#include "XNModelGen.h"
#include <sqlite3.h>
#include <stdexcept>
#include <filesystem>
#include <cstdlib>
#include <fstream>
#include <algorithm>
#include <nlohmann/json.hpp>

using json	 = nlohmann::json;
namespace fs = std::filesystem;

XNModelGen::XNModelGen()
{
}

XNModelGen::~XNModelGen()
{
}

int XNModelGen::Initialize(const std::string &className, const std::string &version,
						   const std::string &planeName, std::string &errorMsg)
{
	std::string dbPath = GetXNCorePath() + "/database/XNSim.db";
	sqlite3 *db;
	int rc = sqlite3_open(dbPath.c_str(), &db);
	if (rc != SQLITE_OK) {
		errorMsg = "无法打开数据库: " + std::string(sqlite3_errmsg(db));
		return -1;
	}

	std::string sql =
		"SELECT * FROM XNModelsVersion WHERE ClassName = ? AND Version = ? AND PlaneName = ?";
	sqlite3_stmt *stmt;
	rc = sqlite3_prepare_v2(db, sql.c_str(), -1, &stmt, nullptr);
	if (rc != SQLITE_OK) {
		errorMsg = "准备XNModelsVersion表SQL语句失败: " + std::string(sqlite3_errmsg(db));
		sqlite3_close(db);
		return -1;
	}

	// 绑定参数
	sqlite3_bind_text(stmt, 1, className.c_str(), -1, SQLITE_STATIC);
	sqlite3_bind_text(stmt, 2, version.c_str(), -1, SQLITE_STATIC);
	sqlite3_bind_text(stmt, 3, planeName.c_str(), -1, SQLITE_STATIC);

	// 执行查询
	rc = sqlite3_step(stmt);
	if (rc == SQLITE_ROW) {
		// 读取数据到成员变量
		m_planeName		  = (const char *)sqlite3_column_text(stmt, 1);	 // PlaneName
		m_className		  = (const char *)sqlite3_column_text(stmt, 2);	 // ClassName
		m_version		  = (const char *)sqlite3_column_text(stmt, 3);	 // Version
		m_confID		  = (const char *)sqlite3_column_text(stmt, 4);	 // ConfID
		m_name			  = (const char *)sqlite3_column_text(stmt, 5);	 // Name
		m_author		  = (const char *)sqlite3_column_text(stmt, 6);	 // Author
		m_description	  = (const char *)sqlite3_column_text(stmt, 7);	 // Description
		m_createTime	  = (const char *)sqlite3_column_text(stmt, 8);	 // CreateTime
		m_changeTime	  = (const char *)sqlite3_column_text(stmt, 9);	 // ChangeTime
		m_runFreq		  = (const char *)sqlite3_column_text(stmt, 10); // RunFreq
		m_runNode		  = (const char *)sqlite3_column_text(stmt, 11); // RunNode
		m_priority		  = (const char *)sqlite3_column_text(stmt, 12); // Priority
		m_dataPackagePath = (const char *)sqlite3_column_text(stmt, 13); // DataPackagePath
		m_dataPackageName = (const char *)sqlite3_column_text(stmt, 14); // DataPackageName
		m_dataPackageHeaderName =
			(const char *)sqlite3_column_text(stmt, 15); // DataPackageHeaderName
		m_dataPackageEntryPoint =
			(const char *)sqlite3_column_text(stmt, 16); // DataPackageEntryPoint
		m_dataPackageInterfaceName =
			(const char *)sqlite3_column_text(stmt, 17); // DataPackageInterfaceName
		std::string inputStruct = (const char *)sqlite3_column_text(stmt, 18); // InputStructName
		ParseStructName(inputStruct, m_inputStructName, m_inputStructName_Interface);
		std::string outputStruct = (const char *)sqlite3_column_text(stmt, 19); // OutputStructName
		ParseStructName(outputStruct, m_outputStructName, m_outputStructName_Interface);
		std::string heartStruct = (const char *)sqlite3_column_text(stmt, 20); // HeartStructName
		ParseStructName(outputStruct, m_heartStructName, m_heartStructName_Interface);
		// TODO cmdList暂不读取
	} else if (rc == SQLITE_DONE) {
		// 没有找到数据
		errorMsg = "未找到匹配的XNModelsVersion记录";
		sqlite3_finalize(stmt);
		sqlite3_close(db);
		return -2;
	} else {
		// 查询出错
		errorMsg = "查询XNModelsVersion表执行失败: " + std::string(sqlite3_errmsg(db));
		sqlite3_finalize(stmt);
		sqlite3_close(db);
		return -3;
	}

	sqlite3_finalize(stmt);

	// 根据m_confID查询Configuration表
	if (!m_confID.empty()) {
		std::string confSql = "SELECT ConfName FROM Configuration WHERE ConfID = ?";
		sqlite3_stmt *confStmt;
		rc = sqlite3_prepare_v2(db, confSql.c_str(), -1, &confStmt, nullptr);
		if (rc != SQLITE_OK) {
			errorMsg = "准备Configuration表SQL语句失败: " + std::string(sqlite3_errmsg(db));
			sqlite3_close(db);
			return -4;
		}

		// 绑定参数
		sqlite3_bind_text(confStmt, 1, m_confID.c_str(), -1, SQLITE_STATIC);

		// 执行查询
		rc = sqlite3_step(confStmt);
		if (rc == SQLITE_ROW) {
			// 读取Configuration表数据
			m_confName = (const char *)sqlite3_column_text(confStmt, 0); // ConfName
		} else if (rc == SQLITE_DONE) {
			// 没有找到Configuration记录
			errorMsg = "未找到匹配的Configuration记录,ConfID: " + m_confID;
			sqlite3_finalize(confStmt);
			sqlite3_close(db);
			return -5;
		} else {
			// Configuration查询出错
			errorMsg = "查询Configuration表执行失败: " + std::string(sqlite3_errmsg(db));
			sqlite3_finalize(confStmt);
			sqlite3_close(db);
			return -6;
		}

		sqlite3_finalize(confStmt);
	}

	sqlite3_close(db);

	//目录组装
	if (m_confName.empty()) {
		errorMsg = "Configuration表ConfName为空";
		return -7;
	}
	m_workPath	 = GetXNCorePath() + "/Configuration/" + m_confName;
	m_modelsPath = m_workPath + "/Models";
	m_codePath	 = m_workPath + "/ModelProjects/" + className + "_" + version;

	m_hasDataPackage = false;
	if (!m_dataPackagePath.empty() && !m_dataPackageHeaderName.empty()
		&& !m_dataPackageInterfaceName.empty() && !m_dataPackageEntryPoint.empty()) {
		m_hasDataPackage = true;
	}

	return 0;
}

int XNModelGen::GenerateCode(std::string &errorMsg)
{
	// 检查代码目录是否存在，不存在则创建
	if (!fs::exists(m_codePath)) {
		try {
			fs::create_directories(m_codePath);
		} catch (const fs::filesystem_error &e) {
			errorMsg = "创建代码目录失败: " + std::string(e.what());
			return -1;
		}
	}

	bool ret = GenerateHeaderFile();

	if (!ret) {
		errorMsg = "生成头文件失败";
		return -2;
	}

	ret = GenerateSourceFile();

	if (!ret) {
		errorMsg = "生成源文件失败";
		return -3;
	}

	ret = GenerateConfigFile();
	if (!ret) {
		errorMsg = "生成配置文件失败";
		return -4;
	}

	ret = GenerateCMakeLists();
	if (!ret) {
		errorMsg = "生成CMakeLists.txt失败";
		return -5;
	}

	return 0;
}

bool XNModelGen::GenerateHeaderFile()
{
	std::string globalHeaderPath = m_codePath + "/" + m_className + "_global.h";
	std::ofstream globalHeaderFile(globalHeaderPath);
	if (!globalHeaderFile.is_open()) {
		return false;
	}
	std::string upperClassName = UpperCase(m_className);

	// 导入导出定义文件
	globalHeaderFile << "#ifndef " << upperClassName << "_GLOBAL_H" << std::endl;
	globalHeaderFile << "#define " << upperClassName << "_GLOBAL_H" << std::endl;
	globalHeaderFile << std::endl;
	globalHeaderFile << "#if defined(" << upperClassName << "_LIBRARY)" << std::endl;
	globalHeaderFile << "#define " << upperClassName
					 << "_EXPORT __attribute__((visibility(\"default\")))" << std::endl;
	globalHeaderFile << "#else" << std::endl;
	globalHeaderFile << "#define " << upperClassName
					 << "_EXPORT __attribute__((visibility(\"default\")))" << std::endl;
	globalHeaderFile << "#endif" << std::endl;
	globalHeaderFile << std::endl;
	globalHeaderFile << "#endif // " << upperClassName << "_GLOBAL_H" << std::endl;
	globalHeaderFile << std::endl;
	globalHeaderFile.close();

	// 模型头文件
	std::string headerPath = m_codePath + "/" + m_className + ".h";
	std::ofstream headerFile(headerPath);
	if (!headerFile.is_open()) {
		return false;
	}
	headerFile << "#pragma once" << std::endl;
	headerFile << std::endl;
	headerFile << "#include \"" << m_className << "_global.h\"" << std::endl;
	headerFile << "#include <XNCore/XNModelObject.h>" << std::endl;
	headerFile << std::endl;
	headerFile << "struct " << m_className << "Private;" << std::endl;
	headerFile << std::endl;
	headerFile << "class " << upperClassName << "_EXPORT " << m_className
			   << " : public XNModelObject" << std::endl;
	headerFile << "{" << std::endl;
	headerFile << "XN_METATYPE(" << m_className << ", XNModelObject)" << std::endl;
	headerFile << "XN_DECLARE_PRIVATE(" << m_className << ")" << std::endl;
	headerFile << "public:" << std::endl;
	headerFile << "    " << m_className << "();" << std::endl;
	headerFile << "    virtual ~" << m_className << "();" << std::endl;
	headerFile << std::endl;
	headerFile << "protected:" << std::endl;
	headerFile << "    " << m_className << "(PrivateType *p);" << std::endl;
	headerFile << std::endl;
	headerFile << "public:" << std::endl;
	headerFile << "    virtual void Initialize() override;" << std::endl;
	headerFile << "    virtual void PrepareForExecute() override;" << std::endl;
	headerFile << "    virtual void StepUpdate() override;" << std::endl;
	headerFile << std::endl;
	headerFile << "protected:" << std::endl;
	headerFile << "    void InitializeData();" << std::endl;
	headerFile << "    void ReleaseData();" << std::endl;
	headerFile << "};" << std::endl;
	headerFile << std::endl;
	headerFile << "XNCLASS_PTR_DECLARE(" << m_className << ")" << std::endl;
	headerFile << std::endl;
	headerFile.close();

	// 私有结构体头文件
	std::string pHeaderPath = m_codePath + "/" + m_className + "_p.h";
	std::ofstream pHeaderFile(pHeaderPath);
	if (!pHeaderFile.is_open()) {
		return false;
	}

	pHeaderFile << "#pragma once" << std::endl;
	pHeaderFile << std::endl;
	pHeaderFile << "#include <XNCore/XNModelObject_p.h>";
	if (m_hasDataPackage) {
		pHeaderFile << "#include \"" << m_workPath << "/Packages/" << m_dataPackagePath << "/"
					<< m_dataPackageHeaderName << "\"" << std::endl;
	}
	pHeaderFile << "#include \"" << m_workPath << "/IDL/" << m_confName << "_Interface.h\""
				<< std::endl;
	pHeaderFile << std::endl;
	if (m_hasDataPackage) {
		pHeaderFile << "using InterfaceType = " << m_dataPackageInterfaceName << ";" << std::endl;
		pHeaderFile << "typedef void (*FunctionType)(InterfaceType *);" << std::endl;
		pHeaderFile << std::endl;
	}
	pHeaderFile << "struct " << m_className << "Private : public XNModelObjectPrivate{"
				<< std::endl;
	if (m_hasDataPackage) {
		pHeaderFile << "    FunctionType _fun = nullptr;" << std::endl;
		pHeaderFile << "    InterfaceType _data;" << std::endl;
		pHeaderFile << "    std::string _entryPointName = \"" << m_dataPackageEntryPoint << "\";"
					<< std::endl;
	}
	pHeaderFile << "std::mutex _mutex" << std::endl;
	if (!m_inputStructName_Interface.empty()) {
		pHeaderFile << "    " << m_inputStructName_Interface << "_Interface _inputInterface;"
					<< std::endl;
	}
	if (!m_outputStructName_Interface.empty()) {
		pHeaderFile << "    " << m_outputStructName_Interface << "_Interface _outputInterface;"
					<< std::endl;
	}
	if (!m_heartStructName_Interface.empty()) {
		pHeaderFile << "    " << m_heartStructName_Interface << "_Interface _heartbeatInterface;"
					<< std::endl;
	}
	pHeaderFile << "};" << std::endl;
	pHeaderFile << std::endl;
	pHeaderFile.close();

	return true;
}

bool XNModelGen::GenerateSourceFile()
{
	// 源文件
	std::string sourcePath = m_codePath + "/" + m_className + ".cpp";
	std::ofstream sourceFile(sourcePath);
	if (!sourceFile.is_open()) {
		return false;
	}
	sourceFile << "#include \"" << m_className << ".h\"" << std::endl;
	sourceFile << "#include \"" << m_className << "_p.h\"" << std::endl;
	sourceFile << "#include <XNCore/XNModelManager.h>" << std::endl;
	sourceFile << std::endl;
	sourceFile << "XN_MODEL_INITIALIZE(" << m_className << ")" << std::endl;
	sourceFile << std::endl;
	sourceFile << m_className << "::" << m_className << "() : XNModelObject(" << m_className
			   << "new " << m_className << "Private())" << std::endl;
	sourceFile << "{" << std::endl;
	sourceFile << "}" << std::endl;
	sourceFile << std::endl;
	sourceFile << m_className << "::~" << m_className << "() {" << std::endl;
	sourceFile << "}" << std::endl;
	sourceFile << std::endl;
	sourceFile << m_className << "::" << m_className << "(PrivateType *p) : XNModelObject(p)"
			   << std::endl;
	sourceFile << "{" << std::endl;
	sourceFile << "}" << std::endl;
	sourceFile << std::endl;
	sourceFile << "void " << m_className << "::Initialize() {" << std::endl;
	sourceFile << "    T_D();" << std::endl;
	sourceFile << "    SuperType::Initialize();" << std::endl;
	if (m_hasDataPackage) {
		sourceFile << "    if (d->_dynamicLib) {" << std::endl;
		sourceFile
			<< "        d->_fun = (FunctionType)dlsym(d->_dynamicLib, d->_entryPointName.c_str());"
			<< std::endl;
		sourceFile << "        if (!d->_fun) {" << std::endl;
		sourceFile << "            LOG_WARNING(\"Failed to resolve " << m_dataPackageEntryPoint
				   << "\");" << std::endl;
		sourceFile << "        }" << std::endl;
		sourceFile << "    }" << std::endl;
	}
	sourceFile << " /* 在这里进行其它初始化 */" << std::endl;
	sourceFile << "}" << std::endl;
	sourceFile << std::endl;
	sourceFile << "void " << m_className << "::PrepareForExecute() {" << std::endl;
	sourceFile << "    T_D();" << std::endl;
	sourceFile << "    SuperType::PrepareForExecute();" << std::endl;
	sourceFile << "    InitializeData();" << std::endl;
	if (!m_inputStructName_Interface.empty()) {
		sourceFile << "    d->_inputInterface.Initialize(GetFramework(), GetUniqueId(), 1);"
				   << std::endl;
	}
	if (!m_outputStructName_Interface.empty()) {
		sourceFile << "    d->_outputInterface.Initialize(GetFramework(), GetUniqueId(), 2);"
				   << std::endl;
	}
	if (!m_heartStructName_Interface.empty()) {
		sourceFile << "    d->_heartbeatInterface.Initialize(GetFramework(), GetUniqueId(), 2);"
				   << std::endl;
	}
	sourceFile << " /* 在这里进行其它运行前准备工作 */" << std::endl;
	sourceFile << "}" << std::endl;
	sourceFile << std::endl;
	sourceFile << "void " << m_className << "::StepUpdate() {" << std::endl;
	sourceFile << "    T_D();" << std::endl;
	sourceFile << "    SuperType::StepUpdate();" << std::endl;
	if (m_hasDataPackage) {
		sourceFile << "    if(d->_fun){" << std::endl;
		if (!m_inputStructName_Interface.empty() && !m_inputStructName.empty()) {
			sourceFile << "        d->_inputInterface.getData(&d->_data." << m_inputStructName
					   << ");" << std::endl;
		}
		sourceFile << "        d->_fun(&d->_data);" << std::endl;
		if (!m_outputStructName_Interface.empty() && !m_outputStructName.empty()) {
			sourceFile << "        d->_outputInterface.setData(&d->_data." << m_outputStructName
					   << ");" << std::endl;
		}
		// 这里只适用于本体模型
		if (!m_heartStructName_Interface.empty() && !m_heartStructName.empty()
			&& m_heartStructName == m_dataPackageInterfaceName) {
			sourceFile << "        d->_heartbeatInterface.setData(&d->_data);" << std::endl;
		}
		sourceFile << "    }" << std::endl;
	}
	sourceFile << " /* 在这里进行其它运行时计算 */" << std::endl;
	sourceFile << "}" << std::endl;
	sourceFile << std::endl;

	return true;
}

bool XNModelGen::GenerateConfigFile()
{
	return true;
}

bool XNModelGen::GenerateCMakeLists()
{
	return true;
}

std::string XNModelGen::GetXNCorePath()
{
	const char *env_value = std::getenv("XNCore");
	return env_value ? env_value : "";
}

std::string XNModelGen::UpperCase(const std::string &str)
{
	std::string result = str;
	std::transform(result.begin(), result.end(), result.begin(), ::toupper);
	return result;
}

void XNModelGen::ParseStructName(const std::string &str, std::string &structName,
								 std::string &interfaceName)
{
	try {
		json j = json::parse(str);
		// 遍历JSON对象，第一个键作为structName，第一个值作为interfaceName
		if (!j.empty() && j.is_object()) {
			auto it = j.begin();
			if (it != j.end()) {
				structName = it.key();
				if (it.value().is_string()) {
					interfaceName = it.value();
				}
			}
		}
	} catch (const json::exception &e) {
		// JSON解析失败，将整个字符串作为structName
		structName	  = "";
		interfaceName = "";
	}
}