using MarketAlly.AIPlugin;
using MarketAlly.AIPlugin.Context;
using Microsoft.Extensions.Logging;
using Microsoft.Extensions.Options;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace Test.Context;

/// <summary>
/// Simplified ContextClaudeService that uses AIPluginHelper properly
/// </summary>
public class ContextClaudeService
{
	private readonly ILogger<ContextClaudeService> _logger;
	private readonly AIPluginRegistry _registry;
	private readonly Claude4Settings _settings;
	private readonly HttpClient _httpClient;
	private string _currentSessionId = "";
	private string _currentTopic = "";
	private string _currentProject = "";

	public ContextClaudeService(
		ILogger<ContextClaudeService> logger,
		AIPluginRegistry registry,
		IOptions<Claude4Settings> settings,
		HttpClient httpClient)
	{
		_logger = logger;
		_registry = registry;
		_settings = settings.Value;
		_httpClient = httpClient;
	}

	#region Web API Methods

	/// <summary>
	/// Process a single message for web API - returns Claude's response
	/// </summary>
	public async Task<string> ProcessSingleMessageAsync(string message, string topic, string projectPath, List<object>? previousMessages = null)
	{
		try
		{
			_logger.LogInformation("Processing single message for topic: {Topic}", topic);

			_currentTopic = topic;
			_currentProject = projectPath;
			_currentSessionId = Guid.NewGuid().ToString();

			// Build conversation history
			var messages = new List<object>();

			// Add system message with context
			var systemPrompt = await BuildSystemPromptWithContextAsync(topic, projectPath);
			messages.Add(new { role = "system", content = systemPrompt });

			// Add previous messages if provided
			if (previousMessages != null && previousMessages.Any())
			{
				messages.AddRange(previousMessages.TakeLast(10));
			}

			// Add current message
			messages.Add(new { role = "user", content = message });

			// Call Claude using AIPluginHelper
			var claudeResponse = await CallClaudeWithAIPluginHelperAsync(messages);

			// Auto-store important information
			await AutoStoreImportantInformationAsync(message, claudeResponse);

			return claudeResponse;
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Unexpected error processing message");
			throw new InvalidOperationException("Claude integration temporarily unavailable. Please try again later.", ex);
		}
	}

	/// <summary>
	/// Process a command for web API
	/// </summary>
	public async Task<string> ProcessCommandAsync(string command, List<string> arguments, string projectPath)
	{
		try
		{
			_currentProject = projectPath;
			var cmd = command.ToLower();

			return cmd switch
			{
				"/search" => await HandleSearchCommandAsync(arguments, projectPath),
				"/context" => await HandleContextCommandAsync(projectPath),
				"/store" => await HandleStoreCommandAsync(arguments, projectPath),
				"/project" => await HandleProjectCommandAsync(projectPath),
				"/help" => HandleHelpCommand(),
				_ => $"Unknown command: {command}. Available commands: /search, /context, /store, /project, /help"
			};
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Failed to process command: {Command}", command);
			return $"Failed to execute command '{command}'. Please try again.";
		}
	}

	/// <summary>
	/// Initialize a session and return initialization data
	/// </summary>
	public async Task<object> InitializeSessionAsync(string topic, string projectPath)
	{
		try
		{
			_currentTopic = topic;
			_currentProject = projectPath;
			_currentSessionId = Guid.NewGuid().ToString();

			var result = await _registry.CallFunctionAsync("ConversationContinuity", new Dictionary<string, object>
			{
				["action"] = "initialize",
				["topic"] = topic,
				["projectPath"] = projectPath
			});

			return new
			{
				SessionId = _currentSessionId,
				Topic = topic,
				ProjectPath = projectPath,
				StartTime = DateTime.UtcNow,
				Success = result.Success,
				RecentContext = result.Success ? result.Data : null,
				Message = result.Success ? "Session initialized with context" : "Session initialized without context"
			};
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Failed to initialize session");
			return new
			{
				SessionId = Guid.NewGuid().ToString(),
				Topic = topic,
				ProjectPath = projectPath,
				StartTime = DateTime.UtcNow,
				Success = false,
				Error = "Session initialization failed"
			};
		}
	}

	#endregion

	#region Interactive Chat Methods

	/// <summary>
	/// Interactive Claude chat mode with context management
	/// </summary>
	public async Task<string> InteractiveContextChatAsync(string topic, string projectPath)
	{
		try
		{
			Console.WriteLine("=".PadRight(60, '='));
			Console.WriteLine("CLAUDE INTERACTIVE CHAT WITH CONTEXT MANAGEMENT");
			Console.WriteLine("=".PadRight(60, '='));
			Console.WriteLine($"Topic: {topic}");
			Console.WriteLine($"Project: {projectPath}");
			Console.WriteLine();

			// Initialize session
			await InitializeSessionAsync(topic, projectPath);

			var messages = new List<object>();
			var systemPrompt = await BuildSystemPromptWithContextAsync(topic, projectPath);
			messages.Add(new { role = "system", content = systemPrompt });

			Console.WriteLine("Chat started! Type '/end' to finish.");
			Console.WriteLine();

			while (true)
			{
				Console.Write("You: ");
				var userInput = Console.ReadLine()?.Trim();

				if (string.IsNullOrEmpty(userInput)) continue;
				if (userInput == "/end") break;

				// Handle commands
				if (userInput.StartsWith("/"))
				{
					var parts = userInput.Split(' ', 2);
					var cmd = parts[0];
					var args = parts.Length > 1 ? parts[1].Split(' ').ToList() : new List<string>();

					var cmdResult = await ProcessCommandAsync(cmd, args, projectPath);
					Console.WriteLine($"[COMMAND] {cmdResult}");
					Console.WriteLine();
					continue;
				}

				// Add user message
				messages.Add(new { role = "user", content = userInput });

				try
				{
					var claudeResponse = await CallClaudeWithAIPluginHelperAsync(messages);
					Console.WriteLine($"Claude: {claudeResponse}");
					Console.WriteLine();

					// Add Claude's response
					messages.Add(new { role = "assistant", content = claudeResponse });

					// Auto-store important information
					await AutoStoreImportantInformationAsync(userInput, claudeResponse);
				}
				catch (Exception ex)
				{
					Console.WriteLine($"[ERROR] {ex.Message}");
					Console.WriteLine();
				}
			}

			return "Interactive chat session completed";
		}
		catch (Exception ex)
		{
			Console.WriteLine($"[ERROR] Interactive chat failed: {ex.Message}");
			return $"Chat session failed: {ex.Message}";
		}
	}

	#endregion

	#region Core Claude Integration Using AIPluginHelper

	/// <summary>
	/// Call Claude using the existing AIPluginHelper framework
	/// </summary>
	private async Task<string> CallClaudeWithAIPluginHelperAsync(List<object> messages)
	{
		try
		{
			// Get function definitions from registry
			var functionDefinitions = _registry.GetAllPluginSchemas();

			// Convert messages to format expected by AIPluginHelper
			var dynamicMessages = messages.Select(msg =>
			{
				var msgJson = JsonSerializer.Serialize(msg);
				var msgDict = JsonSerializer.Deserialize<Dictionary<string, object>>(msgJson);
				return new
				{
					Role = msgDict?["role"]?.ToString() ?? "user",
					Content = msgDict?["content"]?.ToString() ?? ""
				};
			});

			// Use AIPluginHelper to build request
			var requestJson = AIPluginHelper.SerializeRequestWithTools(
				AIPluginHelper.AIModel.Claude,
				dynamicMessages,
				functionDefinitions,
				_settings.DefaultModel,
				_settings.DefaultTemperature,
				_settings.DefaultMaxTokens,
				"auto"
			);

			// Send request
			var responseJson = await SendClaudeRequestAsync(requestJson);

			// Process response
			var claudeResponse = JsonSerializer.Deserialize<ClaudeApiResponse>(responseJson);
			return await ProcessClaudeResponseAsync(claudeResponse, messages);
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Claude API call failed");
			throw;
		}
	}

	/// <summary>
	/// Send request to Claude API
	/// </summary>
	private async Task<string> SendClaudeRequestAsync(string requestJson)
	{
		_httpClient.DefaultRequestHeaders.Clear();
		_httpClient.DefaultRequestHeaders.Add("x-api-key", _settings.ApiKey);
		_httpClient.DefaultRequestHeaders.Add("anthropic-version", "2023-06-01");

		var content = new StringContent(requestJson, Encoding.UTF8, "application/json");
		var response = await _httpClient.PostAsync("https://api.anthropic.com/v1/messages", content);

		if (!response.IsSuccessStatusCode)
		{
			var errorContent = await response.Content.ReadAsStringAsync();
			throw new HttpRequestException($"Claude API error: {response.StatusCode} - {errorContent}");
		}

		return await response.Content.ReadAsStringAsync();
	}

	/// <summary>
	/// Process Claude's response and handle tool calls
	/// </summary>
	private async Task<string> ProcessClaudeResponseAsync(ClaudeApiResponse claudeResponse, List<object> messages)
	{
		if (claudeResponse?.Content == null || !claudeResponse.Content.Any())
		{
			return "I apologize, but I didn't receive a proper response. Please try again.";
		}

		var textResponse = "";
		var hasToolCalls = false;

		// Process each content block
		foreach (var block in claudeResponse.Content)
		{
			if (block.Type == "text")
			{
				textResponse += block.Text;
			}
			else if (block.Type == "tool_use")
			{
				hasToolCalls = true;
				// Execute the tool call
				var toolResult = await ExecutePluginAsync(block.Name, block.Input ?? new Dictionary<string, object>());

				// For now, just append tool results to text response
				textResponse += $"\n\n[Tool Result: {toolResult}]";
			}
		}

		return textResponse.Trim();
	}

	/// <summary>
	/// Execute a plugin using the registry
	/// </summary>
	private async Task<string> ExecutePluginAsync(string? pluginName, Dictionary<string, object> parameters)
	{
		try
		{
			if (string.IsNullOrEmpty(pluginName))
				return "Invalid plugin name";

			// Convert JsonElement parameters to proper types
			var convertedParameters = ConvertJsonElementParameters(parameters);

			var result = await _registry.CallFunctionAsync(pluginName, convertedParameters);

			if (result.Success)
			{
				return JsonSerializer.Serialize(result.Data, new JsonSerializerOptions { WriteIndented = true });
			}
			else
			{
				return $"Plugin execution failed: {result.Message}";
			}
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Plugin execution failed: {PluginName}", pluginName);
			return $"Error executing {pluginName}: {ex.Message}";
		}
	}

	/// <summary>
	/// Convert JsonElement parameters to proper .NET types
	/// </summary>
	private Dictionary<string, object> ConvertJsonElementParameters(Dictionary<string, object> parameters)
	{
		var converted = new Dictionary<string, object>();

		foreach (var param in parameters)
		{
			if (param.Value is JsonElement jsonElement)
			{
				converted[param.Key] = ConvertJsonElementToObject(jsonElement);
			}
			else
			{
				converted[param.Key] = param.Value;
			}
		}

		return converted;
	}

	private object ConvertJsonElementToObject(JsonElement element)
	{
		switch (element.ValueKind)
		{
			case JsonValueKind.String:
				return element.GetString() ?? "";
			case JsonValueKind.Number:
				if (element.TryGetInt32(out int intValue))
					return intValue;
				return element.GetDouble();
			case JsonValueKind.True:
				return true;
			case JsonValueKind.False:
				return false;
			case JsonValueKind.Null:
				return null;
			case JsonValueKind.Array:
				var array = new List<object>();
				foreach (var item in element.EnumerateArray())
				{
					array.Add(ConvertJsonElementToObject(item));
				}
				return array;
			case JsonValueKind.Object:
				var dict = new Dictionary<string, object>();
				foreach (var property in element.EnumerateObject())
				{
					dict[property.Name] = ConvertJsonElementToObject(property.Value);
				}
				return dict;
			default:
				return element.GetRawText();
		}
	}

	#endregion

	#region Helper Methods

	private async Task<string> BuildSystemPromptWithContextAsync(string topic, string projectPath)
	{
		var prompt = new StringBuilder();
		prompt.AppendLine($"You are Claude, an AI assistant helping with: {topic}");
		prompt.AppendLine();
		prompt.AppendLine("You have access to context management tools for storing and retrieving information.");
		prompt.AppendLine("Use these tools to maintain conversation continuity and reference previous discussions.");

		return prompt.ToString();
	}

	private async Task AutoStoreImportantInformationAsync(string userInput, string claudeResponse)
	{
		var importantKeywords = new[] { "decision", "choose", "implement", "recommend", "solution", "approach", "decided" };

		if (importantKeywords.Any(keyword => claudeResponse.ToLower().Contains(keyword)))
		{
			try
			{
				await _registry.CallFunctionAsync("ContextStorage", new Dictionary<string, object>
				{
					["contextType"] = "insight",
					["summary"] = $"Important discussion point ({DateTime.Now:HH:mm})",
					["content"] = $"User: {userInput}\n\nClaude: {claudeResponse}",
					["priority"] = "medium",
					["tags"] = $"{_currentTopic},auto-stored,important",
					["projectPath"] = _currentProject
				});
			}
			catch (Exception ex)
			{
				_logger.LogWarning(ex, "Failed to auto-store important information");
			}
		}
	}

	#endregion

	#region Command Handlers

	private async Task<string> HandleSearchCommandAsync(List<string> arguments, string projectPath)
	{
		if (!arguments.Any())
			return "Usage: /search <query>";

		var query = string.Join(" ", arguments);
		var result = await _registry.CallFunctionAsync("ContextSearch", new Dictionary<string, object>
		{
			["query"] = query,
			["maxResults"] = 5,
			["includeContent"] = true,
			["projectPath"] = projectPath
		});

		return result.Success ? FormatSearchResults(query, result.Data) : $"Search failed: {result.Message}";
	}

	private async Task<string> HandleContextCommandAsync(string projectPath)
	{
		var result = await _registry.CallFunctionAsync("ContextRetrieval", new Dictionary<string, object>
		{
			["contextType"] = "all",
			["projectPath"] = projectPath,
			["conversationLimit"] = 5
		});

		return result.Success ? "Context retrieved successfully" : $"Failed: {result.Message}";
	}

	private async Task<string> HandleStoreCommandAsync(List<string> arguments, string projectPath)
	{
		if (!arguments.Any())
			return "Usage: /store <summary>";

		var summary = string.Join(" ", arguments);
		var result = await _registry.CallFunctionAsync("ContextStorage", new Dictionary<string, object>
		{
			["contextType"] = "conversation",
			["summary"] = summary,
			["content"] = $"Manual storage: {summary}",
			["priority"] = "medium",
			["tags"] = $"{_currentTopic},manual-store",
			["projectPath"] = projectPath
		});

		return result.Success ? $"✅ Stored: {summary}" : $"❌ Storage failed: {result.Message}";
	}

	private async Task<string> HandleProjectCommandAsync(string projectPath)
	{
		var result = await _registry.CallFunctionAsync("ConversationContinuity", new Dictionary<string, object>
		{
			["action"] = "get_project_context",
			["projectPath"] = projectPath
		});

		return result.Success ? "Project context retrieved" : $"Failed: {result.Message}";
	}

	private string HandleHelpCommand()
	{
		return @"Available Commands:
/context - Show recent context
/search <query> - Search stored context
/store <summary> - Store discussion point
/project - Show project context
/help - Show this help";
	}

	private string FormatSearchResults(string query, object? data)
	{
		return $"Search results for '{query}' - {(data != null ? "Found results" : "No results")}";
	}

	#endregion

	#region Claude API Response Models

	public class ClaudeApiResponse
	{
		[JsonPropertyName("content")]
		public List<ClaudeContentBlock> Content { get; set; } = new();
	}

	public class ClaudeContentBlock
	{
		[JsonPropertyName("type")]
		public string Type { get; set; } = "";

		[JsonPropertyName("text")]
		public string? Text { get; set; }

		[JsonPropertyName("name")]
		public string? Name { get; set; }

		[JsonPropertyName("input")]
		public Dictionary<string, object>? Input { get; set; }
	}

	#endregion

	#region Public Convenience Methods

	public async Task<bool> StoreImportantDecisionAsync(string sessionId, string userMessage, string assistantResponse, string? projectPath = null)
	{
		try
		{
			var result = await _registry.CallFunctionAsync("ContextStorage", new Dictionary<string, object>
			{
				["contextType"] = "conversation",
				["summary"] = $"Chat decision: {userMessage.Substring(0, Math.Min(50, userMessage.Length))}...",
				["content"] = $"**User:** {userMessage}\n\n**Claude:** {assistantResponse}",
				["priority"] = "medium",
				["tags"] = "chat-session,auto-stored,important-decision",
				["projectPath"] = projectPath ?? _currentProject
			});

			return result.Success;
		}
		catch (Exception ex)
		{
			_logger.LogError(ex, "Failed to store important decision");
			return false;
		}
	}

	#endregion
}

// Add Claude4Settings for your Test.Context project
public class Claude4Settings
{
	public string ApiKey { get; set; } = "";
	public string DefaultModel { get; set; } = "claude-3-5-sonnet-20241022";
	public double DefaultTemperature { get; set; } = 0.3;
	public int DefaultMaxTokens { get; set; } = 8000;
}