using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Collections.Generic;
using System.Linq;
[assembly: DoNotParallelize]
namespace MarketAlly.AIPlugin.Refactoring.Plugins
{
	public interface IParameterExtractor
	{
		T GetParameter<T>(IReadOnlyDictionary<string, object> parameters, string key, T defaultValue = default);
		T GetParameter<T>(IReadOnlyDictionary<string, object> parameters, string[] keys, T defaultValue = default);
		List<T> GetListParameter<T>(IReadOnlyDictionary<string, object> parameters, params string[] keys);
		int GetIntParameter(IReadOnlyDictionary<string, object> parameters, string key, int defaultValue = 0);
		double GetDoubleParameter(IReadOnlyDictionary<string, object> parameters, string key, double defaultValue = 0.0);
		bool GetBoolParameter(IReadOnlyDictionary<string, object> parameters, string key, bool defaultValue = false);
	}

	public class ParameterExtractor : IParameterExtractor
	{
		public T GetParameter<T>(IReadOnlyDictionary<string, object> parameters, string key, T defaultValue = default)
		{
			return GetParameter<T>(parameters, new[] { key }, defaultValue);
		}

		public T GetParameter<T>(IReadOnlyDictionary<string, object> parameters, string[] keys, T defaultValue = default)
		{
			if (parameters == null)
				return defaultValue;

			foreach (var key in keys)
			{
				if (parameters.TryGetValue(key, out var value) && value != null)
				{
					try
					{
						if (value is T directValue)
							return directValue;

						// Try conversion for common types
						if (typeof(T) == typeof(string))
							return (T)(object)value.ToString();

						if (typeof(T) == typeof(int) && int.TryParse(value.ToString(), out var intValue))
							return (T)(object)intValue;

						if (typeof(T) == typeof(double) && double.TryParse(value.ToString(), out var doubleValue))
							return (T)(object)doubleValue;

						if (typeof(T) == typeof(bool) && bool.TryParse(value.ToString(), out var boolValue))
							return (T)(object)boolValue;

						// Generic conversion attempt
						return (T)Convert.ChangeType(value, typeof(T));
					}
					catch
					{
						// Conversion failed, continue to next key
						continue;
					}
				}
			}

			return defaultValue;
		}

		public List<T> GetListParameter<T>(IReadOnlyDictionary<string, object> parameters, params string[] keys)
		{
			if (parameters == null)
				return new List<T>();

			foreach (var key in keys)
			{
				if (parameters.TryGetValue(key, out var value) && value != null)
				{
					try
					{
						if (value is List<T> directList)
							return directList;

						if (value is IEnumerable<object> enumerable)
						{
							var result = new List<T>();
							foreach (var item in enumerable)
							{
								if (item is T directItem)
									result.Add(directItem);
								else if (item != null)
								{
									try
									{
										var convertedItem = (T)Convert.ChangeType(item, typeof(T));
										result.Add(convertedItem);
									}
									catch
									{
										// Skip items that can't be converted
									}
								}
							}
							return result;
						}

						// Try to convert single value to list
						if (value is T singleValue)
							return new List<T> { singleValue };
					}
					catch
					{
						// Conversion failed, continue to next key
						continue;
					}
				}
			}

			return new List<T>();
		}

		public int GetIntParameter(IReadOnlyDictionary<string, object> parameters, string key, int defaultValue = 0)
		{
			return GetParameter<int>(parameters, key, defaultValue);
		}

		public double GetDoubleParameter(IReadOnlyDictionary<string, object> parameters, string key, double defaultValue = 0.0)
		{
			return GetParameter<double>(parameters, key, defaultValue);
		}

		public bool GetBoolParameter(IReadOnlyDictionary<string, object> parameters, string key, bool defaultValue = false)
		{
			return GetParameter<bool>(parameters, key, defaultValue);
		}
	}

	// Common result types
	public static class PluginResultHelpers
	{
		public static AIPluginResult Success(object data, string message = "Operation completed successfully")
		{
			return new AIPluginResult(data, message);
		}

		public static AIPluginResult Error(string message, Exception exception = null)
		{
			return new AIPluginResult(exception ?? new InvalidOperationException(message), message);
		}

		public static AIPluginResult ValidationError(string parameterName, string validationMessage)
		{
			return new AIPluginResult(new ArgumentException(validationMessage, parameterName), $"Validation failed for {parameterName}: {validationMessage}");
		}

		public static AIPluginResult FileNotFound(string filePath)
		{
			return new AIPluginResult(new FileNotFoundException($"File not found: {filePath}"), $"File not found: {filePath}");
		}

		public static AIPluginResult InvalidOperation(string operation, string reason)
		{
			return new AIPluginResult(new InvalidOperationException(reason), $"Invalid operation '{operation}': {reason}");
		}
	}

	// Common constants
	public static class PluginConstants
	{
		public const int DefaultMaxFileSize = 10 * 1024 * 1024; // 10MB
		public const int DefaultTimeout = 30000; // 30 seconds
		public const double DefaultSimilarityThreshold = 0.7;
		public const int DefaultMaxResults = 100;

		// Common parameter names
		public static class ParameterNames
		{
			public const string FilePath = "filePath";
			public const string ProjectPath = "projectPath";
			public const string ApplyChanges = "applyChanges";
			public const string CreateBackup = "createBackup";
			public const string MaxResults = "maxResults";
			public const string Timeout = "timeout";
		}

		// Common file extensions
		public static readonly HashSet<string> CSharpFileExtensions = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
		{
			".cs", ".csx"
		};

		public static readonly HashSet<string> ProjectFileExtensions = new HashSet<string>(StringComparer.OrdinalIgnoreCase)
		{
			".csproj", ".sln", ".props", ".targets"
		};
	}
}