package common

import (
	"bytes"
	"compress/zlib"
	"crypto/tls"
	"encoding/json"
	"fmt"
	"io"
	"net/http"
	"os"
	"strings"
	"time"
)

// HTTPClient HTTP客户端
type HTTPClient struct {
	client *http.Client
	logger *Logger
}

// NewHTTPClient 创建新的HTTP客户端
func NewHTTPClient() *HTTPClient {
	return &HTTPClient{
		client: &http.Client{
			Timeout: 30 * time.Second,
		},
		logger: NewLogger("http_utils", "INFO", ""),
	}
}

// ClientResponse 客户端响应
type ClientResponse struct {
	Status  int
	Content []byte
	Headers http.Header
	Cookies []*http.Cookie
	Text    string
}

// GetHeader 获取响应头（兼容方法）
func (r *ClientResponse) GetHeader(key string) string {
	return r.Headers.Get(key)
}

// JSON 解析JSON响应
func (r *ClientResponse) JSON() (map[string]interface{}, error) {
	var result map[string]interface{}
	err := json.Unmarshal(r.Content, &result)
	return result, err
}

// Request HTTP请求
func (h *HTTPClient) Request(url string, options map[string]interface{}) (*ClientResponse, error) {
	// 获取请求方法
	method := "GET"
	if m, ok := options["method"].(string); ok {
		method = strings.ToUpper(m)
	}

	// 获取请求头
	headers := make(map[string]string)
	if h, ok := options["headers"].(map[string]string); ok {
		headers = h
	}

	// 设置默认User-Agent
	if _, ok := headers["User-Agent"]; !ok {
		headers["User-Agent"] = "okhttp/4.12.0"
	}

	// 获取请求体
	var body io.Reader
	if method == "POST" || method == "PUT" {
		if b, ok := options["body"].(string); ok {
			body = strings.NewReader(b)
		} else if b, ok := options["body"].([]byte); ok {
			body = bytes.NewReader(b)
		} else if data, ok := options["data"].(string); ok {
			body = strings.NewReader(data)
		} else if data, ok := options["data"].([]byte); ok {
			body = bytes.NewReader(data)
		}
	}

	// 创建请求
	req, err := http.NewRequest(method, url, body)
	if err != nil {
		h.logger.Error(fmt.Sprintf("Failed to create request: %v", err))
		return nil, err
	}

	// 设置请求头
	for k, v := range headers {
		req.Header.Set(k, v)
	}

	// 打印请求信息
	// h.logger.Info(fmt.Sprintf("=== HTTP 请求 ==="))
	// h.logger.Info(fmt.Sprintf("方法: %s", method))
	// h.logger.Info(fmt.Sprintf("URL: %s", url))
	// h.logger.Info(fmt.Sprintf("请求头:"))
	// for k, v := range req.Header {
	// 	h.logger.Info(fmt.Sprintf("  %s: %s", k, strings.Join(v, ", ")))
	// }
	
	// 检查是否跳过SSL验证
	skipSSL := os.Getenv("FQWEB_SKIP_SSL_VERIFY")
	if skipSSL != "" && h.client.Transport == nil {
		// 配置跳过SSL验证
		transport := &http.Transport{
			TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
		}
		h.client.Transport = transport
		h.logger.Warning("已启用SSL验证跳过模式")
	}

	// 发送请求
	resp, err := h.client.Do(req)
	if err != nil {
		h.logger.Error(fmt.Sprintf("HTTP Request error: %v", err))
		return nil, err
	}
	defer resp.Body.Close()

	// 读取响应体
	content, err := io.ReadAll(resp.Body)
	if err != nil {
		h.logger.Error(fmt.Sprintf("Failed to read response: %v", err))
		return nil, err
	}

	// 处理zlib压缩
	if len(content) > 2 && (content[0] == 0x78 && (content[1] == 0x9C || content[1] == 0x01)) {
		reader, err := zlib.NewReader(bytes.NewReader(content))
		if err == nil {
			decompressed, err := io.ReadAll(reader)
			reader.Close()
			if err == nil {
				content = decompressed
			}
		}
	}


	response := &ClientResponse{
		Status:  resp.StatusCode,
		Content: content,
		Headers: resp.Header,
		Cookies: resp.Cookies(),
		Text:    string(content),
	}

	return response, nil
}

// Get GET请求
func (h *HTTPClient) Get(url string, headers map[string]string) (*ClientResponse, error) {
	options := map[string]interface{}{
		"method":  "GET",
		"headers": headers,
	}
	return h.Request(url, options)
}

// Post POST请求
func (h *HTTPClient) Post(url string, data interface{}, headers map[string]string) (*ClientResponse, error) {
	options := map[string]interface{}{
		"method":  "POST",
		"headers": headers,
		"body":    data,
	}
	return h.Request(url, options)
}

// ConvertDictToFormString 将字典转换为表单字符串
func ConvertDictToFormString(dict map[string]string) string {
	parts := make([]string, 0, len(dict))
	for k, v := range dict {
		parts = append(parts, fmt.Sprintf("%s=%s", k, v))
	}
	return strings.Join(parts, "&")
}

// DefaultHTTPClient 默认HTTP客户端
var DefaultHTTPClient = NewHTTPClient()

// Request 全局请求函数
func Request(url string, options map[string]interface{}) (*ClientResponse, error) {
	return DefaultHTTPClient.Request(url, options)
}