package growthreport

import (
	"testing"
	"time"
)

func TestRequestHashIsStableAndScopeSensitive(t *testing.T) {
	t.Parallel()
	a := RequestHash(7, "T-1", false)
	if a != RequestHash(7, "T-1", false) {
		t.Fatal("RequestHash() is not stable")
	}
	if a == RequestHash(7, "T-2", false) || a == RequestHash(7, "T-1", true) {
		t.Fatal("RequestHash() ignored request scope")
	}
}

func TestNextTehranRefreshUsesCalendarBoundary(t *testing.T) {
	t.Parallel()
	now := time.Date(2026, 8, 21, 20, 0, 0, 0, time.UTC)
	next := NextTehranRefresh(now)
	location, _ := time.LoadLocation("Asia/Tehran")
	local := next.In(location)
	if local.Hour() != 0 || local.Minute() != 0 || !next.After(now) {
		t.Fatalf("NextTehranRefresh() = %s", next)
	}
}

func TestTehranTodayUsesClockInsteadOfDatasetWatermark(t *testing.T) {
	t.Parallel()

	now := time.Date(2026, time.August, 21, 8, 30, 0, 0, time.UTC)
	got := tehranToday(now)
	if got.Format(time.DateOnly) != "2026-08-21" {
		t.Fatalf("tehranToday() = %s", got.Format(time.DateOnly))
	}
}

func TestEstimatedTokenReservationCoversEveryRetryAndTurn(t *testing.T) {
	t.Parallel()
	small := EstimatedTokenReservation([]byte("{}"))
	large := EstimatedTokenReservation(make([]byte, 1000))
	if small < 4*1600 || large <= small || large != 44000 {
		t.Fatalf("reservations small=%d large=%d", small, large)
	}
}

func TestDeterministicOnlyCompletionIsReady(t *testing.T) {
	t.Parallel()

	status, failure := deterministicCompletion()
	if status != StatusReady || failure != "" {
		t.Fatalf("deterministicCompletion() = (%q, %q), want (%q, empty)", status, failure, StatusReady)
	}
}

func TestServiceFingerprintChangesWithDatasetAndConfiguration(t *testing.T) {
	t.Parallel()
	start := time.Date(2026, 8, 21, 0, 0, 0, 0, time.UTC)
	service := &Service{config: ServiceConfig{Model: "model-a", PromptVersion: "prompt-a", SchemaVersion: "schema-a"}}
	current := service.fingerprint(7, "T-1", "watermark-a", "catalog-a", start)
	if current == service.fingerprint(7, "T-1", "watermark-b", "catalog-a", start) {
		t.Fatal("dataset watermark did not invalidate fingerprint")
	}
	if current == service.fingerprint(7, "T-1", "watermark-a", "catalog-b", start) {
		t.Fatal("catalog version did not invalidate fingerprint")
	}
	service.config.PromptVersion = "prompt-b"
	if current == service.fingerprint(7, "T-1", "watermark-a", "catalog-a", start) {
		t.Fatal("prompt version did not invalidate fingerprint")
	}
}