/**
 * Copyright 2015 (c) Anna Schumaker.
 */
#include <core/string.h>
#include <sstream>

#define O_MINUTES (60)
#define O_HOURS   (60 * O_MINUTES)
#define O_DAYS    (24 * O_HOURS)

const std::string string :: utos(unsigned int u)
{
	std::stringstream ss;
	ss << u;
	return ss.str();
}

const std::string string :: sec2str(unsigned int sec)
{
	std::stringstream ss;
	unsigned int minutes = sec / 60;
	unsigned int seconds = sec % 60;

	ss << minutes << ":";
	if (seconds < 10)
		ss << "0";
	ss << seconds;
	return ss.str();
}

static const std::string _time_detail(unsigned int value,
				      unsigned int remaining,
				      const std::string &field)
{
	std::string res;

	if (value > 0) {
		res += string :: utos(value) + " " + field;
		if (value > 1)
			res += "s";
		if (remaining > 0)
			res += ", ";
	}
	return res;
}

const std::string string :: sec2str_detailed(unsigned int sec)
{
	std::string res;
	unsigned int factor[3] = { O_DAYS, O_HOURS, O_MINUTES };
	std::string   field[3] = { "day",  "hour",  "minute" };
	unsigned int val;

	for (unsigned int i = 0; i < 3; i++) {
		val  = sec / factor[i];
		sec %= factor[i];
		res += _time_detail(val, sec, field[i]);
	}

	res += _time_detail(sec, 0, "second");
	return res;
}

static char _to_lower(char c)
{
	if ((c >= 'a') && (c <= 'z'))
		return c;
	if ((c >= '0') && (c <= '9'))
		return c;
	if ((c >= 'A') && (c <= 'Z'))
		return c + ('a' - 'A');

	switch (c) {
	case '\\':
	case '/':
	case ',':
	case ';':
	case '(':
	case ')':
	case '_':
	case '-':
	case '~':
	case '+':
	case '"':
	case ' ':
	case '	':
		return ' ';
	default:
		return 0;
	}
}

const std::string string :: lowercase(const std::string &str)
{
	std::string ret;
	char c, last = ' ';

	for (unsigned int i = 0; i < str.size(); i++) {
		c = _to_lower(str[i]);

		if (c > 0) {
			if ((c != ' ') || (last != ' '))
				ret += c;
			last = c;
		}
	}

	if (ret[ret.size() - 1] == ' ')
		return ret.substr(0, ret.size() - 1);
	return ret;
}