package loxgo

import (
	"errors"
	"os"

	"git.red-panda.pet/pandaware/lox-go/lexer"
	"git.red-panda.pet/pandaware/lox-go/parser"
	"git.red-panda.pet/pandaware/lox-go/reporter"
	"git.red-panda.pet/pandaware/lox-go/runtime"
)

func RunFile(filename string) error {
	bs, err := os.ReadFile(filename)
	if err != nil {
		return err
	}

	if err := Run(string(bs)); err != nil {
		return err
	}

	return nil
}

func Run(source string) error {
	s := lexer.New(source)
	tokens, ok := s.ScanTokens()
	if !ok {
		return errors.New("lexer error")
	}

	p := parser.New(tokens)
	expr, err := p.Parse()
	if err != nil {
		return errors.New("parser error")
	}

	interpreter := runtime.NewInterpreter()
	reporter.Debug(0, "interpreter", "stdin", interpreter.Evaluate(expr).Debug())

	return nil
}