/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 */

#ifndef GARGOYLE_GLK_H
#define GARGOYLE_GLK_H

#include "graphics/managed_surface.h"
#include "gargoyle/interpreter.h"

namespace Gargoyle {

typedef uint32 glui32;
typedef int32 glsi32;

/**
 * These are the compile-time conditionals that reveal various Glk optional modules.
 */
#define GLK_MODULE_LINE_ECHO
#define GLK_MODULE_LINE_TERMINATORS
#define GLK_MODULE_UNICODE
#define GLK_MODULE_UNICODE_NORM
#define GLK_MODULE_IMAGE
#define GLK_MODULE_SOUND
#define GLK_MODULE_SOUND2
#define GLK_MODULE_HYPERLINKS
#define GLK_MODULE_DATETIME
#define GLK_MODULE_GARGLKTEXT

/**
 * These types are opaque object identifiers. They're pointers to opaque
 * C structures, which are defined differently by each library.
 */
typedef struct glk_window_struct  *winid_t;
typedef struct glk_stream_struct  *strid_t;
typedef struct glk_fileref_struct *frefid_t;
typedef struct glk_schannel_struct *schanid_t;

enum Gestalt {
	gestalt_Version                = 0,
	gestalt_CharInput              = 1,
	gestalt_LineInput              = 2,
	gestalt_CharOutput             = 3,
	gestalt_CharOutput_CannotPrint = 0,
	gestalt_CharOutput_ApproxPrint = 1,
	gestalt_CharOutput_ExactPrint  = 2,
	gestalt_MouseInput             = 4,
	gestalt_Timer                  = 5,
	gestalt_Graphics               = 6,
	gestalt_DrawImage              = 7,
	gestalt_Sound                  = 8,
	gestalt_SoundVolume            = 9,
	gestalt_SoundNotify            = 10,
	gestalt_Hyperlinks             = 11,
	gestalt_HyperlinkInput         = 12,
	gestalt_SoundMusic             = 13,
	gestalt_GraphicsTransparency   = 14,
	gestalt_Unicode                = 15,
	gestalt_UnicodeNorm            = 16,
	gestalt_LineInputEcho          = 17,
	gestalt_LineTerminators        = 18,
	gestalt_LineTerminatorKey      = 19,
	gestalt_DateTime               = 20,
	gestalt_Sound2                 = 21,
	gestalt_GarglkText             = 0x1100,
};

enum EvType {
	evtype_None         = 0,
	evtype_Timer        = 1,
	evtype_CharInput    = 2,
	evtype_LineInput    = 3,
	evtype_MouseInput   = 4,
	evtype_Arrange      = 5,
	evtype_Redraw       = 6,
	evtype_SoundNotify  = 7,
	evtype_Hyperlink    = 8,
	evtype_VolumeNotify = 9,
};

enum Keycode {
	keycode_Unknown  = 0xffffffffU,
	keycode_Left     = 0xfffffffeU,
	keycode_Right    = 0xfffffffdU,
	keycode_Up       = 0xfffffffcU,
	keycode_Down     = 0xfffffffbU,
	keycode_Return   = 0xfffffffaU,
	keycode_Delete   = 0xfffffff9U,
	keycode_Escape   = 0xfffffff8U,
	keycode_Tab      = 0xfffffff7U,
	keycode_PageUp   = 0xfffffff6U,
	keycode_PageDown = 0xfffffff5U,
	keycode_Home     = 0xfffffff4U,
	keycode_End      = 0xfffffff3U,
	keycode_Func1    = 0xffffffefU,
	keycode_Func2    = 0xffffffeeU,
	keycode_Func3    = 0xffffffedU,
	keycode_Func4    = 0xffffffecU,
	keycode_Func5    = 0xffffffebU,
	keycode_Func6    = 0xffffffeaU,
	keycode_Func7    = 0xffffffe9U,
	keycode_Func8    = 0xffffffe8U,
	keycode_Func9    = 0xffffffe7U,
	keycode_Func10   = 0xffffffe6U,
	keycode_Func11   = 0xffffffe5U,
	keycode_Func12   = 0xffffffe4U,
	// The last keycode is always = 0x100000000 - keycode_MAXVAL)
	keycode_MAXVAL   = 28U,
};

enum Style {
	style_Normal       = 0,
	style_Emphasized   = 1,
	style_Preformatted = 2,
	style_Header       = 3,
	style_Subheader    = 4,
	style_Alert        = 5,
	style_Note         = 6,
	style_BlockQuote   = 7,
	style_Input        = 8,
	style_User1        = 9,
	style_User2        = 10,
	style_NUMSTYLES    = 11,
};

enum WinType {
	wintype_AllTypes   = 0,
	wintype_Pair       = 1,
	wintype_Blank      = 2,
	wintype_TextBuffer = 3,
	wintype_TextGrid   = 4,
	wintype_Graphics   = 5,
};

enum WinMethod {
	winmethod_Left    = 0x00,
	winmethod_Right   = 0x01,
	winmethod_Above   = 0x02,
	winmethod_Below   = 0x03,
	winmethod_DirMask = 0x0f,

	winmethod_Fixed        = 0x10,
	winmethod_Proportional = 0x20,
	winmethod_DivisionMask = 0xf0,

	winmethod_Border     = 0x000,
	winmethod_NoBorder   = 0x100,
	winmethod_BorderMask = 0x100,
};

enum FileUsage {
	fileusage_Data        = 0x00,
	fileusage_SavedGame   = 0x01,
	fileusage_Transcript  = 0x02,
	fileusage_InputRecord = 0x03,
	fileusage_TypeMask    = 0x0f,

	fileusage_TextMode    = 0x100,
	fileusage_BinaryMode  = 0x000,
};

enum FileMode {
	filemode_Write       = 0x01,
	filemode_Read        = 0x02,
	filemode_ReadWrite   = 0x03,
	filemode_WriteAppend = 0x05,
};

enum SeekMode {
	seekmode_Start   = 0,
	seekmode_Current = 1,
	seekmode_End     = 2,
};

enum StyleHint {
	stylehint_Indentation     = 0,
	stylehint_ParaIndentation = 1,
	stylehint_Justification  = 2,
	stylehint_Size            = 3,
	stylehint_Weight          = 4,
	stylehint_Oblique         = 5,
	stylehint_Proportional    = 6,
	stylehint_TextColor       = 7,
	stylehint_BackColor       = 8,
	stylehint_ReverseColor    = 9,
	stylehint_NUMHINTS        = 10,

	stylehint_just_LeftFlush  = 0,
	stylehint_just_LeftRight  = 1,
	stylehint_just_Centered   = 2,
	stylehint_just_RightFlush = 3,
};

struct event_t {
	glui32 type;
	winid_t win;
	glui32 val1, val2;
};

struct stream_result_t {
	glui32 readcount;
	glui32 writecount;
};


/**
 * Implements the GLK interface
 */
class Glk : public Interpreter {
private:
	Graphics::ManagedSurface *_surface;
public:
	/**
	 * Constructor
	 */
	Glk() {}
};

} // End of namespace Gargoyle

#endif