package integration

import (
	"fmt"
	"net"
	"testing"
	"time"

	"github.com/noahlann/nnet/pkg/nnet"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

// TestConnectionManagerFind 测试连接查找
func TestConnectionManagerFind(t *testing.T) {
	listener, err := net.Listen("tcp", "127.0.0.1:0")
	require.NoError(t, err)
	port := listener.Addr().(*net.TCPAddr).Port
	listener.Close()

	cfg := &nnet.Config{
		Addr: fmt.Sprintf("tcp://127.0.0.1:%d", port),
	}

	ts := StartTestServerWithRoutes(t, cfg, func(srv nnet.Server) {
		srv.Router().RegisterString("getid", func(ctx nnet.Context) error {
			connID := ctx.Connection().ID()
			return ctx.Response().WriteBytes([]byte(connID + "\n"))
		})
	})
	defer CleanupTestServer(t, ts)

	client := NewTestClient(t, ts.Addr, nil)
	defer CleanupTestClient(t, client)

	ConnectTestClient(t, client)
	time.Sleep(100 * time.Millisecond)

	// 获取连接ID
	resp := RequestWithTimeout(t, client, []byte("getid"), 3*time.Second)
	connID := string(resp)
	connID = connID[:len(connID)-1] // 去掉换行符
	t.Logf("Connection ID: %s", connID)

	// 查找连接
	connMgr := ts.Server.ConnectionManager()
	conn, err := connMgr.Get(connID)
	require.NoError(t, err, "Connection should be found")
	require.NotNil(t, conn, "Connection should not be nil")
	assert.Equal(t, connID, conn.ID(), "Connection ID should match")
}

// TestConnectionManagerGroup 测试连接分组
func TestConnectionManagerGroup(t *testing.T) {
	const groupID = "test-group"
	listener, err := net.Listen("tcp", "127.0.0.1:0")
	require.NoError(t, err)
	port := listener.Addr().(*net.TCPAddr).Port
	listener.Close()

	cfg := &nnet.Config{
		Addr: fmt.Sprintf("tcp://127.0.0.1:%d", port),
	}

	ts := StartTestServerWithRoutes(t, cfg, func(srv nnet.Server) {
		connMgr := srv.ConnectionManager()

		srv.Router().RegisterString("join", func(ctx nnet.Context) error {
			connID := ctx.Connection().ID()
			err := connMgr.AddToGroup(groupID, connID)
			if err != nil {
				return ctx.Response().WriteBytes([]byte("error: " + err.Error() + "\n"))
			}
			return ctx.Response().WriteBytes([]byte("joined\n"))
		})

		srv.Router().RegisterString("leave", func(ctx nnet.Context) error {
			connID := ctx.Connection().ID()
			err := connMgr.RemoveFromGroup(groupID, connID)
			if err != nil {
				return ctx.Response().WriteBytes([]byte("error: " + err.Error() + "\n"))
			}
			return ctx.Response().WriteBytes([]byte("left\n"))
		})

		srv.Router().RegisterString("count", func(ctx nnet.Context) error {
			group := connMgr.GetGroup(groupID)
			count := len(group)
			return ctx.Response().WriteBytes([]byte(fmt.Sprintf("count: %d\n", count)))
		})
	})
	defer CleanupTestServer(t, ts)

	// 创建两个客户端
	client1 := NewTestClient(t, ts.Addr, nil)
	defer CleanupTestClient(t, client1)
	ConnectTestClient(t, client1)

	client2 := NewTestClient(t, ts.Addr, nil)
	defer CleanupTestClient(t, client2)
	ConnectTestClient(t, client2)

	time.Sleep(100 * time.Millisecond)

	// 两个客户端都加入分组
	resp := RequestWithTimeout(t, client1, []byte("join"), 3*time.Second)
	assert.Contains(t, string(resp), "joined", "Client1 should join group")

	resp = RequestWithTimeout(t, client2, []byte("join"), 3*time.Second)
	assert.Contains(t, string(resp), "joined", "Client2 should join group")

	// 检查分组大小（通过服务器端验证）
	connMgr := ts.Server.ConnectionManager()
	group := connMgr.GetGroup(groupID)
	assert.Len(t, group, 2, "Group should have 2 connections")

	// 一个客户端离开分组
	resp = RequestWithTimeout(t, client1, []byte("leave"), 3*time.Second)
	assert.Contains(t, string(resp), "left", "Client1 should leave group")

	// 检查分组大小
	group = connMgr.GetGroup(groupID)
	assert.Len(t, group, 1, "Group should have 1 connection")
}

// TestConnectionManagerBroadcast 测试分组广播
func TestConnectionManagerBroadcast(t *testing.T) {
	const groupID = "broadcast-group"
	listener, err := net.Listen("tcp", "127.0.0.1:0")
	require.NoError(t, err)
	port := listener.Addr().(*net.TCPAddr).Port
	listener.Close()

	cfg := &nnet.Config{
		Addr: fmt.Sprintf("tcp://127.0.0.1:%d", port),
	}

	ts := StartTestServerWithRoutes(t, cfg, func(srv nnet.Server) {
		connMgr := srv.ConnectionManager()

		srv.Router().RegisterString("join", func(ctx nnet.Context) error {
			connID := ctx.Connection().ID()
			return connMgr.AddToGroup(groupID, connID)
		})

		srv.Router().RegisterString("broadcast", func(ctx nnet.Context) error {
			message := []byte("broadcast message\n")
			return connMgr.BroadcastToGroup(groupID, message)
		})
	})
	defer CleanupTestServer(t, ts)

	// 创建两个客户端
	client1 := NewTestClient(t, ts.Addr, nil)
	defer CleanupTestClient(t, client1)
	ConnectTestClient(t, client1)

	client2 := NewTestClient(t, ts.Addr, nil)
	defer CleanupTestClient(t, client2)
	ConnectTestClient(t, client2)

	time.Sleep(100 * time.Millisecond)

	// 两个客户端都加入分组
	RequestWithTimeout(t, client1, []byte("join"), 3*time.Second)
	RequestWithTimeout(t, client2, []byte("join"), 3*time.Second)

	time.Sleep(100 * time.Millisecond)

	// 发送广播
	RequestWithTimeout(t, client1, []byte("broadcast"), 3*time.Second)

	// 两个客户端都应该收到广播消息
	time.Sleep(200 * time.Millisecond)

	// 注意：这里需要检查客户端是否支持接收异步消息
	// 如果客户端不支持，可能需要使用其他方式验证广播
	t.Logf("Broadcast sent, clients should receive message")
}