package cli

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"runtime"
	"syscall"

	"github.com/spf13/cobra"
	"sneak.berlin/go/simplexcalc/internal/bot"
	"sneak.berlin/go/simplexcalc/internal/config"
	"sneak.berlin/go/simplexcalc/internal/logger"
)

func runCmd(version string) *cobra.Command {
	return &cobra.Command{
		Use:   "run",
		Short: "run the bot",
		Args:  cobra.NoArgs,
		RunE: func(cmd *cobra.Command, _ []string) error {
			return run(cmd.Context(), version)
		},
	}
}

// run reads the configuration and runs the bot until SIGINT or SIGTERM,
// or until it fails. A failure is the process's exit status, so a
// supervisor restarts it.
func run(ctx context.Context, version string) error {
	cfg, err := config.New()
	if err != nil {
		return fmt.Errorf("reading configuration: %w", err)
	}

	log := logger.New(os.Stdout, cfg.Debug)
	log.Info("starting",
		"appname", appname,
		"version", version,
		"arch", runtime.GOARCH,
		"data_dir", cfg.DataDir,
	)

	ctx, stop := signal.NotifyContext(ctx, syscall.SIGINT, syscall.SIGTERM)
	defer stop()

	err = bot.Run(ctx, log, cfg)
	if err != nil {
		log.Error("stopped", "error", err)

		return err
	}

	log.Info("stopped")

	return nil
}