#!/bin/bash

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

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

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

ynh_clean_setup () {
	### Remove this function if there's nothing to clean before calling the remove script.
	true
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# RETRIEVE ARGUMENTS FROM THE MANIFEST
#=================================================

domain=$YNH_APP_ARG_DOMAIN
path_url=$YNH_APP_ARG_PATH
admin=$YNH_APP_ARG_ADMIN
is_public=$YNH_APP_ARG_IS_PUBLIC

### If it's a multi-instance app, meaning it can be installed several times independently
### The id of the app as stated in the manifest is available as $YNH_APP_ID
### The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2"...)
### The app instance name is available as $YNH_APP_INSTANCE_NAME
###    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
###    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
###    - ynhexample__{N} for the subsequent installations, with N=3,4...
### The app instance name is probably what interests you most, since this is
### guaranteed to be unique. This is a good unique identifier to define installation path,
### db names...
app=$YNH_APP_INSTANCE_NAME

#=================================================
# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
#=================================================
ynh_script_progression --message="Validating installation parameters..." --weight=1

### If the app uses NGINX as web server (written in HTML/PHP in most cases), the final path should be "/var/www/$app".
### If the app provides an internal web server (or uses another application server such as uWSGI), the final path should be "/opt/yunohost/$app"
final_path=/opt/yunohost/$app
test ! -e "$final_path" || ynh_die --message="This path already contains a folder"

# Register (book) web path
ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_script_progression --message="Storing installation settings..." --weight=1

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=path --value=$path_url
ynh_app_setting_set --app=$app --key=admin --value=$admin

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_script_progression --message="Finding available ports..." --weight=1

### Use these lines if you have to open a port for the application
### `ynh_find_port` will find the first available port starting from the given port.

# Find available ports
guacd_port=$(ynh_find_port --port=4822)
ynh_app_setting_set --app=$app --key=guacd_port --value=$guacd_port
port=$(ynh_find_port --port=8080)
ynh_app_setting_set --app=$app --key=port --value=$port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_script_progression --message="Installing dependencies..." --weight=1

### `ynh_install_app_dependencies` allows you to add any "apt" dependencies to the package.
### Those deb packages will be installed as dependencies of this package.

# Guacamole depends on Apache Tomcat. 
# But installing Tomcat from the Debian repos automatically enables and starts it.
# So we stop and disable it, unless Tomcat was already enabled or started by the user beforehand

tomcat_enabled=""
tomcat_active=""
if [ "$(systemctl cat tomcat9 --quiet)" ]; then
	if (systemctl is-enabled tomcat9 --quiet); then
		tomcat_enabled=1
	fi
	if (systemctl is-active tomcat9 --quiet); then
		tomcat_active=1
	fi
fi

ynh_install_app_dependencies $pkg_dependencies

if [ ! $tomcat_enabled ]; then
	systemctl disable tomcat9 --quiet
fi
if [ ! $tomcat_active ]; then
	systemctl stop tomcat9 --quiet
fi

#=================================================
# CREATE A MYSQL DATABASE
#=================================================
ynh_script_progression --message="Creating a MySQL database..." --weight=1

### Use these lines if you need a database for the application.
### `ynh_mysql_setup_db` will create a database, an associated user and a ramdom password.
### The password will be stored as 'mysqlpwd' into the app settings,
### and will be available as $db_pwd
### If you're not using these lines:
###		- Remove the section "BACKUP THE MYSQL DATABASE" in the backup script
###		- Remove also the section "REMOVE THE MYSQL DATABASE" in the remove script
###		- As well as the section "RESTORE THE MYSQL DATABASE" in the restore script

db_name=$(ynh_sanitize_dbid --db_name=$app)
db_user=$db_name
ynh_app_setting_set --app=$app --key=db_name --value=$db_name
ynh_mysql_setup_db --db_user=$db_user --db_name=$db_name

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCES
#=================================================
ynh_script_progression --message="Setting up source files..." --weight=3

### `ynh_setup_source` is used to install an app from a zip or tar.gz file,
### downloaded from an upstream source, like a git repository.
### `ynh_setup_source` use the file conf/app.src

ynh_app_setting_set --app=$app --key=final_path --value=$final_path
# Download, check integrity, uncompress and patch the source from app.src
ynh_setup_source --source_id="server" --dest_dir="$final_path/.guacd-src"

tomcat_guac_dir="$path_url"
if [ "$path_url" == "/" -o -z "$path_url" ]; then
	tomcat_guac_dir="ROOT"
fi

ynh_setup_source --source_id="client" --dest_dir="$final_path/var/lib/tomcat9/webapps/$tomcat_guac_dir"

ynh_setup_source --source_id="auth-ldap" --dest_dir="$final_path/etc/guacamole/extensions/ldap"
mv "$final_path/etc/guacamole/extensions/ldap/guacamole-auth-ldap-1.3.0.jar" "$final_path/etc/guacamole/extensions/guacamole-auth-ldap.jar"
ynh_secure_remove --file="$final_path/etc/guacamole/extensions/ldap"

ynh_setup_source --source_id="auth-header" --dest_dir="$final_path/etc/guacamole/extensions/header"
mv "$final_path/etc/guacamole/extensions/header/guacamole-auth-header-1.2.0.jar" "$final_path/etc/guacamole/extensions/guacamole-auth-header.jar"
ynh_secure_remove --file="$final_path/etc/guacamole/extensions/header"

ynh_setup_source --source_id="auth-jdbc" --dest_dir="$final_path/etc/guacamole/extensions/jdbc"
mv "$final_path/etc/guacamole/extensions/jdbc/mysql/guacamole-auth-jdbc-mysql-1.3.0.jar" "$final_path/etc/guacamole/extensions/guacamole-auth-jdbc-mysql.jar"
mv "$final_path/etc/guacamole/extensions/jdbc/mysql/schema" "$final_path/etc/guacamole/extensions/mysql-schema"
ynh_secure_remove --file="$final_path/etc/guacamole/extensions/jdbc"

ynh_setup_source --source_id="mariadb-java-client" --dest_dir="$final_path/etc/guacamole/lib/"
mv "$final_path/etc/guacamole/lib/mariadb-java-client-2.7.2.jar" "$final_path/etc/guacamole/lib/mariadb-java-client.jar"

ynh_setup_source --source_id="tomcat9_deb" --dest_dir="$final_path/"
pushd "$final_path" || ynh_die
	ar x "$final_path/tomcat9_9.0.31-1~deb10u3_all.deb" "data.tar.xz"
popd || ynh_die
ynh_secure_remove --file="$final_path/tomcat9_9.0.31-1~deb10u3_all.deb"
mkdir -p "$final_path/tomcat9-data"
tar -C "$final_path/tomcat9-data" -xJf "$final_path/data.tar.xz"
cp -r "$final_path/tomcat9-data/usr/share/tomcat9/etc" -T "$final_path/etc/tomcat9/"
cp -r "$final_path/tomcat9-data/etc/tomcat9/" -T "$final_path/etc/tomcat9/" 
ynh_secure_remove --file="$final_path/data.tar.xz"
ynh_secure_remove --file="$final_path/tomcat9-data"

#=================================================
# FINISH SETTING UP DATABASE
#=================================================
ynh_script_progression --message="Setting up database files..." --weight=2

ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database="$db_name" < "$final_path/etc/guacamole/extensions/mysql-schema/001-create-schema.sql"
ynh_replace_string --match_string="guacadmin" --replace_string="$admin" -f "$final_path/etc/guacamole/extensions/mysql-schema/002-create-admin-user.sql"
ynh_replace_string --match_string="CA458A7D494E3BE824F5E1E175A1556C0F8EEF2C2D7DF3633BEC4A29C4411960" --replace_string="$(hexdump -n 32 -e '4/4 "%08X"' /dev/urandom)" -f "$final_path/etc/guacamole/extensions/mysql-schema/002-create-admin-user.sql"
ynh_replace_string --match_string="FE24ADC5E11E2B25288D1704ABE67A79E342ECC26064CE69C5B3177795A82264" --replace_string="$(hexdump -n 32 -e '4/4 "%08X"' /dev/urandom)" -f "$final_path/etc/guacamole/extensions/mysql-schema/002-create-admin-user.sql"
ynh_mysql_connect_as --user=$db_user --password="$db_pwd" --database="$db_name" < "$final_path/etc/guacamole/extensions/mysql-schema/002-create-admin-user.sql"
ynh_secure_remove --file="$final_path/etc/guacamole/extensions/mysql-schema"

#=================================================
# NGINX CONFIGURATION
#=================================================
ynh_script_progression --message="Configuring NGINX web server..." --weight=1

### `ynh_add_nginx_config` will use the file conf/nginx.conf

# Create a dedicated NGINX config
ynh_add_nginx_config

#=================================================
# CREATE DEDICATED USERS
#=================================================
ynh_script_progression --message="Configuring system users..." --weight=1

# Create system users
ynh_system_user_create --username="$app-guacd"
ynh_system_user_create --username="$app-tomcat"

#=================================================
# SPECIFIC SETUP
#=================================================
# COMPILE GUACD
#=================================================
ynh_script_progression --message="Compiling guacd..." --weight=30

pushd "$final_path/.guacd-src" || ynh_die
	./configure --enable-allow-freerdp-snapshots --prefix="$final_path" --datadir="$final_path" --with-freerdp-plugin-dir="$final_path/lib/x86_64-linux-gnu/freerdp2"
	make
	make install
popd || ynh_die

#=================================================
# SETUP TOMCAT
#=================================================

mkdir -p "$final_path/etc/"
ln -s "$final_path/etc/tomcat9" "$final_path/var/lib/tomcat9/conf"
ln -s "/var/log/$app/tomcat/" "$final_path/var/lib/tomcat9/logs"
ln -s "/var/cache/$app-tomcat9" "$final_path/var/lib/tomcat9/work"

#=================================================
# CREATE LOG DIRS
#=================================================
mkdir -p "/var/log/$app/tomcat/" "/var/log/$app/guacd/" "/var/log/$app/tomcat/"

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_script_progression --message="Configuring systemd services..." --weight=1

### `ynh_systemd_config` is used to configure a systemd script for an app.
### It can be used for apps that use sysvinit (with adaptation) or systemd.
### Have a look at the app to be sure this app needs a systemd script.
### `ynh_systemd_config` will use the file conf/systemd.service
### If you're not using these lines:
###		- You can remove those files in conf/.
###		- Remove the section "BACKUP SYSTEMD" in the backup script
###		- Remove also the section "STOP AND REMOVE SERVICE" in the remove script
###		- As well as the section "RESTORE SYSTEMD" in the restore script
###		- And the section "SETUP SYSTEMD" in the upgrade script

# Create dedicated systemd configs
ynh_add_systemd_config --service="$app-guacd" --template="guacd.service"  -v guacd_port
ynh_add_systemd_config --service="$app-tomcat" --template="tomcat.service"

#=================================================
# ADD CONFIGURATIONS
#=================================================

### You can add specific configuration files.
###
### Typically, put your template conf file in ../conf/your_config_file
### The template may contain strings such as __FOO__ or __FOO_BAR__,
### which will automatically be replaced by the values of $foo and $foo_bar
###
### ynh_add_config will also keep track of the config file's checksum,
### which later during upgrade may allow to automatically backup the config file
### if it's found that the file was manually modified
###
### Check the documentation of `ynh_add_config` for more info.

ynh_add_config --template="guacamole.properties" --destination="$final_path/etc/guacamole/guacamole.properties"

### For more complex cases where you want to replace stuff using regexes,
### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
### When doing so, you also need to manually call ynh_store_file_checksum
###
ynh_replace_string --match_string="8080" --replace_string="$port" --target_file="$final_path/etc/tomcat9/server.xml"

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

### For security reason, any app should set the permissions to root: before anything else.
### Then, if write authorization is needed, any access should be given only to directories
### that really need such authorization.

# Set permissions  to app files
chown -R root:root $final_path
chmod -R o-rwx $final_path
setfacl -n -R -m user:$app-guacd:rx -m default:user:$app-guacd:rx $final_path
setfacl -n -R -m user:$app-tomcat:rx -m default:user:$app-tomcat:rx $final_path
chown -R $app-guacd:$app-guacd "/var/log/$app/guacd/"
chown -R $app-tomcat:$app-tomcat "/var/log/$app/tomcat/"
chown -R root:$app-tomcat "$final_path/etc/tomcat9/" "$final_path/etc/guacamole/"
chown -R "$app-tomcat":"$app-tomcat" "$final_path/var/lib/tomcat9/webapps"
setfacl -n -R -m user:$app-guacd:- -m default:user:$app-guacd:- "$final_path/var/lib/tomcat9/" "$final_path/etc/guacamole/" "$final_path/etc/tomcat9/"

#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Configuring log rotation..." --weight=1

### `ynh_use_logrotate` is used to configure a logrotate configuration for the logs of this app.
### Use this helper only if there is effectively a log file for this app.
### If you're not using this helper:
###		- Remove the section "BACKUP LOGROTATE" in the backup script
###		- Remove also the section "REMOVE LOGROTATE CONFIGURATION" in the remove script
###		- As well as the section "RESTORE THE LOGROTATE CONFIGURATION" in the restore script
###		- And the section "SETUP LOGROTATE" in the upgrade script

# Use logrotate to manage application logfile(s)
ynh_use_logrotate --logfile="/var/log/$app/tomcat/catalina.out" --specific_user="$app-tomcat/$app-tomcat"

#=================================================
# INTEGRATE SERVICES IN YUNOHOST
#=================================================
ynh_script_progression --message="Integrating services in YunoHost..." --weight=1

### `yunohost service add` integrates a service in YunoHost. It then gets
### displayed in the admin interface and through the others `yunohost service` commands.
### (N.B.: this line only makes sense if the app adds a service to the system!)
### If you're not using these lines:
###		- You can remove these files in conf/.
###		- Remove the section "REMOVE SERVICE INTEGRATION IN YUNOHOST" in the remove script
###		- As well as the section "INTEGRATE SERVICES IN YUNOHOST" in the restore script
###		- And the section "INTEGRATE SERVICES IN YUNOHOST" in the upgrade script

yunohost service add "$app-guacd" --description="Guacamole server" --log="/var/log/$app/guacd.log"
yunohost service add "$app-tomcat" --description="Guacamole client" --log="/var/log/$app/tomcat.log"

#=================================================
# START SYSTEMD SERVICES
#=================================================
ynh_script_progression --message="Starting systemd services..." --weight=1

### `ynh_systemd_action` is used to start a systemd service for an app.
### Only needed if you have configure a systemd service

# Start systemd services
ynh_systemd_action --service_name="$app-guacd" --action="start" --log_path="/var/log/$app/guacd.log"
ynh_systemd_action --service_name="$app-tomcat" --action="start" --log_path="/var/log/$app/tomcat.log"

#=================================================
# SETUP FAIL2BAN
#=================================================
ynh_script_progression --message="Configuring Fail2Ban..." --weight=1

# Create a dedicated Fail2Ban config
ynh_add_fail2ban_config --logpath="/var/log/syslog" --failregex='o.a.g.r.auth.AuthenticationService - Authentication attempt from <HOST> for user "[^"]*" failed\.$'

#=================================================
# SETUP SSOWAT
#=================================================
ynh_script_progression --message="Configuring permissions..." --weight=1

# Make app public if necessary
if [ $is_public -eq 1 ]
then
	# Everyone can access the app.
	# The "main" permission is automatically created before the install script.
	ynh_permission_update --permission="main" --add="visitors"
fi

#=================================================
# RELOAD NGINX
#=================================================
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="Installation of $app completed" --last