/* A clickable button widget
 * 
 */

#ifndef _MENUBUTTON_H_
#define _MENUBUTTON_H_

#include <SDL.h>
#include <SDL_ttf.h>
#include <string>
#include "entity.h"
#include "gamedata.h"
#include "gamevertex.h"

using std::string;

// fixme: there's probably a better way to do this, but SDL's event model
//        has me hard-pressed to figure out what it is.
enum ButtonAction {BUTTON_BUILD=0x1, BUTTON_ATTACK=0x2, BUTTON_MOVE=0x4,
		   BUTTON_BUILD_ATTACKER=0x8, BUTTON_BUILD_DEFENDER=0x10,
		   BUTTON_BUILD_PRODUCER=0x20, BUTTON_END_TURN=0x40};

class MenuButton : public Entity
{
 public:
    MenuButton(string text = "", TTF_Font* font = NULL, int x = 0, int y = 0,
	       ButtonAction action = BUTTON_BUILD, int colour=0x000000,
	       int hover_colour=0xff0000, int selected_colour=0x0000ff,
	       int background_colour=0x888888);

    // Selectable buttons change colour for the duration they are selected,
    // and should ignore clicks while selected
    void set_selected(bool is_selected);
    void set_visible(bool is_visible);

    bool init();
    void render(SDL_Surface* display);
    void iterate();

    bool is_at(int test_x, int test_y);
    ButtonAction get_action() const { return action; }


    // To get some complexity out of the Game class, let's teach MenuButton
    // how to handle her own state, based on the current Mode and VertexType
    // This isn't wonderful coupling, but it'll do
    void set_state(Mode mode, VertexType type, GameVertex* current,
		   bool can_build);

 private:
    string text;
    int x;
    int y;

    int colour;
    int hover_colour;
    int selected_colour;
    int background_colour;

    bool hover;
    bool selected;
    bool visible;
    bool enabled;

    TTF_Font* font;

    ButtonAction action;
};

#endif