#pragma once
#include <string>
#include <nlohmann/json.hpp>

class mcp_Tool_Utility
{
public:
	// 1. 纯文本响应
	static nlohmann::json make_text_result(const std::string &text)
	{
		return {
			{ "result", {
				{ "content", {
					{ { "type", "text" }, { "text", text } }
				} }
			} }
		};
	}

	// 2. 图片响应 (传入 base64 编码的图片数据)
	static nlohmann::json make_image_result(const std::string &base64Data
		, const std::string &mimeType = "image/png")
	{
		return {
			{ "result", {
				{ "content", {
					{ { "type", "image" }, { "data", base64Data }, { "mimeType", mimeType } }
				} }
			} }
		};
	}

	// 3. 图文混合响应 (文字汇报结果 + 附带 CAD 视口截图)
	static nlohmann::json make_mixed_result(const std::string &text
		, const std::string &base64Data
		, const std::string &mimeType = "image/png")
	{
		return {
			{ "result", {
				{ "content", {
					{ { "type", "text" }, { "text", text } },
					{ { "type", "image" }, { "data", base64Data }, { "mimeType", mimeType } }
				} }
			} }
		};
	}

	static nlohmann::json make_error(int code, const std::string &message)
	{
		return {
			{ "error",{
				{ "code", code },
				{ "message", message }
			} }
		};
	}
};

class mcp_Tool
{
protected:
	nlohmann::json m_config;

public:
	virtual ~mcp_Tool() = default;

	void SetConfig(const nlohmann::json &config) { m_config = config; }

	// 兜底三剑客：当 JSON 中不写这些字段时，才调用这里（均可选重载）
	virtual std::string private_name() const { return "unnamed_tool"; }

	virtual std::string private_description() const { return ""; }

	virtual nlohmann::json private_input_schema() const { return nlohmann::json::object(); }

	// 统一由框架接管 Name 的获取 (供路由字典 mcp_Tools::Register 调用)
	virtual std::string GetName() const final { return m_config.value("name", private_name()); }

	// 统一由框架接管 ToLLM 组装
	virtual nlohmann::json ToLLM() const final
	{
		nlohmann::json tool;
		tool["name"] = GetName();
		std::string desc = m_config.value("description", "");
		tool["description"] = desc.empty() ? private_description() : desc;

		if (m_config.contains("inputSchema") && !m_config["inputSchema"].empty())
		{
			tool["inputSchema"] = m_config["inputSchema"];
		}
		else
		{
			tool["inputSchema"] = private_input_schema();
		}
		return tool;
	}

	// 整个类唯一一个纯虚函数：全心全意干活！
	virtual nlohmann::json Execute(const nlohmann::json &args) = 0;
};

#define EXPORT_MCP_TOOL(ToolClass, FactoryName) \
extern "C" __declspec(dllexport) mcp_Tool* FactoryName() \
{ \
	return new ToolClass(); \
} \
extern "C" __declspec(dllexport) void Destroy_##FactoryName(mcp_Tool* pTool) \
{ \
	delete pTool; \
}