#!/bin/bash

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

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..."

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)
is_public=$(ynh_app_setting_get --app="$app" --key=is_public)
public_path=$(ynh_app_setting_get --app="$app" --key=public_path)
final_path=$(ynh_app_setting_get --app="$app" --key=final_path)
log_path=$(ynh_app_setting_get --app="$app" --key=log_path)

db_pwd=$(ynh_app_setting_get --app="$app" --key=psqlpwd)
admin_mail=$(ynh_user_get_info "$admin" mail)
redis_db=$(ynh_app_setting_get --app="$app" --key=redis_db)

#=================================================
# 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 () {
	# 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"

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

# Create a dedicated nginx config
# https://github.com/YunoHost/yunohost/blob/dev/data/helpers.d/nginx
ynh_add_nginx_config "public_path" "port"

#=================================================
# SPECIFIC UPGRADE
#=================================================
# Update dependencies
#=================================================
ynh_script_progression --message="Upgrading dependencies..."

ynh_exec_warn_less ynh_install_app_dependencies "$pkg_dependencies"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..."

# Create a system user
ynh_system_user_create --username="$app" --home_dir="$final_path" --use_shell

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

ynh_add_systemd_config --service="$app" --template="pyinventory.service"

#=================================================
# UPGRADE PYINVENTORY
#=================================================

ynh_script_progression --message="Install pyinventory using PIP..." --weight=15

virtualenv --python=python3 "${final_path}/venv"
sudo chown -R "$app" "$final_path"

#run source in a 'sub shell'
(
  set +o nounset
  source "${final_path}/venv/bin/activate"
  set -o nounset
  sudo -u $app $final_path/venv/bin/pip install --upgrade pip
  sudo -u $app $final_path/venv/bin/pip install --upgrade setuptools wheel psycopg2-binary
  sudo -u $app $final_path/venv/bin/pip install --upgrade pyinventory=="$pyinventory_version"
)

#=================================================
# copy config files
# ================================================
ynh_script_progression --message="Create pyinventory configuration file..."

gunicorn_conf="$final_path/gunicorn.conf.py"
ynh_backup_if_checksum_is_different --file="$gunicorn_conf"
cp "../conf/gunicorn.conf.py" "$gunicorn_conf"
ynh_replace_string --match_string="__FINAL_HOME_PATH__" --replace_string="$final_path" --target_file="$gunicorn_conf"
ynh_replace_string --match_string="__LOG_FILE__" --replace_string="$log_file" --target_file="$gunicorn_conf"
ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$gunicorn_conf"
ynh_store_file_checksum --file="$gunicorn_conf"

ynh_backup_if_checksum_is_different --file="$final_path/manage.py"
cp ../conf/manage.py "$final_path/manage.py"
chmod +x "$final_path/manage.py"

ynh_backup_if_checksum_is_different --file="$final_path/wsgi.py"
cp ../conf/wsgi.py "$final_path/wsgi.py"

# save old settings file
settings="$final_path/ynh_pyinventory_settings.py"
ynh_backup_if_checksum_is_different --file="$settings"

cp "../conf/ynh_pyinventory_settings.py" "$settings"

ynh_replace_string --match_string="__APP__" --replace_string="$app" --target_file="$settings"
ynh_replace_string --match_string="__DB_PWD__" --replace_string="$db_pwd" --target_file="$settings"
ynh_replace_string --match_string="__ADMIN__" --replace_string="$admin" --target_file="$settings"
ynh_replace_string --match_string="__ADMINMAIL__" --replace_string="$admin_mail" --target_file="$settings"
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$settings"
ynh_replace_string --match_string="__FINAL_HOME_PATH__" --replace_string="$final_path" --target_file="$settings"
ynh_replace_string --match_string="__FINAL_WWW_PATH__" --replace_string="$public_path" --target_file="$settings"
ynh_replace_string --match_string="__LOG_FILE__" --replace_string="$log_file" --target_file="$settings"
ynh_replace_string --match_string="__REDIS_DB__" --replace_string="$redis_db" --target_file="$settings"

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

touch "$final_path/local_settings.py"

ynh_urls="$final_path/ynh_urls.py"
ynh_backup_if_checksum_is_different --file="$ynh_urls"
cp "../conf/ynh_urls.py" "$ynh_urls"
ynh_replace_string --match_string="__PATH_URL__" --replace_string="$path_url" --target_file="$ynh_urls"
ynh_store_file_checksum --file="$ynh_urls"

#=================================================
# MIGRATE PYINVENTORY
#=================================================
ynh_script_progression --message="migrate/collectstatic/createadmin..." --weight=10

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

  # Just for debugging:
  ./manage.py diffsettings

	./manage.py migrate --no-input
	./manage.py collectstatic --no-input
	echo "from django.contrib.auth import get_user_model; get_user_model().objects.create_superuser('$admin', '$admin_mail', 'pyinventory')" | ./manage.py shell

	# Check the configuration
	# This may fail in some cases with errors, etc., but the app works and the user can fix issues later.
	./manage.py check --deploy || true
)

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

# 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..."

yunohost service add "$app" --log "${log_file}"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================

# Set permissions to app files
sudo chown -R "$app" "$log_path"
sudo chown -R "$app" "$public_path"
sudo chown -R "$app" "$final_path"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Upgrading SSOwat configuration..."

# Make app public if necessary
if [ "$is_public" -eq 1 ]
then
	# unprotected_uris allows SSO credentials to be passed anyway.
	ynh_app_setting_set --app="$app" --key=unprotected_uris --value="/"
fi

#=================================================
# Start pyinventory via systemd
#=================================================
ynh_script_progression --message="Starting PyInventory's services..." --weight=5

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

#=================================================
# 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" --last