#!/bin/bash

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

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

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================

ynh_clean_setup () {
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

domain=$YNH_APP_ARG_DOMAIN
path_url="/"
admin=$YNH_APP_ARG_ADMIN
is_public=$YNH_APP_ARG_IS_PUBLIC

admin_mail=$(ynh_user_get_info --username="$admin" --key="mail")

app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..."

final_path=/var/www/$app
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"

datadir=/home/yunohost.app/$app/data

# Register (book) web path
ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..."

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
ynh_app_setting_set --app=$app --key=admin --value=$admin

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding an available port..."

# Find an available port
port=$(ynh_find_port --port=5000)
ynh_app_setting_set --app=$app --key=port --value=$port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..."

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..."

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

#=================================================
# CREATE A POSTGRESQL DATABASE
#=================================================
ynh_script_progression --message="Creating a PostgreSQL database..."

ynh_psql_test_if_first_run
db_name=$(ynh_sanitize_dbid --db_name=$app)
db_user=$db_name
db_pwd=$(ynh_string_random)
ynh_app_setting_set --app=$app --key=db_name --value=$db_name
ynh_app_setting_set --app=$app --key=db_pwd --value=$db_pwd

# Initialize database and store postgres password for upgrade
ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..."

ynh_app_setting_set --app=$app --key=final_path --value=$final_path
# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --dest_dir="$final_path/api" --source_id="api"
ynh_setup_source --dest_dir="$final_path/front" --source_id="front"

mkdir -p $final_path/config

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

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..."

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC SETUP
#=================================================
# CREATE DATA DIRECTORY
#=================================================
ynh_script_progression --message="Creating a data directory..."

ynh_app_setting_set --app=$app --key=datadir --value=$datadir

mkdir -p $datadir
mkdir -p $datadir/{static,media,music}

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

#=================================================
# ADD A CONFIGURATION
#=================================================
ynh_script_progression --message="Adding a configuration file..."

key=$(ynh_string_random --length=45 | base64)
redis_db=$(ynh_redis_get_free_db)

ynh_app_setting_set --app=$app --key=key --value=$key
ynh_app_setting_set --app=$app --key=redis_db --value=$redis_db

ynh_add_config --template="../conf/env.prod" --destination="$final_path/config/.env"

chmod 400 "$final_path/config/.env"
chown $app:$app "$final_path/config/.env"

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

ynh_add_config --template="../conf/funkwhale.target" --destination="/etc/systemd/system/$app.target"

# Create a dedicated systemd config
ynh_add_systemd_config --service="${app}-server" --template="funkwhale-server.service"
ynh_add_systemd_config --service="${app}-worker" --template="funkwhale-worker.service"
ynh_add_systemd_config --service="${app}-beat"   --template="funkwhale-beat.service"

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

pushd $final_path
	python3 -m venv $final_path/virtualenv
	source $final_path/virtualenv/bin/activate
	pip install --upgrade pip
	pip install --upgrade setuptools
	ynh_exec_warn_less pip install wheel
	# Workaround for error AttributeError: module 'lib' has no attribute 'X509_V_FLAG_CB_ISSUER_CHECK'
	ynh_replace_string --match_string="pyOpenSSL~=20.0.1" --replace_string="pyOpenSSL~=21.0.0" --target_file="$final_path/api/requirements/base.txt"
	ynh_exec_warn_less pip install -r api/requirements.txt
popd

#=================================================
# BUILDING FUNKWHALE
#=================================================
ynh_script_progression --message="Building funkwhale..."

pushd $final_path
	source $final_path/virtualenv/bin/activate

	# needed for enabling the 'unaccent' extension
	ynh_psql_execute_as_root --sql="ALTER USER $db_user WITH SUPERUSER;" --database="$db_name"
	ynh_exec_warn_less python api/manage.py migrate
	ynh_psql_execute_as_root --sql="ALTER USER $db_user WITH NOSUPERUSER;" --database="$db_name"
	echo "from django.contrib.auth import get_user_model; User = get_user_model(); User.objects.create_superuser('$admin', '$admin_mail', 'funkwhale') " | ynh_exec_warn_less python api/manage.py shell
	echo "yes" | ynh_exec_warn_less python api/manage.py collectstatic
popd

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

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

yunohost service add "${app}-beat"
yunohost service add "${app}-server"
yunohost service add "${app}-worker"

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

# Start a systemd service
ynh_systemd_action --service_name="${app}-beat" --action="start" --log_path="systemd" --line_match="Started"
ynh_systemd_action --service_name="${app}-server" --action="start" --log_path="systemd" --line_match="Application startup complete"
ynh_systemd_action --service_name="${app}-worker" --action="start" --log_path="systemd" --line_match="ready"

#=================================================
# SETUP FAIL2BAN
#=================================================
ynh_script_progression --message="Configuring Fail2Ban..."

# Create a dedicated Fail2Ban config
ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-access.log" --failregex="<HOST>.* \"POST /api/v1/token/ HTTP/1.1\" 400 68.*$" --max_retry=5

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..."

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# Everyone can access the app.
	# The "main" permission is automatically created before the install script.
	ynh_permission_update --permission="main" --add="visitors"
fi

#=================================================
# 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="Installation of $app completed"
