package main

import (
	"flag"
	"fmt"
	"os"
	"strings"
)

var fileName string

func init() {
	flag.StringVar(&fileName, "f", "", "ast file to generate from")
}

func main() {
	flag.Parse()

	bs, err := os.ReadFile(fileName)

	tokens, errs := lex(string(bs))
	if len(errs) > 0 {
		for _, err := range errs {
			fmt.Printf("%s\n", err.Error())
		}
		os.Exit(1)
	}

	ast, err := parse(tokens)
	if err != nil {
		fmt.Printf("%s\n", err.Error())
		os.Exit(1)
	}

	name, output, err := transpile(ast)
	if err != nil {
		fmt.Printf("%s\n", err.Error())
		os.Exit(1)
	}

	f, err := os.Create(strings.ToLower(name) + ".go")
	if err != nil {
		fmt.Printf("%s\n", err.Error())
		os.Exit(1)
	}

	_, err = f.Write(output)
	if err != nil {
		fmt.Printf("%s\n", err.Error())
		os.Exit(1)
	}
}