package request

import (
	"context"
	"testing"

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

func TestRequest(t *testing.T) {
	raw := []byte("test data")
	req := New(raw, nil)

	// 测试Raw
	assert.Equal(t, raw, req.Raw(), "Expected raw data to match")
}

func TestRequestBody(t *testing.T) {
	req := New([]byte("test"), nil).(*requestImpl)

	// 测试Data（初始为nil）
	assert.Nil(t, req.Data(), "Expected data to be nil initially")

	// 设置Data
	req.SetData("test data")
	assert.Equal(t, "test data", req.Data(), "Expected data to be set")
}

func TestRequestBind(t *testing.T) {
	type TestStruct struct {
		Name  string `json:"name"`
		Value int    `json:"value"`
	}

	// 创建测试数据
	data := TestStruct{
		Name:  "test",
		Value: 42,
	}

	req := New([]byte("test"), nil).(*requestImpl)
	// 设置Data以便Bind可以工作
	req.SetData(data)

	// 测试Bind
	var result TestStruct
	err := req.Bind(&result)
	require.NoError(t, err, "Expected no error when binding")
	assert.Equal(t, data.Name, result.Name, "Expected name to match")
	assert.Equal(t, data.Value, result.Value, "Expected value to match")
}

func TestRequestBindNoData(t *testing.T) {
	req := New([]byte("test"), nil)

	// 测试Bind without data
	var result struct {
		Name string `json:"name"`
	}
	err := req.Bind(&result)
	assert.Error(t, err, "Expected error when no data available")
}

func TestRequestBindWithBody(t *testing.T) {
	type TestStruct struct {
		Name  string `json:"name"`
		Value int    `json:"value"`
	}

	req := New([]byte("{}"), nil).(*requestImpl)

	// 设置Data
	data := TestStruct{
		Name:  "test",
		Value: 42,
	}
	req.SetData(data)

	// 测试Bind（应该使用Data）
	var result TestStruct
	err := req.Bind(&result)
	require.NoError(t, err, "Expected no error when binding")
	assert.Equal(t, data.Name, result.Name, "Expected name to match")
	assert.Equal(t, data.Value, result.Value, "Expected value to match")
}

func TestRequestHeader(t *testing.T) {
	req := New([]byte("test"), nil)

	// 测试Header（初始可能为nil）
	header := req.Header()
	// Header可能为nil，这是正常的（无帧头协议）
	if header != nil {
		// 如果header存在，测试Get方法
		_ = header.Get("test")
	}
}

func TestRequestBodyBytes(t *testing.T) {
	req := New([]byte("test"), nil).(*requestImpl)

	// 测试DataBytes（初始为空）
	dataBytes := req.DataBytes()
	assert.Nil(t, dataBytes, "Expected dataBytes to be nil initially")

	// 设置DataBytes
	testData := []byte("test data bytes")
	req.SetDataBytes(testData)
	assert.Equal(t, testData, req.DataBytes(), "Expected dataBytes to match")
}

func TestRequestProtocolVersion(t *testing.T) {
	mockProtocol := &mockProtocol{}
	req := New([]byte("test"), mockProtocol)

	// 测试ProtocolVersion
	version := req.ProtocolVersion()
	assert.Equal(t, "1.0", version, "Expected version to match")

	// 测试nil protocol
	req2 := New([]byte("test"), nil)
	version2 := req2.ProtocolVersion()
	assert.Equal(t, "", version2, "Expected empty version for nil protocol")
}

func TestRequestSetHeader(t *testing.T) {
	req := New([]byte("test"), nil).(*requestImpl)

	// 设置Header
	newHeader := NewFrameHeader()
	newHeader.Set("message_id", uint64(123))
	newHeader.Set("type", "request")
	req.SetHeader(newHeader)

	// 验证Header
	header := req.Header()
	assert.NotNil(t, header, "Expected header to be non-nil")
	assert.Equal(t, uint64(123), header.Get("message_id"), "Expected message ID to match")
	assert.Equal(t, "request", header.Get("type"), "Expected type to match")
}

func TestRequestProtocol(t *testing.T) {
	mockProtocol := &mockProtocol{}
	req := New([]byte("test"), mockProtocol).(*requestImpl)

	// 测试Protocol
	assert.Equal(t, mockProtocol, req.Protocol(), "Expected protocol to match")
}

// mockProtocol 模拟协议
type mockProtocol struct{}

func (m *mockProtocol) Name() string {
	return "test"
}

func (m *mockProtocol) Version() string {
	return "1.0"
}

func (m *mockProtocol) HasHeader() bool {
	return false
}

func (m *mockProtocol) Encode(data []byte, header protocol.FrameHeader) ([]byte, error) {
	return data, nil
}

func (m *mockProtocol) Decode(data []byte) (protocol.FrameHeader, []byte, error) {
	return nil, data, nil
}

func (m *mockProtocol) Handle(ctx context.Context, data []byte) ([]byte, error) {
	return data, nil
}

func (m *mockProtocol) Unpacker() unpackerpkg.Unpacker {
	return nil
}