#!/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=special_domain)
path_url=$(ynh_app_setting_get --app=$app --key=special_path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
synapse_db_pwd=$(ynh_app_setting_get --app=$app --key=synapse_db_pwd)
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)

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

synapse_user="matrix-$app"
synapse_db_name="matrix_$app"
synapse_db_user="matrix_$app"
upstream_version=$(ynh_app_upstream_version)

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

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 "

#=================================================
# STANDARD RESTORATION STEPS
#=================================================
# 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 the app main directory..."

ynh_restore_file --origin_path="$final_path"

#=================================================
# RESTORE SYNAPSE LOG
#=================================================
ynh_script_progression --message="Restoring synapse log..."

ynh_restore_file --origin_path="/var/log/matrix-$app"

#=================================================
# RESTORE FAIL2BAN CONFIGURATION
#=================================================
ynh_script_progression --message="Restoring the fail2ban configuration..." --weight=6

ynh_restore_file --origin_path="/etc/fail2ban/jail.d/$app.conf"
ynh_restore_file --origin_path="/etc/fail2ban/filter.d/$app.conf"
ynh_systemd_action --action=restart --service_name=fail2ban

#=================================================
# SPECIFIC RESTORATION
#=================================================
# 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_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=$synapse_user --home_dir=/var/lib/matrix-$app
adduser $synapse_user ssl-cert
adduser turnserver ssl-cert

#=================================================
# 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="Restoring the systemd configuration..." --weight=2

ynh_restore_file --origin_path="/etc/default/matrix-$app"
ynh_restore_file --origin_path="/etc/systemd/system/matrix-$app.service"
ynh_restore_file --origin_path="/etc/default/coturn-$app"
ynh_restore_file --origin_path="/etc/systemd/system/coturn-$app.service"

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

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

yunohost service add matrix-$app -l "/var/log/matrix-$app/homeserver.log"
yunohost service add coturn-$app

#=================================================
# 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

#=================================================
# RESTORE SYNAPSE CONFIG
#=================================================
ynh_script_progression --message="Restoring synapse configuration..."

ynh_restore_file --origin_path="/etc/matrix-$app"

#=================================================
# 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)
turnserver_pwd=$(ynh_app_setting_get --app=$app --key=turnserver_pwd)
cli_port=$(ynh_app_setting_get --app=$app --key=cli_port)

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

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

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

ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$coturn_config_path"
ynh_replace_string --match_string=__TURNPWD__ --replace_string=$turnserver_pwd --target_file="$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"

# 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"
then
    ynh_replace_string --match_string='__IPV4__' --replace_string="$public_ip4" --target_file="$coturn_config_path"
else
    ynh_replace_string --match_string='__IPV4__,' --replace_string="" --target_file="$coturn_config_path"
fi

if [[ -n "$public_ip6" ]] && ynh_valide_ip6 --ip_address="$public_ip6"
then
    ynh_replace_string --match_string='__IPV6__' --replace_string="$public_ip6" --target_file="$coturn_config_path"
else
    ynh_replace_string --match_string=',__IPV6__' --replace_string="" --target_file="$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 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 SSOWAT
#=================================================
ynh_script_progression --message="Configuring SSOwat..."

# Open access to server without a button the home
# The script "add_sso_conf.py" will just add en entry for the path "/_matrix" in the sso conf.json.persistent file in the cathegory "skipped_urls".
python3 $final_path/add_sso_conf.py || ynh_die --message="Your file /etc/ssowat/conf.json.persistent don't respect the json synaxe. Please fix the synaxe to install this app. For more information see here : https://github.com/YunoHost-Apps/synapse_ynh/issues/32"

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

ynh_use_logrotate /var/log/matrix-$app

#=================================================
# RESTORE SYNAPSE DATA
#=================================================
ynh_script_progression --message="Restoring synapse data..."

ynh_restore_file --origin_path="/var/lib/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
chown $synapse_user:root -R $final_path
chmod 770 $final_path/Coturn_config_rotate.sh
chown $synapse_user:root -R /var/lib/matrix-$app
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/$domain.signing.key
setfacl -R -m user:turnserver:rX  /etc/matrix-$app
setfacl -R -m user:turnserver:rwX  /var/log/matrix-$app

#=================================================
# 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=nginx --action=reload

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

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