using System.Collections.Generic;
using System.Text.RegularExpressions;
using YwxAppWpfDanMu.Models;

namespace YwxAppWpfDanMu.Controls
{
    public static class DanMuFilter
    {
        private static readonly List<string> _blockedKeywords = new List<string>();
        private static readonly List<Regex> _blockedPatterns = new List<Regex>();

        public static void AddBlockedKeyword(string keyword)
        {
            if (!string.IsNullOrWhiteSpace(keyword) && !_blockedKeywords.Contains(keyword))
            {
                _blockedKeywords.Add(keyword);
            }
        }

        public static void AddBlockedPattern(string pattern)
        {
            if (!string.IsNullOrWhiteSpace(pattern))
            {
                _blockedPatterns.Add(new Regex(pattern, RegexOptions.Compiled | RegexOptions.IgnoreCase));
            }
        }

        public static bool ShouldFilter(DanMuMessage message)
        {
            if (message == null || string.IsNullOrWhiteSpace(message.Content))
                return true;

            // 检查关键词
            foreach (var keyword in _blockedKeywords)
            {
                if (message.Content.Contains(keyword))
                    return true;
            }

            // 检查正则表达式
            foreach (var pattern in _blockedPatterns)
            {
                if (pattern.IsMatch(message.Content))
                    return true;
            }

            return false;
        }
    }
}