/**
 * 🚀 Advanced C# Test File for Chahuadev Emoji Cleaner Tool
 * 📝 Comprehensive C# patterns with extensive emoji usage for testing
 * 🎯 Features: Modern C# features, async/await, LINQ, and emoji integration
 * 🧪 Perfect for testing emoji removal from C# source files
 * 
 * @author Chahuadev Development Team 👨‍💻
 * @version 2.0.0 🎯
 * @since 2025-01-20 📅
 */

using System; // 🔧 Core system functionality
using System.Collections.Generic; // 📦 Collections support
using System.Collections.Concurrent; // 🧵 Thread-safe collections
using System.Linq; // 🌊 LINQ queries
using System.Threading.Tasks; // ⚡ Async operations
using System.Threading; // 🧵 Threading support
using System.Text; // 📝 Text processing
using System.Text.RegularExpressions; // 🔍 Regular expressions
using System.IO; // 📁 File operations
using System.Diagnostics; // 📊 Performance monitoring
using System.Reflection; // 🪞 Reflection capabilities
using System.ComponentModel; // 🏷️ Component model
using System.Runtime.CompilerServices; // ⚙️ Compiler services
using System.Text.Json; // 📄 JSON serialization
using System.Globalization; // 🌍 Internationalization

namespace Chahuadev.EmojiCleaner.Test // 📦 Namespace declaration
{
    /// <summary>
    /// 🧪 Custom attribute for emoji testing metadata
    /// 🎯 Demonstrates attribute usage with emoji descriptions
    /// </summary>
    [AttributeUsage(AttributeTargets.Class | AttributeTargets.Method | AttributeTargets.Property)]
    public class EmojiTestAttribute : Attribute
    {
        /// <summary>🎯 Test description with emoji indicators</summary>
        public string Description { get; set; } = "🧪 Default test";
        
        /// <summary>📊 Test category classification</summary>
        public string Category { get; set; } = "🏷️ General";
        
        /// <summary>🔥 Priority level (1-5)</summary>
        public int Priority { get; set; } = 1;
        
        /// <summary>🏷️ Test tags for organization</summary>
        public string[] Tags { get; set; } = Array.Empty<string>();
        
        /// <summary>
        /// 🎯 Constructor with emoji-enhanced parameters
        /// </summary>
        /// <param name="description">📝 Test description</param>
        /// <param name="category">📊 Test category</param>
        public EmojiTestAttribute(string description, string category = "🏷️ General")
        {
            Description = description;
            Category = category;
        }
    }
    
    /// <summary>
    /// 📊 Immutable record for emoji statistics
    /// 🎯 Demonstrates C# 9+ record types with emoji data
    /// </summary>
    public record EmojiStatistics(
        int TotalEmojis,           // 🔢 Total emoji count
        int UniqueEmojis,          // 🎯 Unique emoji varieties
        TimeSpan ProcessingTime,   // ⏱️ Time taken for processing
        Dictionary<string, int> CategoryBreakdown,  // 📊 Category statistics
        double EfficiencyScore,    // 📈 Processing efficiency
        bool Success               // ✅ Success indicator
    )
    {
        /// <summary>
        /// 📋 Generate formatted report with emoji indicators
        /// </summary>
        /// <returns>📄 Formatted statistics report</returns>
        public string GenerateReport()
        {
            var report = new StringBuilder();
            report.AppendLine("📊 EMOJI PROCESSING STATISTICS");
            report.AppendLine("==============================");
            report.AppendLine();
            report.AppendLine($"🔢 Total emojis processed: {TotalEmojis}");
            report.AppendLine($"🎯 Unique emoji types: {UniqueEmojis}");
            report.AppendLine($"⏱️ Processing time: {ProcessingTime.TotalMilliseconds:F2} ms");
            report.AppendLine($"📈 Efficiency score: {EfficiencyScore:F2}%");
            report.AppendLine($"✅ Success status: {(Success ? "Completed" : "Failed")}");
            report.AppendLine();
            
            if (CategoryBreakdown.Count > 0)
            {
                report.AppendLine("🏷️ CATEGORY BREAKDOWN:");
                foreach (var (category, count) in CategoryBreakdown.OrderByDescending(x => x.Value))
                {
                    var percentage = (double)count / TotalEmojis * 100;
                    report.AppendLine($"  {category}: {count} emojis ({percentage:F1}%)");
                }
            }
            
            return report.ToString();
        }
    }
    
    /// <summary>
    /// 🎯 Delegate for emoji processing operations
    /// ⚡ Functional programming support with emoji context
    /// </summary>
    /// <typeparam name="TInput">📝 Input type</typeparam>
    /// <typeparam name="TOutput">📊 Output type</typeparam>
    /// <param name="input">📥 Input data</param>
    /// <param name="cancellationToken">🛑 Cancellation support</param>
    /// <returns>📤 Processed output</returns>
    public delegate Task<TOutput> EmojiProcessorDelegate<TInput, TOutput>(TInput input, CancellationToken cancellationToken);
    
    /// <summary>
    /// 🔧 Interface for emoji processing operations
    /// 🎯 Contract definition for emoji handlers
    /// </summary>
    public interface IEmojiProcessor
    {
        /// <summary>🏷️ Processor name with emoji indicator</summary>
        string Name { get; }
        
        /// <summary>📊 Current processing statistics</summary>
        EmojiStatistics Statistics { get; }
        
        /// <summary>
        /// 🧹 Process content to remove emojis
        /// </summary>
        /// <param name="content">📝 Input content</param>
        /// <param name="cancellationToken">🛑 Cancellation token</param>
        /// <returns>📊 Processing result</returns>
        Task<ProcessingResult> ProcessContentAsync(string content, CancellationToken cancellationToken = default);
        
        /// <summary>
        /// 📦 Process multiple content items in batch
        /// </summary>
        /// <param name="contentItems">📋 Content collection</param>
        /// <param name="cancellationToken">🛑 Cancellation token</param>
        /// <returns>📊 Batch processing results</returns>
        Task<IEnumerable<ProcessingResult>> ProcessBatchAsync(IEnumerable<string> contentItems, CancellationToken cancellationToken = default);
    }
    
    /// <summary>
    /// 📊 Processing result container
    /// 🎯 Encapsulates emoji processing outcomes
    /// </summary>
    public class ProcessingResult
    {
        /// <summary>📝 Original content before processing</summary>
        public string OriginalContent { get; init; } = string.Empty;
        
        /// <summary>🧹 Content after emoji removal</summary>
        public string CleanedContent { get; init; } = string.Empty;
        
        /// <summary>🔍 List of detected emojis</summary>
        public IReadOnlyList<string> FoundEmojis { get; init; } = Array.Empty<string>();
        
        /// <summary>📊 Category-wise emoji statistics</summary>
        public IReadOnlyDictionary<string, int> CategoryStats { get; init; } = new Dictionary<string, int>();
        
        /// <summary>⏱️ Time taken for processing</summary>
        public TimeSpan ProcessingTime { get; init; }
        
        /// <summary>✅ Success indicator</summary>
        public bool Success { get; init; }
        
        /// <summary>❌ Error message if processing failed</summary>
        public string? ErrorMessage { get; init; }
        
        /// <summary>🏷️ Processor identifier</summary>
        public string ProcessorName { get; init; } = "🔧 Unknown";
        
        /// <summary>
        /// 📈 Calculate processing efficiency
        /// </summary>
        /// <returns>📊 Efficiency percentage</returns>
        public double CalculateEfficiency()
        {
            if (OriginalContent.Length == 0) return 100.0;
            
            var reductionRatio = (double)FoundEmojis.Count / OriginalContent.Length;
            return Math.Min(100.0, reductionRatio * 100.0);
        }
        
        /// <summary>
        /// 📋 Generate detailed processing report
        /// </summary>
        /// <returns>📄 Formatted report string</returns>
        public string GenerateDetailedReport()
        {
            var report = new StringBuilder();
            report.AppendLine("🎯 PROCESSING RESULT REPORT");
            report.AppendLine("==========================");
            report.AppendLine();
            report.AppendLine($"🏷️ Processor: {ProcessorName}");
            report.AppendLine($"📝 Original length: {OriginalContent.Length:N0} characters");
            report.AppendLine($"🧹 Cleaned length: {CleanedContent.Length:N0} characters");
            report.AppendLine($"🔍 Emojis detected: {FoundEmojis.Count:N0}");
            report.AppendLine($"⏱️ Processing time: {ProcessingTime.TotalMilliseconds:F2} ms");
            report.AppendLine($"📈 Efficiency: {CalculateEfficiency():F2}%");
            report.AppendLine($"✅ Status: {(Success ? "Success" : "Failed")}");
            
            if (!string.IsNullOrEmpty(ErrorMessage))
            {
                report.AppendLine($"❌ Error: {ErrorMessage}");
            }
            
            return report.ToString();
        }
    }
    
    /// <summary>
    /// 🧹 Advanced emoji processor implementation
    /// ⚡ High-performance emoji cleaning with modern C# features
    /// </summary>
    [EmojiTest("🧪 Advanced processor implementation", "🔧 Core")]
    public class AdvancedEmojiProcessor : IEmojiProcessor, IDisposable
    {
        // 🔍 Emoji detection patterns for different categories
        private static readonly Dictionary<string, Regex> EmojiPatterns = new()
        {
            ["😀 Faces"] = new Regex(@"[\u{1F600}-\u{1F64F}]", RegexOptions.Compiled | RegexOptions.CultureInvariant),
            ["❤️ Hearts"] = new Regex(@"[\u{1F495}-\u{1F49F}]|❤️|🧡|💛|💚|💙|💜", RegexOptions.Compiled | RegexOptions.CultureInvariant),
            ["🚀 Objects"] = new Regex(@"[\u{1F680}-\u{1F6FF}]", RegexOptions.Compiled | RegexOptions.CultureInvariant),
            ["🌸 Nature"] = new Regex(@"[\u{1F300}-\u{1F5FF}]", RegexOptions.Compiled | RegexOptions.CultureInvariant),
            ["🎯 Symbols"] = new Regex(@"[\u{2600}-\u{26FF}]", RegexOptions.Compiled | RegexOptions.CultureInvariant)
        };
        
        // 💾 Thread-safe caching for performance optimization
        private readonly ConcurrentDictionary<string, List<string>> _emojiCache = new();
        
        // 📊 Atomic counters for statistics tracking
        private long _totalProcessed = 0;
        private long _totalEmojisRemoved = 0;
        private long _totalProcessingTimeMs = 0;
        
        // ⚙️ Configuration and state
        private readonly SemaphoreSlim _semaphore;
        private readonly CancellationTokenSource _disposalTokenSource = new();
        private bool _disposed = false;
        
        /// <summary>🏷️ Processor name with emoji indicator</summary>
        public string Name => "🧹 Advanced C# Emoji Processor";
        
        /// <summary>📊 Current processing statistics</summary>
        public EmojiStatistics Statistics => CalculateCurrentStatistics();
        
        /// <summary>
        /// 🎯 Constructor with configuration options
        /// </summary>
        /// <param name="maxConcurrency">🧵 Maximum concurrent operations</param>
        public AdvancedEmojiProcessor(int maxConcurrency = Environment.ProcessorCount)
        {
            _semaphore = new SemaphoreSlim(maxConcurrency, maxConcurrency);
            LogMessage("✅ Advanced emoji processor initialized successfully");
        }
        
        /// <summary>
        /// 🧹 Process content to remove emojis asynchronously
        /// </summary>
        /// <param name="content">📝 Input content with emojis</param>
        /// <param name="cancellationToken">🛑 Cancellation token</param>
        /// <returns>📊 Processing result</returns>
        [EmojiTest("🔧 Core processing method", "⚡ Performance")]
        public async Task<ProcessingResult> ProcessContentAsync(string content, CancellationToken cancellationToken = default)
        {
            if (_disposed) throw new ObjectDisposedException(nameof(AdvancedEmojiProcessor));
            if (string.IsNullOrEmpty(content))
                return CreateEmptyResult(content, "📝 Empty or null content provided");
            
            var stopwatch = Stopwatch.StartNew();
            
            try
            {
                await _semaphore.WaitAsync(cancellationToken);
                
                using var combinedToken = CancellationTokenSource.CreateLinkedTokenSource(
                    cancellationToken, _disposalTokenSource.Token);
                
                LogMessage($"🔄 Processing content ({content.Length:N0} characters)");
                
                // 🔍 Detect emojis with parallel processing
                var foundEmojis = await DetectEmojisAsync(content, combinedToken.Token);
                
                // 📊 Generate category statistics
                var categoryStats = await GenerateCategoryStatisticsAsync(foundEmojis, combinedToken.Token);
                
                // 🧹 Remove emojis from content
                var cleanedContent = await RemoveEmojisAsync(content, foundEmojis, combinedToken.Token);
                
                stopwatch.Stop();
                
                // 📊 Update global statistics
                Interlocked.Increment(ref _totalProcessed);
                Interlocked.Add(ref _totalEmojisRemoved, foundEmojis.Count);
                Interlocked.Add(ref _totalProcessingTimeMs, stopwatch.ElapsedMilliseconds);
                
                var result = new ProcessingResult
                {
                    OriginalContent = content,
                    CleanedContent = cleanedContent,
                    FoundEmojis = foundEmojis.AsReadOnly(),
                    CategoryStats = categoryStats,
                    ProcessingTime = stopwatch.Elapsed,
                    Success = true,
                    ProcessorName = Name
                };
                
                LogMessage($"✅ Processing completed: {foundEmojis.Count} emojis removed in {stopwatch.ElapsedMilliseconds} ms");
                return result;
            }
            catch (OperationCanceledException)
            {
                LogMessage("🛑 Processing cancelled by user request");
                return CreateErrorResult(content, "🛑 Operation was cancelled", stopwatch.Elapsed);
            }
            catch (Exception ex)
            {
                LogMessage($"❌ Processing failed: {ex.Message}");
                return CreateErrorResult(content, $"❌ Processing error: {ex.Message}", stopwatch.Elapsed);
            }
            finally
            {
                _semaphore.Release();
                stopwatch.Stop();
            }
        }
        
        /// <summary>
        /// 📦 Process multiple content items in batch
        /// </summary>
        /// <param name="contentItems">📋 Content collection</param>
        /// <param name="cancellationToken">🛑 Cancellation token</param>
        /// <returns>📊 Batch processing results</returns>
        [EmojiTest("📦 Batch processing capability", "⚡ Performance")]
        public async Task<IEnumerable<ProcessingResult>> ProcessBatchAsync(
            IEnumerable<string> contentItems, 
            CancellationToken cancellationToken = default)
        {
            if (_disposed) throw new ObjectDisposedException(nameof(AdvancedEmojiProcessor));
            
            var items = contentItems?.ToList() ?? new List<string>();
            LogMessage($"📦 Starting batch processing for {items.Count:N0} items");
            
            // 🧵 Process items concurrently with controlled parallelism
            var tasks = items.Select(async (content, index) =>
            {
                try
                {
                    var result = await ProcessContentAsync(content, cancellationToken);
                    return result;
                }
                catch (Exception ex)
                {
                    LogMessage($"❌ Batch item {index} failed: {ex.Message}");
                    return CreateErrorResult(content, $"❌ Batch processing error: {ex.Message}", TimeSpan.Zero);
                }
            });
            
            var results = await Task.WhenAll(tasks);
            
            var successCount = results.Count(r => r.Success);
            var totalEmojis = results.Sum(r => r.FoundEmojis.Count);
            
            LogMessage($"📦 Batch processing completed: {successCount}/{items.Count} successful, {totalEmojis:N0} emojis removed");
            
            return results;
        }
        
        /// <summary>
        /// 🔍 Detect emojis in content using parallel pattern matching
        /// </summary>
        /// <param name="content">📝 Content to analyze</param>
        /// <param name="cancellationToken">🛑 Cancellation token</param>
        /// <returns>📋 List of found emojis</returns>
        private async Task<List<string>> DetectEmojisAsync(string content, CancellationToken cancellationToken)
        {
            // 💾 Check cache first for performance
            var cacheKey = content.GetHashCode().ToString();
            if (_emojiCache.TryGetValue(cacheKey, out var cachedEmojis))
            {
                LogMessage("📊 Cache hit for emoji detection");
                return new List<string>(cachedEmojis);
            }
            
            // 🔍 Parallel detection across emoji categories
            var detectionTasks = EmojiPatterns.Select(async pattern =>
            {
                return await Task.Run(() =>
                {
                    cancellationToken.ThrowIfCancellationRequested();
                    
                    var matches = pattern.Value.Matches(content);
                    return matches.Cast<Match>().Select(m => m.Value).ToList();
                }, cancellationToken);
            });
            
            var categoryResults = await Task.WhenAll(detectionTasks);
            
            // 🎯 Combine and deduplicate results
            var allEmojis = categoryResults
                .SelectMany(emojis => emojis)
                .Distinct()
                .OrderBy(emoji => emoji)
                .ToList();
            
            // 💾 Cache results for future use
            _emojiCache.TryAdd(cacheKey, new List<string>(allEmojis));
            
            return allEmojis;
        }
        
        /// <summary>
        /// 📊 Generate category statistics for detected emojis
        /// </summary>
        /// <param name="emojis">🔍 Detected emoji list</param>
        /// <param name="cancellationToken">🛑 Cancellation token</param>
        /// <returns>📈 Category statistics dictionary</returns>
        private async Task<Dictionary<string, int>> GenerateCategoryStatisticsAsync(
            List<string> emojis, 
            CancellationToken cancellationToken)
        {
            var categoryStats = new Dictionary<string, int>();
            
            // 🔄 Count emojis by category using parallel processing
            var categoryTasks = EmojiPatterns.Select(async pattern =>
            {
                var (categoryName, regex) = pattern;
                
                var count = await Task.Run(() =>
                {
                    cancellationToken.ThrowIfCancellationRequested();
                    return emojis.Count(emoji => regex.IsMatch(emoji));
                }, cancellationToken);
                
                return new { Category = categoryName, Count = count };
            });
            
            var results = await Task.WhenAll(categoryTasks);
            
            foreach (var result in results.Where(r => r.Count > 0))
            {
                categoryStats[result.Category] = result.Count;
            }
            
            return categoryStats;
        }
        
        /// <summary>
        /// 🧹 Remove detected emojis from content
        /// </summary>
        /// <param name="content">📝 Original content</param>
        /// <param name="emojis">🔍 Emojis to remove</param>
        /// <param name="cancellationToken">🛑 Cancellation token</param>
        /// <returns>🧹 Cleaned content</returns>
        private async Task<string> RemoveEmojisAsync(
            string content, 
            List<string> emojis, 
            CancellationToken cancellationToken)
        {
            return await Task.Run(() =>
            {
                cancellationToken.ThrowIfCancellationRequested();
                
                var result = content;
                
                // 🔄 Remove each detected emoji
                foreach (var emoji in emojis)
                {
                    cancellationToken.ThrowIfCancellationRequested();
                    result = result.Replace(emoji, string.Empty);
                }
                
                // 🧹 Clean up extra whitespace
                result = Regex.Replace(result, @"\s+", " ").Trim();
                
                return result;
            }, cancellationToken);
        }
        
        /// <summary>
        /// 📊 Calculate current processor statistics
        /// </summary>
        /// <returns>📈 Current statistics</returns>
        private EmojiStatistics CalculateCurrentStatistics()
        {
            var totalProcessed = Interlocked.Read(ref _totalProcessed);
            var totalEmojisRemoved = Interlocked.Read(ref _totalEmojisRemoved);
            var totalTimeMs = Interlocked.Read(ref _totalProcessingTimeMs);
            
            var avgTimeMs = totalProcessed > 0 ? (double)totalTimeMs / totalProcessed : 0.0;
            var efficiency = totalProcessed > 0 ? (double)totalEmojisRemoved / totalProcessed * 100 : 0.0;
            
            return new EmojiStatistics(
                TotalEmojis: (int)totalEmojisRemoved,
                UniqueEmojis: _emojiCache.Values.SelectMany(v => v).Distinct().Count(),
                ProcessingTime: TimeSpan.FromMilliseconds(avgTimeMs),
                CategoryBreakdown: new Dictionary<string, int>(),
                EfficiencyScore: efficiency,
                Success: true
            );
        }
        
        /// <summary>
        /// 📝 Create empty result for invalid input
        /// </summary>
        /// <param name="content">📝 Original content</param>
        /// <param name="message">💬 Error message</param>
        /// <returns>📊 Empty processing result</returns>
        private ProcessingResult CreateEmptyResult(string content, string message)
        {
            return new ProcessingResult
            {
                OriginalContent = content ?? string.Empty,
                CleanedContent = content ?? string.Empty,
                FoundEmojis = Array.Empty<string>(),
                CategoryStats = new Dictionary<string, int>(),
                ProcessingTime = TimeSpan.Zero,
                Success = false,
                ErrorMessage = message,
                ProcessorName = Name
            };
        }
        
        /// <summary>
        /// ❌ Create error result for failed processing
        /// </summary>
        /// <param name="content">📝 Original content</param>
        /// <param name="error">❌ Error message</param>
        /// <param name="elapsed">⏱️ Elapsed time</param>
        /// <returns>📊 Error processing result</returns>
        private ProcessingResult CreateErrorResult(string content, string error, TimeSpan elapsed)
        {
            return new ProcessingResult
            {
                OriginalContent = content,
                CleanedContent = content, // 🔄 Return original on error
                FoundEmojis = Array.Empty<string>(),
                CategoryStats = new Dictionary<string, int>(),
                ProcessingTime = elapsed,
                Success = false,
                ErrorMessage = error,
                ProcessorName = Name
            };
        }
        
        /// <summary>
        /// 📝 Log message with timestamp and emoji indicators
        /// </summary>
        /// <param name="message">💬 Message to log</param>
        private void LogMessage(string message)
        {
            var timestamp = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff", CultureInfo.InvariantCulture);
            Console.WriteLine($"[{timestamp}] 🕒 {Name}: {message}");
        }
        
        /// <summary>
        /// 🧹 Dispose pattern implementation
        /// </summary>
        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }
        
        /// <summary>
        /// 🧹 Protected dispose implementation
        /// </summary>
        /// <param name="disposing">🔄 Disposing flag</param>
        protected virtual void Dispose(bool disposing)
        {
            if (!_disposed && disposing)
            {
                LogMessage("🔄 Disposing emoji processor resources");
                
                _disposalTokenSource.Cancel();
                _semaphore?.Dispose();
                _disposalTokenSource?.Dispose();
                _emojiCache.Clear();
                
                _disposed = true;
                LogMessage("✅ Emoji processor disposed successfully");
            }
        }
    }
    
    /// <summary>
    /// 🛠️ Utility class for emoji-related operations
    /// 🎯 Static helper methods for emoji analysis
    /// </summary>
    public static class EmojiUtilities
    {
        // 🔍 Comprehensive emoji detection pattern
        private static readonly Regex AllEmojisPattern = new(
            @"[\u{1F600}-\u{1F64F}]|[\u{1F300}-\u{1F5FF}]|[\u{1F680}-\u{1F6FF}]|[\u{2600}-\u{26FF}]|[\u{1F1E0}-\u{1F1FF}]|[\u{1F900}-\u{1F9FF}]",
            RegexOptions.Compiled | RegexOptions.CultureInvariant);
        
        /// <summary>
        /// 📊 Count emoji frequency in text
        /// </summary>
        /// <param name="text">📝 Text to analyze</param>
        /// <returns>📈 Emoji frequency dictionary</returns>
        public static Dictionary<string, int> CountEmojiFrequency(string text)
        {
            if (string.IsNullOrEmpty(text)) return new Dictionary<string, int>();
            
            return AllEmojisPattern.Matches(text)
                .Cast<Match>()
                .GroupBy(m => m.Value)
                .ToDictionary(g => g.Key, g => g.Count());
        }
        
        /// <summary>
        /// 🔍 Extract all emojis from text
        /// </summary>
        /// <param name="text">📝 Source text</param>
        /// <returns>📋 List of unique emojis</returns>
        public static List<string> ExtractEmojis(string text)
        {
            if (string.IsNullOrEmpty(text)) return new List<string>();
            
            return AllEmojisPattern.Matches(text)
                .Cast<Match>()
                .Select(m => m.Value)
                .Distinct()
                .OrderBy(emoji => emoji)
                .ToList();
        }
        
        /// <summary>
        /// ✅ Check if text contains any emojis
        /// </summary>
        /// <param name="text">📝 Text to check</param>
        /// <returns>🔍 True if emojis are found</returns>
        public static bool ContainsEmojis(string text)
        {
            return !string.IsNullOrEmpty(text) && AllEmojisPattern.IsMatch(text);
        }
        
        /// <summary>
        /// 📏 Calculate text length excluding emojis
        /// </summary>
        /// <param name="text">📝 Input text</param>
        /// <returns>📊 Length without emojis</returns>
        public static int LengthWithoutEmojis(string text)
        {
            if (string.IsNullOrEmpty(text)) return 0;
            
            var cleanText = AllEmojisPattern.Replace(text, string.Empty);
            return cleanText.Length;
        }
        
        /// <summary>
        /// 📈 Calculate emoji density in text
        /// </summary>
        /// <param name="text">📝 Text to analyze</param>
        /// <returns>📊 Emoji density percentage</returns>
        public static double CalculateEmojiDensity(string text)
        {
            if (string.IsNullOrEmpty(text)) return 0.0;
            
            var emojiCount = AllEmojisPattern.Matches(text).Count;
            return (double)emojiCount / text.Length * 100.0;
        }
        
        /// <summary>
        /// 📋 Generate comprehensive emoji analysis report
        /// </summary>
        /// <param name="text">📝 Text to analyze</param>
        /// <returns>📄 Formatted analysis report</returns>
        public static string GenerateAnalysisReport(string text)
        {
            if (string.IsNullOrEmpty(text))
                return "📝 No content provided for analysis";
            
            var emojis = ExtractEmojis(text);
            var frequency = CountEmojiFrequency(text);
            var density = CalculateEmojiDensity(text);
            var lengthWithoutEmojis = LengthWithoutEmojis(text);
            
            var report = new StringBuilder();
            report.AppendLine("🎯 COMPREHENSIVE EMOJI ANALYSIS");
            report.AppendLine("===============================");
            report.AppendLine();
            report.AppendLine($"📝 Total characters: {text.Length:N0}");
            report.AppendLine($"🔍 Total emojis: {frequency.Values.Sum():N0}");
            report.AppendLine($"🎯 Unique emojis: {emojis.Count:N0}");
            report.AppendLine($"📏 Length without emojis: {lengthWithoutEmojis:N0}");
            report.AppendLine($"📈 Emoji density: {density:F2}%");
            report.AppendLine($"✅ Contains emojis: {(emojis.Count > 0 ? "Yes" : "No")}");
            report.AppendLine();
            
            if (frequency.Count > 0)
            {
                report.AppendLine("🏆 MOST FREQUENT EMOJIS:");
                foreach (var (emoji, count) in frequency.OrderByDescending(x => x.Value).Take(10))
                {
                    var percentage = (double)count / frequency.Values.Sum() * 100;
                    report.AppendLine($"  {emoji}: {count:N0} times ({percentage:F1}%)");
                }
                report.AppendLine();
            }
            
            if (emojis.Count > 0)
            {
                report.AppendLine("📋 ALL DETECTED EMOJIS:");
                report.AppendLine($"  {string.Join(" ", emojis)}");
            }
            
            return report.ToString();
        }
    }
    
    /// <summary>
    /// 🧪 Test runner for emoji processor validation
    /// 🎯 Comprehensive testing with performance metrics
    /// </summary>
    [EmojiTest("🧪 Main test runner class", "🎪 Testing")]
    public class EmojiProcessorTestRunner
    {
        /// <summary>
        /// 🚀 Main entry point for emoji processor tests
        /// </summary>
        /// <param name="args">📋 Command line arguments</param>
        /// <returns>⚡ Async task completion</returns>
        public static async Task Main(string[] args)
        {
            Console.WriteLine("🎉 Starting Chahuadev C# Emoji Cleaner Test Suite! 🧪\n");
            
            // 🔧 Initialize processor
            using var processor = new AdvancedEmojiProcessor(maxConcurrency: 4);
            
            try
            {
                // 🧪 Run comprehensive test suite
                await RunBasicTests(processor);
                await RunAdvancedTests(processor);
                await RunPerformanceTests(processor);
                await RunBatchTests(processor);
                await RunUtilityTests();
                
                // 📊 Display final statistics
                await DisplayFinalStatistics(processor);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"❌ Test suite failed: {ex.Message}");
            }
            
            Console.WriteLine("\n🎉 All tests completed successfully! ✅");
        }
        
        /// <summary>
        /// 🧪 Run basic emoji processing tests
        /// </summary>
        /// <param name="processor">🔧 Processor instance</param>
        private static async Task RunBasicTests(IEmojiProcessor processor)
        {
            Console.WriteLine("🧪 Running basic emoji processing tests...\n");
            
            var testCases = new Dictionary<string, string>
            {
                ["🎯 Simple Faces"] = "Hello 😊 World! 😀 This is a test 🙂 with basic emojis 😃!",
                ["❤️ Hearts and Love"] = "I love ❤️ programming! 💕 C# is amazing 💖 for development 💘!",
                ["🚀 Objects and Tools"] = "Check out this rocket 🚀! We use tools 🔧 and technology 💻 daily ⚡!",
                ["🌸 Nature Elements"] = "Beautiful flowers 🌸🌺🌻 grow in the garden 🌱 under the sun ☀️!",
                ["🎪 Mixed Content"] = "🎉 Celebration time! 🚀 Let's code! 😊 Happy programming 💻 with emojis 🎨!"
            };
            
            foreach (var (testName, content) in testCases)
            {
                Console.WriteLine($"Testing: {testName}");
                var result = await processor.ProcessContentAsync(content);
                
                Console.WriteLine($"  📝 Original: {TruncateString(content, 50)}");
                Console.WriteLine($"  🧹 Cleaned: {TruncateString(result.CleanedContent, 50)}");
                Console.WriteLine($"  🔍 Emojis found: {result.FoundEmojis.Count}");
                Console.WriteLine($"  ⏱️ Time: {result.ProcessingTime.TotalMilliseconds:F2} ms");
                Console.WriteLine($"  ✅ Success: {result.Success}");
                Console.WriteLine();
            }
        }
        
        /// <summary>
        /// 🔬 Run advanced emoji processing tests
        /// </summary>
        /// <param name="processor">🔧 Processor instance</param>
        private static async Task RunAdvancedTests(IEmojiProcessor processor)
        {
            Console.WriteLine("🔬 Running advanced emoji processing tests...\n");
            
            var complexContent = """
                🎯 Welcome to our comprehensive C# emoji testing suite! 🧪
                
                This content includes various emoji categories:
                • 😀 Facial expressions: 😊 😂 🤣 😍 🥰 😘 😎 🤓 😴 😇 🙃 😉
                • ❤️ Hearts and emotions: 💕 💖 💗 💘 💝 💞 💟 💔 ❣️ 💋 😍 🥰
                • 🚀 Technology objects: 💻 📱 ⌨️ 🖥️ 🖨️ 📡 💾 💿 📀 🔌 🔋 💡
                • 🌸 Nature elements: 🌱 🌿 🍀 🌾 🌳 🌲 🌴 🌵 🌺 🌻 🌼 🌷
                • 🎯 Symbols and signs: ⭐ 🌟 ✨ 💫 🌙 ☀️ ⛅ 🌈 ⚡ 🔥 💧 🌊
                
                Advanced unicode sequences:
                👨‍💻 Developer coding in C# 💻 with Visual Studio 🎯
                👩‍🚀 Astronaut exploring 🌍 space with advanced 🚀 technology
                🏳️‍🌈 Rainbow flag representing 🌈 diversity in tech community
                👨‍👩‍👧‍👦 Family enjoying 🎪 technology conference together
                
                Skin tone modifiers and variations:
                👋🏻 👋🏼 👋🏽 👋🏾 👋🏿 (greeting with skin tone diversity)
                👍🏻 👍🏼 👍🏽 👍🏾 👍🏿 (approval across all backgrounds)
                👨🏻‍💻 👨🏼‍💻 👨🏽‍💻 👨🏾‍💻 👨🏿‍💻 (diverse developers)
                
                Multilingual content with emojis:
                English: Hello 👋 World! 🌍 Welcome to C# programming! 💻
                ไทย: สวัสดี 🙏 ชาวโลก! 🌎 ยินดีต้อนรับสู่การเขียนโปรแกรม C#! 👨‍💻
                日本語: こんにちは 👋 世界! 🌏 C# プログラミングへようこそ! 🎯
                Español: ¡Hola 👋 Mundo! 🌍 ¡Bienvenido a la programación C#! 🚀
                
                Performance and statistics:
                📊 Processing speed: 1000+ emojis/second ⚡
                📈 Accuracy rate: 99.8% detection success ✅
                ⏰ Response time: < 100ms average 🎯
                💾 Memory usage: Optimized for efficiency 🧠
                🔧 Concurrent processing: Multi-threaded support 🧵
                
                Special characters and edge cases:
                Unicode combinations: 🤦‍♀️ 🤷‍♂️ 💁‍♀️ 🙋‍♂️ 🙎‍♀️ 🙍‍♂️
                Food and drinks: ☕ 🍕 🍔 🍟 🌭 🥪 🌮 🌯 🥙 🍗 🍖 🥓
                Sports and activities: ⚽ 🏀 🏈 ⚾ 🎾 🏐 🏉 🎱 🏓 🏸 🥅
                Transportation: 🚗 🚕 🚙 🚌 🚎 🏎️ 🚓 🚑 🚒 🚐 🛻 🚚
                
                🎉 End of advanced testing content! 🧪✨
                """;
            
            Console.WriteLine($"Processing complex content with 100+ emojis ({complexContent.Length:N0} characters)...");
            
            var result = await processor.ProcessContentAsync(complexContent);
            Console.WriteLine(result.GenerateDetailedReport());
            
            // 📊 Category analysis
            Console.WriteLine("🏷️ Detailed Category Analysis:");
            foreach (var (category, count) in result.CategoryStats.OrderByDescending(x => x.Value))
            {
                var percentage = (double)count / result.FoundEmojis.Count * 100;
                Console.WriteLine($"  {category}: {count:N0} emojis ({percentage:F1}%)");
            }
            Console.WriteLine();
        }
        
        /// <summary>
        /// ⚡ Run performance and stress tests
        /// </summary>
        /// <param name="processor">🔧 Processor instance</param>
        private static async Task RunPerformanceTests(IEmojiProcessor processor)
        {
            Console.WriteLine("⚡ Running performance tests...\n");
            
            // 📊 Generate large content for stress testing
            var emojiSamples = new[]
            {
                "😀", "😃", "😄", "😁", "😆", "😅", "🤣", "😂", "🙂", "🙃",
                "😉", "😊", "😇", "🥰", "😍", "🤩", "😘", "😗", "😚", "😙",
                "🚀", "⚡", "🔥", "💧", "🌟", "✨", "💫", "⭐", "🌙", "☀️",
                "❤️", "🧡", "💛", "💚", "💙", "💜", "🤎", "🖤", "🤍", "💔",
                "📊", "📈", "📉", "📋", "📌", "📍", "📎", "📏", "📐", "📑"
            };
            
            var contentBuilder = new StringBuilder();
            var random = new Random(42); // 🎯 Deterministic for reproducible tests
            
            // 🔄 Generate content with 2000+ emojis
            for (int i = 0; i < 2000; i++)
            {
                contentBuilder.Append($"Sample text {i} ");
                contentBuilder.Append(emojiSamples[i % emojiSamples.Length]);
                contentBuilder.Append(" ");
                
                if (i % 20 == 0) contentBuilder.AppendLine();
            }
            
            var testContent = contentBuilder.ToString();
            Console.WriteLine($"📊 Generated performance test content: {testContent.Length:N0} characters");
            
            // ⏱️ Multiple performance runs for accuracy
            var results = new List<ProcessingResult>();
            var totalStopwatch = Stopwatch.StartNew();
            
            for (int run = 0; run < 5; run++)
            {
                var runResult = await processor.ProcessContentAsync(testContent);
                results.Add(runResult);
                Console.WriteLine($"  🔄 Run {run + 1}: {runResult.FoundEmojis.Count} emojis in {runResult.ProcessingTime.TotalMilliseconds:F2} ms");
            }
            
            totalStopwatch.Stop();
            
            // 📈 Calculate performance metrics
            var avgTime = results.Average(r => r.ProcessingTime.TotalMilliseconds);
            var avgEmojis = results.Average(r => r.FoundEmojis.Count);
            var avgThroughput = avgEmojis / (avgTime / 1000.0);
            var successRate = results.Count(r => r.Success) / (double)results.Count * 100;
            
            Console.WriteLine("\n⚡ PERFORMANCE SUMMARY:");
            Console.WriteLine($"  📊 Average processing time: {avgTime:F2} ms");
            Console.WriteLine($"  🔍 Average emojis processed: {avgEmojis:F0}");
            Console.WriteLine($"  🚀 Average throughput: {avgThroughput:F0} emojis/second");
            Console.WriteLine($"  ✅ Success rate: {successRate:F1}%");
            Console.WriteLine($"  ⏱️ Total test time: {totalStopwatch.Elapsed.TotalSeconds:F2} seconds");
            Console.WriteLine();
        }
        
        /// <summary>
        /// 📦 Run batch processing tests
        /// </summary>
        /// <param name="processor">🔧 Processor instance</param>
        private static async Task RunBatchTests(IEmojiProcessor processor)
        {
            Console.WriteLine("📦 Running batch processing tests...\n");
            
            var batchContent = new List<string>
            {
                "🎯 First batch item with various emojis 😊 and text content 📝",
                "🚀 Second item containing rockets 🚀 and stars ⭐✨ for testing",
                "❤️ Third piece with hearts 💕 and love 💖 symbols everywhere",
                "🌸 Fourth content about nature 🌿 flowers 🌺 and growth 🌱",
                "🎪 Fifth document mixing celebration 🎉 and fun 🎈 activities",
                "💻 Sixth item about technology 📱 coding 👨‍💻 and innovation",
                "🍎 Seventh piece with food 🍕 drinks ☕ and culinary 🍳 emojis",
                "🏠 Eighth content about places 🏢 travel ✈️ and exploration 🗺️",
                "🎨 Ninth document with art 🖼️ creativity 🎭 and design 🎪",
                "🧪 Tenth item for scientific 🔬 testing 📊 and research 📚 purposes",
                "🎵 Eleventh content with music 🎶 entertainment 🎬 and media 📺",
                "🏆 Twelfth item celebrating achievements 🥇 success ✅ and victory 🎉"
            };
            
            Console.WriteLine($"Processing batch of {batchContent.Count:N0} items...");
            
            var batchStopwatch = Stopwatch.StartNew();
            var batchResults = await processor.ProcessBatchAsync(batchContent);
            batchStopwatch.Stop();
            
            var resultsList = batchResults.ToList();
            var totalEmojis = resultsList.Sum(r => r.FoundEmojis.Count);
            var successCount = resultsList.Count(r => r.Success);
            var avgTimePerItem = resultsList.Average(r => r.ProcessingTime.TotalMilliseconds);
            
            Console.WriteLine("📦 BATCH PROCESSING RESULTS:");
            Console.WriteLine($"  📊 Items processed: {resultsList.Count:N0}");
            Console.WriteLine($"  ✅ Successful items: {successCount:N0} ({(double)successCount / resultsList.Count * 100:F1}%)");
            Console.WriteLine($"  🔍 Total emojis removed: {totalEmojis:N0}");
            Console.WriteLine($"  ⏱️ Total batch time: {batchStopwatch.Elapsed.TotalMilliseconds:F2} ms");
            Console.WriteLine($"  📈 Average per item: {avgTimePerItem:F2} ms");
            Console.WriteLine($"  🚀 Batch throughput: {totalEmojis / batchStopwatch.Elapsed.TotalSeconds:F0} emojis/second");
            Console.WriteLine();
        }
        
        /// <summary>
        /// 🛠️ Run utility function tests
        /// </summary>
        private static async Task RunUtilityTests()
        {
            Console.WriteLine("🛠️ Running utility function tests...\n");
            
            var testText = "🎯 Sample text with emojis! 😊 Testing utilities 🧪 for analysis 📊 and reporting 📋! ⚡✨🎉";
            
            Console.WriteLine("Testing EmojiUtilities functions:");
            Console.WriteLine($"  📝 Test text: {testText}");
            Console.WriteLine();
            
            // 🔍 Test individual utility functions
            var emojis = EmojiUtilities.ExtractEmojis(testText);
            var frequency = EmojiUtilities.CountEmojiFrequency(testText);
            var containsEmojis = EmojiUtilities.ContainsEmojis(testText);
            var lengthWithoutEmojis = EmojiUtilities.LengthWithoutEmojis(testText);
            var density = EmojiUtilities.CalculateEmojiDensity(testText);
            
            Console.WriteLine("🔍 UTILITY FUNCTION RESULTS:");
            Console.WriteLine($"  📋 Extracted emojis: {string.Join(" ", emojis)}");
            Console.WriteLine($"  📊 Emoji frequency: {frequency.Count} unique, {frequency.Values.Sum()} total");
            Console.WriteLine($"  ✅ Contains emojis: {containsEmojis}");
            Console.WriteLine($"  📏 Length without emojis: {lengthWithoutEmojis} characters");
            Console.WriteLine($"  📈 Emoji density: {density:F2}%");
            Console.WriteLine();
            
            // 📋 Generate and display comprehensive analysis
            var analysisReport = EmojiUtilities.GenerateAnalysisReport(testText);
            Console.WriteLine("📋 COMPREHENSIVE ANALYSIS REPORT:");
            Console.WriteLine(analysisReport);
            
            await Task.Delay(10); // 🔄 Simulate async operation
        }
        
        /// <summary>
        /// 📊 Display final processor statistics
        /// </summary>
        /// <param name="processor">🔧 Processor instance</param>
        private static async Task DisplayFinalStatistics(IEmojiProcessor processor)
        {
            Console.WriteLine("📊 FINAL PROCESSOR STATISTICS");
            Console.WriteLine("=============================\n");
            
            var stats = processor.Statistics;
            Console.WriteLine(stats.GenerateReport());
            
            // 🎯 Additional processor information
            Console.WriteLine("🔧 PROCESSOR INFORMATION:");
            Console.WriteLine($"  🏷️ Name: {processor.Name}");
            Console.WriteLine($"  ⚙️ Type: {processor.GetType().Name}");
            Console.WriteLine($"  🧵 Thread-safe: Yes");
            Console.WriteLine($"  💾 Caching: Enabled");
            Console.WriteLine($"  ⚡ Async support: Full");
            Console.WriteLine();
            
            await Task.Delay(10); // 🔄 Simulate async operation
        }
        
        /// <summary>
        /// ✂️ Truncate string for display purposes
        /// </summary>
        /// <param name="text">📝 Text to truncate</param>
        /// <param name="maxLength">📏 Maximum length</param>
        /// <returns>✂️ Truncated text</returns>
        private static string TruncateString(string text, int maxLength)
        {
            if (string.IsNullOrEmpty(text) || text.Length <= maxLength)
                return text;
            
            return text[..maxLength] + "...";
        }
    }
    
    /// <summary>
    /// 🏭 Factory for creating test data with emoji content
    /// 📊 Generates various test scenarios for validation
    /// </summary>
    public static class EmojiTestDataFactory
    {
        private static readonly Random Random = new(Environment.TickCount);
        
        /// <summary>
        /// 🎯 Generate test content with specified characteristics
        /// </summary>
        /// <param name="wordCount">📊 Number of words</param>
        /// <param name="emojiDensity">📈 Percentage of emoji content</param>
        /// <returns>📝 Generated test content</returns>
        public static string GenerateTestContent(int wordCount, double emojiDensity)
        {
            var words = new[]
            {
                "test", "content", "sample", "example", "demonstration", "validation",
                "processing", "analysis", "performance", "optimization", "efficiency",
                "technology", "innovation", "development", "programming", "software"
            };
            
            var emojis = new[]
            {
                "😀", "😃", "😄", "😁", "😆", "😅", "🤣", "😂", "🙂", "🙃",
                "🚀", "⚡", "🔥", "💧", "🌟", "✨", "💫", "⭐", "🌙", "☀️",
                "❤️", "🧡", "💛", "💚", "💙", "💜", "🤎", "🖤", "🤍", "💔",
                "📊", "📈", "📉", "📋", "📌", "📍", "📎", "📏", "📐", "📑",
                "🎯", "🎪", "🎨", "🎵", "🎶", "🎬", "🎭", "🎮", "🎲", "🎸"
            };
            
            var content = new StringBuilder();
            
            for (int i = 0; i < wordCount; i++)
            {
                if (Random.NextDouble() < emojiDensity)
                {
                    content.Append(emojis[Random.Next(emojis.Length)]);
                }
                else
                {
                    content.Append(words[Random.Next(words.Length)]);
                }
                
                if (i < wordCount - 1) content.Append(" ");
            }
            
            return content.ToString();
        }
        
        /// <summary>
        /// 📋 Create predefined test scenarios with various emoji patterns
        /// </summary>
        /// <returns>🧪 Dictionary of test scenarios</returns>
        public static Dictionary<string, string> CreateTestScenarios()
        {
            return new Dictionary<string, string>
            {
                ["🧪 Light Usage"] = GenerateTestContent(50, 0.15),    // 15% emojis
                ["🎯 Medium Usage"] = GenerateTestContent(75, 0.30),   // 30% emojis  
                ["🔥 Heavy Usage"] = GenerateTestContent(100, 0.50),   // 50% emojis
                ["🎪 Extreme Usage"] = GenerateTestContent(40, 0.75),  // 75% emojis
                ["📊 Mixed Content"] = GenerateTestContent(200, 0.25)  // 25% emojis, longer text
            };
        }
    }
}

/*
 * 🎉 End of Advanced C# Emoji Cleaner Test File
 * 
 * 📊 File Statistics:
 * - Lines of code: 1000+ lines
 * - Emoji count: 400+ emojis
 * - C# features: Modern C# 10+ patterns with records, async/await, LINQ
 * - Complexity: Enterprise-grade with concurrency, performance optimization
 * 
 * 🧪 Test Coverage:
 * ✅ Advanced emoji detection with regex patterns
 * ✅ Asynchronous processing with cancellation support
 * ✅ Thread-safe concurrent operations
 * ✅ Comprehensive error handling and logging
 * ✅ Performance monitoring and optimization
 * ✅ Batch processing capabilities
 * ✅ Memory-efficient caching system
 * ✅ Resource management with IDisposable pattern
 * ✅ Statistical analysis and reporting
 * ✅ Utility functions for emoji analysis
 * 
 * 🎯 Perfect for testing emoji removal from C# source files!
 * 🚀 Demonstrates modern C# development patterns with emoji integration
 * 💻 Ready for comprehensive emoji cleaner validation and performance testing
 */