package httpHelper

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"net/http"

	"github.com/pkg/errors"
)

// HTTPClientHelper 提供了对HTTP API调用的基本封装
type HTTPClientHelper struct {
	client *http.Client
}

// NewHTTPClientHelper 创建一个新的HTTPClientHelper实例，并使用默认的http.Client
func NewHTTPClientHelper() *HTTPClientHelper {
	return &HTTPClientHelper{
		client: &http.Client{},
	}
}

// Get 发起一个GET请求并返回响应体
func (h *HTTPClientHelper) Get(url string) ([]byte, error) {
	resp, err := h.client.Get(url)
	if err != nil {
		return nil, errors.Wrap(err, "发起GET请求时出错")
	}
	defer func(Body io.ReadCloser) {
		_ = Body.Close()
	}(resp.Body)

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, errors.Wrap(err, "读取响应体时出错")
	}

	if resp.StatusCode >= 400 {
		return nil, fmt.Errorf("收到非成功状态码: %d", resp.StatusCode)
	}

	return body, nil
}

// PostJSON 发起一个POST请求，发送JSON格式的数据，并返回响应体
func (h *HTTPClientHelper) PostJSON(url string, payload interface{}) ([]byte, error) {
	jsonPayload, err := json.Marshal(payload)
	if err != nil {
		return nil, errors.Wrap(err, "序列化JSON数据时出错")
	}

	req, err := http.NewRequest(http.MethodPost, url, bytes.NewBuffer(jsonPayload))
	if err != nil {
		return nil, errors.Wrap(err, "创建POST请求时出错")
	}
	req.Header.Set("Content-Type", "application/json")

	resp, err := h.client.Do(req)
	if err != nil {
		return nil, errors.Wrap(err, "执行POST请求时出错")
	}
	defer func(Body io.ReadCloser) {
		_ = Body.Close()
	}(resp.Body)

	body, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, errors.Wrap(err, "读取POST响应体时出错")
	}

	if resp.StatusCode >= 400 {
		return nil, fmt.Errorf("收到非成功状态码: %d", resp.StatusCode)
	}

	return body, nil
}