package resolution

import (
	"reflect"
	"testing"

	mcat "git.novox.be/novox/mesh-sdk/go/catalogue"
)

func TestTheResolverConfigSeatIsGone(t *testing.T) {
	if _, known := mcat.SeatNamed("node-resolver-config"); known {
		t.Error("node-resolver-config is still in the mesh's set; the uplink's holder writes the resolver file")
	}
	// An uplink's holder needs no seat beside it for the file: it is its own.
	if got := DependsOn(nil, mod("networkmanager", nil, nil, nil, mcat.Claim{Name: "node-uplink"})); len(got) != 0 {
		t.Errorf("an uplink holder with nothing declared depends on %v", got)
	}
}

// The catalogue as it is: nothing claims the retired seat, and every manager the mesh knows holds the
// uplink and writes the resolver file; beside them only a holder of node-resolver does (ADR 0247).
func TestTheCataloguesUplinksWriteTheResolverFileAndNothingElseDoes(t *testing.T) {
	cat := map[string]mcat.Manifest{}
	for _, m := range theCatalogue(t) {
		cat[m.Module] = m
	}
	if got := PossibleHolders(cat, "node-uplink"); !reflect.DeepEqual(got, uplinks) {
		t.Errorf("node-uplink can be held by %v, not %v", got, uplinks)
	}
	for name, m := range cat {
		for _, c := range m.Claims {
			if c.Name == "node-resolver-config" {
				t.Errorf("%s still claims node-resolver-config", name)
			}
		}
		_, writes := m.Facts["resolvers"]
		isUplink := false
		for _, u := range uplinks {
			isUplink = isUplink || u == name
		}
		for _, f := range m.Facts {
			// Or the machine's own resolver's, where it is held (novox/hq ADR 0247): the uplink's holder
			// steps back from the file there, and nowhere else.
			if f.Path == "/etc/resolv.conf" && !isUplink && !holdsSeat(m, mcat.ResolverSeat) {
				t.Errorf("%s writes /etc/resolv.conf and holds neither the uplink nor the machine's resolver", name)
			}
		}
		for _, r := range m.Resources {
			if r["path"] == "/etc/resolv.conf" {
				t.Errorf("%s declares /etc/resolv.conf as a file of its own", name)
			}
		}
		if isUplink && !writes {
			t.Errorf("%s holds the uplink and does not write the resolver file", name)
		}
	}
}