#include "options.h"
#include "const.h"
#include "screen.h"
#include <fstream>  // Para basic_ofstream, basic_ifstream
#include <iostream> // Para basic_ostream, operator<<, cout

// Variables
options_t options;

bool setOptions(std::string var, std::string value);

void initOptions()
{
    // Version del archivo de configuración
    options.configVersion = "v1.06.1";

    // Opciones de control
    options.keys = ctrl_cursor;

    // Opciones de video
    options.gameWidth = GAMECANVAS_WIDTH;
    options.gameHeight = GAMECANVAS_HEIGHT;
    options.videoMode = 0;
    options.windowSize = 3;
    options.filter = FILTER_NEAREST;
    options.shaders = false;
    options.vSync = true;
    options.integerScale = true;
    options.keepAspect = true;
    options.borderEnabled = true;
    options.borderWidth = 32;
    options.borderHeight = 24;
    options.palette = p_zxspectrum;

#ifdef GAME_CONSOLE
    options.windowSize = 2;
#endif

    // Estos valores no se guardan en el fichero de configuración
    options.console = false;
#ifdef DEBUG
    options.console = true;
#endif
    options.cheat.infiniteLives = false;
    options.cheat.invincible = false;
    options.cheat.jailEnabled = false;
    options.cheat.altSkin = false;
    options.stats.rooms = 0;
    options.stats.items = 0;

    // Opciones de las notificaciones
    options.notifications.posV = pos_top;
    options.notifications.posH = pos_left;
    options.notifications.sound = true;
    options.notifications.color = {48, 48, 48};

#ifdef DEBUG
    options.section.name = SECTION_TITLE;
    options.section.subsection = SUBSECTION_LOGO_TO_INTRO;
#else
    options.section.name = SECTION_LOGO;
    options.section.subsection = SUBSECTION_LOGO_TO_INTRO;
#endif
}

bool loadOptionsFromFile(const std::string &file_path)
{
    // Indicador de éxito en la carga
    bool success = true;

    // Versión actual del fichero
    const std::string configVersion = options.configVersion;
    options.configVersion = "";

    // Variables para manejar el fichero
    std::string line;
    std::ifstream file(file_path);

    // Si el fichero se puede abrir
    if (file.good())
    {
        // Procesa el fichero linea a linea
        if (options.console)
        {
            std::cout << "Reading file config.txt\n";
        }
        while (std::getline(file, line))
        {
            // Comprueba que la linea no sea un comentario
            if (line.substr(0, 1) != "#")
            {
                // Encuentra la posición del caracter '='
                int pos = line.find("=");
                // Procesa las dos subcadenas
                if (!setOptions(line.substr(0, pos), line.substr(pos + 1, line.length())))
                {
                    if (options.console)
                    {
                        std::cout << "Warning: file config.txt\n";
                        std::cout << "unknown parameter " << line.substr(0, pos).c_str() << std::endl;
                    }
                    success = false;
                }
            }
        }

        // Cierra el fichero
        if (options.console)
        {
            std::cout << "Closing file config.txt\n\n";
        }
        file.close();
    }

    // El fichero no existe
    else
    { // Crea el fichero con los valores por defecto
        saveOptionsToFile(file_path);
    }

    // Si la versión de fichero no coincide, crea un fichero nuevo con los valores por defecto
    if (configVersion != options.configVersion)
    {
        initOptions();
        saveOptionsToFile(file_path);
    }

    // Normaliza los valores
    const bool a = options.videoMode == 0;
    const bool b = options.videoMode == SDL_WINDOW_FULLSCREEN;
    const bool c = options.videoMode == SDL_WINDOW_FULLSCREEN_DESKTOP;
    if (!(a || b || c))
    {
        options.videoMode = 0;
    }

    if (options.windowSize < 1 || options.windowSize > 4)
    {
        options.windowSize = 3;
    }

    return success;
}

bool saveOptionsToFile(const std::string &file_path)
{
    bool success = true;

    // Crea y abre el fichero de texto
    std::ofstream file(file_path);

    if (file.good())
    {
        if (options.console)
        {
            std::cout << file_path << " open for writing" << std::endl;
        }
    }
    else
    {
        if (options.console)
        {
            std::cout << file_path << " can't be opened" << std::endl;
        }
    }

    // Escribe en el fichero
    file << "## VERSION\n";
    file << "configVersion=" + options.configVersion + "\n";

    file << "\n## CONTROL OPTIONS\n";
    file << "## keys = CURSOR | OPQA | WASD\n";
    if (options.keys == ctrl_cursor)
    {
        file << "keys=CURSOR\n";
    }
    else if (options.keys == ctrl_opqa)
    {
        file << "keys=OPQA\n";
    }
    else if (options.keys == ctrl_wasd)
    {
        file << "keys=WASD\n";
    }

    file << "\n## VISUAL OPTIONS\n";
    if (options.videoMode == 0)
    {
        file << "videoMode=0\n";
    }

    else if (options.videoMode == SDL_WINDOW_FULLSCREEN)
    {
        file << "videoMode=SDL_WINDOW_FULLSCREEN\n";
    }

    else if (options.videoMode == SDL_WINDOW_FULLSCREEN_DESKTOP)
    {
        file << "videoMode=SDL_WINDOW_FULLSCREEN_DESKTOP\n";
    }

    file << "windowSize=" + std::to_string(options.windowSize) + "\n";

    if (options.filter == FILTER_NEAREST)
    {
        file << "filter=FILTER_NEAREST\n";
    }
    else
    {
        file << "filter=FILTER_LINEAR\n";
    }

    file << "shaders=" + boolToString(options.shaders) + "\n";
    file << "vSync=" + boolToString(options.vSync) + "\n";
    file << "integerScale=" + boolToString(options.integerScale) + "\n";
    file << "keepAspect=" + boolToString(options.keepAspect) + "\n";
    file << "borderEnabled=" + boolToString(options.borderEnabled) + "\n";
    file << "borderWidth=" + std::to_string(options.borderWidth) + "\n";
    file << "borderHeight=" + std::to_string(options.borderHeight) + "\n";
    file << "palette=" + std::to_string(options.palette) + "\n";

    file << "\n## NOTIFICATION OPTIONS\n";
    file << "## notifications.posV = pos_top | pos_bottom\n";
    if (options.notifications.posV == pos_top)
    {
        file << "notifications.posV=pos_top\n";
    }
    else
    {
        file << "notifications.posV=pos_bottom\n";
    }

    file << "## notifications.posH = pos_left | pos_middle | pos_right\n";
    if (options.notifications.posH == pos_left)
    {
        file << "notifications.posH=pos_left\n";
    }
    else if (options.notifications.posH == pos_middle)
    {
        file << "notifications.posH=pos_middle\n";
    }
    else
    {
        file << "notifications.posH=pos_right\n";
    }

    file << "notifications.sound=" + boolToString(options.notifications.sound) + "\n";

    // Cierra el fichero
    file.close();

    return success;
}

bool setOptions(std::string var, std::string value)
{
    // Indicador de éxito en la asignación
    bool success = true;

    if (var == "configVersion")
    {
        options.configVersion = value;
    }

    else if (var == "keys")
    {
        if (value == "OPQA")
        {
            options.keys = ctrl_opqa;
        }
        else if (value == "WASD")
        {
            options.keys = ctrl_wasd;
        }
        else
        {
            options.keys = ctrl_cursor;
        }
    }

    else if (var == "videoMode")
    {
        if (value == "SDL_WINDOW_FULLSCREEN_DESKTOP")
        {
            options.videoMode = SDL_WINDOW_FULLSCREEN_DESKTOP;
        }
        else if (value == "SDL_WINDOW_FULLSCREEN")
        {
            options.videoMode = SDL_WINDOW_FULLSCREEN;
        }
        else
        {
            options.videoMode = 0;
        }
    }

    else if (var == "windowSize")
    {
        options.windowSize = std::stoi(value);
        if ((options.windowSize < 1) || (options.windowSize > 4))
        {
            options.windowSize = 3;
        }
    }

    else if (var == "filter")
    {
        if (value == "FILTER_LINEAR")
        {
            options.filter = FILTER_LINEAR;
        }
        else
        {
            options.filter = FILTER_NEAREST;
        }
    }

    else if (var == "shaders")
    {
        options.shaders = stringToBool(value);
    }

    else if (var == "vSync")
    {
        options.vSync = stringToBool(value);
    }

    else if (var == "integerScale")
    {
        options.integerScale = stringToBool(value);
    }

    else if (var == "keepAspect")
    {
        options.keepAspect = stringToBool(value);
    }

    else if (var == "borderEnabled")
    {
        options.borderEnabled = stringToBool(value);
    }

    else if (var == "borderWidth")
    {
        options.borderWidth = std::stoi(value);
    }

    else if (var == "borderHeight")
    {
        options.borderHeight = std::stoi(value);
    }

    else if (var == "palette")
    {
        const int pal = std::stoi(value);

        if (pal == 0)
        {
            options.palette = p_zxspectrum;
        }

        else if (pal == 1)
        {
            options.palette = p_zxarne;
        }
    }

    else if (var == "notifications.posH")
    {
        if (value == "pos_left")
        {
            options.notifications.posH = pos_left;
        }
        else if (value == "pos_middle")
        {
            options.notifications.posH = pos_middle;
        }
        else
        {
            options.notifications.posH = pos_right;
        }
    }

    else if (var == "notifications.posV")
    {
        if (value == "pos_top")
        {
            options.notifications.posV = pos_top;
        }
        else
        {
            options.notifications.posV = pos_bottom;
        }
    }

    else if (var == "notifications.sound")
    {
        options.notifications.sound = stringToBool(value);
    }

    else if (var == "" || var.substr(0, 1) == "#")
    {
    }

    else
    {
        success = false;
    }

    return success;
}