package importer

import (
	"context"
	"os"
	"os/signal"
	"syscall"
	"time"

	"github.com/rs/zerolog"
	"go.uber.org/fx"
	"sneak.berlin/go/directory/internal/config"
	"sneak.berlin/go/directory/internal/globals"
	"sneak.berlin/go/directory/internal/logger"
	"sneak.berlin/go/directory/internal/store"
)

type ImporterParams struct {
	fx.In
	Logger  *logger.Logger
	Globals *globals.Globals
	Config  *config.Config
	Store   *store.Store
}

type Importer struct {
	startupTime time.Time
	exitCode    int
	log         *zerolog.Logger
	params      ImporterParams
	ctx         context.Context
	cancelFunc  context.CancelFunc
}

func New(lc fx.Lifecycle, params ImporterParams) (*Importer, error) {
	i := new(Importer)
	i.params = params
	i.log = params.Logger.Get()

	lc.Append(fx.Hook{
		OnStart: func(ctx context.Context) error {
			i.startupTime = time.Now()
			go i.Run(ctx)
			return nil
		},
		OnStop: func(ctx context.Context) error {
			i.cleanShutdown(ctx)
			return nil
		},
	})
	return i, nil
}

func (i *Importer) Run(ctx context.Context) {
	i.ctx, i.cancelFunc = context.WithCancel(ctx)

	rootCmd := setupCommands(i)

	go func() {
		c := make(chan os.Signal, 1)
		signal.Ignore(syscall.SIGPIPE)
		signal.Notify(c, os.Interrupt, syscall.SIGTERM)
		sig := <-c
		i.log.Info().Msgf("signal received: %+v", sig)
		if i.cancelFunc != nil {
			i.cancelFunc()
		}
	}()

	if err := rootCmd.ExecuteContext(i.ctx); err != nil {
		i.log.Error().Err(err).Msg("command execution failed")
		i.exitCode = 1
	}

	<-i.ctx.Done()
	i.exitCode = 0
	i.cleanShutdown(ctx)
}

func (i *Importer) cleanShutdown(ctx context.Context) {
	i.log.Info().Msgf("shutting down")
	os.Exit(i.exitCode)
}