package nws

import (
	"context"
	"net/http"
	"net/http/httptest"
	"testing"

	"gitea.maximumdirect.net/ejr/feedkit/config"
	"gitea.maximumdirect.net/ejr/feedkit/event"
)

func TestObservationSourcePollReturnsNoEventsOn304(t *testing.T) {
	var call int
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		call++
		switch call {
		case 1:
			w.Header().Set("ETag", `"obs-v1"`)
			_, _ = w.Write([]byte(`{"id":"obs-1","properties":{"timestamp":"2026-03-28T12:00:00Z"}}`))
		case 2:
			if got := r.Header.Get("If-None-Match"); got != `"obs-v1"` {
				t.Fatalf("second request If-None-Match = %q", got)
			}
			w.WriteHeader(http.StatusNotModified)
		default:
			t.Fatalf("unexpected call count %d", call)
		}
	}))
	defer srv.Close()

	src, err := NewObservationSource(config.SourceConfig{
		Name:   "NWSObservationTest",
		Driver: "nws_observation",
		Mode:   config.SourceModePoll,
		Params: map[string]any{
			"url":        srv.URL,
			"user_agent": "test-agent",
		},
	})
	if err != nil {
		t.Fatalf("NewObservationSource() error = %v", err)
	}

	first, err := src.Poll(context.Background())
	if err != nil {
		t.Fatalf("first Poll() error = %v", err)
	}
	if len(first) != 1 {
		t.Fatalf("first Poll() len = %d, want 1", len(first))
	}
	if first[0].Kind != event.Kind("observation") {
		t.Fatalf("first Poll() kind = %q", first[0].Kind)
	}

	second, err := src.Poll(context.Background())
	if err != nil {
		t.Fatalf("second Poll() error = %v", err)
	}
	if len(second) != 0 {
		t.Fatalf("second Poll() len = %d, want 0", len(second))
	}
}