package luar

import (
	"testing"

	"github.com/yuin/gopher-lua"
)

func Test_slice(t *testing.T) {
	L := lua.NewState()
	defer L.Close()

	things := []string{
		"cake",
		"wallet",
		"calendar",
		"phone",
		"speaker",
	}

	L.SetGlobal("things", New(L, things))

	testReturn(t, L, `return #things, things[1], things[5]`, "5", "cake", "speaker")
	if err := L.DoString(`things[1] = "cookie"`); err != nil {
		t.Fatal(err)
	}
	if things[0] != "cookie" {
		t.Fatalf(`expected things[0] = "cookie", got %s`, things[0])
	}
}

func Test_slice_2(t *testing.T) {
	L := lua.NewState()
	defer L.Close()

	items := make([]string, 0, 10)

	L.SetGlobal("items", New(L, items))

	testReturn(t, L, `return #items`, "0")
	testReturn(t, L, `items = items + "hello" + "world"; return #items`, "2")
	testReturn(t, L, `return items[1]`, "hello")
	testReturn(t, L, `return items[2]`, "world")
}

func Test_slice_iterator(t *testing.T) {
	L := lua.NewState()
	defer L.Close()

	s := []string{
		"hello",
		"there",
	}

	e := []string{}

	L.SetGlobal("s", New(L, s))
	L.SetGlobal("e", New(L, e))

	testReturn(t, L, `local itr = s(); local a, b = itr(); local c, d = itr(); return a, b, c, d`, "1", "hello", "2", "there")
	testReturn(t, L, `local itr = e(); local a, b = itr(); return a, b`, "nil", "nil")
}