#!/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=$YNH_APP_ARG_DOMAIN
path_url=$YNH_APP_ARG_PATH
is_public=$YNH_APP_ARG_IS_PUBLIC

app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..." --weight=1

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

# 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..." --weight=2

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

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding available ports..." --weight=2

# Find an available port for the backend
port_backend=$(ynh_find_port --port=3000)
ynh_app_setting_set --app=$app --key=port_backend --value=$port_backend

# Find an available port for the frontend
port_frontend=$(ynh_find_port --port=$(($port_backend+1)))
ynh_app_setting_set --app=$app --key=port_frontend --value=$port_frontend

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=20

ynh_exec_warn_less ynh_install_app_dependencies $pkg_dependencies

# Install Nodejs
ynh_exec_warn_less ynh_install_nodejs --nodejs_version=$nodejs_version

# Install Yarn
ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ stable main" --package="yarn" --key="https://dl.yarnpkg.com/debian/pubkey.gpg"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=2

# 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..." --weight=2

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

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=2

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
mkdir -p $final_path/backend
mkdir -p $final_path/frontend
git clone --depth 1 https://github.com/hedgedoc/hedgedoc -b develop $final_path/backend
git clone --depth 1 https://github.com/hedgedoc/react-client $final_path/frontend

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..." --weight=2

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# SPECIFIC SETUP
#==============================================
# INSTALL HEDGEDOC
#==============================================
ynh_use_nodejs

ynh_script_progression --message="Building HedgeDoc backend... (this will take some time and resources!)" --weight=20

pushd "$final_path/backend" || ynh_die
	ynh_exec_warn_less yarn install
popd || ynh_die

ynh_script_progression --message="Building HedgeDoc frontend... (this will take some time and resources!)" --weight=20

pushd "$final_path/frontend" || ynh_die
	ynh_exec_warn_less yarn install
	# TODO: Fails out of memory in my tests
	# Production build
	# Not sure if PORT is necessary here
	# PORT=$port_frontend REACT_APP_BACKEND_BASE_URL=http://localhost:$port_backend/ yarn build:production
popd || ynh_die

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring a systemd service..." --weight=1

ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$PATH" --target_file="../conf/backend.service"
ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$PATH" --target_file="../conf/frontend.service"

ynh_add_systemd_config --service="${app}_backend" --template="../conf/backend.service"
ynh_add_systemd_config --service="${app}_frontend" --template="../conf/frontend.service"

#=================================================
# MODIFY A CONFIG FILE
#=================================================
ynh_script_progression --message="Modifying a config file..." --weight=1

#path=${path_url:1}
ynh_add_config --template="../conf/env_backend" --destination="$final_path/backend/.env"

#=================================================
# GENERIC FINALIZATION
#=================================================
# SECURE FILES AND DIRECTORIES
#=================================================
ynh_script_progression --message="Securing files and directories..." --weight=1

# Set permissions to app files
chown -R $app:$app $final_path
chmod o-rwx $final_path

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating service in YunoHost..." --weight=2

yunohost service add "${app}_backend" --description="Collaborative Markdown editor's backend" --log="/var/log/$app/$app.log"
yunohost service add "${app}_frontend" --description="Collaborative Markdown editor's frontend" --log="/var/log/$app/$app.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=2

# Start a systemd service
ynh_systemd_action --service_name="${app}_backend" --action=start --log_path=systemd
ynh_systemd_action --service_name="${app}_frontend" --action=start --log_path=systemd

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..." --weight=1

# Make app public if necessary or protect it
if [ $is_public -eq 1 ]
then
	ynh_permission_update --permission="main" --add="visitors"
fi

#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=2

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_script_progression --message="Installation of HedgeDoc completed" --last