package main

import (
	"context"
	"fmt"
	"os"
	"os/signal"
	"strings"
	"syscall"
)

func main() {
	err := run()
	if err != nil {
		fmt.Fprintln(os.Stderr, "onechat:", err)
		os.Exit(1)
	}
}

func run() error {
	ctx, cancel := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
	defer cancel()

	args := os.Args[1:]
	switch {
	case len(args) == 0:
		_, err := fmt.Println("onechat")
		if err != nil {
			return err
		}
	case len(args) == 1 && args[0] == "login":
		err := login(ctx, os.Stdout)
		if err != nil {
			return err
		}
	default:
		return fmt.Errorf("unknown command %q", strings.Join(args, " "))
	}

	return ctx.Err()
}