package adapter_test

import (
	"testing"
	"time"

	"github.com/ThreeDotsLabs/watermill/message"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"go.yandata.net/iod/iod/trustlog-sdk/api/adapter"
	"go.yandata.net/iod/iod/trustlog-sdk/api/logger"
)

// 验证 TCPPublisher 实现了 message.Publisher 接口
func TestTCPPublisher_ImplementsPublisherInterface(t *testing.T) {
	var _ message.Publisher = (*adapter.TCPPublisher)(nil)
}

func TestNewTCPPublisher_Success(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	// 首先创建一个订阅者作为服务器
	subscriberConfig := adapter.TCPSubscriberConfig{
		ListenAddr: "127.0.0.1:19090",
	}
	subscriber, err := adapter.NewTCPSubscriber(subscriberConfig, log)
	require.NoError(t, err)
	defer subscriber.Close()

	// 等待服务器启动
	time.Sleep(100 * time.Millisecond)

	// 创建 Publisher
	config := adapter.TCPPublisherConfig{
		ServerAddr:     "127.0.0.1:19090",
		ConnectTimeout: 2 * time.Second,
	}
	publisher, err := adapter.NewTCPPublisher(config, log)
	require.NoError(t, err)
	assert.NotNil(t, publisher)

	err = publisher.Close()
	require.NoError(t, err)
}

func TestNewTCPPublisher_InvalidServerAddr(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	config := adapter.TCPPublisherConfig{
		ServerAddr:     "",
		ConnectTimeout: 2 * time.Second,
	}
	_, err := adapter.NewTCPPublisher(config, log)
	require.Error(t, err)
	assert.ErrorIs(t, err, adapter.ErrServerAddrRequired)
}

func TestNewTCPPublisher_ConnectionFailed(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	// 尝试连接到不存在的服务器
	config := adapter.TCPPublisherConfig{
		ServerAddr:     "127.0.0.1:19999",
		ConnectTimeout: 1 * time.Second,
	}
	_, err := adapter.NewTCPPublisher(config, log)
	require.Error(t, err)
	assert.Contains(t, err.Error(), "failed to connect")
}

func TestTCPPublisher_Publish_NoWaitForAck(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	// 创建订阅者
	subscriberConfig := adapter.TCPSubscriberConfig{
		ListenAddr: "127.0.0.1:19091",
	}
	subscriber, err := adapter.NewTCPSubscriber(subscriberConfig, log)
	require.NoError(t, err)
	defer subscriber.Close()

	time.Sleep(100 * time.Millisecond)

	// 创建 Publisher
	config := adapter.TCPPublisherConfig{
		ServerAddr:     "127.0.0.1:19091",
		ConnectTimeout: 2 * time.Second,
	}
	publisher, err := adapter.NewTCPPublisher(config, log)
	require.NoError(t, err)
	defer publisher.Close()

	// 发送消息，应该立即返回成功，不等待ACK
	msg := message.NewMessage("test-uuid-1", []byte("test payload"))
	start := time.Now()
	err = publisher.Publish("test-topic", msg)
	elapsed := time.Since(start)

	// 验证发送成功
	require.NoError(t, err)

	// 验证发送速度很快（不应该等待ACK超时）
	// 应该在100ms内返回（实际应该只需要几毫秒）
	assert.Less(t, elapsed, 100*time.Millisecond, "Publish should return immediately without waiting for ACK")
}

func TestTCPPublisher_Publish_MultipleMessages(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	// 创建订阅者
	subscriberConfig := adapter.TCPSubscriberConfig{
		ListenAddr: "127.0.0.1:19092",
	}
	subscriber, err := adapter.NewTCPSubscriber(subscriberConfig, log)
	require.NoError(t, err)
	defer subscriber.Close()

	time.Sleep(100 * time.Millisecond)

	// 创建 Publisher
	config := adapter.TCPPublisherConfig{
		ServerAddr:     "127.0.0.1:19092",
		ConnectTimeout: 2 * time.Second,
	}
	publisher, err := adapter.NewTCPPublisher(config, log)
	require.NoError(t, err)
	defer publisher.Close()

	// 发送多条消息
	msg1 := message.NewMessage("uuid-1", []byte("payload-1"))
	msg2 := message.NewMessage("uuid-2", []byte("payload-2"))
	msg3 := message.NewMessage("uuid-3", []byte("payload-3"))

	start := time.Now()
	err = publisher.Publish("test-topic", msg1, msg2, msg3)
	elapsed := time.Since(start)

	require.NoError(t, err)
	// 发送3条消息应该很快完成
	assert.Less(t, elapsed, 200*time.Millisecond, "Publishing multiple messages should be fast")
}

func TestTCPPublisher_Publish_AfterClose(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	// 创建订阅者
	subscriberConfig := adapter.TCPSubscriberConfig{
		ListenAddr: "127.0.0.1:19093",
	}
	subscriber, err := adapter.NewTCPSubscriber(subscriberConfig, log)
	require.NoError(t, err)
	defer subscriber.Close()

	time.Sleep(100 * time.Millisecond)

	// 创建 Publisher
	config := adapter.TCPPublisherConfig{
		ServerAddr:     "127.0.0.1:19093",
		ConnectTimeout: 2 * time.Second,
	}
	publisher, err := adapter.NewTCPPublisher(config, log)
	require.NoError(t, err)

	// 关闭 Publisher
	err = publisher.Close()
	require.NoError(t, err)

	// 尝试在关闭后发送消息
	msg := message.NewMessage("uuid", []byte("payload"))
	err = publisher.Publish("test-topic", msg)
	require.Error(t, err)
	assert.ErrorIs(t, err, adapter.ErrPublisherClosed)
}

func TestTCPPublisher_Publish_NilMessage(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	// 创建订阅者
	subscriberConfig := adapter.TCPSubscriberConfig{
		ListenAddr: "127.0.0.1:19094",
	}
	subscriber, err := adapter.NewTCPSubscriber(subscriberConfig, log)
	require.NoError(t, err)
	defer subscriber.Close()

	time.Sleep(100 * time.Millisecond)

	// 创建 Publisher
	config := adapter.TCPPublisherConfig{
		ServerAddr:     "127.0.0.1:19094",
		ConnectTimeout: 2 * time.Second,
	}
	publisher, err := adapter.NewTCPPublisher(config, log)
	require.NoError(t, err)
	defer publisher.Close()

	// 发送 nil 消息应该被忽略
	err = publisher.Publish("test-topic", nil)
	require.NoError(t, err)
}

func TestTCPPublisher_Close_Multiple(t *testing.T) {
	t.Parallel()

	log := logger.NewNopLogger()

	// 创建订阅者
	subscriberConfig := adapter.TCPSubscriberConfig{
		ListenAddr: "127.0.0.1:19095",
	}
	subscriber, err := adapter.NewTCPSubscriber(subscriberConfig, log)
	require.NoError(t, err)
	defer subscriber.Close()

	time.Sleep(100 * time.Millisecond)

	// 创建 Publisher
	config := adapter.TCPPublisherConfig{
		ServerAddr:     "127.0.0.1:19095",
		ConnectTimeout: 2 * time.Second,
	}
	publisher, err := adapter.NewTCPPublisher(config, log)
	require.NoError(t, err)

	// 多次关闭应该不会报错
	err = publisher.Close()
	require.NoError(t, err)

	err = publisher.Close()
	require.NoError(t, err)
}