package codec

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"
)

func TestMessagePackCodec(t *testing.T) {
	codec := NewMessagePackCodec()

	// 测试名称
	assert.Equal(t, "msgpack", codec.Name(), "Expected name to be 'msgpack'")

	// 测试编码
	type TestStruct struct {
		Name  string `json:"name"`
		Value int    `json:"value"`
	}

	data := TestStruct{
		Name:  "test",
		Value: 42,
	}

	encoded, err := codec.Encode(data)
	require.NoError(t, err, "Expected no error when encoding")
	assert.NotEmpty(t, encoded, "Expected encoded data to be non-empty")

	// 测试解码
	var decoded TestStruct
	err = codec.Decode(encoded, &decoded)
	require.NoError(t, err, "Expected no error when decoding")
	assert.Equal(t, data.Name, decoded.Name, "Expected name to match")
	assert.Equal(t, data.Value, decoded.Value, "Expected value to match")
}

func TestMessagePackCodecPrimitives(t *testing.T) {
	codec := NewMessagePackCodec()

	// 测试编码字符串
	encoded, err := codec.Encode("hello")
	require.NoError(t, err)
	assert.NotEmpty(t, encoded)

	var str string
	err = codec.Decode(encoded, &str)
	require.NoError(t, err)
	assert.Equal(t, "hello", str)
}

func TestMessagePackCodecInvalidData(t *testing.T) {
	codec := NewMessagePackCodec()

	// 测试无效数据（虽然msgpack使用JSON作为fallback，但仍需测试）
	var result interface{}
	err := codec.Decode([]byte("invalid"), &result)
	// 由于使用JSON fallback，可能会成功或失败，这里只测试不会panic
	_ = err
}