// MsgSyncReq: sync data on the 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 sync

import (
	"fmt"
	"os/user"

	"ruderich.org/simon/safcm"
	"ruderich.org/simon/safcm/cmd/safcm-remote/log"
	"ruderich.org/simon/safcm/cmd/safcm-remote/run"
)

type Sync struct {
	req  safcm.MsgSyncReq
	resp safcm.MsgSyncResp

	defaultUser  string
	defaultGroup string

	triggers       []string
	triggersActive map[string]bool

	cmd *run.Cmd
	log *log.Logger
}

const logPrefix = "sync remote:"

func Handle(req safcm.MsgSyncReq,
	runner run.Runner, fun log.LogFunc) safcm.MsgSyncResp {

	s := &Sync{
		req: req,
		log: log.NewLogger(logPrefix, fun),
	}
	s.cmd = run.NewCmd(runner, s.log)

	err := s.setDefaults()
	if err != nil {
		s.resp.Error = fmt.Sprintf("%s %s", logPrefix, err)
		return s.resp
	}

	err = s.syncFiles()
	if err != nil {
		s.resp.Error = fmt.Sprintf("%s files: %s", logPrefix, err)
		return s.resp
	}
	err = s.syncPackages()
	if err != nil {
		s.resp.Error = fmt.Sprintf("%s packages: %s", logPrefix, err)
		return s.resp
	}
	err = s.syncServices()
	if err != nil {
		s.resp.Error = fmt.Sprintf("%s services: %s", logPrefix, err)
		return s.resp
	}
	err = s.syncCommands()
	if err != nil {
		s.resp.Error = fmt.Sprintf("%s commands: %s", logPrefix, err)
		return s.resp
	}
	return s.resp
}

func (s *Sync) setDefaults() error {
	u, err := user.Current()
	if err != nil {
		return err
	}
	s.defaultUser = u.Username
	g, err := user.LookupGroupId(u.Gid)
	if err != nil {
		return err
	}
	s.defaultGroup = g.Name

	s.triggersActive = make(map[string]bool)

	return nil
}