/*
Copyright © 2026 Thomas von Dein

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 cfg

import (
	"crypto/tls"
	"errors"
	"net/http"
	"os"

	"github.com/elastic/elastic-transport-go/v8/elastictransport"
	"github.com/elastic/go-elasticsearch/v9"
)

const (
	Version string = `v0.0.1`
)

type Config struct {
	Uri, User, Pass string
	ES              *elasticsearch.TypedClient
	Debug           bool
	From, To        int
	Index           string
	Filter          []string
}

func Init() (*Config, error) {
	cfg := Config{
		Uri:  os.Getenv("ES_URI"),
		User: os.Getenv("ES_USER"),
		Pass: os.Getenv("ES_PASS"),
	}

	switch {
	case cfg.Uri == "":
		return nil, errors.New("ES_URI unset")
	case cfg.User == "":
		return nil, errors.New("ES_USER unset")
	case cfg.Pass == "":
		return nil, errors.New("ES_PASS unset")
	}

	es, _ := elasticsearch.NewTyped(
		elasticsearch.WithAddresses(cfg.Uri),
		elasticsearch.WithBasicAuth(cfg.User, cfg.Pass),
		elasticsearch.WithTransportOptions(
			elastictransport.WithTransport(
				&http.Transport{
					TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
				},
			),
		),
	)

	cfg.ES = es

	return &cfg, nil
}