package httpattr

import "testing"

func lookup(m map[string]string) Lookup {
	return func(keys ...string) string {
		for _, k := range keys {
			if v := m[k]; v != "" {
				return v
			}
		}
		return ""
	}
}

func TestExtractVariants(t *testing.T) {
	cases := []struct {
		name  string
		attrs map[string]string
		want  string
	}{
		{"stable semconv", map[string]string{"http.request.method": "get", "url.path": "/api/orders/"}, "GET /api/orders"},
		{"legacy nginx target", map[string]string{"http.method": "GET", "http.target": "/api/orders?x=1"}, "GET /api/orders"},
		{"go http.url", map[string]string{"http.method": "POST", "http.url": "https://shop.example.com:8443/api/cart?a=b"}, "POST /api/cart"},
		{"browser url.full", map[string]string{"http.request.method": "GET", "url.full": "https://shop.example.com/api/orders#x"}, "GET /api/orders"},
		{"relative url.full", map[string]string{"http.request.method": "GET", "url.full": "api/orders"}, "GET /api/orders"},
	}
	for _, c := range cases {
		if got := Extract(lookup(c.attrs)).Key(); got != c.want {
			t.Errorf("%s: got %q want %q", c.name, got, c.want)
		}
	}
}

func TestExtractHostAndMountRoute(t *testing.T) {
	e := Extract(lookup(map[string]string{"http.route": "/", "url.path": "/x", "server.address": "API.example.com:443"}))
	if e.Host != "api.example.com" || e.Route != "" {
		t.Fatalf("got %+v", e)
	}
}

func TestStripPrefix(t *testing.T) {
	p := []string{"/api", "/api/v2"}
	for in, want := range map[string]string{"/api/orders": "/orders", "/api/v2/orders": "/orders", "/api": "/", "/apix": "/apix", "/other": "/other"} {
		if got := StripPrefix(in, p); got != want {
			t.Errorf("%s: got %q want %q", in, got, want)
		}
	}
}