package treerack

import (
	"bytes"
	"io"
	"os"
	"testing"
)

func parseWithSyntax(s *Syntax, f io.Reader) (Node, error) {
	return s.Parse(f)
}

func syntaxFromTree(n Node) (*Syntax, error) {
	s := &Syntax{}
	if err := define(s, n); err != nil {
		return nil, err
	}

	if err := s.Init(); err != nil {
		return nil, err
	}

	return s, nil
}

func testParseFromTree(t *testing.T, n Node, f io.Reader) Node {
	s, err := syntaxFromTree(n)
	if err != nil {
		t.Error(err)
		return Node{}
	}

	nn, err := parseWithSyntax(s, f)
	if err != nil {
		t.Error(err)
		return Node{}
	}

	checkNode(t, false, nn, n)
	return nn
}

func TestBoot(t *testing.T) {
	b, err := bootSyntax()
	if err != nil {
		t.Error(err)
		return
	}

	p, err := os.ReadFile("syntax.treerack")
	if err != nil {
		t.Fatal(err)
	}

	n0, err := parseWithSyntax(b, bytes.NewBuffer(p))
	if err != nil {
		t.Error(err)
		return
	}

	n1 := testParseFromTree(t, n0, bytes.NewBuffer(p))
	if t.Failed() {
		return
	}

	testParseFromTree(t, n1, bytes.NewBuffer(p))
}