package main // import "github.com/drakkan/sftpgo"

import (
	"flag"
	"fmt"
	"net/http"
	"os"
	"path/filepath"
	"time"

	_ "github.com/go-sql-driver/mysql"
	_ "github.com/lib/pq"
	_ "github.com/mattn/go-sqlite3"

	"github.com/drakkan/sftpgo/api"
	"github.com/drakkan/sftpgo/config"
	"github.com/drakkan/sftpgo/dataprovider"
	"github.com/drakkan/sftpgo/logger"
	"github.com/drakkan/sftpgo/sftpd"

	"github.com/rs/zerolog"
)

func main() {
	confName := "sftpgo.conf"
	logSender := "main"
	var (
		configDir   string
		logFilePath string
	)
	flag.StringVar(&configDir, "config-dir", ".", "Location for SFTPGo config dir. It must contain sftpgo.conf, "+
		"the private key for the SFTP server (id_rsa file) and the SQLite database if you use SQLite as data provider. "+
		"The server private key will be autogenerated if the user that executes SFTPGo has write access to the config-dir")
	flag.StringVar(&logFilePath, "log-file-path", "sftpgo.log", "Location for the log file")
	flag.Parse()

	configFilePath := filepath.Join(configDir, confName)
	logger.InitLogger(logFilePath, zerolog.DebugLevel)
	logger.Info(logSender, "starting SFTPGo, config dir: %v", configDir)
	config.LoadConfig(configFilePath)
	providerConf := config.GetProviderConf()

	err := dataprovider.Initialize(providerConf, configDir)
	if err != nil {
		logger.Warn(logSender, "error initializing data provider: %v", err)
		os.Exit(1)
	}

	dataProvider := dataprovider.GetProvider()
	sftpdConf := config.GetSFTPDConfig()
	httpdConf := config.GetHTTPDConfig()

	sftpd.SetDataProvider(dataProvider)

	shutdown := make(chan bool)

	go func() {
		logger.Debug(logSender, "initializing SFTP server with config %+v", sftpdConf)
		if err := sftpdConf.Initialize(configDir); err != nil {
			logger.Error(logSender, "could not start SFTP server: %v", err)
		}
		shutdown <- true
	}()

	if httpdConf.BindPort > 0 {
		router := api.GetHTTPRouter()
		api.SetDataProvider(dataProvider)

		go func() {
			logger.Debug(logSender, "initializing HTTP server with config %+v", httpdConf)
			s := &http.Server{
				Addr:           fmt.Sprintf("%s:%d", httpdConf.BindAddress, httpdConf.BindPort),
				Handler:        router,
				ReadTimeout:    300 * time.Second,
				WriteTimeout:   300 * time.Second,
				MaxHeaderBytes: 1 << 20, // 1MB
			}
			if err := s.ListenAndServe(); err != nil {
				logger.Error(logSender, "could not start HTTP server: %v", err)
			}
			shutdown <- true
		}()
	} else {
		logger.Debug(logSender, "HTTP server not started, disabled in config file")
	}

	<-shutdown
}