// mmc -- Mattermost client
// Copyright (C) 2023 Sergey Matveev <stargrave@stargrave.org>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License.
//
// 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package main

import (
	"flag"
	"log"
	"os"
	"time"

	"github.com/mattermost/mattermost-server/v6/model"
	"go.cypherpunks.ru/recfile"
	"go.stargrave.org/mmc"
)

const PerPage = 100

func main() {
	entrypoint := flag.String("entrypoint", "mm.rnd.stcnet.ru", "Entrypoint")
	flag.Parse()
	log.SetFlags(log.Lshortfile)
	log.SetOutput(os.Stdout)

	chId := flag.Arg(0)
	postId := flag.Arg(1)
	login, password := mmc.FindInNetrc(*entrypoint)
	if login == "" || password == "" {
		log.Fatalln("no credentials found for:", *entrypoint)
	}
	c := model.NewAPIv4Client("https://" + *entrypoint)
	c.Login(login, password)

	users := make(map[string]*model.User)
	for pageNum := 0; ; pageNum++ {
		time.Sleep(mmc.SleepTime)
		page, _, err := c.GetUsers(pageNum, PerPage, "")
		if err != nil {
			log.Fatalln(err)
		}
		for _, u := range page {
			users[u.Id] = u
		}
		if len(page) < PerPage {
			break
		}
	}

	list, _, err := c.GetPostsBefore(chId, postId, 0, 200, "", false)
	if err != nil {
		log.Fatalln(err)
	}
	w := recfile.NewWriter(os.Stdout)
	for _, post := range list.ToSlice() {
		if err = mmc.PostToRec(
			w, users,
			mmc.Post{P: post, E: model.WebsocketEventPosted},
		); err != nil {
			log.Fatalln(err)
		}
	}

	c.Logout()
}