/*
 * © Copyright 2014 – Urheberrechtshinweis
 * Alle Rechte vorbehalten / All Rights Reserved
 *
 * Programmcode ist urheberrechtlich geschuetzt.
 * Das Urheberrecht liegt, soweit nicht ausdruecklich anders gekennzeichnet, bei Frank Ebner.
 * Keine Verwendung ohne explizite Genehmigung.
 * (vgl. § 106 ff UrhG / § 97 UrhG)
 */

#ifndef CSV_H
#define CSV_H

#include <vector>
#include <string>
#include <fstream>
#include "../misc/Debug.h"
#include "../Exception.h"

class CSV {

	static constexpr const char* NAME = "CSV";

public:

	/** one column within the CSV */
	struct Col {
		std::string data;
		Col(const std::string& data) : data(data) {;}
		const std::string& asString() const {return data;}
		int asInt() const {return std::stoi(data);}
		long asLong() const {return std::stol(data);}
		double asDouble() const {return std::stod(data);}
	};

	/** one row within the CSV */
	struct Row : std::vector<Col> {

	};

	/** one csv document */
	struct Doc : std::vector<Row> {

	};


	class Reader {

	private:

		const char sep;

	public:

		/** ctor */
		Reader(const char sep) : sep(sep) {

		}

		/** read the given csv file */
		Doc read(const std::string& file) {

			Log::add(NAME, "reading file: " + file);

			Doc doc;

			std::ifstream inp(file.c_str());

			// sanity check
			if (!inp) {
				throw Exception("failed to open file: " + file);
			}

			int rowCnt = 0;
			std::string line;

			// read all lines within the CSV
			while(std::getline(inp, line)) {

				++rowCnt;

				// split
				Row row;
				std::stringstream ss(line);
				std::string tmp;
				while(getline(ss, tmp, sep)){
					row.push_back(Col(tmp));
				}

				// apend row
				doc.push_back(row);

			}

			Log::add(NAME, "got " + std::to_string(rowCnt) + " rows");

			return doc;

		}

	};

};

#endif // CSV_H