/*
 * W1TemperatureSensor.cc
 *
 *  Created on: Oct 20, 2010
 *      Author: lamikr
 */
#include <fstream>
#include <iostream>
#include <sstream>
#include <iomanip>

#include "W1Util.hh"
#include "W1TemperatureSensor.hh"

#include <plp/log.h>

using namespace std;
using namespace w1;

template <class NumberDataType>
bool string_to_number(NumberDataType& result,
                 const std::string& string_param,
                 std::ios_base& (*format)(std::ios_base&))
{
	std::istringstream iss(string_param);
	return !(iss >> format >> result).fail();
}

string convert_celcius_value_to_three_digits(string raw_value) {
	string 	ret_val;
	int	int_val;
	bool	suc_flg;
	double	dbl_val;

	suc_flg	= string_to_number<double>(dbl_val, raw_value, dec);
	if (suc_flg == true) {
		dbl_val	= dbl_val / 1000;
		std::ostringstream out;
		out << fixed << setprecision(3) << dbl_val;
		ret_val	= out.str();
	}
	else {
		ret_val	= raw_value;
	}
	return ret_val;
}

W1TemperatureSensor::W1TemperatureSensor(dirent *direntry,
				int family_code_param,
				string id_param): W1Device(direntry, family_code_param, id_param) {
	log_debug("trying to open file: %s\n", slave_file.c_str());
	ifstream ifs(slave_file.c_str());
	if (ifs.is_open() == false) {
		string text;

		text	= get_time() + ": device type = " + get_devicetype_name() + ", id = " + id + ", could not read file: " + slave_file + "\n";
		log_debug(text.c_str());
		log_debug("verify that you have w1_therm kernel module loaded.\n");
		ifs.close();
	}
}

W1TemperatureSensor::~W1TemperatureSensor() {
}

bool W1TemperatureSensor::is_supported_family_code(int family_code) {
	bool	ret_val;

	ret_val	= false;
	switch(family_code) {
		case 0x10:
		case 0x28:
			ret_val	= true;
			break;
	}
	return ret_val;
}

string W1TemperatureSensor::get_raw_value() {
	string 		temp;
	string		ret_val;
	string		last_line;
	int		pos;
	int		length;
	string		formatted_data;
	int		int_value;

	ret_val	= "<could not read>";
	ifstream ifs(slave_file.c_str());
	if (ifs.is_open() == true) {
		while(getline(ifs, temp)) {
			if (temp.length() > 0) {
				last_line	= temp;
			}
		}
		ifs.close();
		length	= last_line.length();
		if (length > 0) {
			pos	= last_line.find("t=");
			if ((pos >= 0) &&
				(pos + 2 < length)) {
				ret_val	= last_line.substr(pos + 2);
			}
		}
	}
	ret_val	= convert_celcius_value_to_three_digits(ret_val);
	return ret_val;
}

string W1TemperatureSensor::get_unit() {
	return "C";
}

string W1TemperatureSensor::get_devicetype_name() {
	return "Temperature Sensor";
}