package insight

import (
	"strings"
	"testing"
)

func TestDeterministicTransactionCopyDistinguishesPaymentStatesWithoutCausalClaims(t *testing.T) {
	copy := deterministicTransactionCopy(
		PeriodScope{JalaliLabelFA: "مرداد ۱۴۰۵"},
		aggregate{Sessions: 10, Paid: 7, Verified: 5, Unverified: 2, Failed: 2, Reversed: 1},
		aggregate{Sessions: 8, Paid: 6},
		true,
		TimeContext{},
		ConfidenceHigh,
	)

	body := copy.LatestObserved.Body
	for _, expected := range []string{"پرداخت‌شده و در انتظار تأیید", "تأیید نهایی", "ناموفق"} {
		if !strings.Contains(body, expected) {
			t.Fatalf("expected transaction copy to contain %q: %s", expected, body)
		}
	}
	if !strings.Contains(copy.Past.Body, "علت آن را مشخص نمی‌کند") {
		t.Fatalf("expected non-causal comparison language: %s", copy.Past.Body)
	}
}

func TestDeterministicTransactionCopyHandlesEmptyPeriod(t *testing.T) {
	copy := deterministicTransactionCopy(
		PeriodScope{JalaliLabelFA: "امروز"},
		aggregate{},
		aggregate{},
		false,
		TimeContext{},
		ConfidenceInsufficientData,
	)

	if strings.Contains(copy.LatestObserved.Body, "<nil>") {
		t.Fatalf("empty-period copy exposed an implementation value: %s", copy.LatestObserved.Body)
	}
	if !strings.Contains(copy.LatestObserved.Body, "ناموجود") {
		t.Fatalf("expected unavailable rates in empty-period copy: %s", copy.LatestObserved.Body)
	}
}