/*
The "inih" library is distributed under the New BSD license:

Copyright (c) 2009, Ben Hoyt
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
    * Redistributions of source code must retain the above copyright
      notice, this list of conditions and the following disclaimer.
    * Redistributions in binary form must reproduce the above copyright
      notice, this list of conditions and the following disclaimer in the
      documentation and/or other materials provided with the distribution.
    * Neither the name of Ben Hoyt nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY BEN HOYT ''AS IS'' AND ANY
EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL BEN HOYT BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/

#include <algorithm>
#include <cctype>
#include <cstdlib>
#include "ini.h"
#include "INIReader.h"

using std::string;

INIReader::INIReader(const string& filename)
{
    _error = ini_parse(filename.c_str(), ValueHandler, this);
}

int INIReader::ParseError() const
{
    return _error;
}

string INIReader::Get(const string& section, const string& name, const string& default_value) const
{
    string key = MakeKey(section, name);
    // Use _values.find() here instead of _values.at() to support pre C++11 compilers
    return _values.count(key) ? _values.find(key)->second : default_value;
}

string INIReader::GetString(const string& section, const string& name, const string& default_value) const
{
    const string str = Get(section, name, "");
    return str.empty() ? default_value : str;
}

long INIReader::GetInteger(const string& section, const string& name, long default_value) const
{
    string valstr = Get(section, name, "");
    const char* value = valstr.c_str();
    char* end;
    // This parses "1234" (decimal) and also "0x4D2" (hex)
    long n = strtol(value, &end, 0);
    return end > value ? n : default_value;
}

double INIReader::GetReal(const string& section, const string& name, double default_value) const
{
    string valstr = Get(section, name, "");
    const char* value = valstr.c_str();
    char* end;
    double n = strtod(value, &end);
    return end > value ? n : default_value;
}

bool INIReader::GetBoolean(const string& section, const string& name, bool default_value) const
{
    string valstr = Get(section, name, "");
    // Convert to lower case to make string comparisons case-insensitive
    std::transform(valstr.begin(), valstr.end(), valstr.begin(), ::tolower);
    if (valstr == "true" || valstr == "yes" || valstr == "on" || valstr == "1")
        return true;
    else if (valstr == "false" || valstr == "no" || valstr == "off" || valstr == "0")
        return false;
    else
        return default_value;
}

bool INIReader::HasSection(const string& section) const
{
    const string key = MakeKey(section, "");
    std::map<string, string>::const_iterator pos = _values.lower_bound(key);
    if (pos == _values.end())
        return false;
    // Does the key at the lower_bound pos start with "section"?
    return pos->first.compare(0, key.length(), key) == 0;
}

bool INIReader::HasValue(const string& section, const string& name) const
{
    string key = MakeKey(section, name);
    return _values.count(key);
}

string INIReader::MakeKey(const string& section, const string& name)
{
    string key = section + "=" + name;
    // Convert to lower case to make section/name lookups case-insensitive
    std::transform(key.begin(), key.end(), key.begin(), ::tolower);
    return key;
}

int INIReader::ValueHandler(void* user, const char* section, const char* name,
                            const char* value)
{
    INIReader* reader = static_cast<INIReader*>(user);
    string key = MakeKey(section, name);
    if (reader->_values[key].size() > 0)
        reader->_values[key] += "\n";
    reader->_values[key] += value;
    return 1;
}