using System.ComponentModel.DataAnnotations;

namespace MarketAlly.AIPlugin.Context.Configuration
{
	/// <summary>
	/// Configuration settings for the context management system
	/// </summary>
	public class ContextConfiguration
	{
		/// <summary>
		/// Storage path for context files
		/// </summary>
		[Required]
		public string StoragePath { get; set; } = ".context";

		/// <summary>
		/// Maximum context size in characters
		/// </summary>
		[Range(1000, 1000000)]
		public int MaxContextSize { get; set; } = 50000;

		/// <summary>
		/// Enable compression for older files
		/// </summary>
		public bool EnableCompression { get; set; } = true;

		/// <summary>
		/// Retention policy settings
		/// </summary>
		public RetentionPolicy Retention { get; set; } = new();

		/// <summary>
		/// Search configuration settings
		/// </summary>
		public SearchConfiguration Search { get; set; } = new();

		/// <summary>
		/// Performance configuration settings
		/// </summary>
		public PerformanceConfiguration Performance { get; set; } = new();

		/// <summary>
		/// Security configuration settings
		/// </summary>
		public SecurityConfiguration Security { get; set; } = new();

		/// <summary>
		/// Monitoring and observability settings
		/// </summary>
		public MonitoringConfiguration Monitoring { get; set; } = new();
	}

	/// <summary>
	/// Retention policy configuration
	/// </summary>
	public class RetentionPolicy
	{
		/// <summary>
		/// Maximum number of entries per file
		/// </summary>
		[Range(100, 10000)]
		public int MaxEntriesPerFile { get; set; } = 1000;

		/// <summary>
		/// Retention period in days
		/// </summary>
		[Range(1, 3650)]
		public int RetentionDays { get; set; } = 90;

		/// <summary>
		/// Maximum file size in bytes
		/// </summary>
		[Range(1024, 100 * 1024 * 1024)]
		public long MaxFileSizeBytes { get; set; } = 10 * 1024 * 1024; // 10MB

		/// <summary>
		/// Age in days after which files should be compressed
		/// </summary>
		[Range(1, 365)]
		public int CompressionAgeInDays { get; set; } = 30;

		/// <summary>
		/// Enable automatic cleanup of expired entries
		/// </summary>
		public bool EnableAutoCleanup { get; set; } = true;
	}

	/// <summary>
	/// Search configuration settings
	/// </summary>
	public class SearchConfiguration
	{
		/// <summary>
		/// Enable semantic search capabilities
		/// </summary>
		public bool EnableSemanticSearch { get; set; } = false;

		/// <summary>
		/// Enable fuzzy matching for searches
		/// </summary>
		public bool EnableFuzzyMatching { get; set; } = true;

		/// <summary>
		/// Fuzzy matching threshold (0.0 to 1.0)
		/// </summary>
		[Range(0.0, 1.0)]
		public double FuzzyMatchingThreshold { get; set; } = 0.7;

		/// <summary>
		/// Maximum number of search results to return
		/// </summary>
		[Range(1, 1000)]
		public int MaxSearchResults { get; set; } = 50;

		/// <summary>
		/// Enable search result caching
		/// </summary>
		public bool EnableCaching { get; set; } = true;

		/// <summary>
		/// Cache expiration time in minutes
		/// </summary>
		[Range(1, 1440)]
		public int CacheExpirationMinutes { get; set; } = 30;

		/// <summary>
		/// OpenAI API key for semantic search (if enabled)
		/// </summary>
		public string? OpenAIApiKey { get; set; }

		/// <summary>
		/// OpenAI model to use for embeddings
		/// </summary>
		public string OpenAIEmbeddingModel { get; set; } = "text-embedding-3-small";
	}

	/// <summary>
	/// Performance configuration settings
	/// </summary>
	public class PerformanceConfiguration
	{
		/// <summary>
		/// Enable streaming JSON processing for large files
		/// </summary>
		public bool EnableStreamingJson { get; set; } = true;

		/// <summary>
		/// Maximum number of entries to process concurrently
		/// </summary>
		[Range(1, 100)]
		public int MaxConcurrentOperations { get; set; } = 10;

		/// <summary>
		/// Cache size limit for search results
		/// </summary>
		[Range(100, 10000)]
		public int CacheSizeLimit { get; set; } = 1000;

		/// <summary>
		/// Cache compaction percentage when limit is reached
		/// </summary>
		[Range(0.1, 0.9)]
		public double CacheCompactionPercentage { get; set; } = 0.25;

		/// <summary>
		/// Enable parallel processing for search operations
		/// </summary>
		public bool EnableParallelProcessing { get; set; } = true;
	}

	/// <summary>
	/// Security configuration settings
	/// </summary>
	public class SecurityConfiguration
	{
		/// <summary>
		/// Enable encryption for sensitive content
		/// </summary>
		public bool EnableEncryption { get; set; } = true;

		/// <summary>
		/// Encryption key for data protection
		/// </summary>
		public string? EncryptionKey { get; set; }

		/// <summary>
		/// Enable sensitive data detection
		/// </summary>
		public bool EnableSensitiveDataDetection { get; set; } = true;

		/// <summary>
		/// Automatically encrypt detected sensitive data
		/// </summary>
		public bool AutoEncryptSensitiveData { get; set; } = true;

		/// <summary>
		/// Regular expressions for detecting sensitive data patterns
		/// </summary>
		public List<string> SensitiveDataPatterns { get; set; } = new()
		{
			@"\b[A-Za-z0-9+/]{40,}\b", // API keys
			@"\b[\w\.-]+@[\w\.-]+\.\w+\b", // Email addresses
			@"\b\d{3}-\d{2}-\d{4}\b", // SSN patterns
			@"\b(?:\d{4}[-\s]?){3}\d{4}\b", // Credit card numbers
			@"\bbearer\s+[A-Za-z0-9\-\._~\+\/]+=*\b", // Bearer tokens
			@"\bpassword[:=]\s*[^\s]+\b" // Password patterns
		};
	}

	/// <summary>
	/// Monitoring and observability configuration
	/// </summary>
	public class MonitoringConfiguration
	{
		/// <summary>
		/// Enable detailed logging
		/// </summary>
		public bool EnableDetailedLogging { get; set; } = true;

		/// <summary>
		/// Enable performance metrics collection
		/// </summary>
		public bool EnableMetrics { get; set; } = true;

		/// <summary>
		/// Enable distributed tracing
		/// </summary>
		public bool EnableTracing { get; set; } = false;

		/// <summary>
		/// Log level for context operations
		/// </summary>
		public string LogLevel { get; set; } = "Information";

		/// <summary>
		/// Enable health checks for context storage
		/// </summary>
		public bool EnableHealthChecks { get; set; } = true;

		/// <summary>
		/// Health check interval in seconds
		/// </summary>
		[Range(10, 3600)]
		public int HealthCheckIntervalSeconds { get; set; } = 60;
	}
}