/* 
 * Mirai. Copyright (C) 2024 Vyn
 * This file is licensed under version 3 of the GNU General Public License (GPL-3.0-only)
 * The license can be found in the LICENSE file or at https://www.gnu.org/licenses/gpl-3.0.txt
 */

#include "TodoMd.h"

namespace mirai {

	TasksFile TodoMdFormat::readFile(const std::string& path) {
		std::ifstream file(path);
		if (!file.is_open()) {
			throw std::runtime_error("todo.txt file not found");
		}
		std::vector<TaskItem> taskItems;
		std::string line;

		if (!std::getline(file, line) || line.substr(0, 2) != "# ") {
			std::cerr << "Couldn't find the task list name" << std::endl;
		}

		std::string name = line.substr(2);
		std::string currentDate = "";

		while (std::getline(file, line)) {
			if (line.substr(0, 3) == "## ") {
				currentDate = line.substr(3);
			} else if (line.substr(0, 5) == "- [ ]" || line.substr(0, 5) == "- [X]") {
				std::string text = line.substr(5);
				trim(text);
				TaskItem taskItem = {
					.text = text,
					.state = line.substr(0, 5) == "- [X]" ? DONE : TODO,
					.date = currentDate
				};
				taskItems.push_back(taskItem);
			}
		}
		file.close();
		TasksFile tasks({
			.name = name,
			.path = path,
			.tasks = taskItems
		});
		return tasks;
	}

	void TodoMdFormat::writeFile(TasksFile& tasks) {
		std::ofstream file(tasks.getPath());
		if (!file.is_open()) {
			throw std::runtime_error("can't create todo.txt");
		}
		std::string currentDate = "";

		file << "# " << tasks.getName() << "\n";
		for (const auto& task : tasks.getTasks()) {
			if (currentDate != task->date) {
				currentDate = task->date;
				file << "\n## " << (task->date != "" ? task->date : "No date") << "\n\n";
			}
			if (task->getState() == TODO) {
				file << "- [ ] ";
			} else if (task->getState() == DONE) {
				file << "- [X] ";
			}
			file << task->getText() << '\n';
		}
		file.close();
	}

	std::string TodoMdFormat::fieldWithSpace(const std::string& field) {
		if (field.length() == 0)
			return "";
		return (field + " ");
	}
}