package main

import (
	"context"
	"fmt"
	"net"
	"tailly_messages/proto"
	"testing"
	"time"

	"github.com/jackc/pgx/v4/pgxpool"
	amqp "github.com/rabbitmq/amqp091-go"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
	"google.golang.org/grpc"
	"google.golang.org/grpc/test/bufconn"
)

const bufSize = 1024 * 1024

func setupTestServer(t *testing.T) (*grpc.Server, *bufconn.Listener, *server) {
	// Setup in-memory connection
	lis := bufconn.Listen(bufSize)
	s := grpc.NewServer()

	// Используем реальные подключения из server.go
	dbURL := "postgres://tailly_v2:i0Oq%2675LA%26M612ceuy@79.174.89.104:15452/tailly_v2"
	pool, err := pgxpool.Connect(context.Background(), dbURL)
	require.NoError(t, err, "Failed to connect to test database")

	rabbitURL := "amqp://tailly_rabbitmq:o2p2S80MPbl27LUU@89.104.69.222:5673/"
	rabbitConn, err := amqp.DialConfig(rabbitURL, amqp.Config{
		Heartbeat: 10 * time.Second,
		Locale:    "en_US",
	})
	require.NoError(t, err, "Failed to connect to RabbitMQ")

	testServer := NewServer(pool, rabbitConn)
	proto.RegisterMessageServiceServer(s, testServer)

	go func() {
		if err := s.Serve(lis); err != nil {
			t.Logf("Server exited with error: %v", err)
		}
	}()

	// Очищаем только тестовые данные после завершения тестов
	t.Cleanup(func() {
		// Удаляем только те данные, которые создали в тестах
		_, _ = pool.Exec(context.Background(), "DELETE FROM messages WHERE content = 'test message'")
		_, _ = pool.Exec(context.Background(), "DELETE FROM chats WHERE user1_id = 1 AND user2_id = 2")
	})

	return s, lis, testServer
}

func TestCreateChat(t *testing.T) {
	s, lis, _ := setupTestServer(t)
	defer s.Stop()

	ctx := context.Background()
	conn, err := grpc.DialContext(ctx, "bufnet", grpc.WithContextDialer(func(context.Context, string) (net.Conn, error) {
		return lis.Dial()
	}), grpc.WithInsecure())
	require.NoError(t, err)
	defer conn.Close()

	client := proto.NewMessageServiceClient(conn)

	req := &proto.CreateChatRequest{
		User1Id: 1,
		User2Id: 2,
	}

	resp, err := client.CreateChat(ctx, req)
	require.NoError(t, err)
	require.NotNil(t, resp)
	require.NotNil(t, resp.GetChat())
	assert.Equal(t, int32(1), resp.GetChat().GetUser1Id())
	assert.Equal(t, int32(2), resp.GetChat().GetUser2Id())
}

func TestSendAndStreamMessages(t *testing.T) {
	s, lis, _ := setupTestServer(t)
	defer s.Stop()

	ctx := context.Background()
	conn, err := grpc.DialContext(ctx, "bufnet", grpc.WithContextDialer(func(context.Context, string) (net.Conn, error) {
		return lis.Dial()
	}), grpc.WithInsecure())
	require.NoError(t, err)
	defer conn.Close()

	client := proto.NewMessageServiceClient(conn)

	// Сначала создаем чат
	chatResp, err := client.CreateChat(ctx, &proto.CreateChatRequest{
		User1Id: 1,
		User2Id: 2,
	})
	require.NoError(t, err)
	chatId := chatResp.GetChat().GetId()

	// Запускаем стрим
	streamReq := &proto.StreamMessagesRequest{UserId: 2}
	stream, err := client.StreamMessages(ctx, streamReq)
	require.NoError(t, err)

	// Отправляем сообщение
	sendReq := &proto.SendMessageRequest{
		ChatId:   chatId,
		SenderId: 1,
		Content:  "test message",
	}
	_, err = client.SendMessage(ctx, sendReq)
	require.NoError(t, err)

	// Пытаемся получить сообщение через стрим
	done := make(chan bool)
	go func() {
		resp, err := stream.Recv()
		assert.NoError(t, err)
		if resp.GetMessage() != nil { // Игнорируем heartbeat сообщения
			assert.Equal(t, "test message", resp.GetMessage().GetContent())
			done <- true
		}
	}()

	select {
	case <-done:
		// Успех
	case <-time.After(5 * time.Second):
		t.Fatal("Timeout waiting for message")
	}
}
func TestMultipleMessages(t *testing.T) {
	s, lis, _ := setupTestServer(t)
	defer s.Stop()

	ctx := context.Background()
	conn, err := grpc.DialContext(ctx, "bufnet", grpc.WithContextDialer(func(context.Context, string) (net.Conn, error) {
		return lis.Dial()
	}), grpc.WithInsecure())
	require.NoError(t, err)
	defer conn.Close()

	client := proto.NewMessageServiceClient(conn)

	// Создаем чат
	chatResp, err := client.CreateChat(ctx, &proto.CreateChatRequest{
		User1Id: 1,
		User2Id: 2,
	})
	require.NoError(t, err)
	chatId := chatResp.GetChat().GetId()

	// Запускаем стрим
	streamReq := &proto.StreamMessagesRequest{UserId: 2}
	stream, err := client.StreamMessages(ctx, streamReq)
	require.NoError(t, err)

	// Отправляем 5 сообщений
	for i := 0; i < 5; i++ {
		sendReq := &proto.SendMessageRequest{
			ChatId:   chatId,
			SenderId: 1,
			Content:  fmt.Sprintf("test message %d", i+1),
		}
		_, err = client.SendMessage(ctx, sendReq)
		require.NoError(t, err)
	}

	// Проверяем получение всех сообщений
	received := 0
	done := make(chan bool)
	go func() {
		for {
			resp, err := stream.Recv()
			if err != nil {
				t.Logf("Stream error: %v", err)
				break
			}
			if resp.GetMessage() != nil {
				t.Logf("Received message: %s", resp.GetMessage().GetContent())
				received++
				if received >= 5 {
					done <- true
					break
				}
			}
		}
	}()

	select {
	case <-done:
		// Успех
		assert.Equal(t, 5, received)
	case <-time.After(10 * time.Second):
		t.Fatal("Timeout waiting for messages")
	}
}