#include "bob.h"

#include <algorithm>
#include <locale>
#include <string>

namespace bob {


using namespace std;

namespace {

void trim_spaces(string &str)
{
    str.erase(remove_if(str.begin(), str.end(),
                        [](char c){return isspace(static_cast<unsigned char>(c));}),
              str.end());
}

string to_uppercase(const string &str)
{
    string result = str;
    for (auto & c: result)
        c = toupper(c);

    return result;
}

bool has_alpha(const string &str)
{
    return find_if(str.begin(), str.end(),
            [](char c){return isalpha(static_cast<unsigned char>(c));}) != str.end();
}

}

const char * hey(const char input[])
{

    string str(input);
    trim_spaces(str);

    if (str.empty())
        return "Fine. Be that way!";

    if (has_alpha(str) && str == to_uppercase(str))
        return "Whoa, chill out!";

    if ('?' == str.back())
        return "Sure.";

    return "Whatever.";
}

}