// "sync" sub-command: collect information from remote host

// Copyright (C) 2021  Simon Ruderich
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"fmt"
	"regexp"
	"strings"

	"ruderich.org/simon/safcm"
	"ruderich.org/simon/safcm/cmd/safcm/config"
	"ruderich.org/simon/safcm/rpc"
)

func (s *Sync) hostInfo(conn *rpc.Conn) ([]string, error) {
	x, err := s.sendRecv(conn, safcm.MsgInfoReq{
		LogLevel:     s.config.LogLevel,
		DetectGroups: s.config.DetectGroups,
	})
	if err != nil {
		return nil, err
	}
	resp, ok := x.(safcm.MsgInfoResp)
	if !ok {
		return nil, fmt.Errorf("unexpected response %v", x)
	}
	if resp.Error != "" {
		return nil, fmt.Errorf("%s", resp.Error)
	}
	return hostInfoRespToGroups(resp), nil
}

// Keep in sync with cmd/safcm/config/groups.go:groupNameRegexp
var infoGroupDetectedRegexp = regexp.MustCompile(`[^a-z0-9_-]+`)

func hostInfoRespToGroups(resp safcm.MsgInfoResp) []string {
	groups := []string{
		config.GroupDetectedPrefix + "_" + resp.Goos,
		config.GroupDetectedPrefix + "_" + resp.Goarch,
	}
	for _, x := range resp.Output {
		x = strings.TrimSpace(x)
		x = strings.ToLower(x)
		x = infoGroupDetectedRegexp.ReplaceAllString(x, "_")
		groups = append(groups, config.GroupDetectedPrefix+"_"+x)
	}
	return groups
}