package socket

import (
	"context"
	"net"
	"testing"
	"time"

	altv1 "git.toki-labs.com/toki/alt/packages/contracts/gen/go/alt/v1"
	"git.toki-labs.com/toki/alt/services/worker/internal/config"
	workerContracts "git.toki-labs.com/toki/alt/services/worker/internal/contracts"
	protoSocket "git.toki-labs.com/toki/proto-socket/go"
)

func TestWorkerSocketServerHello(t *testing.T) {
	// Get temporary port
	l, err := net.Listen("tcp", "127.0.0.1:0")
	if err != nil {
		t.Fatalf("failed to listen on temporary port: %v", err)
	}
	port := l.Addr().(*net.TCPAddr).Port
	l.Close()

	cfg := config.Config{
		Host:       "127.0.0.1",
		Port:       port,
		SocketPath: "/socket",
	}

	ctx, cancel := context.WithCancel(context.Background())
	defer cancel()

	server := NewServer(cfg)
	if err := server.Start(ctx); err != nil {
		t.Fatalf("failed to start worker socket server: %v", err)
	}
	defer server.Stop()

	// Wait slightly for server setup
	time.Sleep(50 * time.Millisecond)

	// Dial
	client, err := protoSocket.DialWs(ctx, "127.0.0.1", port, "/socket", workerContracts.ParserMap())
	if err != nil {
		t.Fatalf("failed to dial worker socket server: %v", err)
	}
	defer client.Close()

	// Send HelloRequest
	req := &altv1.HelloRequest{
		AltProtocolVersion: "alt.v1",
	}
	
	res, err := protoSocket.SendRequestTyped[*altv1.HelloRequest, *altv1.HelloResponse](&client.Communicator, req, 2*time.Second)
	if err != nil {
		t.Fatalf("failed to send HelloRequest: %v", err)
	}

	if res.ServerName != "alt-worker" {
		t.Errorf("expected ServerName to be %q, got %q", "alt-worker", res.ServerName)
	}
	if res.AltProtocolVersion != "alt.v1" {
		t.Errorf("expected AltProtocolVersion to be %q, got %q", "alt.v1", res.AltProtocolVersion)
	}
}

func TestSessionHandlers(t *testing.T) {
	handlers := sessionHandlers()
	
	hasHello := false
	seenTypes := make(map[string]bool)

	for _, h := range handlers {
		if h.requestType == "" {
			t.Error("handler requestType cannot be empty")
		}
		if h.register == nil {
			t.Errorf("handler for %q has nil register function", h.requestType)
		}

		if seenTypes[h.requestType] {
			t.Errorf("duplicate handler registration for requestType %q", h.requestType)
		}
		seenTypes[h.requestType] = true

		if h.requestType == "alt.v1.HelloRequest" {
			hasHello = true
		}
	}

	if !hasHello {
		t.Error("expected alt.v1.HelloRequest to be registered in session handlers")
	}
}

func TestRegisterHandlers(t *testing.T) {
	t.Run("skip nil register", func(t *testing.T) {
		handlers := []sessionHandler{
			{
				requestType: "test.DummyRequest",
				register:    nil,
			},
		}
		registerHandlers(nil, handlers)
	})
}