#!/bin/bash

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

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

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

# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

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

domain=$YNH_APP_ARG_DOMAIN
is_public=$YNH_APP_ARG_IS_PUBLIC
pvp=$YNH_APP_ARG_PVP
creative=$YNH_APP_ARG_CREATIVE
damage=$YNH_APP_ARG_DAMAGE
servername=$YNH_APP_ARG_SERVERNAME

### 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_print_info --message="Validating installation parameters..."

### 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 "This path already contains a folder"

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

#=================================================
# STORE SETTINGS FROM MANIFEST
#=================================================
ynh_print_info --message="Storing installation settings..."

ynh_app_setting_set --app=$app --key=domain --value=$domain
ynh_app_setting_set --app=$app --key=is_public --value=$is_public
ynh_app_setting_set --app=$app --key=pvp --value=$pvp
ynh_app_setting_set --app=$app --key=creative --value=$creative
ynh_app_setting_set --app=$app --key=damage --value=$damage
ynh_app_setting_set --app=$app --key=servername --value=$servername

#=================================================
# STANDARD MODIFICATIONS
#=================================================
# FIND AND OPEN A PORT
#=================================================
ynh_print_info --message="Configuring firewall..."

### 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.
### If you're not using these lines:
###		- Remove the section "CLOSE A PORT" in the remove script

# Find a free port
port=$(ynh_find_port 30000)
# Open this port
ynh_exec_warn_less yunohost firewall allow --no-upnp UDP $port
ynh_app_setting_set --app=$app --key=port --value=$port

#=================================================
# INSTALL DEPENDENCIES
#=================================================
ynh_print_info --message="Installing dependencies..."

### `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.
### If you're not using this helper:
###		- Remove the section "REMOVE DEPENDENCIES" in the remove script
###		- Remove the variable "pkg_dependencies" in _common.sh
###		- As well as the section "REINSTALL DEPENDENCIES" in the restore script
###		- And the section "UPGRADE DEPENDENCIES" in the upgrade script

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
ynh_print_info --message="Setting up source files..."

### `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 --dest_dir="$final_path"

#=================================================
# CREATE DEDICATED USER
#=================================================
ynh_print_info --message="Configuring system user..."

# Create a system user
ynh_system_user_create --username=$app --home_dir=/home/yunohost.app/$app --use_shell
home_path=/home/yunohost.app/$app

#=================================================
# COPY CONFIG FILE
#=================================================

if [ -e /home/yunohost.app/$app ]
then
echo "Nothing to do..."
else
mkdir -p /home/yunohost.app/$app/.minetest/
mkdir /home/yunohost.app/$app/.minetest/worlds/
fi

cp -a ../conf/minetest.conf /home/yunohost.app/$app/.minetest/

#=================================================
# SETUP SYSTEMD
#=================================================
ynh_print_info --message="Configuring a systemd service..."

### `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 a dedicated systemd config
ynh_add_systemd_config

#=================================================
# SPECIFIC SETUP
#=================================================
# Compile Minetest
cd /opt/yunohost/$app
# Download Minetest Game
git clone --depth 1 https://github.com/minetest/minetest_game.git games/minetest_game -b stable-5

cmake . -DRUN_IN_PLACE=TRUE -DENABLE_LUAJIT=TRUE -DBUILD_CLIENT=FALSE -DBUILD_SERVER=TRUE

make -j$(nproc)


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

### `ynh_replace_string` is used to replace a string in a file.
### (It's compatible with sed regular expressions syntax)

ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$home_path/.minetest/minetest.conf"
ynh_replace_string --match_string="__SERVERNAME__" --replace_string="$servername" --target_file="$home_path/.minetest/minetest.conf"
ynh_replace_string --match_string="__DOMAIN__" --replace_string="$domain" --target_file="$home_path/.minetest/minetest.conf"
ynh_replace_string --match_string="__ANNOUNCE__" --replace_string="$is_public" --target_file="$home_path/.minetest/minetest.conf"
ynh_replace_string --match_string="__PVP__" --replace_string="$pvp" --target_file="$home_path/.minetest/minetest.conf"
ynh_replace_string --match_string="__CREATIVE__" --replace_string="$creative" --target_file="$home_path/.minetest/minetest.conf"
ynh_replace_string --match_string="__DAMAGE__" --replace_string="$damage" --target_file="$home_path/.minetest/minetest.conf"


#=================================================
# CREATE WORLD
#=================================================

# Create logs dir
if [ -e /var/log/$app ]
then
echo "Nothing to do..."
else
mkdir /var/log/$app
fi

# Set permissions on logs
chown -R minetest:minetest /var/log/minetest

systemctl start minetest

#=================================================
# STORE THE CONFIG FILE CHECKSUM
#=================================================

### `ynh_store_file_checksum` is used to store the checksum of a file.
### That way, during the upgrade script, by using `ynh_backup_if_checksum_is_different`,
### you can make a backup of this file before modifying it again if the admin had modified it.

# Calculate and store the config file checksum into the app settings
ynh_store_file_checksum --file="$home_path/.minetest/minetest.conf"

#=================================================
# 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: $final_path
chown -R minetest: $home_path

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

### `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

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

### `yunohost service add` is a CLI yunohost command to add a service in the admin panel.
### You'll find the service in the 'services' section of YunoHost admin panel.
### This CLI command would be useless if the app does not have any services (systemd or sysvinit)
### If you're not using these lines:
###		- You can remove these files in conf/.
###		- Remove the section "REMOVE SERVICE FROM ADMIN PANEL" in the remove script
###		- As well as the section "ADVERTISE SERVICE IN ADMIN PANEL" in the restore script

yunohost service add $app --log "/var/log/$app/$app.log"
# if using yunohost version 3.2 or more in the 'manifest.json', a description can be added
#yunohost service add $app --description "$app daemon for XXX" --log "/var/log/$app/$app.log"

#=================================================
# RELOAD MINETEST
#=================================================
ynh_print_info --message="Reloading minetest..."

ynh_systemd_action --action=restart --line_match="Server for gameid=minetest listening on :::30000." --log_path="/var/log/minetest/minetest.log"
sleep 1

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

ynh_print_info --message="Installation of $app completed"