app..."

pushd $final_path
	ynh_secure_remove --file="$final_path/venv"
	python3 -m venv $final_path/venv
	source $final_path/venv/bin/activate
	pip install --upgrade pip
	ynh_exec_warn_less pip install pelican markdown
	pelican -s pelicanconf.py -D
popd

# Set permissions
chmod 775 -R $final_path
chown -hR www-data:www-data $final_path

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

ynh_systemd_action --service_name=nginx --action=reload

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

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