package com.ruoyi.common.utils.http;

import java.io.*;
import java.net.*;
import java.nio.charset.StandardCharsets;
import java.security.cert.X509Certificate;
import java.util.Map;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLContext;
import javax.net.ssl.SSLSession;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ruoyi.common.constant.Constants;
import com.ruoyi.common.utils.StringUtils;
import org.springframework.http.MediaType;

/**
 * 通用http发送方法
 * 
 * @author ruoyi
 */
public class HttpUtils
{
    private static final Logger log = LoggerFactory.getLogger(HttpUtils.class);

    public static final int DEFAULT_READ_TIMEOUT = 60000;
    private static final String BOUNDARY_PREFIX = "----WebKitFormBoundary";
    private static final String LINE_END = "\r\n";
    private static final String TWO_HYPHENS = "--";


    /**
     * 生成唯一的boundary
     */
    private static String generateBoundary() {
        return BOUNDARY_PREFIX + System.currentTimeMillis();
    }

    /**
     * 根据文件名获取Content-Type
     */
    private static String getContentType(String fileName) {
        if (fileName == null) {
            return "application/octet-stream";
        }

        String extension = fileName.toLowerCase();
        if (extension.endsWith(".jpg") || extension.endsWith(".jpeg")) {
            return "image/jpeg";
        } else if (extension.endsWith(".png")) {
            return "image/png";
        } else if (extension.endsWith(".gif")) {
            return "image/gif";
        } else if (extension.endsWith(".pdf")) {
            return "application/pdf";
        } else if (extension.endsWith(".doc")) {
            return "application/msword";
        } else if (extension.endsWith(".docx")) {
            return "application/vnd.openxmlformats-officedocument.wordprocessingml.document";
        } else {
            return "application/octet-stream";
        }
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url)
    {
        return sendGet(url, StringUtils.EMPTY);
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param)
    {
        return sendGet(url, param, Constants.UTF8);
    }

    /**
     * 向指定 URL 发送GET方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @param contentType 编码类型
     * @return 所代表远程资源的响应结果
     */
    public static String sendGet(String url, String param, String contentType)
    {
        StringBuilder result = new StringBuilder();
        BufferedReader in = null;
        try
        {
            String urlNameString = StringUtils.isNotBlank(param) ? url + "?" + param : url;
            log.info("sendGet - {}", urlNameString);
            URL realUrl = new URL(urlNameString);
            URLConnection connection = realUrl.openConnection();
            connection.setRequestProperty("accept", "*/*");
            connection.setRequestProperty("connection", "Keep-Alive");
            connection.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64)");
            connection.connect();
            in = new BufferedReader(new InputStreamReader(connection.getInputStream(), contentType));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendGet ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendGet SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendGet IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendGet Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (in != null)
                {
                    in.close();
                }
            }
            catch (Exception ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    /**
     * 向指定 URL 发送POST方法的请求
     *
     * @param url 发送请求的 URL
     * @param param 请求参数，请求参数应该是 name1=value1&name2=value2 的形式。
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param)
    {
        return sendPost(url, param, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
    }

    /**
     * 向指定 URL 发送POST方法的请求
     * 
     * @param url 发送请求的 URL
     * @param param 请求参数
     * @param contentType 内容类型
     * @return 所代表远程资源的响应结果
     */
    public static String sendPost(String url, String param, String contentType)
    {
        PrintWriter out = null;
        BufferedReader in = null;
        StringBuilder result = new StringBuilder();
        try
        {
            log.info("sendPost - {}", url);
            URL realUrl = new URL(url);
            URLConnection conn = realUrl.openConnection();

            //设置连接超时时间
//            conn.setConnectTimeout(DEFAULT_READ_TIMEOUT);
//            //设置读取超时时间
//            conn.setReadTimeout(DEFAULT_READ_TIMEOUT);

            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("Content-Type", contentType);
            conn.setDoOutput(true);
            conn.setDoInput(true);
            out = new PrintWriter(conn.getOutputStream());
            out.print(param);
            out.flush();
            in = new BufferedReader(new InputStreamReader(conn.getInputStream(), StandardCharsets.UTF_8));
            String line;
            while ((line = in.readLine()) != null)
            {
                result.append(line);
            }
            log.info("recv - {}", result);
        }
        catch (ConnectException e)
        {
            log.error("调用HttpUtils.sendPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
            log.error("调用HttpUtils.sendPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
            log.error("调用HttpUtils.sendPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {
            log.error("调用HttpsUtil.sendPost Exception, url=" + url + ",param=" + param, e);
        }
        finally
        {
            try
            {
                if (out != null)
                {
                    out.close();
                }
                if (in != null)
                {
                    in.close();
                }
            }
            catch (IOException ex)
            {
                log.error("调用in.close Exception, url=" + url + ",param=" + param, ex);
            }
        }
        return result.toString();
    }

    public static String sendSSLPost(String url, String param)
    {
        return sendSSLPost(url, param, MediaType.APPLICATION_FORM_URLENCODED_VALUE);
    }

    public static String sendSSLPost(String url, String param, String contentType)
    {
        StringBuilder result = new StringBuilder();
        String urlNameString = url + "?" + param;
        try
        {
//            log.info("sendSSLPost - {}", urlNameString);
            SSLContext sc = SSLContext.getInstance("SSL");
            sc.init(null, new TrustManager[] { new TrustAnyTrustManager() }, new java.security.SecureRandom());
            URL console = new URL(urlNameString);
            HttpsURLConnection conn = (HttpsURLConnection) console.openConnection();
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");
            conn.setRequestProperty("user-agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64)");
            conn.setRequestProperty("Accept-Charset", "utf-8");
            conn.setRequestProperty("Content-Type", contentType);
            conn.setDoOutput(true);
            conn.setDoInput(true);

            conn.setSSLSocketFactory(sc.getSocketFactory());
            conn.setHostnameVerifier(new TrustAnyHostnameVerifier());
            conn.connect();
            InputStream is = conn.getInputStream();
            BufferedReader br = new BufferedReader(new InputStreamReader(is));
            String ret = "";
            while ((ret = br.readLine()) != null)
            {
                if (ret != null && !"".equals(ret.trim()))
                {
                    result.append(new String(ret.getBytes(StandardCharsets.ISO_8859_1), StandardCharsets.UTF_8));
                }
            }
//            log.info("recv - {}", result);
            conn.disconnect();
            br.close();
        }
        catch (ConnectException e)
        {
//            log.error("调用HttpUtils.sendSSLPost ConnectException, url=" + url + ",param=" + param, e);
        }
        catch (SocketTimeoutException e)
        {
//            log.error("调用HttpUtils.sendSSLPost SocketTimeoutException, url=" + url + ",param=" + param, e);
        }
        catch (IOException e)
        {
//            log.error("调用HttpUtils.sendSSLPost IOException, url=" + url + ",param=" + param, e);
        }
        catch (Exception e)
        {

//            log.error("调用HttpsUtil.sendSSLPost Exception, url=" + url + ",param=" + param, e);
        }
        return result.toString();
    }

    private static class TrustAnyTrustManager implements X509TrustManager
    {
        @Override
        public void checkClientTrusted(X509Certificate[] chain, String authType)
        {
        }

        @Override
        public void checkServerTrusted(X509Certificate[] chain, String authType)
        {
        }

        @Override
        public X509Certificate[] getAcceptedIssuers()
        {
            return new X509Certificate[] {};
        }
    }

    private static class TrustAnyHostnameVerifier implements HostnameVerifier
    {
        @Override
        public boolean verify(String hostname, SSLSession session)
        {
            return true;
        }
    }

    /**
     * 发送文件上传请求
     *
     * @param url 请求URL
     * @param params 请求参数（包含文件流）
     * @return 响应内容
     */
    public static String postFile(String url, Map<String, Object> params) {
        return postFile(url, params, null);
    }

    /**
     * 发送文件上传请求（支持自定义文件名）
     * 支持HTTP和HTTPS，HTTPS会自动忽略SSL证书验证
     *
     * @param url 请求URL
     * @param params 请求参数（包含文件流）
     * @param fileName 文件名（可选，如果为null则使用参数键名）
     * @return 响应内容
     */
    public static String postFile(String url, Map<String, Object> params, String fileName) {
        HttpURLConnection connection = null;
        try {
            // 生成唯一的boundary
            String boundary = generateBoundary();

            log.info("开始文件上传 - URL: {}, fileName: {}, boundary: {}", url, fileName, boundary);
            log.info("参数数量: {}", params.size());
            for (Map.Entry<String, Object> entry : params.entrySet()) {
                log.info("参数: {} = {}", entry.getKey(), entry.getValue() instanceof InputStream ? "InputStream" : entry.getValue());
            }

            // 创建连接
            URL requestUrl = new URL(url);
            connection = (HttpURLConnection) requestUrl.openConnection();
            
            // 如果是HTTPS请求，配置SSL信任所有证书
            if (connection instanceof HttpsURLConnection) {
                HttpsURLConnection httpsConnection = (HttpsURLConnection) connection;
                SSLContext sc = SSLContext.getInstance("TLS");
                sc.init(null, new TrustManager[] { new TrustAnyTrustManager() }, new java.security.SecureRandom());
                httpsConnection.setSSLSocketFactory(sc.getSocketFactory());
                httpsConnection.setHostnameVerifier(new TrustAnyHostnameVerifier());
                log.info("配置HTTPS连接，忽略SSL证书验证");
            }

            
            // 设置请求属性
            connection.setRequestMethod("POST");
            connection.setDoOutput(true);
            connection.setDoInput(true);
            connection.setUseCaches(false);
            connection.setRequestProperty("Content-Type", "multipart/form-data; boundary=" + boundary);
            connection.setRequestProperty("Accept", "application/json");
            connection.setRequestProperty("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36");
            connection.setRequestProperty("Connection", "Keep-Alive");
            connection.setRequestProperty("Accept-Charset", "utf-8");
            connection.setConnectTimeout(30000);
            connection.setReadTimeout(60000);

            // 构建请求体
            try (OutputStream outputStream = connection.getOutputStream();
                 PrintWriter writer = new PrintWriter(new OutputStreamWriter(outputStream, StandardCharsets.UTF_8), true)) {

                // 写入普通参数
                for (Map.Entry<String, Object> entry : params.entrySet()) {
                    Object value = entry.getValue();
                    if (!(value instanceof InputStream)) {
                        writer.append(TWO_HYPHENS).append(boundary).append(LINE_END);
                        writer.append("Content-Disposition: form-data; name=\"").append(entry.getKey()).append("\"").append(LINE_END);
                        writer.append("Content-Type: text/plain; charset=UTF-8").append(LINE_END);
                        writer.append(LINE_END);
                        writer.append(value.toString()).append(LINE_END);
                        writer.flush();
                    }
                }

                // 写入文件参数
                for (Map.Entry<String, Object> entry : params.entrySet()) {
                    Object value = entry.getValue();
                    if (value instanceof InputStream) {
                        // 确定文件名
                        String actualFileName = fileName != null ? fileName : entry.getKey();

                        writer.append(TWO_HYPHENS).append(boundary).append(LINE_END);
                        writer.append("Content-Disposition: form-data; name=\"").append(entry.getKey()).append("\"; filename=\"").append(actualFileName).append("\"").append(LINE_END);
                        writer.append("Content-Type: ").append(getContentType(actualFileName)).append(LINE_END);
                        writer.append(LINE_END);
                        writer.flush();

                        // 写入文件内容
                        try (InputStream inputStream = (InputStream) value) {
                            byte[] buffer = new byte[4096];
                            int bytesRead;
                            while ((bytesRead = inputStream.read(buffer)) != -1) {
                                outputStream.write(buffer, 0, bytesRead);
                            }
                            outputStream.flush();
                        }

                        writer.append(LINE_END);
                        writer.flush();
                    }
                }

                // 写入结束标记
                writer.append(TWO_HYPHENS).append(boundary).append(TWO_HYPHENS).append(LINE_END);
                writer.flush();
            }

            // 获取响应
            int responseCode = connection.getResponseCode();
            log.info("文件上传响应码：{}", responseCode);

            // 读取响应内容
            StringBuilder response = new StringBuilder();
            try (BufferedReader reader = new BufferedReader(
                    new InputStreamReader(
                            responseCode == HttpURLConnection.HTTP_OK ?
                                    connection.getInputStream() :
                                    connection.getErrorStream(),
                            StandardCharsets.UTF_8))) {
                String line;
                while ((line = reader.readLine()) != null) {
                    response.append(line);
                }
            }

            if (responseCode != HttpURLConnection.HTTP_OK) {
                log.error("文件上传失败，响应码：{}，响应内容：{}", responseCode, response.toString());
                throw new RuntimeException("文件上传失败，响应码: " + responseCode + "，响应内容: " + response.toString());
            }

            log.info("文件上传成功，响应：{}", response.toString());
            return response.toString();

        } catch (Exception e) {
            log.error("文件上传异常：{}", e.getMessage(), e);
            throw new RuntimeException("文件上传失败: " + e.getMessage(), e);
        } finally {
            if (connection != null) {
                connection.disconnect();
            }
        }
    }
}