// utils/http_client.go
package utils

import (
	"bytes"
	"context"
	"crypto/tls"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"net/url"
	"strings"
	"time"
)

// 扩展 HTTPClient 接口
type HTTPClient interface {
	RequestJSON(ctx context.Context, method string, reqURL string, body interface{}) ([]byte, error)
	RequestWithProxy(ctx context.Context, method string, reqURL string, body interface{}, proxyURL string) ([]byte, error)
}

// 修改 httpClient 结构体
type httpClient struct {
	client        *http.Client
	defaultProxy  string // 新增默认代理配置
	skipSSLVerify bool
}

func NewHttpClient(timeout time.Duration, isSkipSSLVerify bool, defaultProxy string) HTTPClient {
	baseTransport := &http.Transport{
		TLSClientConfig: &tls.Config{
			InsecureSkipVerify: isSkipSSLVerify,
		},
		MaxIdleConns:       100,
		IdleConnTimeout:    90 * time.Second,
		DisableCompression: true,
	}

	return &httpClient{
		client: &http.Client{
			Timeout:   timeout,
			Transport: baseTransport,
		},
		defaultProxy:  defaultProxy,
		skipSSLVerify: isSkipSSLVerify,
	}
}

// 改进后的带代理请求方法
func (c *httpClient) RequestWithProxy(ctx context.Context, method string, reqURL string, body interface{}, proxyURL string) ([]byte, error) {
	// 自动补充协议前缀（支持多种代理协议）
	if !strings.Contains(proxyURL, "://") {
		proxyURL = "http://" + proxyURL
		fmt.Printf("自动补充HTTP协议前缀: %s\n", proxyURL)
	}

	// 校验并解析代理URL
	parsedProxy, err := url.Parse(proxyURL)
	if err != nil {
		return nil, fmt.Errorf("代理地址格式错误（需要包含协议，示例：socks5://127.0.0.1:1080 或 http://proxy.com）: %w", err)
	}

	// 配置代理传输
	proxyTransport := c.client.Transport.(*http.Transport).Clone()
	proxyTransport.Proxy = http.ProxyURL(parsedProxy)

	// 添加Transport配置验证
	if proxyTransport.Proxy == nil {
		return nil, fmt.Errorf("代理配置未正确应用到Transport")
	}

	// 创建带缓存的客户端
	proxyClient := &http.Client{
		Transport: proxyTransport,
		Timeout:   c.client.Timeout,
	}

	// 执行请求并处理错误
	respData, err := c.doRequest(ctx, proxyClient, method, reqURL, body)
	if err != nil {
		return nil, fmt.Errorf("代理请求失败(%s): %w", proxyURL, err)
	}
	return respData, nil
}

// 修改方法签名
func (c *httpClient) RequestJSON(ctx context.Context, method string, reqURL string, body interface{}) ([]byte, error) {
	return c.doRequest(ctx, c.client, method, reqURL, body)
}

// 重命名并修改doPostRequest
func (c *httpClient) doRequest(ctx context.Context, client *http.Client, method string, reqURL string, body interface{}) ([]byte, error) {
	var reqBody []byte
	if body != nil && method != "GET" {
		var err error
		if byteBody, ok := body.([]byte); ok {
			reqBody = byteBody
		} else {
			if reqBody, err = json.Marshal(body); err != nil {
				return nil, fmt.Errorf("JSON序列化失败: %w", err)
			}
		}
	}

	if method == "GET" && body != nil {
		if params, ok := body.(map[string]string); ok {
			query := url.Values{}
			for k, v := range params {
				query.Add(k, v)
			}
			reqURL = fmt.Sprintf("%s?%s", reqURL, query.Encode())
		}
	}

	req, err := http.NewRequestWithContext(ctx, method, reqURL, bytes.NewReader(reqBody))
	if err != nil {
		return nil, fmt.Errorf("创建请求失败: %w", err)
	}

	req.Header.Set("Content-Type", "application/json; charset=utf-8")
	req.Header.Set("Accept", "application/json")
	// 原有脱敏日志
	// Logger.Printf("[HTTP请求] %s %s\nHeaders: %+v\nBody: %.100s",
	// 	method,
	// 	strings.ReplaceAll(reqURL, "access_token=[^\"]*", "access_token=***"),
	// 	req.Header,
	// 	string(reqBody))

	resp, err := client.Do(req)
	if resp != nil {
		// 记录响应日志（脱敏处理）
		bodyBytes, _ := io.ReadAll(resp.Body)
		resp.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
		// Logger.Printf("[HTTP响应] Status: %d\nHeaders: %+v\nBody: %.200s",
		// 	resp.StatusCode,
		// 	resp.Header,
		// 	string(bodyBytes))
	}
	if err != nil {
		return nil, fmt.Errorf("网络请求失败: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
		Logger.WithField("status", resp.StatusCode).Warn("非成功状态码")
		return nil, fmt.Errorf("非成功状态码: %d", resp.StatusCode)
	}

	return io.ReadAll(resp.Body)
}