/*
This file is part of Telegram Desktop,
the official desktop version of Telegram messaging app, see https://telegram.org

Telegram Desktop is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

It is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

In addition, as a special exception, the copyright holders give permission
to link the code of portions of this program with the OpenSSL library.

Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
Copyright (c) 2014-2016 John Preston, https://desktop.telegram.org
*/
#include "codegen/style/processor.h"

#include <QtCore/QDir>
#include <QtCore/QFileInfo>
#include "codegen/common/cpp_file.h"
#include "codegen/style/parsed_file.h"
#include "codegen/style/generator.h"
#include "codegen/style/sprite_generator.h"

namespace codegen {
namespace style {
namespace {

constexpr int kErrorCantWritePath = 821;

QString destFileBaseName(const structure::Module &module) {
	return "style_" + QFileInfo(module.filepath()).baseName();
}

} // namespace

Processor::Processor(const Options &options)
: parser_(std::make_unique<ParsedFile>(options))
, options_(options) {
}

int Processor::launch() {
	if (!parser_->read()) {
		return -1;
	}

	auto module = parser_->getResult();
	if (options_.rebuildDependencies) {
		bool result = module->enumIncludes([this](const structure::Module &included) -> bool {
			return write(included);
		});
		if (!result) {
			return -1;
		}
	} else if (!write(*module)) {
		return -1;
	}

	return 0;
}

bool Processor::write(const structure::Module &module) const {
	bool forceReGenerate = false;
	bool onlyStyles = options_.skipSprites;
	bool onlySprites = options_.skipStyles;
	if (!onlyStyles) {
		SpriteGenerator spriteGenerator(module, forceReGenerate);
		if (!spriteGenerator.writeSprites()) {
			return false;
		}
	}
	if (!onlySprites) {
		QDir dir(options_.outputPath);
		if (!dir.mkpath(".")) {
			common::logError(kErrorCantWritePath, "Command Line") << "can not open path for writing: " << dir.absolutePath().toStdString();
			return false;
		}

		QFileInfo srcFile(module.filepath());
		QString dstFilePath = dir.absolutePath() + '/' + destFileBaseName(module);

		common::ProjectInfo project = {
			"codegen_style",
			srcFile.fileName(),
			"stdafx.h",
			forceReGenerate
		};

		Generator generator(module, dstFilePath, project);
		if (!generator.writeHeader()) {
			return false;
		}
		if (!generator.writeSource()) {
			return false;
		}
	}
	return true;
}

Processor::~Processor() = default;

} // namespace style
} // namespace codegen