#!/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=$YNH_APP_ARG_IS_PUBLIC
password=$YNH_APP_ARG_PASSWORD
group_name=$YNH_APP_ARG_GROUP_NAME
group_description=$YNH_APP_ARG_GROUP_DESCRIPTION
architecture=$(ynh_detect_arch)

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=/opt/yunohost/$app
test ! -e "$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=4

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
ynh_app_setting_set --app=$app --key=group_name --value="$group_name"
ynh_app_setting_set --app=$app --key=group_description --value="$group_description"
ynh_app_setting_set --app=$app --key=password --value=$password

#=================================================
# CREATE A DH FILE
#=================================================
ynh_script_progression --message="Creating a dhparam file..." --weight=3

# WARNING : theses command are used in INSTALL, UPGRADE, RESTORE
# For any update do it in all files

# Make dhparam cert for Coturn if it doesn't exist
if [ ! -e /etc/ssl/private/dh2048.pem ]
then
    ynh_exec_warn_less openssl dhparam -out /etc/ssl/private/dh2048.pem -outform PEM -2 2048 -dsaparam
    chown root:ssl-cert /etc/ssl/private/dh2048.pem
    chmod 640 /etc/ssl/private/dh2048.pem
fi

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding an available port..." --weight=3

# Find an available port
port=$(ynh_find_port --port=8443)
turnserver_port=$(ynh_find_port --port=1194)

# Open the ports
ynh_exec_warn_less yunohost firewall allow --no-upnp TCP $port
ynh_exec_warn_less yunohost firewall allow Both $turnserver_port

# Store opened ports
ynh_app_setting_set --app=$app --key=port --value=$port
ynh_app_setting_set --app=$app --key=turnserver_port --value=$turnserver_port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=5

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=1

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="$final_path" --source_id="$architecture"

#=================================================
# CREATE DATA FOLDER
#=================================================

# Define app's data directory
data="$final_path/data"
# Create data folder
mkdir -p "$data"

#=================================================
# CREATE A SERVER CERTIFICATE
#=================================================

pushd "$final_path/data"
	ynh_exec_warn_less openssl req -newkey rsa:2048 -nodes -keyout key.pem -x509 -days 365 -out cert.pem \
	-subj "/C=/ST=/L=/O=/OU=/CN=/emailAddress="
    chmod 640 {key.pem,cert.pem}
popd

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

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Configuring system user..." --weight=3

# Create a system user
ynh_system_user_create --username=$app
ynh_system_user_create --username=turnserver
adduser turnserver ssl-cert

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

# Create a dedicated systemd config
ynh_add_systemd_config

mkdir -p /etc/$app
# Create systemd service for turnserver
cp ../conf/coturn/default_coturn /etc/default/coturn-$app
ynh_add_systemd_config --service=coturn-$app --template=coturn-galene.service

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..." --weight=1

# Create log directory
mkdir -p /var/log/$app
touch /var/log/$app/$app.log
chown $app -R /var/log/$app

# Setup logrotate
ynh_use_logrotate --logfile "/var/log/$app"

#=================================================
# SET COTURN CONFIG
#=================================================
ynh_script_progression --message="Configuring Coturn..." --weight=1

# WARNING: theses command are used in INSTALL, UPGRADE
# For any update do it in all files

# Find password for turnserver
ynh_print_OFF
turnserver_pwd=$(ynh_string_random --length=30)
ynh_app_setting_set --app=$app --key=turnserver_pwd --value=$turnserver_pwd
ynh_print_ON

coturn_config_path="/etc/$app/coturn.conf"

ynh_add_config --template="../conf/coturn/turnserver.conf" --destination="$coturn_config_path"

# Get public IP and set as external IP for coturn
# note: '|| true' is used to ignore the errors if we can't get the public ipv4 or ipv6
public_ip4="$(curl -s ip.yunohost.org)" || true
public_ip6="$(curl -s ipv6.yunohost.org)" || true

if ( [[ -n "$public_ip4" ]] && ynh_validate_ip4 --ip_address="$public_ip4" || [[ -n "$public_ip6" ]] && ynh_validate_ip6 --ip_address="$public_ip6" )
then
    echo "external-ip=${public_ip4}/${public_ip6}" >> "$coturn_config_path"
fi

ynh_store_file_checksum --file="$coturn_config_path"

#=================================================
# CREATE GROUPS FOLDER
#=================================================

# Define app's groups directory
groups="$final_path/groups"
# Create groups folder
mkdir -p "$groups"

#=================================================
# MODIFY A CONFIG FILE
#=================================================

ynh_add_config --template="../conf/passwd" --destination="$final_path/data/passwd"

ynh_add_config --template="../conf/groupname.json" --destination="$final_path/groups/$group_name.json"

ynh_add_config --template="../conf/ice-servers.json" --destination="$final_path/data/ice-servers.json"

#=================================================
# ADD SCRIPT FOR COTURN CRON AND APP SERVICE
#=================================================

# WARNING : theses command are used in INSTALL, UPGRADE
# For any update do it in all files

ynh_add_config --template="../sources/Coturn_config_rotate.sh" --destination="$final_path/Coturn_config_rotate.sh"
chmod +x $final_path/Coturn_config_rotate.sh

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

# Set permissions to app files
chown -R $app: $final_path
chmod -R 755 $final_path
chown -R $app:root /etc/$app
chown turnserver:root /etc/$app/coturn.conf
chmod -R u=rwX,g=rX,o= /etc/$app
chmod 770 $final_path/Coturn_config_rotate.sh
setfacl -R -m user:turnserver:rX  /etc/$app
setfacl -R -m user:turnserver:rwX  /var/log/$app
chmod 600 $final_path/data/passwd
chmod 600 $final_path/data/ice-servers.json

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

yunohost service add $app --description="Videoconferencing server" --log="/var/log/$app/$app.log" --needs_exposed_ports $port
yunohost service add coturn-$app --description="Coturn TURN server" --log="/var/log/$app/turnserver.log" --needs_exposed_ports $turnserver_port

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

# Start a systemd service
ynh_systemd_action --service_name=$app --action=restart --log_path="/var/log/$app/$app.log"
ynh_systemd_action --service_name=coturn-$app.service --action=restart --log_path="/var/log/$app/turnserver.log"

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..." --weight=2

# Make app public if necessary
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 Galène completed" --last