package highclient_test

import (
	"errors"
	"fmt"
	"testing"
	"time"

	"github.com/ThreeDotsLabs/watermill/message"
	"github.com/go-logr/logr"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/mock"
	"github.com/stretchr/testify/require"

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

// MockPublisher 模拟 message.Publisher.
type MockPublisher struct {
	mock.Mock
}

func (m *MockPublisher) Publish(topic string, messages ...*message.Message) error {
	args := m.Called(topic, messages)
	return args.Error(0)
}

func (m *MockPublisher) Close() error {
	args := m.Called()
	return args.Error(0)
}

// generateTestKeys 生成测试用的SM2密钥对（DER格式）.
func generateTestKeys(t testing.TB) ([]byte, []byte) {
	keyPair, err := model.GenerateSM2KeyPair()
	if err != nil {
		if t != nil {
			require.NoError(t, err)
		} else {
			panic(err)
		}
	}

	// 私钥：DER编码
	privateKeyDER, err := model.MarshalSM2PrivateDER(keyPair.Private)
	if err != nil {
		if t != nil {
			require.NoError(t, err)
		} else {
			panic(err)
		}
	}

	// 公钥：DER编码
	publicKeyDER, err := model.MarshalSM2PublicDER(keyPair.Public)
	if err != nil {
		if t != nil {
			require.NoError(t, err)
		} else {
			panic(err)
		}
	}

	return privateKeyDER, publicKeyDER
}

func TestNewClient(t *testing.T) {
	mockPublisher := &MockPublisher{}
	testLogger := logger.NewLogger(logr.Discard())
	privateKey, publicKey := generateTestKeys(t)
	config := model.NewSM2EnvelopeConfig(privateKey, publicKey)

	client := highclient.NewClient(mockPublisher, testLogger, config)

	require.NotNil(t, client)
	assert.Equal(t, mockPublisher, client.GetLow())
}

func TestClient_GetLow(t *testing.T) {
	mockPublisher := &MockPublisher{}
	testLogger := logger.NewLogger(logr.Discard())
	privateKey, publicKey := generateTestKeys(t)
	config := model.NewSM2EnvelopeConfig(privateKey, publicKey)

	client := highclient.NewClient(mockPublisher, testLogger, config)

	lowLevelPublisher := client.GetLow()
	assert.Equal(t, mockPublisher, lowLevelPublisher)
}

func TestClient_OperationPublish(t *testing.T) { //nolint:dupl // 测试代码中的重复模式是合理的
	tests := []struct {
		name        string
		operation   *model.Operation
		setupMock   func(*MockPublisher)
		wantErr     bool
		errContains string
	}{
		{
			name:      "成功发布Operation",
			operation: createTestOperation(t),
			setupMock: func(mp *MockPublisher) {
				mp.On("Publish", adapter.OperationTopic, mock.AnythingOfType("[]*message.Message")).Return(nil).Once()
			},
			wantErr: false,
		},
		{
			name:      "发布失败",
			operation: createTestOperation(t),
			setupMock: func(mp *MockPublisher) {
				mp.On("Publish", adapter.OperationTopic, mock.AnythingOfType("[]*message.Message")).
					Return(errors.New("publish failed")).
					Once()
			},
			wantErr:     true,
			errContains: "publish failed",
		},
		{
			name:      "nil Operation应该失败",
			operation: nil,
			setupMock: func(_ *MockPublisher) {
				// nil operation不会调用Publish，因为会在之前失败
			},
			wantErr: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			mockPublisher := &MockPublisher{}
			testLogger := logger.NewLogger(logr.Discard())
			privateKey, publicKey := generateTestKeys(t)
			config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
			tt.setupMock(mockPublisher)

			client := highclient.NewClient(mockPublisher, testLogger, config)

			err := client.OperationPublish(tt.operation)
			if tt.wantErr {
				require.Error(t, err)
				if tt.errContains != "" {
					assert.Contains(t, err.Error(), tt.errContains)
				}
			} else {
				require.NoError(t, err)
			}

			mockPublisher.AssertExpectations(t)
		})
	}
}

func TestClient_RecordPublish(t *testing.T) { //nolint:dupl // 测试代码中的重复模式是合理的
	tests := []struct {
		name        string
		record      *model.Record
		setupMock   func(*MockPublisher)
		wantErr     bool
		errContains string
	}{
		{
			name:   "成功发布Record",
			record: createTestRecord(t),
			setupMock: func(mp *MockPublisher) {
				mp.On("Publish", adapter.RecordTopic, mock.AnythingOfType("[]*message.Message")).Return(nil).Once()
			},
			wantErr: false,
		},
		{
			name:   "发布失败",
			record: createTestRecord(t),
			setupMock: func(mp *MockPublisher) {
				mp.On("Publish", adapter.RecordTopic, mock.AnythingOfType("[]*message.Message")).
					Return(errors.New("record publish failed")).
					Once()
			},
			wantErr:     true,
			errContains: "record publish failed",
		},
		{
			name:   "nil Record应该失败",
			record: nil,
			setupMock: func(_ *MockPublisher) {
				// nil record不会调用Publish，因为会在之前失败
			},
			wantErr: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			mockPublisher := &MockPublisher{}
			testLogger := logger.NewLogger(logr.Discard())
			privateKey, publicKey := generateTestKeys(t)
			config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
			tt.setupMock(mockPublisher)

			client := highclient.NewClient(mockPublisher, testLogger, config)

			err := client.RecordPublish(tt.record)
			if tt.wantErr {
				require.Error(t, err)
				if tt.errContains != "" {
					assert.Contains(t, err.Error(), tt.errContains)
				}
			} else {
				require.NoError(t, err)
			}

			mockPublisher.AssertExpectations(t)
		})
	}
}

func TestClient_Close(t *testing.T) {
	tests := []struct {
		name        string
		setupMock   func(*MockPublisher)
		wantErr     bool
		errContains string
	}{
		{
			name: "成功关闭",
			setupMock: func(mp *MockPublisher) {
				mp.On("Close").Return(nil).Once()
			},
			wantErr: false,
		},
		{
			name: "关闭失败",
			setupMock: func(mp *MockPublisher) {
				mp.On("Close").Return(errors.New("close failed")).Once()
			},
			wantErr:     true,
			errContains: "close failed",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			mockPublisher := &MockPublisher{}
			testLogger := logger.NewLogger(logr.Discard())
			privateKey, publicKey := generateTestKeys(t)
			config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
			tt.setupMock(mockPublisher)

			client := highclient.NewClient(mockPublisher, testLogger, config)

			err := client.Close()

			if tt.wantErr {
				require.Error(t, err)
				if tt.errContains != "" {
					assert.Contains(t, err.Error(), tt.errContains)
				}
			} else {
				require.NoError(t, err)
			}

			mockPublisher.AssertExpectations(t)
		})
	}
}

func TestClient_MessageContent(t *testing.T) {
	// 测试发布的消息内容是否正确
	t.Run("Operation消息内容验证", func(t *testing.T) { //nolint:dupl // 测试代码中的重复模式是合理的
		mockPublisher := &MockPublisher{}
		testLogger := logger.NewLogger(logr.Discard())
		privateKey, publicKey := generateTestKeys(t)
		config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
		operation := createTestOperation(t)

		// 捕获发布的消息
		var capturedMessages []*message.Message
		mockPublisher.On("Publish", adapter.OperationTopic, mock.AnythingOfType("[]*message.Message")).
			Run(func(args mock.Arguments) {
				messages, ok := args.Get(1).([]*message.Message)
				if ok {
					capturedMessages = messages
				}
			}).Return(nil).Once()

		client := highclient.NewClient(mockPublisher, testLogger, config)
		err := client.OperationPublish(operation)
		require.NoError(t, err)

		// 验证消息内容
		require.Len(t, capturedMessages, 1)
		msg := capturedMessages[0]
		assert.Equal(t, operation.Key(), msg.UUID)
		assert.NotEmpty(t, msg.Payload)

		// 验证是Envelope格式，可以反序列化
		unmarshaledOp, err := model.UnmarshalOperation(msg.Payload)
		require.NoError(t, err)
		assert.Equal(t, operation.OpID, unmarshaledOp.OpID)

		// 验证签名
		verifyConfig := model.NewSM2VerifyConfig(publicKey)
		verifiedEnv, err := model.VerifyEnvelopeWithConfig(msg.Payload, verifyConfig)
		require.NoError(t, err)
		assert.NotNil(t, verifiedEnv)
	})

	t.Run("Record消息内容验证", func(t *testing.T) { //nolint:dupl // 测试代码中的重复模式是合理的
		mockPublisher := &MockPublisher{}
		testLogger := logger.NewLogger(logr.Discard())
		privateKey, publicKey := generateTestKeys(t)
		config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
		record := createTestRecord(t)

		// 捕获发布的消息
		var capturedMessages []*message.Message
		mockPublisher.On("Publish", adapter.RecordTopic, mock.AnythingOfType("[]*message.Message")).
			Run(func(args mock.Arguments) {
				messages, ok := args.Get(1).([]*message.Message)
				if ok {
					capturedMessages = messages
				}
			}).Return(nil).Once()

		client := highclient.NewClient(mockPublisher, testLogger, config)
		err := client.RecordPublish(record)
		require.NoError(t, err)

		// 验证消息内容
		require.Len(t, capturedMessages, 1)
		msg := capturedMessages[0]
		assert.Equal(t, record.Key(), msg.UUID)
		assert.NotEmpty(t, msg.Payload)

		// 验证是Envelope格式，可以反序列化
		unmarshaledRecord, err := model.UnmarshalRecord(msg.Payload)
		require.NoError(t, err)
		assert.Equal(t, record.ID, unmarshaledRecord.ID)

		// 验证签名
		verifyConfig := model.NewSM2VerifyConfig(publicKey)
		verifiedEnv, err := model.VerifyEnvelopeWithConfig(msg.Payload, verifyConfig)
		require.NoError(t, err)
		assert.NotNil(t, verifiedEnv)
	})
}

func TestClient_ConcurrentPublish(t *testing.T) {
	// 测试并发发布
	mockPublisher := &MockPublisher{}
	testLogger := logger.NewLogger(logr.Discard())
	privateKey, publicKey := generateTestKeys(t)
	config := model.NewSM2EnvelopeConfig(privateKey, publicKey)

	// 设置期望的调用次数
	publishCount := 100
	mockPublisher.On("Publish", adapter.OperationTopic, mock.AnythingOfType("[]*message.Message")).
		Return(nil).Times(publishCount)

	client := highclient.NewClient(mockPublisher, testLogger, config)

	// 并发发布
	errChan := make(chan error, publishCount)
	for i := range publishCount {
		go func(id int) {
			//nolint:testifylint // 在goroutine中创建测试数据，使用panic处理错误
			operation := createTestOperationWithID(nil, fmt.Sprintf("concurrent-test-%d", id))
			errChan <- client.OperationPublish(operation)
		}(i)
	}

	// 收集结果
	for range publishCount {
		err := <-errChan
		require.NoError(t, err)
	}

	mockPublisher.AssertExpectations(t)
}

func TestClient_EdgeCases(t *testing.T) {
	t.Run("发布大型Operation", func(t *testing.T) {
		mockPublisher := &MockPublisher{}
		testLogger := logger.NewLogger(logr.Discard())
		privateKey, publicKey := generateTestKeys(t)
		config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
		mockPublisher.On("Publish", adapter.OperationTopic, mock.AnythingOfType("[]*message.Message")).
			Return(nil).
			Once()

		client := highclient.NewClient(mockPublisher, testLogger, config)

		// 创建包含大量数据的Operation
		operation := createTestOperation(t)
		operation.OpActor = string(make([]byte, 1000)) // 1KB数据

		err := client.OperationPublish(operation)
		require.NoError(t, err)

		mockPublisher.AssertExpectations(t)
	})

	t.Run("发布大型Record", func(t *testing.T) {
		mockPublisher := &MockPublisher{}
		testLogger := logger.NewLogger(logr.Discard())
		privateKey, publicKey := generateTestKeys(t)
		config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
		mockPublisher.On("Publish", adapter.RecordTopic, mock.AnythingOfType("[]*message.Message")).Return(nil).Once()

		client := highclient.NewClient(mockPublisher, testLogger, config)

		// 创建包含大量数据的Record
		record := createTestRecord(t)
		record.WithExtra(make([]byte, 500)) // 500字节的额外数据

		err := client.RecordPublish(record)
		require.NoError(t, err)

		mockPublisher.AssertExpectations(t)
	})
}

func TestClient_Integration(t *testing.T) {
	// 集成测试 - 测试完整的工作流程
	mockPublisher := &MockPublisher{}
	testLogger := logger.NewLogger(logr.Discard())
	privateKey, publicKey := generateTestKeys(t)
	config := model.NewSM2EnvelopeConfig(privateKey, publicKey)

	// 设置期望：发布Operation -> 发布Record -> 关闭
	mockPublisher.On("Publish", adapter.OperationTopic, mock.AnythingOfType("[]*message.Message")).Return(nil).Once()
	mockPublisher.On("Publish", adapter.RecordTopic, mock.AnythingOfType("[]*message.Message")).Return(nil).Once()
	mockPublisher.On("Close").Return(nil).Once()

	client := highclient.NewClient(mockPublisher, testLogger, config)

	// 发布Operation
	operation := createTestOperation(t)
	err := client.OperationPublish(operation)
	require.NoError(t, err)

	// 发布Record
	record := createTestRecord(t)
	err = client.RecordPublish(record)
	require.NoError(t, err)

	// 关闭客户端
	err = client.Close()
	require.NoError(t, err)

	mockPublisher.AssertExpectations(t)
}

// 性能基准测试.
func BenchmarkClient_OperationPublish(b *testing.B) {
	mockPublisher := &MockPublisher{}
	testLogger := logger.NewLogger(logr.Discard())
	privateKey, publicKey := generateTestKeys(b)
	config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
	mockPublisher.On("Publish", adapter.OperationTopic, mock.AnythingOfType("[]*message.Message")).Return(nil)

	client := highclient.NewClient(mockPublisher, testLogger, config)
	operation := createTestOperation(b)

	b.ResetTimer()
	for range b.N {
		err := client.OperationPublish(operation)
		if err != nil {
			b.Fatal(err)
		}
	}
}

func BenchmarkClient_RecordPublish(b *testing.B) {
	mockPublisher := &MockPublisher{}
	testLogger := logger.NewLogger(logr.Discard())
	privateKey, publicKey := generateTestKeys(b)
	config := model.NewSM2EnvelopeConfig(privateKey, publicKey)
	mockPublisher.On("Publish", adapter.RecordTopic, mock.AnythingOfType("[]*message.Message")).Return(nil)

	client := highclient.NewClient(mockPublisher, testLogger, config)
	record := createTestRecord(b)

	b.ResetTimer()
	for range b.N {
		err := client.RecordPublish(record)
		if err != nil {
			b.Fatal(err)
		}
	}
}

// 测试辅助函数.
func createTestOperation(t testing.TB) *model.Operation {
	return createTestOperationWithID(t, "test-operation-001")
}

func createTestOperationWithID(t testing.TB, id string) *model.Operation {
	// 在并发测试中，t可能为nil，这是正常的
	errorHandler := func(err error) {
		if t != nil {
			require.NoError(t, err)
		} else if err != nil {
			panic(err)
		}
	}
	operation, err := model.NewFullOperation(
		model.OpSourceDOIP,
		model.OpTypeRetrieve,
		"test-prefix",
		"test-repo",
		"test-prefix/test-repo/test-object",
		"test-producer-id",
		"test-actor",
		"test request body",
		"test response body",
		time.Now(),
	)
	errorHandler(err)
	operation.OpID = id // 设置自定义ID
	return operation
}

func createTestRecord(t testing.TB) *model.Record {
	record, err := model.NewFullRecord(
		"test-prefix",
		"test-producer-id",
		time.Now(),
		"test-operator",
		[]byte("test extra data"),
		"test-type",
	)
	require.NoError(t, err)
	return record
}