package openmeteo

import (
	"encoding/json"
	"testing"
	"time"

	"gitea.maximumdirect.net/ejr/weatherfeeder/model"
	"gitea.maximumdirect.net/ejr/weatherfeeder/standards"
)

func TestBuildForecastUsesCanonicalTextDescription(t *testing.T) {
	weatherCode := 2
	isDay := 1

	parsed := omForecastResponse{
		Timezone:         "UTC",
		UTCOffsetSeconds: 0,
		Hourly: omForecastHourly{
			Time:        []string{"2026-03-16T19:00"},
			WeatherCode: []*int{&weatherCode},
			IsDay:       []*int{&isDay},
		},
	}

	run, effectiveAt, err := buildForecast(parsed, time.Time{})
	if err != nil {
		t.Fatalf("buildForecast() error = %v", err)
	}
	if len(run.Periods) != 1 {
		t.Fatalf("periods len = %d, want 1", len(run.Periods))
	}

	expectedText := standards.WMOText(model.WMOCode(weatherCode), boolPtr(true))
	if got := run.Periods[0].TextDescription; got != expectedText {
		t.Fatalf("TextDescription = %q, want %q", got, expectedText)
	}

	wantIssued := time.Date(2026, 3, 16, 19, 0, 0, 0, time.UTC)
	if !run.IssuedAt.Equal(wantIssued) {
		t.Fatalf("IssuedAt = %s, want %s", run.IssuedAt.Format(time.RFC3339), wantIssued.Format(time.RFC3339))
	}
	if !effectiveAt.Equal(wantIssued) {
		t.Fatalf("effectiveAt = %s, want %s", effectiveAt.Format(time.RFC3339), wantIssued.Format(time.RFC3339))
	}

	assertNoLegacyForecastDescriptionKeys(t, run.Periods[0])
}

func boolPtr(v bool) *bool {
	return &v
}

func assertNoLegacyForecastDescriptionKeys(t *testing.T, period any) {
	t.Helper()

	b, err := json.Marshal(period)
	if err != nil {
		t.Fatalf("json.Marshal(period) error = %v", err)
	}
	var got map[string]any
	if err := json.Unmarshal(b, &got); err != nil {
		t.Fatalf("json.Unmarshal(period) error = %v", err)
	}

	for _, key := range []string{"conditionText", "providerRawDescription", "detailedText", "iconUrl"} {
		if _, ok := got[key]; ok {
			t.Fatalf("unexpected legacy key %q in marshaled period: %#v", key, got)
		}
	}
}