package bootstrap

import (
	"context"
	"net"
	"testing"

	"iop/packages/go/config"
)

// TestNewRuntimeWiresControlPlaneConnector verifies that NewRuntime always
// wires a non-nil ControlPlane connector regardless of config.
func TestNewRuntimeWiresControlPlaneConnector(t *testing.T) {
	cfg := newTestConfig()
	rt, err := NewRuntime(cfg)
	if err != nil {
		t.Fatalf("NewRuntime: %v", err)
	}
	if rt.ControlPlane == nil {
		t.Fatal("expected non-nil ControlPlane connector")
	}
}

// TestNewRuntimeWiresStatusProviderIntoConnector verifies that NewRuntime wires
// the edge service as the Control Plane connector's status provider, so status
// requests are answered from the Edge-owned node snapshot surface.
func TestNewRuntimeWiresStatusProviderIntoConnector(t *testing.T) {
	cfg := newTestConfig()
	rt, err := NewRuntime(cfg)
	if err != nil {
		t.Fatalf("NewRuntime: %v", err)
	}
	if !rt.ControlPlane.StatusProviderConfigured() {
		t.Fatal("expected NewRuntime to wire a status provider into the connector")
	}
}

// TestNewRuntimeWiresNodeEventBusIntoConnector verifies that node lifecycle
// events are relayed through the shared events.Bus boundary.
func TestNewRuntimeWiresNodeEventBusIntoConnector(t *testing.T) {
	cfg := newTestConfig()
	rt, err := NewRuntime(cfg)
	if err != nil {
		t.Fatalf("NewRuntime: %v", err)
	}
	if !rt.ControlPlane.NodeEventBusConfigured() {
		t.Fatal("expected NewRuntime to wire the node event bus into the connector")
	}
}

// TestRuntimeStartsControlPlaneConnectorWhenEnabled verifies that Start does
// not fail when a Control Plane connector is configured with a local fake
// server accepting hello. Uses a local TCP fake endpoint.
func TestRuntimeStartsControlPlaneConnectorWhenEnabled(t *testing.T) {
	// Start a minimal fake Control Plane server.
	ln, err := net.Listen("tcp", "127.0.0.1:0")
	if err != nil {
		t.Fatalf("listen fake cp: %v", err)
	}
	cpAddr := ln.Addr().String()
	go func() {
		// Accept and immediately close; connector will fail hello and retry,
		// but Start() itself must succeed (connector errors are async).
		conn, err := ln.Accept()
		if err != nil {
			return
		}
		_ = conn.Close()
		_ = ln.Close()
	}()

	cfg := newTestConfig()
	cfg.ControlPlane = config.EdgeControlPlaneConf{
		Enabled:              true,
		WireAddr:             cpAddr,
		ReconnectIntervalSec: 60,
	}

	rt, err := NewRuntime(cfg)
	if err != nil {
		t.Fatalf("NewRuntime: %v", err)
	}
	if !rt.ControlPlane.IsEnabled() {
		t.Fatal("expected connector IsEnabled()==true")
	}

	ctx := context.Background()
	if err := rt.Start(ctx); err != nil {
		t.Fatalf("Start with enabled connector: %v", err)
	}
	if err := rt.Stop(); err != nil {
		t.Fatalf("Stop: %v", err)
	}
}

// TestRuntimeStopsControlPlaneConnector verifies that Stop() reaches the
// ControlPlane connector. A disabled connector is used so no real network
// activity occurs.
func TestRuntimeStopsControlPlaneConnector(t *testing.T) {
	cfg := newTestConfig()
	// disabled connector; Start/Stop must be no-ops on the connector side.
	cfg.ControlPlane = config.EdgeControlPlaneConf{
		Enabled:  false,
		WireAddr: "",
	}

	rt, err := NewRuntime(cfg)
	if err != nil {
		t.Fatalf("NewRuntime: %v", err)
	}

	ctx := context.Background()
	if err := rt.Start(ctx); err != nil {
		t.Fatalf("Start: %v", err)
	}
	if err := rt.Stop(); err != nil {
		t.Fatalf("Stop: %v", err)
	}
	// After Stop, the connector must be in a stopped-or-no-op state.
	// For disabled connector, CurrentState is Disconnected (never started).
	// Calling Stop again must not panic.
	rt.ControlPlane.Stop()
}