package sync

import (
	"bytes"
	"context"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"time"
)

type HttpClient struct {
	BaseURL    string
	Timeout    time.Duration
	HTTPClient *http.Client
}

func NewHttpClient(baseURL string, timeout time.Duration) *HttpClient {
	if timeout == 0 {
		timeout = 30 * time.Second
	}
	return &HttpClient{
		BaseURL: baseURL,
		Timeout: timeout,
		HTTPClient: &http.Client{
			Timeout: timeout,
		},
	}
}

func (c *HttpClient) Post(ctx context.Context, url string, body interface{}) ([]byte, error) {
	jsonData, err := json.Marshal(body)
	if err != nil {
		return nil, fmt.Errorf("序列化请求失败：%w", err)
	}

	fullURL := url
	if c.BaseURL != "" && len(url) > 0 && url[0] != '/' {
		fullURL = c.BaseURL + url
	} else if c.BaseURL != "" {
		fullURL = c.BaseURL + url
	}

	req, err := http.NewRequestWithContext(ctx, "POST", fullURL, bytes.NewBuffer(jsonData))
	if err != nil {
		return nil, fmt.Errorf("创建请求失败：%w", err)
	}

	req.Header.Set("Content-Type", "application/json")

	resp, err := c.HTTPClient.Do(req)
	if err != nil {
		return nil, fmt.Errorf("请求失败：%w", err)
	}
	defer resp.Body.Close()

	respBody, err := io.ReadAll(resp.Body)
	if err != nil {
		return nil, fmt.Errorf("读取响应失败：%w", err)
	}

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("HTTP 错误状态码：%d", resp.StatusCode)
	}

	return respBody, nil
}