#!/bin/bash

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

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

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

upgrade_type=$(ynh_check_app_version_changed)

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

if ynh_compare_current_package_version --comparison le --version 2023.02.22~ynh1
then
	ynh_script_progression --message="Mirroring old Filesystem to secure MinIO start"
	tmp="/tmp/minio"
	mkdir "$tmp"
	chown -R $app:www-data "$tmp"
	pushd "$data_dir/"
		for d in * ; do
		if [ "$d" == "*" ]
		then
			ynh_script_progression --message="No buckets to migrate"
		else
			ynh_script_progression --message="Moving $d..."
			ynh_exec_warn_less sudo -u $app $install_dir/mc mirror --preserve "minio/$d" "$tmp/$d"
		fi
		done
		if ynh_compare_current_package_version --comparison eq --version 2022.09.01~ynh1
		then
			ynh_die --message="Sorry, your MinIO instance requires a complex manual migration. Please contact Limezy on the YunoHost forum"
		fi
		if ynh_compare_current_package_version --comparison eq --version 2022.11.11~ynh1
		then
			ynh_die --message="Sorry, your MinIO instance requires a complex manual migration. Please contact Limezy on the YunoHost forum"
		fi
		if ynh_compare_current_package_version --comparison eq --version 2023.01.11~ynh1
		then
			ynh_die --message="Sorry, your MinIO instance requires a complex manual migration. Please contact Limezy on the YunoHost forum"
		fi
	popd
    ynh_secure_remove --file="$data_dir"
	ynh_exec_warn_less mkdir "$data_dir"
	chmod 750 "$data_dir"
	chmod -R o-rwx "$data_dir"
	chown -R $app:www-data "$data_dir"
else
	ynh_script_progression --message="No migration to be done"
fi

# Retrieve the password from the .env file
if [ -z "${password:-}" ]; then
	password=$(ynh_read_var_in_file --file="$install_dir/.env" --key="MINIO_ROOT_PASSWORD")
fi

#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=2

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

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

if [ "$upgrade_type" == "UPGRADE_APP" ]
then
	ynh_script_progression --message="Upgrading source files..." --weight=5

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

chmod 750 "$install_dir"
chmod -R o-rwx "$install_dir"
chown -R $app:www-data "$install_dir"
chmod +x "$install_dir/minio"
chmod +x "$install_dir/mc"

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

# Create a dedicated NGINX config
ynh_add_nginx_config

# Create a dedicated systemd config
ynh_add_systemd_config

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

yunohost service add $app --description="A High Performance, Kubernetes Native Object Storage" --log="/var/log/$app/$app.log"

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

ynh_add_config --template=".env" --destination="$install_dir/.env"

chmod 400 "$install_dir/.env"
chown $app:$app "$install_dir/.env"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=3

ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Console:"

#=================================================
# SETUP MINIO CLIENT
#=================================================
ynh_script_progression --message="Configuring MinIO client..." --weight=1

pushd $install_dir
	ynh_exec_warn_less sudo -u $app ./mc --no-color alias set minio "https://$domain" "$admin" "$password" --api S3v4
popd

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

if ynh_compare_current_package_version --comparison le --version 2023.02.22~ynh1
then
	ynh_script_progression --message="Migration from Filesystem to Single-Node Single-Drive mode"
	pushd "$tmp/"
		for d in * ; do
		if [ "$d" == "*" ]
		then
			ynh_script_progression --message="No buckets to migrate"
		else
			ynh_script_progression --message="Migrating bucket $d"
				pushd $install_dir
					ynh_exec_warn_less sudo -u $app ./mc mb minio/"$d"
					ynh_exec_warn_less sudo -u $app ./mc mirror --preserve "$tmp/$d" "minio/$d"
					# This is a hack, but it will make outline_ynh users' lifes much easier !
					if [ "$d" == "outlinestorage" ]
					then
						ynh_exec_warn_less sudo -u $app ./mc anonymous set public minio/outlinestorage
					else
						ynh_script_progression --message="Bucket is migrated and objects are now mirrored. However, make sure to set properly access policy of bucket $d. That part of the migration can't be automated, sorry ! You can log into the minio console to perform your changes."
					fi
				popd
				ynh_secure_remove --file="DATA_$d"
		fi
		done
	popd
	ynh_secure_remove --file="$tmp"
else
	ynh_script_progression --message="No migration required"
fi

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

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