using Aliyun.OSS;
using HtmlAgilityPack;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;
using System.Text.Json;
using New_College.Common.Helper;
using System.Threading;
using System.Text.RegularExpressions;
namespace New_College.Tasks
{
    public class NationWideNewsAgHelper
    {

        private string itemUrl = "https://gaokao.chsi.com.cn";
        public async Task<List<NewsModels>> HtmlCreatePageData(string provinceCode)
        {
            var list = new List<NewsModels>();
      
            switch (provinceCode)
            {
                case "310000":
                    list=await ShangHaiNewsList();
                    break;
                case "370000":
                    list= ShanDongNewsList();
                    break;

            }
            return list;
        }


        private async Task<List<NewsModels>> ShangHaiNewsList()
        {
            string BaseUrl = "https://www.shmeea.edu.cn";
           // var web = new HtmlWeb();
            var list = new List<NewsModels>();
            var listUrl = $"{BaseUrl}/page/02200/index.html";
            using var client = new HttpClient();
            var bytes = await client.GetByteArrayAsync(listUrl);
            var html = Encoding.UTF8.GetString(bytes);  // ✅ 关键：手动用 UTF-8 解码

            // ✅ 正确方式：用 HtmlDocument.LoadHtml 解析字符串
            var listDoc = new HtmlDocument();
            listDoc.LoadHtml(html);

            // 核心修改：class 名模糊匹配 + 节点层级简化
            var items = listDoc.DocumentNode.SelectNodes("//ul[contains(@class,'pageList')]/li");
            if (items == null)
            {
                Console.WriteLine("❌ 页面列表未找到，可能被反爬或类名变动！");
                File.WriteAllText("debug.html", listDoc.DocumentNode.OuterHtml); // 调试用
                return list;
            }
            foreach (var li in items)
            {
                try
                {
                    var aTag = li.SelectSingleNode("./a");
                    var span = li.SelectSingleNode("./span[@class='listTime']");

                    var href = aTag.GetAttributeValue("href", "");
                    var fullUrl = href.StartsWith("http") ? href : $"{BaseUrl}{href}";
                    var title = aTag.GetAttributeValue("title", "")?.Trim();
                    var date = span?.InnerText?.Trim();

                    // PDF 直接跳过正文抓取
                    if (href.EndsWith(".pdf", StringComparison.OrdinalIgnoreCase))
                    {
                        list.Add(new NewsModels
                        {
                            title = title,
                            author = "上海市教育考试院",
                            pubtime = Convert.ToDateTime(date),
                            summary = "该条为 PDF 附件，请点击查看。",
                            detail = $"<p><a href=\"{fullUrl}\" target=\"_blank\">点击下载附件</a></p>"
                        });
                        continue;
                    }

                    // ✅ 正确方式：用 HtmlDocument.LoadHtml 解析字符串

                    // 加载详情页：同样用 HttpClient + UTF-8 解码
                    var detailBytes = await client.GetByteArrayAsync(fullUrl);
                    var detailHtml = Encoding.UTF8.GetString(detailBytes);
                    var detailDoc = new HtmlDocument();
                    detailDoc.LoadHtml(detailHtml);
                   
                    var model = new NewsModels
                    {
                        author = "上海市教育考试院",
                        pubtime = DateTime.TryParse(date, out var pubTime) ? pubTime : DateTime.Now
                    };


                    // 标题（剔除 small）
                    var titleNode = detailDoc.DocumentNode.SelectSingleNode("//div[@id='ivs_title']");
                    if (titleNode != null)
                    {
                        var small = titleNode.SelectSingleNode("./small");
                        if (small != null) small.Remove();
                        model.title = titleNode.InnerText.Trim();
                    }

                    // 正文
                    var contentNode = detailDoc.DocumentNode.SelectSingleNode("//div[@id='ivs_content']");
                    model.detail = contentNode?.InnerHtml?.Trim() ?? "";

                   

                    // 附件追加到正文
                    var links = contentNode?.SelectNodes(".//a[@href]");
                    if (links != null)
                    {
                        foreach (var link in links)
                        {
                            var hrefVal = link.GetAttributeValue("href", "");
                            if (Regex.IsMatch(hrefVal, @"\.(pdf|mp4|docx?|xls)$", RegexOptions.IgnoreCase))
                            {
                                var fullLink = hrefVal.StartsWith("http") ? hrefVal : $"{BaseUrl}{hrefVal}";
                                model.detail += $"<p>附件：<a href=\"{fullLink}\" target=\"_blank\">{link.InnerText}</a></p>";
                            }
                        }
                    }

                    // 摘要
                    var plainText = Regex.Replace(model.detail, "<.*?>", "");
                    model.summary = plainText.Length > 120 ? plainText.Substring(0, 120) : plainText;
                    list.Add(model);

                    Thread.Sleep(200); // 防止请求过快被封
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"❌ 抓取失败：{ex.Message}");
                }
            }

            return list;
        }

        private List<NewsModels> ShanDongNewsList()
        {
            string BaseUrl = "https://www.sdzk.cn/";

            var web = new HtmlWeb();
            var listUrl = "https://www.sdzk.cn/NewsList.aspx?BCID=20&CID=1117";
            var doc = web.Load(listUrl);
            var newsList = new List<NewsModels>();
            var listItems = doc.DocumentNode.SelectNodes("//div[@class='blockLine']//ul[@class='bd']/li/a");
            if (listItems == null) return newsList;
            foreach (var item in listItems)
            {
                try
                {
                    // 基础字段
                    var href = item.GetAttributeValue("href", "");
                    var fullUrl = href.StartsWith("http") ? href : $"{BaseUrl}/{href.TrimStart('/')}";
                    var title = item.InnerText?.Trim();

                    // 发布时间解析
                    var dateMatch = Regex.Match(item.InnerHtml, @"<i>(\d{4}-\d{2}-\d{2})<\/i>");
                    var pubtime = dateMatch.Success ? dateMatch.Groups[1].Value : "未知时间";

                    // 加载详情页
                    var detailDoc = web.Load(fullUrl);
                    var contentNode = detailDoc.DocumentNode.SelectSingleNode("//div[@id='UCAP-CONTENT']");
                    var detailHtml = contentNode?.InnerHtml?.Trim() ?? "";

                    // 提取作者
                    var infoSpans = detailDoc.DocumentNode.SelectNodes("//div[@class='MLspan']/span");
                    string author = "未知作者";
                    if (infoSpans != null)
                    {
                        foreach (var span in infoSpans)
                        {
                            var text = span.InnerText.Trim();
                            if (text.StartsWith("作者："))
                            {
                                author = text.Replace("作者：", "").Trim();
                                break;
                            }
                        }
                    }
                    // 封面图
                    string coverImg = "";
                    var firstImg = contentNode?.SelectSingleNode(".//img");
                    if (firstImg != null)
                    {
                        var src = firstImg.GetAttributeValue("src", "");
                        if (!string.IsNullOrEmpty(src))
                        {
                            coverImg = src.StartsWith("http") ? src : $"{BaseUrl}{src}";
                        }
                    }
                    // 摘要
                    var plainText = Regex.Replace(detailHtml, "<.*?>", "");
                    var summary = plainText.Length > 120 ? plainText.Substring(0, 120) : plainText;

                    newsList.Add(new NewsModels
                    {
                        title = title,
                        author = author,
                        summary = summary,
                        detail = detailHtml,
                        pubtime = DateTime.Parse(pubtime)
                    });

                    Thread.Sleep(200); // 限速
                }
                catch (Exception ex)
                {
                    Console.WriteLine($"处理失败：{ex.Message}");
                }
            }

            return newsList;

        }

    }
}

public class GaokaoObject
{
    public List<Msg> msg { get; set; }
    public bool flag { get; set; }
}

public class Msg
{
    public string title { get; set; }
    public string truncTitle { get; set; }
    public string uri { get; set; }
    public string displayDate { get; set; }
}