//
// SampleApp.cpp
//
// This sample demonstrates the Application class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#include "Poco/Util/Application.h"
#include "Poco/Util/Option.h"
#include "Poco/Util/OptionSet.h"
#include "Poco/Util/HelpFormatter.h"
#include "Poco/Util/AbstractConfiguration.h"
#include "Poco/AutoPtr.h"
#include <iostream>
#include <sstream>


using Poco::Util::Application;
using Poco::Util::Option;
using Poco::Util::OptionSet;
using Poco::Util::HelpFormatter;
using Poco::Util::AbstractConfiguration;
using Poco::Util::OptionCallback;
using Poco::AutoPtr;


class SampleApp: public Application
	/// This sample demonstrates some of the features of the Util::Application class,
	/// such as configuration file handling and command line arguments processing.
	///
	/// Try SampleApp --help (on Unix platforms) or SampleApp /help (elsewhere) for
	/// more information.
{
public:
	SampleApp(): _helpRequested(false)
	{
	}

protected:
	void initialize(Application& self)
	{
		loadConfiguration(); // load default configuration files, if present
		Application::initialize(self);
		// add your own initialization code here
	}

	void uninitialize()
	{
		// add your own uninitialization code here
		Application::uninitialize();
	}

	void reinitialize(Application& self)
	{
		Application::reinitialize(self);
		// add your own reinitialization code here
	}

	void defineOptions(OptionSet& options)
	{
		Application::defineOptions(options);

		options.addOption(
			Option("help", "h", "display help information on command line arguments")
				.required(false)
				.repeatable(false)
				.callback(OptionCallback<SampleApp>(this, &SampleApp::handleHelp)));

		options.addOption(
			Option("define", "D", "define a configuration property")
				.required(false)
				.repeatable(true)
				.argument("name=value")
				.callback(OptionCallback<SampleApp>(this, &SampleApp::handleDefine)));

		options.addOption(
			Option("config-file", "f", "load configuration data from a file")
				.required(false)
				.repeatable(true)
				.argument("file")
				.callback(OptionCallback<SampleApp>(this, &SampleApp::handleConfig)));

		options.addOption(
			Option("bind", "b", "bind option value to test.property")
				.required(false)
				.repeatable(false)
				.argument("value")
				.binding("test.property"));
	}

	void handleHelp(const std::string& name, const std::string& value)
	{
		_helpRequested = true;
		displayHelp();
		stopOptionsProcessing();
	}

	void handleDefine(const std::string& name, const std::string& value)
	{
		defineProperty(value);
	}

	void handleConfig(const std::string& name, const std::string& value)
	{
		loadConfiguration(value);
	}

	void displayHelp()
	{
		HelpFormatter helpFormatter(options());
		helpFormatter.setCommand(commandName());
		helpFormatter.setUsage("OPTIONS");
		helpFormatter.setHeader("A sample application that demonstrates some of the features of the Poco::Util::Application class.");
		helpFormatter.format(std::cout);
	}

	void defineProperty(const std::string& def)
	{
		std::string name;
		std::string value;
		std::string::size_type pos = def.find('=');
		if (pos != std::string::npos)
		{
			name.assign(def, 0, pos);
			value.assign(def, pos + 1, def.length() - pos);
		}
		else name = def;
		config().setString(name, value);
	}

	int main(const ArgVec& args)
	{
		if (!_helpRequested)
		{
			logger().information("Command line:");
			std::ostringstream ostr;
			for (const auto& arg: argv())
			{
				ostr << arg << ' ';
			}
			logger().information(ostr.str());
			logger().information("Arguments to main():");
			for (const auto& arg: argv())
			{
				logger().information(arg);
			}
			logger().information("Application properties:");
			printProperties("");
		}
		return Application::EXIT_OK;
	}

	void printProperties(const std::string& base)
	{
		auto keys = config().keys(base);
		if (keys.empty())
		{
			if (config().hasProperty(base))
			{
				std::string msg;
				msg.append(base);
				msg.append(" = ");
				msg.append(config().getString(base));
				logger().information(msg);
			}
		}
		else
		{
			for (const auto& key : keys)
			{
				std::string fullKey = base;
				if (!fullKey.empty()) fullKey += '.';
				fullKey.append(key);
				printProperties(fullKey);
			}
		}
	}

private:
	bool _helpRequested;
};


POCO_APP_MAIN(SampleApp)
