#!/bin/bash

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

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

#=================================================
# LOAD SETTINGS
#=================================================
ynh_script_progression --message="Loading installation settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
port=$(ynh_app_setting_get --app=$app --key=port)
game=$(ynh_app_setting_get --app=$app --key=game)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
datadir=$(ynh_app_setting_get --app=$app --key=datadir)
pvp=$(ynh_app_setting_get --app=$app --key=pvp)
creative=$(ynh_app_setting_get --app=$app --key=creative)
damage=$(ynh_app_setting_get --app=$app --key=damage)
servername=$(ynh_app_setting_get --app=$app --key=servername)

#=================================================
# CHECK VERSION
#=================================================
ynh_script_progression --message="Checking version..."

upgrade_type=$(ynh_check_app_version_changed)

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

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	ynh_clean_check_starting
	# 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..."

ynh_systemd_action --service_name=$app --action="stop"

#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
ynh_script_progression --message="Checking version..."

version=ynh_app_upstream_version

if [ "$version" = "0.01" ]; then
ynh_die --message="You can't upgrade to this version with simple upgrade. Please read the readme for upgrading https://github.com/YunoHost-Apps/minetest_ynh#additional-information ..."
fi

ynh_script_progression --message="Ensuring downward compatibility..."

# 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 domain doesn't exist, create it
if [ -z "$domain" ]; then
	domain=$(ynh_app_setting_get --app=$app --key=server_domain)
	ynh_app_setting_set --app=$app --key=domain --value=$domain
fi

# If datadir doesn't exist, create it
if [ -z $datadir ]; then
	datadir=$(ynh_app_setting_get --app=$app --key=home_path)
	ynh_app_setting_set --app=$app --key=datadir --value=$datadir
	ynh_app_setting_delete --app=$app --key=home_path
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

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

# Create a dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir="$final_path"

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=1

	# Remove old install
	ynh_secure_remove --file="$final_path"

	# Download, check integrity, uncompress and patch the source from app.src
	ynh_setup_source --dest_dir="$final_path"
fi

chmod 750 "$final_path"
chmod -R o-rwx "$final_path"
chown -R $app:$app "$final_path"

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

ynh_install_app_dependencies $pkg_dependencies

#=================================================
# SPECIFIC UPGRADE
#=================================================
# BUILDING
#=================================================
ynh_script_progression --message="Building Minetest..."

# Install the game
if [ $game = "capturetheflag" ]; then
	# Download Capture The Flag

	pushd $final_path
		# To avoid mess remove this first
		ynh_secure_remove games/capturetheflag/
		# Then clone the latest version from git
		git clone --recursive https://github.com/MT-CTF/capturetheflag.git games/capturetheflag
	popd
else
	# Download Minetest Game
	ynh_setup_source --dest_dir=$final_path/games/minetest_game --source_id=minetest_game
fi

pushd $final_path
	ynh_exec_warn_less cmake . -DRUN_IN_PLACE=TRUE -DENABLE_LUAJIT=TRUE -DBUILD_CLIENT=FALSE -DBUILD_SERVER=TRUE

	ynh_exec_warn_less make -j$(nproc)
popd

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

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

#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..."

if ynh_permission_has_user --permission=main --user=visitors
then
	announce="true"
else
	announce="false"
fi

ynh_add_config --template="../conf/minetest.conf" --destination="$datadir/.minetest/minetest.conf"

chmod 400 "$datadir/.minetest/minetest.conf"
chown $app:$app "$datadir/.minetest/minetest.conf"

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

# Create a dedicated systemd config
ynh_add_systemd_config

#=================================================
# GENERIC FINALIZATION
#=================================================
# SETUP LOGROTATE
#=================================================
ynh_script_progression --message="Upgrading logrotate configuration..."

# 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..."

yunohost service add $app --description="Voxel game engine and game" --log="/var/log/$app/$app.log" --needs_exposed_ports="$port"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..."

ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log" --line_match="listening on"

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

ynh_script_progression --message="Upgrade of $app completed"