package main

import (
	"bufio"
	"flag"
	"fmt"
	"io/ioutil"
	"os"

	picol "github.com/dragonheim/gagent/pkg/picol"
)

var fname = flag.String("f", "", "file name")

func RunPicol(fname string) error {
	interp := picol.NewInterpreter()
	interp.RegisterCoreCommands()

	buf, err := ioutil.ReadFile(fname)
	if err == nil {
		result, err := interp.Eval(string(buf))
		if err != nil {
			return fmt.Errorf("Error: %s, Result: %s", err, result)
		}
	} else {
		for {
			fmt.Print("picol> ")
			scanner := bufio.NewReader(os.Stdin)
			clibuf, _ := scanner.ReadString('\n')
			result, err := interp.Eval(clibuf[:len(clibuf)-1])
			if len(result) != 0 {
				return fmt.Errorf("Error: %s, Result: %s", err, result)
			}
		}
	}
	return nil
}

func main() {
	flag.Parse()
	err := RunPicol(*fname)
	if err != nil {
		fmt.Println(err)
	}
}