#include "AdventHelpers/InputFileHelper.h"

#include <fstream>
#include <string>
#include <iostream>

namespace AdventHelpers {
	// Opens file, reads each line into mLines vector.  Returns null on error.
	InputFileHelper* InputFileHelper::create(const char* filename) {
		InputFileHelper* inputFileHelper = nullptr;
		std::ifstream file(filename);

		if (file.is_open()) {
			inputFileHelper = new InputFileHelper();

			std::string line;
			while (std::getline(file, line)) {
				inputFileHelper->mLines.push_back(line);
			}

			// Clean up
			file.close();
		}
		else {
			std::cerr << "Error: Could not open file " << filename << std::endl;
		}

		return inputFileHelper;
	}

	const char* InputFileHelper::getLine(size_t index) {
		return mLines[index].c_str();
	}

	void InputFileHelper::destroy(InputFileHelper* inputFileHelper) {
		if (inputFileHelper) {
			delete inputFileHelper;
		} else {
			std::cerr << "Warning: Attempted to destroy a null InputFileHelper pointer." << std::endl;
		}
	}
} // namespace AdventHelper