proxysql/lib/Observe_Tool_Handler.cpp

#ifdef PROXYSQLGENAI

#include "proxysql.h"

#include "../deps/json/json.hpp"
using json = nlohmann::json;
#define PROXYJSON

#include "Observe_Tool_Handler.h"
#include "MCP_Thread.h"
#include "proxysql_debug.h"

Observe_Tool_Handler::Observe_Tool_Handler(MCP_Threads_Handler* handler)
	: mcp_handler(handler)
{
	pthread_mutex_init(&handler_lock, NULL);
	proxy_debug(PROXY_DEBUG_GENERIC, 3, "Observe_Tool_Handler created\n");
}

Observe_Tool_Handler::~Observe_Tool_Handler() {
	close();
	pthread_mutex_destroy(&handler_lock);
	proxy_debug(PROXY_DEBUG_GENERIC, 3, "Observe_Tool_Handler destroyed\n");
}

int Observe_Tool_Handler::init() {
	proxy_info("Observe_Tool_Handler initialized\n");
	return 0;
}

void Observe_Tool_Handler::close() {
	proxy_debug(PROXY_DEBUG_GENERIC, 2, "Observe_Tool_Handler closed\n");
}

json Observe_Tool_Handler::get_tool_list() {
	json tools = json::array();

	// Stub tools for observability
	tools.push_back(create_tool_description(
		"list_stats",
		"List all available ProxySQL statistics",
		{
			{"type", "object"},
			{"properties", {
				{"filter", {
					{"type", "string"},
					{"description", "Filter pattern for stat names"}
				}}
			}}
		}
	));

	tools.push_back(create_tool_description(
		"get_stats",
		"Get specific statistics by name",
		{
			{"type", "object"},
			{"properties", {
				{"stat_names", {
					{"type", "array"},
					{"description", "Array of stat names to retrieve"}
				}}
			}},
			{"required", {"stat_names"}}
		}
	));

	tools.push_back(create_tool_description(
		"show_connections",
		"Show active connection information",
		{
			{"type", "object"},
			{"properties", {}}
		}
	));

	tools.push_back(create_tool_description(
		"show_queries",
		"Show query execution statistics",
		{
			{"type", "object"},
			{"properties", {
				{"limit", {
					{"type", "integer"},
					{"description", "Maximum number of queries to return"}
				}}
			}}
		}
	));

	tools.push_back(create_tool_description(
		"get_health",
		"Get ProxySQL health check status",
		{
			{"type", "object"},
			{"properties", {}}
		}
	));

	tools.push_back(create_tool_description(
		"show_metrics",
		"Show performance metrics",
		{
			{"type", "object"},
			{"properties", {
				{"category", {
					{"type", "string"},
					{"enum", {"query", "connection", "cache", "all"}},
					{"description", "Metrics category to show"}
				}}
			}}
		}
	));

	json result;
	result["tools"] = tools;
	return result;
}

json Observe_Tool_Handler::get_tool_description(const std::string& tool_name) {
	json tools_list = get_tool_list();
	for (const auto& tool : tools_list["tools"]) {
		if (tool["name"] == tool_name) {
			return tool;
		}
	}
	return create_error_response("Tool not found: " + tool_name);
}

json Observe_Tool_Handler::execute_tool(const std::string& tool_name, const json& arguments) {
	pthread_mutex_lock(&handler_lock);

	json result;

	// Stub implementation - returns placeholder responses
	if (tool_name == "list_stats") {
		std::string filter = arguments.value("filter", "");
		result = create_success_response(json{
			{"message", "list_stats functionality to be implemented"},
			{"filter", filter},
			{"stats", json::array()}
		});
	} else if (tool_name == "get_stats") {
		json stat_names = arguments.value("stat_names", json::array());
		result = create_success_response(json{
			{"message", "get_stats functionality to be implemented"},
			{"stats", json::object()}
		});
	} else if (tool_name == "show_connections") {
		result = create_success_response(json{
			{"message", "show_connections functionality to be implemented"},
			{"connections", json::array()}
		});
	} else if (tool_name == "show_queries") {
		int limit = arguments.value("limit", 100);
		result = create_success_response(json{
			{"message", "show_queries functionality to be implemented"},
			{"queries", json::array()},
			{"limit", limit}
		});
	} else if (tool_name == "get_health") {
		result = create_success_response(json{
			{"message", "get_health functionality to be implemented"},
			{"health", "unknown"}
		});
	} else if (tool_name == "show_metrics") {
		std::string category = arguments.value("category", "all");
		result = create_success_response(json{
			{"message", "show_metrics functionality to be implemented"},
			{"category", category},
			{"metrics", json::object()}
		});
	} else {
		result = create_error_response("Unknown tool: " + tool_name);
	}

	pthread_mutex_unlock(&handler_lock);
	return result;
}

#endif /* PROXYSQLGENAI */