#!/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)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
password=$(ynh_app_setting_get --app=$app --key=password)
port=$(ynh_app_setting_get --app=$app --key=port)
turnserver_port=$(ynh_app_setting_get --app=$app --key=turnserver_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 open, close direct access to $port in firewall
if yunohost firewall list | grep -q "\- $port$"
then
    ynh_exec_warn_less yunohost firewall disallow TCP $port
fi

# 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

if [ -z "$turnserver_port" ]; then
    turnserver_port=$(ynh_find_port --port=1194)
    ynh_app_setting_set --app=$app --key=turnserver_port --value=$turnserver_port
    ynh_exec_warn_less yunohost firewall allow Both $turnserver_port
fi

# Cleaning legacy permissions
if ynh_legacy_permissions_exists; then
    ynh_legacy_permissions_delete_all

    ynh_app_setting_delete --app=$app --key=is_public
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"

    groups="$final_path/groups"
    data="$final_path/data"

    mkdir -p "$groups"
    mkdir -p "$data"

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

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

    ynh_add_config --template="../conf/passwd" --destination="$final_path/data/passwd"
    chmod 600 $final_path/data/passwd

    ynh_add_config --template="../conf/ice-servers.json" --destination="$final_path/data/ice-servers.json"
    chmod 600 $final_path/data/ice-servers.json

	# Recreate certificates
	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
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_port=$(ynh_find_port --port=1194)
    ynh_app_setting_set --app=$app --key=turnserver_port --value=$turnserver_port
    ynh_exec_warn_less yunohost firewall allow Both $turnserver_port

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

#=================================================
# 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"

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"

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

#=================================================
# 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
ynh_system_user_create --username=turnserver
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: $final_path
chmod -R 755 $final_path
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

#=================================================
# 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 --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

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