#!/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 ../settings/scripts/experimental_helper.sh
source /usr/share/yunohost/helpers

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

ynh_clean_setup () {
# Clean installation remainings that are not handled by the remove script.
	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 settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
server_name=$(ynh_app_setting_get --app=$app --key=server_name)
path_url=$(ynh_app_setting_get --app=$app --key=path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
synapse_tls_port=$(ynh_app_setting_get --app=$app --key=synapse_tls_port)
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)
phpversion=$(ynh_app_setting_get --app=$app --key=phpversion)
synapse_db_pwd=$(ynh_app_setting_get --app=$app --key=synapse_db_pwd)
synapse_user_app_pwd=$(ynh_app_setting_get --app=$app --key=synapse_user_app_pwd)
main_domain=$(yunohost domain list --output-as json | jq -r .main)

#=================================================
# SET ALL CONSTANT
#=================================================

synapse_user="matrix-$app"
synapse_user_app="$app"
synapse_db_name="matrix_$app"
synapse_db_user="matrix_$app"
synapse_db_name="matrix_$app"
upstream_version=$(ynh_app_upstream_version)
final_www_path="/var/www/$app"
data_path="/home/yunohost.app/matrix-$app"

#=================================================
# CHECK IF THE APP CAN BE RESTORED
#=================================================
ynh_script_progression --message="Validating restoration parameters..." --weight=2

test ! -d $final_path \
	|| ynh_die --message="There is already a directory: $final_path "

#=================================================
# STANDARD RESTORATION STEPS
#=================================================
# REINSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Reinstalling dependencies..." --weight=70

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

#=================================================
# RECREATE THE DEDICATED USER
#=================================================
ynh_script_progression --message="Recreating the dedicated system user..." --weight=3

# Create the dedicated user (if not existing)
ynh_system_user_create --username=$synapse_user --home_dir=$final_path
# The format to create an user account varies depending on the version of YunoHost currently installed.
ynh_current_version=$(dpkg-query --showformat='${Version}' --show yunohost)
if $(dpkg --compare-versions "$ynh_current_version" ge "11.1"); then
    yunohost user create $synapse_user_app -F "Synapse Application" -d $domain -p "$synapse_user_app_pwd"
else
    yunohost user create $synapse_user_app -f Synapse -l Application -d $domain -p "$synapse_user_app_pwd"
fi
adduser $synapse_user ssl-cert
adduser turnserver ssl-cert

#=================================================
# RESTORE ALL CONFIG AND DATA
#=================================================

ynh_script_progression --message="Restoring directory and configuration..." --weight=10
ynh_restore
mkdir -p /etc/matrix-$app/app-service

# Check that the good python version is installed
# If not upgrade the source
ynh_script_progression --message="Check for source up to date..." --weight=5
install_sources

#=================================================
# RESTORE FAIL2BAN CONFIGURATION
#=================================================

ynh_script_progression --message="Reload Fail2Ban..." --weight=6
ynh_systemd_action --action=restart --service_name=fail2ban

#=================================================
# RESTORE THE POSTGRESQL DATABASE
#=================================================
ynh_script_progression --message="Restoring the PostgreSQL database..." --weight=13

ynh_psql_test_if_first_run
ynh_psql_create_user $synapse_db_user $synapse_db_pwd
ynh_psql_execute_as_root \
--sql="CREATE DATABASE $synapse_db_name
 ENCODING 'UTF8'
 LC_COLLATE='C'
 LC_CTYPE='C'
 template=template0
 OWNER $synapse_db_user;"
ynh_psql_execute_file_as_root --file="${YNH_CWD}/dump.sql" --database="$synapse_db_name"

#=================================================
# RESTORE SYSTEMD
#=================================================
ynh_script_progression --message="Enable systemd services" --weight=2

# systemctl daemon-reload
systemctl enable matrix-$app.service --quiet
systemctl enable coturn-$app.service --quiet

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

yunohost service add matrix-$app --log "/var/log/matrix-$app/homeserver.log" --needs_exposed_ports $synapse_tls_port
yunohost service add coturn-$app --needs_exposed_ports $turnserver_tls_port

#=================================================
# CREATE A DH FILE
#=================================================
ynh_script_progression --message="Creating a dh file..." --weight=40

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

# Make dh cert for synapse 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)
turnserver_pwd=$(ynh_app_setting_get --app=$app --key=turnserver_pwd)

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

# 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

turn_external_ip=""
if [ -n "$public_ip4" ] && ynh_validate_ip4 --ip_address="$public_ip4"
then
    turn_external_ip+="external-ip="$public_ip4%"\n"
fi

if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
then
    turn_external_ip+="external-ip="$public_ip6%"\n"
fi

ynh_add_config --template="turnserver.conf" --destination="/etc/matrix-$app/coturn.conf"

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

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

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

ynh_use_logrotate --logfile /var/log/matrix-$app

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

# WARNING : theses command are used in INSTALL, UPGRADE, RESTORE (3 times)
# For any update do it in all files
ynh_script_progression --message="Configuring file permission..."
chown $synapse_user:root -R $final_path
chmod 770 $final_path/Coturn_config_rotate.sh
chmod 700 $final_path/update_synapse_for_appservice.sh
chown $synapse_user:root -R $data_path
chown $synapse_user:root -R /var/log/matrix-$app
chown $synapse_user:root -R /etc/matrix-$app
chmod u=rwX,g=rX,o= -R /etc/matrix-$app
chmod 600 /etc/matrix-$app/$server_name.signing.key
setfacl -R -m user:turnserver:rX  /etc/matrix-$app
setfacl -R -m user:turnserver:rwX  /var/log/matrix-$app
chmod u=rwX,g=rX,o= -R $final_www_path
chown $synapse_user:root -R $final_www_path

#=================================================
# RELOAD NGINX, SYNAPSE AND COTURN
#=================================================
ynh_script_progression --message="Restarting Synapse services..." --weight=7

ynh_systemd_action --service_name=coturn-$app.service --action=restart
ynh_systemd_action --service_name=matrix-$app --action=restart --line_match="Synapse now listening on TCP port $synapse_tls_port" --log_path="/var/log/matrix-$app/homeserver.log" --timeout=300

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

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

echo "To federate this app you need to add this line in your DNS configuration:

_matrix._tcp.$domain. 3600    IN      SRV     10 0 $synapse_tls_port $domain.

You also need to open the TCP port $synapse_tls_port on your ISP box if it's not automatically done.

Your synapse server also implements a turnserver (for VoIP), to have this fully functional please read the 'Turnserver' section in the README available here: https://github.com/YunoHost-Apps/synapse_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/synapse_ynh" > mail_to_send

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

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_script_progression --message="Reloading NGINX web server..."

ynh_systemd_action --service_name=php$phpversion-fpm --action=reload
ynh_systemd_action --service_name=nginx --action=reload

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

ynh_script_progression --message="Restoration completed for $app" --last