/*
    Copyright 2016-2019 Arisotura

    This file is part of melonDS.

    melonDS is free software: you can redistribute it and/or modify it under
    the terms of the GNU General Public License as published by the Free
    Software Foundation, either version 3 of the License, or (at your option)
    any later version.

    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with melonDS. If not, see http://www.gnu.org/licenses/.
*/

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "Config.h"
#include "Platform.h"


namespace Config
{

const char* kConfigFile = "melonDS.ini";

int _3DRenderer;
int Threaded3D;

int GL_ScaleFactor;
int GL_Antialias;

ConfigEntry ConfigFile[] =
{
    {"3DRenderer", 0, &_3DRenderer, 1, NULL, 0},
    {"Threaded3D", 0, &Threaded3D, 1, NULL, 0},

    {"GL_ScaleFactor", 0, &GL_ScaleFactor, 1, NULL, 0},
    {"GL_Antialias", 0, &GL_Antialias, 0, NULL, 0},

    {"", -1, NULL, 0, NULL, 0}
};

extern ConfigEntry PlatformConfigFile[];


void Load()
{
    ConfigEntry* entry = &ConfigFile[0];
    int c = 0;
    for (;;)
    {
        if (!entry->Value)
        {
            if (c > 0) break;
            entry = &PlatformConfigFile[0];
            if (!entry->Value) break;
            c++;
        }

        if (entry->Type == 0)
            *(int*)entry->Value = entry->DefaultInt;
        else
        {
            strncpy((char*)entry->Value, entry->DefaultStr, entry->StrLength);
            ((char*)entry->Value)[entry->StrLength] = '\0';
        }

        entry++;
    }

    FILE* f = Platform::OpenLocalFile(kConfigFile, "r");
    if (!f) return;

    char linebuf[1024];
    char entryname[16];
    char entryval[1024];
    while (!feof(f))
    {
        fgets(linebuf, 1024, f);
        int ret = sscanf(linebuf, "%15[A-Za-z_0-9]=%[^\t\n]", entryname, entryval);
        if (ret < 2) continue;

        ConfigEntry* entry = &ConfigFile[0];
        c = 0;
        for (;;)
        {
            if (!entry->Value)
            {
                if (c > 0) break;
                entry = &PlatformConfigFile[0];
                if (!entry->Value) break;
                c++;
            }

            if (!strncmp(entry->Name, entryname, 15))
            {
                if (entry->Type == 0)
                    *(int*)entry->Value = strtol(entryval, NULL, 10);
                else
                    strncpy((char*)entry->Value, entryval, entry->StrLength);

                break;
            }

            entry++;
        }
    }

    fclose(f);
}

void Save()
{
    FILE* f = Platform::OpenLocalFile(kConfigFile, "w");
    if (!f) return;

    ConfigEntry* entry = &ConfigFile[0];
    int c = 0;
    for (;;)
    {
        if (!entry->Value)
        {
            if (c > 0) break;
            entry = &PlatformConfigFile[0];
            if (!entry->Value) break;
            c++;
        }

        if (entry->Type == 0)
            fprintf(f, "%s=%d\n", entry->Name, *(int*)entry->Value);
        else
            fprintf(f, "%s=%s\n", entry->Name, entry->Value);

        entry++;
    }

    fclose(f);
}


}
