package classes_test

import (
	"errors"
	"strings"
	"testing"

	"git.golem15.com/golem15/sm-quizzes-plugin/classes"
	"git.golem15.com/golem15/sm-quizzes-plugin/models"
)

func TestCheckOpenText(t *testing.T) {
	q := models.Question{Type: models.TypeOpen}
	long := 3000
	wide := models.Question{Type: models.TypeOpen, MaxLength: &long}

	fieldKey := func(err error) string {
		var fe *classes.FieldError
		if errors.As(err, &fe) && fe.Field == "text" {
			return fe.Key
		}
		return ""
	}

	if _, err := classes.CheckOpenText("  \n\t ", q); fieldKey(err) != "text_required" {
		t.Errorf("blank text: err = %v, want text_required", err)
	}
	if _, err := classes.CheckOpenText("\x00 \x00", q); fieldKey(err) != "text_required" {
		t.Errorf("NUL-only text: err = %v, want text_required", err)
	}
	over := strings.Repeat("a", 2001)
	if _, err := classes.CheckOpenText(over, q); fieldKey(err) != "text_too_long" {
		t.Errorf("2001 runes with default max: err = %v, want text_too_long", err)
	}
	if got, err := classes.CheckOpenText(over, wide); err != nil || got != over {
		t.Errorf("2001 runes with max 3000: %q, %v", got[:10], err)
	}
	if got, err := classes.CheckOpenText("a\x00b", q); err != nil || got != "ab" {
		t.Errorf("NUL stripped: %q, %v; want ab", got, err)
	}
	if got, err := classes.CheckOpenText("  moja odpowiedź \n", q); err != nil || got != "moja odpowiedź" {
		t.Errorf("trimmed: %q, %v", got, err)
	}
	polish := strings.Repeat("ż", 2000)
	if got, err := classes.CheckOpenText(polish, q); err != nil || got != polish {
		t.Errorf("2000 runes of ż (4000 bytes) refused: %v", err)
	}
	five := 5
	if _, err := classes.CheckOpenText("abcdef", models.Question{MaxLength: &five}); fieldKey(err) != "text_too_long" {
		t.Errorf("6 runes with max 5: err = %v, want text_too_long", err)
	}
	if classes.MaxLength(q) != models.DefaultMaxLength || classes.MaxLength(wide) != 3000 {
		t.Errorf("MaxLength = %d / %d", classes.MaxLength(q), classes.MaxLength(wide))
	}
	zero := 0
	if classes.MaxLength(models.Question{MaxLength: &zero}) != models.DefaultMaxLength {
		t.Error("MaxLength of a non-positive value should fall back to the default")
	}
}