package changes

import (
	"testing"

	"gitea.maximumdirect.net/eric/weatherreporter/internal/module"
)

func TestCompareThreeDayDetectsDayChanges(t *testing.T) {
	previous := outlookSnapshot(t, "2026-05-29", "70", 20, "9 AM", false)
	current := outlookSnapshot(t, "2026-05-29", "78", 70, "12 PM", true)

	changes, err := CompareThreeDay(previous, current, Thresholds{
		TemperatureDegrees:       5,
		PrecipProbabilityPoints:  20,
		PrecipTimingShiftMinutes: 120,
	})
	if err != nil {
		t.Fatalf("CompareThreeDay() error = %v", err)
	}

	if len(changes) == 0 {
		t.Fatal("changes length = 0, want detected 3-day changes")
	}
	if countType(changes, "outlook_precip_probability_change") == 0 || countType(changes, "outlook_snow_risk_change") == 0 {
		t.Fatalf("changes = %#v, want precipitation and snow changes", changes)
	}
}

func outlookSnapshot(t *testing.T, date string, tempRange string, precip int, precipTime string, snow bool) module.Snapshot {
	t.Helper()
	return snapshot(t, module.Output{ID: module.DerivedDaypartSummaries, StanzaName: "derived_daypart_summaries", Value: map[string]daypartSummaryStanza{
		date + "_morning": {
			Date:          date,
			PeriodBegins:  date + " at 6:00 AM",
			PeriodEnds:    date + " at 10:00 AM",
			TempRangeF:    tempRange,
			MaxPopPercent: &precip,
			MaxPopTime:    precipTime,
			Snow:          snow,
		},
	}})
}