#!/bin/bash

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

# Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
source ../settings/scripts/_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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..." --weight=1

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
group_name=$(ynh_app_setting_get --app=$app --key=group_name)
turnserver_tls_port=$(ynh_app_setting_get --app=$app --key=turnserver_tls_port)
turnserver_alt_tls_port=$(ynh_app_setting_get --app=$app --key=turnserver_alt_tls_port)

#=================================================
# CHECK IF THE APP CAN BE RESTORED
#=================================================
ynh_script_progression --message="Validating restoration parameters..." --weight=1

ynh_webpath_available --domain=$domain --path_url=$path_url \
	|| ynh_die --message="Path not available: ${domain}${path_url}"
test ! -d $final_path \
	|| ynh_die --message="There is already a directory: $final_path "

#=================================================
# SPECIFIC RESTORATION
#=================================================
# REINSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Reinstalling dependencies..." --weight=1

# Define and install dependencies
ynh_install_app_dependencies $pkg_dependencies

#=================================================
# RESTORE THE NGINX CONFIGURATION
#=================================================

ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"

#=================================================
# RESTORE THE APP MAIN DIR
#=================================================
ynh_script_progression --message="Restoring Galène main directory..." --weight=1

ynh_restore_file --origin_path="$final_path"
ynh_restore_file --origin_path="/etc/$app"
ynh_restore_file --origin_path="/var/log/$app"

#=================================================
# RECREATE THE DEDICATED USER
#=================================================
ynh_script_progression --message="Recreating the dedicated system user..." --weight=2

# Create the dedicated user (if not existing)
ynh_system_user_create --username=$app
ynh_system_user_create --username=turnserver
adduser turnserver ssl-cert

#=================================================
# RESTORE SYSTEMD
#=================================================
ynh_script_progression --message="Restoring the systemd configuration..." --weight=1

ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
ynh_restore_file --origin_path="/etc/default/coturn-$app"
ynh_restore_file --origin_path="/etc/systemd/system/coturn-$app.service"
systemctl enable $app.service --quiet
systemctl enable coturn-$app.service --quiet

#=================================================
# 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/$app.log"
yunohost service add coturn-$app --needs_exposed_ports $turnserver_tls_port

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=3

ynh_systemd_action --service_name=$app --action=start --log_path="/var/log/$app/$app.log"
yunohost service add coturn-$app --needs_exposed_ports $turnserver_tls_port

#=================================================
# 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 Galène 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

#=================================================
# RECONFIGURE THE TURNSERVER
#=================================================
ynh_script_progression --message="Reconfiguring Coturn..." --weight=23

# To be sure that at the restoration the IP address in coturn config is the same as the real address we remake the coturn config

# Retrieve specific settings
turnserver_tls_port=$(ynh_app_setting_get --app=$app --key=turnserver_tls_port)
turnserver_alt_tls_port=$(ynh_app_setting_get --app=$app --key=turnserver_alt_tls_port)
cli_port=$(ynh_app_setting_get --app=$app --key=cli_port)
ynh_print_OFF
turnserver_pwd=$(ynh_app_setting_get --app=$app --key=turnserver_pwd)
ynh_print_ON

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

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

cp ../settings/conf/coturn/turnserver.conf "$coturn_config_path"

ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$coturn_config_path"
ynh_replace_string --match_string=__DOMAIN__ --replace_string=$domain --target_file="$coturn_config_path"
ynh_replace_string --match_string=__TLS_PORT__ --replace_string=$turnserver_tls_port --target_file="$coturn_config_path"
ynh_replace_string --match_string=__TLS_ALT_PORT__ --replace_string=$turnserver_alt_tls_port --target_file="$coturn_config_path"
ynh_replace_string --match_string=__CLI_PORT__ --replace_string=$cli_port --target_file="$coturn_config_path"
ynh_print_OFF
ynh_replace_string --match_string=__TURNPWD__ --replace_string=$turnserver_pwd --target_file="$coturn_config_path"
ynh_print_ON

# 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="$(curl ip.yunohost.org)" || true
public_ip6="$(curl 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"

#=================================================
# OPEN THE PORT
#=================================================

# Ouvre le port dans le firewall
ynh_exec_warn_less yunohost firewall allow Both $turnserver_tls_port
ynh_exec_warn_less yunohost firewall allow Both $turnserver_alt_tls_port

#=================================================
# RESTORE USER RIGHTS
#=================================================
ynh_script_progression --message="Restoring permissions..." --weight=1

# Restore permissions on app files
# Set permissions on app files
chown -R $app:root $final_path
chmod -R 755 $final_path
chown -R $app:root /var/log/$app
chown -R $app:root /etc/$app
chown turnserver:root $coturn_config_path
chmod -R u=rwX,g=rX,o= /etc/$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

#=================================================
# RESTORE THE LOGROTATE CONFIGURATION
#=================================================

ynh_restore_file --origin_path="/etc/logrotate.d/$app"

#=================================================
# SEND A README FOR THE ADMIN
#=================================================

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

echo "Galène also implements a TURN server (for VoIP), to have this fully functional please read the 'Turnserver' section in the README available here: https://github.com/YunoHost-Apps/galene_ynh .

If you're facing an issue or want to improve this app, please open a new issue in this project: https://github.com/YunoHost-Apps/galene_ynh" > mail_to_send

ynh_send_readme_to_admin --app_message="mail_to_send" --type="restore"

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX AND PHP-FPM
#=================================================
ynh_script_progression --message="Reloading NGINX web server..." --weight=1

ynh_systemd_action --service_name=nginx --action=reload

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

ynh_script_progression --message="Restoration completed for Galène" --last