#!/bin/bash

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

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

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

upgrade_type=$(ynh_check_app_version_changed)

if ynh_compare_current_package_version --comparison le --version "4.1.5~ynh2"; then
	upgrade_from_opt=true
else
	upgrade_from_opt=false
fi

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================

if [[ "$upgrade_from_opt" == "false" ]]; then
	ynh_script_progression --message="Stopping a systemd service..." --weight=1

	ynh_systemd_action --service_name=$app --action="stop"
fi

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


# MIGRATION: Remove old code (from pre-4.1.5 versions, not using venv)
if [[ "$upgrade_from_opt" == "true" ]]; then

	# Remove legacy install dir
	ynh_secure_remove /opt/yunohost/ihatemoney

	# Remove legacy Supervisor config
	rm -f /etc/supervisor/conf.d/ihatemoney.conf

	if [ -e /etc/ihatemoney/settings.py ]; then
		# Strip out the no longer used part of the settings
		python3 -c "d = open('/etc/ihatemoney/settings.py').read().replace('try:\n    from settings import *\nexcept ImportError:\n    pass\n', ''); open('/etc/ihatemoney/settings.py', 'w').write(d)"
		# Rename
		mv /etc/ihatemoney/settings.py "/etc/ihatemoney/ihatemoney.cfg"
	fi

	for old_file in "/etc/ihatemoney/ihatemoney.cfg" "/etc/$app/gunicorn.conf.py"; do
		ynh_backup_if_checksum_is_different --file="$old_file"
		ynh_delete_file_checksum --file="$old_file"
	done

	install_dir=/var/www/$app
 	ynh_app_setting_set --app=$app --key=install_dir --value=$install_dir

	db_name=ihatemoney
	db_user=$db_name
 	ynh_app_setting_set --app=$app --key=db_name --value=$db_name
fi

# If secret_key doesn't exist, create it
if [ -z "${secret_key:-}" ]; then
	secret_key=$(ynh_string_random --length=32)
	ynh_app_setting_set --app=$app --key=secret_key --value=$secret_key
fi

# If hashed_password doesn't exist, create it
if [ -z "${hashed_password:-}" ] && [ test -f "${install_dir}/venv/bin/activate" ]; then
	password=$(ynh_string_random --length=16)
	#run source in a 'sub shell'
	(
		set +o nounset
		source "${install_dir}/venv/bin/activate"
		set -o nounset
		python3 ../conf/hash_generator.py $password > ${install_dir}/key.txt
	)

	hashed_password=$(cat $install_dir/key.txt)
	ynh_secure_remove --file="$install_dir/key.txt"
 	ynh_app_setting_set --app=$app --key=hashed_password --value=$hashed_password
fi

if [ ! -d "/var/log/$app" ]; then
	# Configure log directory
	mkdir -p "/var/log/$app"
	chown -R $app:$app "/var/log/$app"
fi


#=================================================
# SPECIFIC UPGRADE
#=================================================
# BUILD VENV
#=================================================
ynh_script_progression --message="Building venv..." --weight=6

ynh_secure_remove --file="$install_dir/venv"
__ynh_python_venv_setup --venv_dir="$install_dir/venv" --packages "${pip_dependencies[*]}"
python_venv_site_packages=$(__ynh_python_venv_get_site_packages_dir -d "$install_dir/venv")

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

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

# Create a dedicated NGINX config
## Needs $python_venv_site_packages
ynh_add_nginx_config

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

ynh_add_config --template="../conf/gunicorn.conf.py" --destination="$install_dir/gunicorn.conf.py"
chmod 640 "$install_dir/gunicorn.conf.py"
chown $app:$app "$install_dir/gunicorn.conf.py"

# Allows to comment some config lines if not using sub path
sub_path_only="$(if [[ "$path" == "/" ]]; then echo '# ' ; else echo ''; fi)"

ynh_add_config --template="../conf/ihatemoney.cfg" --destination="$install_dir/ihatemoney.cfg"
chmod 640 "$install_dir/ihatemoney.cfg"
chown $app:$app "$install_dir/ihatemoney.cfg"

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

# Create a dedicated systemd config
ynh_add_systemd_config

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

yunohost service add $app --description="$app daemon for IHateMoney" --log=systemd

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

ynh_systemd_action --service_name=$app --action="start" --line_match="Listening at"
wait_gunicorn_start

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

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