#!/bin/bash

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

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# 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)
admin=$(ynh_app_setting_get --app=$app --key=admin)
is_public=$(ynh_app_setting_get --app=$app --key=is_public)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
password=$(ynh_app_setting_get --app=$app --key=password)
group_name=$(ynh_app_setting_get --app=$app --key=group_name)
port=$(ynh_app_setting_get --app=$app --key=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)
cli_port=$(ynh_app_setting_get --app=$app --key=cli_port)
turnserver_pwd=$(ynh_app_setting_get --app=$app --key=turnserver_pwd)
architecture=$(ynh_detect_arch)

#=================================================
# CHECK VERSION
#=================================================

upgrade_type=$(ynh_check_app_version_changed)

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Ensuring downward compatibility..." --weight=1

# If final_path doesn't exist, create it
if [ -z "$final_path" ]; then
	final_path=/opt/yunohost/$app
	ynh_app_setting_set --app=$app --key=final_path --value=$final_path
fi

#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================
ynh_script_progression --message="Backing up Galène before upgrading (may take a while)..." --weight=1

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# Restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=3

ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=2

	# Create a temporary directory
	tmpdir="$(mktemp -d)"

	# Backup the config file in the temp dir
	cp -ar "$final_path/groups" "$tmpdir/groups"

	# Remove the app directory securely
	ynh_secure_remove --file="$final_path"

	ynh_setup_source --dest_dir="$final_path" --source_id="$architecture"

	# Copy the admin saved settings from tmp directory to final path	
	cp -ar "$tmpdir/groups" "$final_path/groups"

	# Remove the tmp directory securely
	ynh_secure_remove --file="$tmpdir"

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

#=================================================
# MULTINSTANCE SUPPORT
#=================================================

if [ ! -e /etc/$app/coturn.conf ]
then
    ynh_script_progression --message="Creating an independant service for Coturn..." --weight=1

    #=================================================
    # CREATE AN INDEPENDANT SERVICE FOR COTURN
    #=================================================

    # Disable default config for turnserver and create a new service
    systemctl stop coturn.service

    # Set by default the system config for coturn
    echo "" > /etc/turnserver.conf
    ynh_replace_string --match_string="TURNSERVER_ENABLED=1" --replace_string="TURNSERVER_ENABLED=0" --target_file=/etc/default/coturn

    # Set a port for each service in turnserver
    turnserver_alt_tls_port=$(ynh_find_port --port=$((turnserver_tls_port+1)))
    cli_port=$(ynh_find_port --port=5766)

    ynh_app_setting_set --app=$app --key=turnserver_alt_tls_port --value=$turnserver_alt_tls_port
    ynh_app_setting_set --app=$app --key=cli_port --value=$cli_port

    yunohost firewall allow Both $turnserver_alt_tls_port > /dev/null 2>&1

    #=================================================
    # MAKE A CLEAN LOGROTATE CONFIG
    #=================================================

    ynh_use_logrotate --logfile /var/log/$app --nonappend
fi

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

#=================================================
# SPECIFIC UPGRADE
#=================================================
# UPDATE COTURN CONFIG
#=================================================
ynh_script_progression --message="Updating Coturn config..." --weight=1

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

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

cp ../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"
then
    echo "external-ip=$public_ip4" >> "$coturn_config_path"
fi

if [ -n "$public_ip6" ] && ynh_validate_ip6 --ip_address="$public_ip6"
then
    echo "external-ip=$public_ip6" >> "$coturn_config_path"
fi

ynh_store_file_checksum --file="$coturn_config_path"

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

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

cp ../sources/Coturn_config_rotate.sh $final_path/Coturn_config_rotate.sh
ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$final_path/Coturn_config_rotate.sh"

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

cp ../conf/passwd $final_path/data/passwd
ynh_replace_string --match_string=__ADMIN__ --replace_string=$admin --target_file="$final_path/data/passwd"
ynh_replace_string --match_string=__PASSWORD__ --replace_string=$password --target_file="$final_path/data/passwd"

cp ../conf/ice-servers.json $final_path/data/ice-servers.json
ynh_replace_string --match_string=__DOMAIN__ --replace_string=$domain --target_file="$final_path/data/ice-servers.json"
ynh_replace_string --match_string=__APP__ --replace_string=$app --target_file="$final_path/data/ice-servers.json"
ynh_replace_string --match_string=__TLS_PORT__ --replace_string=$turnserver_tls_port --target_file="$final_path/data/ice-servers.json"
ynh_replace_string --match_string=__TLS_ALT_PORT__ --replace_string=$turnserver_alt_tls_port --target_file="$final_path/data/ice-servers.json"
ynh_print_OFF
ynh_replace_string --match_string=__TURNPWD__ --replace_string=$turnserver_pwd --target_file="$final_path/data/ice-servers.json"
ynh_print_ON

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Upgrading NGINX web server configuration..." --weight=3

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# UPGRADE DEPENDENCIES
#=================================================
ynh_script_progression --message="Upgrading dependencies..." --weight=1

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_script_progression --message="Making sure dedicated system user exists..." --weight=1

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

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Upgrading systemd configuration..." --weight=1

# Create a dedicated systemd config
ynh_add_systemd_config

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

# 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
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

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..." --weight=1

# # Use logrotate to manage app-specific logfile(s)
ynh_use_logrotate --non-append

#=================================================
# 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=1

ynh_systemd_action --service_name=coturn-$app.service --action=restart
ynh_systemd_action --service_name=$app --action=restart --log_path="/var/log/$app/$app.log"

#=================================================
# 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="Upgrade of Galène completed" --last