package cluster

import (
	"context"
	"testing"

	"webui4frpc/internal/store"
)

// TestRevokeTaskRemovesTopology: a revoke task published to the ring removes
// the forward from topology, calls Handler.Revoke, and logs forward.remove.
func TestRevokeTaskRemovesTopology(t *testing.T) {
	revoked := false
	eng := NewEngine("n1", "n1:7500", "u", "p", "0.71.0", nil,
		&fakeHandler{load: Load{MemPct: 5, NetPct: 5},
			revoke: func(ctx context.Context, tk *Task) error { revoked = true; return nil }},
		func(ctx context.Context, next string, tk *Token) error { return nil },
		"n1:7500", true, "")

	// establish a forward
	eng.state.AddPending(store.Local{Name: "web"}, store.Remote{Name: "frps1"}, store.Link{RemotePort: 18081})
	// lowest-load is n1 (only node): it claims + builds topology
	if _, err := eng.OnToken(context.Background(), &Token{Cycle: 1, State: eng.state}); err != nil {
		t.Fatal(err)
	}
	if len(eng.state.TopologyList()) != 1 {
		t.Fatalf("topology after claim = %+v", eng.state.TopologyList())
	}

	// publish a revoke task pointing at the same forward
	eng.state.AddRevoke(store.Local{Name: "web"}, store.Remote{Name: "frps1"}, store.Link{RemotePort: 18081})
	if _, err := eng.OnToken(context.Background(), &Token{Cycle: 2, State: eng.state}); err != nil {
		t.Fatal(err)
	}
	if len(eng.state.TopologyList()) != 0 {
		t.Fatalf("topology after revoke = %+v", eng.state.TopologyList())
	}
	if !revoked {
		t.Fatal("Handler.Revoke was not called")
	}
	// log should contain forward.remove
	var sawRemove bool
	for _, e := range eng.Log.Snapshot() {
		if e.Kind == LogForwardRemove {
			sawRemove = true
		}
	}
	if !sawRemove {
		t.Fatalf("log missing forward.remove: %+v", eng.Log.Snapshot())
	}
}

// TestRevokeIdempotent: revoking an already-missing forward does not error.
func TestRevokeIdempotent(t *testing.T) {
	eng := newTestEngine("n1", true)
	eng.state.AddRevoke(store.Local{Name: "ghost"}, store.Remote{Name: "frps1"}, store.Link{RemotePort: 1})
	if _, err := eng.OnToken(context.Background(), &Token{Cycle: 1, State: eng.state}); err != nil {
		t.Fatalf("revoke missing: %v", err)
	}
	// no topology entry, no panic
	if len(eng.state.TopologyList()) != 0 {
		t.Fatal("should be empty")
	}
}