package metricsapi

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

	"github.com/itworx/pulse/internal/auth"
	"github.com/itworx/pulse/internal/metriccatalog"
)

func TestCatalogRequiresAuthentication(t *testing.T) {
	registry, err := metriccatalog.DefaultRegistry()
	if err != nil {
		t.Fatal(err)
	}
	response := httptest.NewRecorder()
	request := httptest.NewRequest(http.MethodGet, "/api/v1/metrics/catalog", nil)
	Handler{Registry: registry}.ServeHTTP(response, request)
	if response.Code != http.StatusUnauthorized {
		t.Fatalf("status=%d body=%s", response.Code, response.Body.String())
	}
}

func TestCatalogReturnsVersionedBindingsAndSupportsETag(t *testing.T) {
	registry, err := metriccatalog.DefaultRegistry()
	if err != nil {
		t.Fatal(err)
	}
	handler := Handler{Registry: registry}
	request := httptest.NewRequest(http.MethodGet, "/api/v1/metrics/catalog", nil).WithContext(auth.WithPrincipal(context.Background(), auth.Principal{Subject: "viewer", Role: auth.RoleViewer}))
	response := httptest.NewRecorder()
	handler.ServeHTTP(response, request)
	if response.Code != http.StatusOK {
		t.Fatalf("status=%d body=%s", response.Code, response.Body.String())
	}
	if response.Header().Get("ETag") == "" {
		t.Fatal("missing ETag")
	}
	if len(response.Body.Bytes()) == 0 {
		t.Fatal("empty catalog")
	}
	etag := response.Header().Get("ETag")
	request = httptest.NewRequest(http.MethodGet, "/api/v1/metrics/catalog", nil).WithContext(auth.WithPrincipal(context.Background(), auth.Principal{Subject: "viewer", Role: auth.RoleViewer}))
	request.Header.Set("If-None-Match", etag)
	response = httptest.NewRecorder()
	handler.ServeHTTP(response, request)
	if response.Code != http.StatusNotModified {
		t.Fatalf("etag status=%d", response.Code)
	}
}