using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Text.RegularExpressions;

namespace RainOpsMini.Helpers
{
    /// <summary>
    /// Steam爬虫助手类
    /// </summary>
    public static class SteamCrawlerHelper
    {
        /// <summary>
        /// 通过HTML解析查询Squad游戏时长和玩家昵称
        /// </summary>
        /// <param name="steamid">玩家SteamID</param>
        /// <returns>包含游戏时长（小时）和昵称的元组</returns>
        public static (int Hours, string Nickname) GetHtmlSquadRunTime(string steamid)
        {
            try
            {
                string url = "https://steamcommunity.com/profiles/" + steamid + "/";
                string htmlContent = "";
                using (WebClient myWebClient = new WebClient())
                {
                    // 添加User-Agent
                    myWebClient.Headers.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36");
                    myWebClient.Encoding = System.Text.Encoding.UTF8;
                    htmlContent = myWebClient.DownloadString(url);
                }

                if (string.IsNullOrEmpty(htmlContent))
                    return (0, "");

                string nickname = "";
                // 1. 获取昵称 <title>Steam Community :: Nickname</title>
                var titleMatch = Regex.Match(htmlContent, @"<title>Steam Community :: (.*?)</title>", RegexOptions.IgnoreCase);
                if (titleMatch.Success)
                {
                    nickname = titleMatch.Groups[1].Value.Trim();
                }

                // 2. 解析游戏时长
                var result = new Dictionary<string, double>();
                string pattern = @"<div\s+class=""game_name""><a[^>]*href=""https://steamcommunity\.com/app/(\d+)"">(.*?)</a></div>.*?<div\s+class=""game_info_details"">[^<]*总时数\s*([\d,]+)\s*小时";
                string patternEn = @"<div\s+class=""game_name""><a[^>]*href=""https://steamcommunity\.com/app/(\d+)"">(.*?)</a></div>.*?<div\s+class=""game_info_details"">[^<]*([\d,]+)\s+hrs";

                var matches = Regex.Matches(htmlContent, pattern, RegexOptions.Singleline | RegexOptions.IgnoreCase);

                if (matches.Count == 0)
                {
                    matches = Regex.Matches(htmlContent, patternEn, RegexOptions.Singleline | RegexOptions.IgnoreCase);
                }

                foreach (Match match in matches)
                {
                    if (match.Groups.Count >= 3)
                    {
                        string gameName = match.Groups[2].Value.Trim();
                        string hoursStr = match.Groups[3].Value.Replace(",", "");

                        if (double.TryParse(hoursStr, out double hours))
                        {
                            result[gameName] = hours;
                        }
                    }
                }

                if (result.ContainsKey("Squad"))
                {
                    return ((int)result["Squad"], nickname);
                }
            }
            catch (Exception ex)
            {
                RainOpsLog.Log($"[Steam爬虫助手] 解析异常 ({steamid}): {ex.Message}");
            }

            return (0, "");
        }
    }
}