#!/bin/sh
# RPCD backend for Mail-in-a-Box LuCI app

CONFIG="mailinabox"
CONTAINER="secbx-mailserver"

uci_get() { uci -q get ${CONFIG}.main.$1; }
uci_set() { uci set ${CONFIG}.main.$1="$2" && uci commit ${CONFIG}; }

get_status() {
	local enabled=$(uci_get enabled)
	local hostname=$(uci_get hostname)
	local domain=$(uci_get domain)
	local data_path=$(uci_get data_path)

	local docker_available=0
	command -v docker >/dev/null 2>&1 && docker_available=1

	local running=0
	local container_status="stopped"
	if [ "$docker_available" = "1" ]; then
		if docker ps --filter "name=$CONTAINER" --format "{{.Names}}" 2>/dev/null | grep -q "$CONTAINER"; then
			running=1
			container_status="running"
		fi
	fi

	local installed=0
	if [ "$docker_available" = "1" ]; then
		docker images --format "{{.Repository}}" 2>/dev/null | grep -q "docker-mailserver" && installed=1
	fi

	cat <<EOF
{
	"enabled": $([ "$enabled" = "1" ] && echo "true" || echo "false"),
	"running": $([ "$running" = "1" ] && echo "true" || echo "false"),
	"installed": $([ "$installed" = "1" ] && echo "true" || echo "false"),
	"docker_available": $([ "$docker_available" = "1" ] && echo "true" || echo "false"),
	"container_status": "$container_status",
	"hostname": "${hostname:-mail.example.com}",
	"domain": "${domain:-example.com}",
	"data_path": "${data_path:-/srv/mailserver}",
	"smtp_port": $(uci_get smtp_port || echo 25),
	"imap_port": $(uci_get imap_port || echo 143),
	"imaps_port": $(uci_get imaps_port || echo 993)
}
EOF
}

get_config() {
	cat <<EOF
{
	"enabled": "$(uci_get enabled || echo 0)",
	"hostname": "$(uci_get hostname || echo mail.example.com)",
	"domain": "$(uci_get domain || echo example.com)",
	"data_path": "$(uci_get data_path || echo /srv/mailserver)",
	"timezone": "$(uci_get timezone || echo UTC)",
	"smtp_port": "$(uci_get smtp_port || echo 25)",
	"submission_port": "$(uci_get submission_port || echo 587)",
	"imap_port": "$(uci_get imap_port || echo 143)",
	"imaps_port": "$(uci_get imaps_port || echo 993)",
	"enable_spamassassin": "$(uci_get enable_spamassassin || echo 1)",
	"enable_clamav": "$(uci_get enable_clamav || echo 0)",
	"ssl_type": "$(uci_get ssl_type || echo letsencrypt)"
}
EOF
}

save_config() {
	local input; read -r input
	local hostname=$(echo "$input" | jsonfilter -e '@.hostname' 2>/dev/null)
	local domain=$(echo "$input" | jsonfilter -e '@.domain' 2>/dev/null)
	[ -n "$hostname" ] && uci_set hostname "$hostname"
	[ -n "$domain" ] && uci_set domain "$domain"
	echo '{"success": true}'
}

do_install() {
	if command -v mailinaboxctl >/dev/null 2>&1; then
		mailinaboxctl install >/tmp/mailinabox-install.log 2>&1 &
		echo '{"success": true, "message": "Installation started"}'
	else
		echo '{"success": false, "error": "mailinaboxctl not found"}'
	fi
}

do_start() {
	[ -x /etc/init.d/mailinabox ] && /etc/init.d/mailinabox start >/dev/null 2>&1 && uci_set enabled '1'
	echo '{"success": true}'
}

do_stop() {
	[ -x /etc/init.d/mailinabox ] && /etc/init.d/mailinabox stop >/dev/null 2>&1
	echo '{"success": true}'
}

do_restart() {
	[ -x /etc/init.d/mailinabox ] && /etc/init.d/mailinabox restart >/dev/null 2>&1
	echo '{"success": true}'
}

get_logs() {
	local log_content=""
	[ -f /tmp/mailinabox-install.log ] && log_content=$(tail -n 50 /tmp/mailinabox-install.log 2>/dev/null | sed 's/"/\\"/g' | tr '\n' '|')
	echo "{\"logs\": \"$log_content\"}"
}

list_methods() {
	cat <<'EOF'
{
	"status": {},
	"get_config": {},
	"save_config": {"hostname": "string", "domain": "string"},
	"install": {},
	"start": {},
	"stop": {},
	"restart": {},
	"logs": {}
}
EOF
}

case "$1" in
	list) list_methods ;;
	call)
		case "$2" in
			status)      get_status ;;
			get_config)  get_config ;;
			save_config) save_config ;;
			install)     do_install ;;
			start)       do_start ;;
			stop)        do_stop ;;
			restart)     do_restart ;;
			logs)        get_logs ;;
			*)           echo '{"error": "Unknown method"}' ;;
		esac
		;;
	*) echo '{"error": "Unknown command"}' ;;
esac