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/*
Minetest
Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser 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 ACTIVEOBJECT_HEADER
#define ACTIVEOBJECT_HEADER

#include "irr_aabb3d.h"
#include <string>

enum ActiveObjectType {
	ACTIVEOBJECT_TYPE_INVALID = 0,
	ACTIVEOBJECT_TYPE_TEST = 1,
// Deprecated stuff
	ACTIVEOBJECT_TYPE_ITEM = 2,
	ACTIVEOBJECT_TYPE_RAT = 3,
	ACTIVEOBJECT_TYPE_OERKKI1 = 4,
	ACTIVEOBJECT_TYPE_FIREFLY = 5,
	ACTIVEOBJECT_TYPE_MOBV2 = 6,
// End deprecated stuff
	ACTIVEOBJECT_TYPE_LUAENTITY = 7,
// Special type, not stored as a static object
	ACTIVEOBJECT_TYPE_PLAYER = 100,
// Special type, only exists as CAO
	ACTIVEOBJECT_TYPE_GENERIC = 101,
};
// Other types are defined in content_object.h

struct ActiveObjectMessage
{
	ActiveObjectMessage(u16 id_, bool reliable_=true, std::string data_=""):
		id(id_),
		reliable(reliable_),
		datastring(data_)
	{}

	u16 id;
	bool reliable;
	std::string datastring;
};

/*
	Parent class for ServerActiveObject and ClientActiveObject
*/
class ActiveObject
{
public:
	ActiveObject(u16 id):
		m_id(id)
	{
	}
	
	u16 getId()
	{
		return m_id;
	}

	void setId(u16 id)
	{
		m_id = id;
	}

	virtual ActiveObjectType getType() const = 0;
	virtual bool getCollisionBox(aabb3f *toset) = 0;
	virtual bool collideWithObjects() = 0;
protected:
	u16 m_id; // 0 is invalid, "no id"
};

#endif

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/*
Minetest
Copyright (C) 2010-2014 celeron55, Perttu Ahola <celeron55@gmail.com>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser 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.
*/

#include "drawscene.h"
#include "settings.h"
#include "clouds.h"
#include "clientmap.h"
#include "util/timetaker.h"
#include "fontengine.h"
#include "guiscalingfilter.h"

typedef enum {
	LEFT = -1,
	RIGHT = 1,
	EYECOUNT = 2
} paralax_sign;

void draw_anaglyph_3d_mode(Camera& camera, bool show_hud, Hud& hud,
		video::IVideoDriver* driver, scene::ISceneManager* smgr,
		bool draw_wield_tool, Client& client,
		gui::IGUIEnvironment* guienv )
{

	/* preserve old setup*/
	irr::core::vector3df oldPosition = camera.getCameraNode()->getPosition();
	irr::core::vector3df oldTarget   = camera.getCameraNode()->getTarget();

	irr::core::matrix4 startMatrix =
			camera.getCameraNode()->getAbsoluteTransformation();
	irr::core::vector3df focusPoint = (camera.getCameraNode()->getTarget()
			- camera.getCameraNode()->getAbsolutePosition()).setLength(1)
			+ camera.getCameraNode()->getAbsolutePosition();


	//Left eye...
	irr::core::vector3df leftEye;
	irr::core::matrix4 leftMove;
	leftMove.setTranslation(
			irr::core::vector3df(-g_settings->getFloat("3d_paralax_strength"),
					0.0f, 0.0f));
	leftEye = (startMatrix * leftMove).getTranslation();

	//clear the depth buffer, and color
	driver->beginScene( true, true, irr::video::SColor(0, 200, 200, 255));
	driver->getOverrideMaterial().Material.ColorMask = irr::video::ECP_RED;
	driver->getOverrideMaterial().EnableFlags = irr::video::EMF_COLOR_MASK;
	driver->getOverrideMaterial().EnablePasses = irr::scene::ESNRP_SKY_BOX
			+ irr::scene::ESNRP_SOLID + irr::scene::ESNRP_TRANSPARENT
			+ irr::scene::ESNRP_TRANSPARENT_EFFECT + irr::scene::ESNRP_SHADOW;
	camera.getCameraNode()->setPosition(leftEye);
	camera.getCameraNode()->setTarget(focusPoint);
	smgr->drawAll();
	driver->setTransform(video::ETS_WORLD, core::IdentityMatrix);
	if (show_hud) {
		hud.drawSelectionMesh();
		if (draw_wield_tool)
			camera.drawWieldedTool(&leftMove);
	}

	guienv->drawAll();

	//Right eye...
	irr::core::vector3df rightEye;
	irr::core::matrix4 rightMove;
	rightMove.setTranslation(
			irr::core::vector3df(g_settings->getFloat("3d_paralax_strength"),
					0.0f, 0.0f));
	rightEye = (startMatrix * rightMove).getTranslation();

	//clear the depth buffer
	driver->clearZBuffer();
	driver->getOverrideMaterial().Material.ColorMask = irr::video::ECP_GREEN
			+ irr::video::ECP_BLUE;
	driver->getOverrideMaterial().EnableFlags = irr::video::EMF_COLOR_MASK;
	driver->getOverrideMaterial().EnablePasses = irr::scene::ESNRP_SKY_BOX
			+ irr::scene::ESNRP_SOLID + irr::scene::ESNRP_TRANSPARENT
			+ irr::scene::ESNRP_TRANSPARENT_EFFECT + irr::scene::ESNRP_SHADOW;
	camera.getCameraNode()->setPosition(rightEye);
	camera.getCameraNode()->setTarget(focusPoint);
	smgr->drawAll();
	driver->setTransform(video::ETS_WORLD, core::IdentityMatrix);
	if (show_hud) {
		hud.drawSelectionMesh();
		if (draw_wield_tool)
			camera.drawWieldedTool(&rightMove);
	}

	guienv->drawAll();

	driver->getOverrideMaterial().Material.ColorMask = irr::video::ECP_ALL;
	driver->getOverrideMaterial().EnableFlags = 0;
	driver->getOverrideMaterial().EnablePasses = 0;
	camera.getCameraNode()->setPosition(oldPosition);
	camera.getCameraNode()->setTarget(oldTarget);
}

void init_texture(video::IVideoDriver* driver, const v2u32& screensize,
		video::ITexture** texture, const char* name)
{
	if (*texture != NULL)
	{
		driver->removeTexture(*texture);
	}
	*texture = driver->addRenderTargetTexture(
			core::dimension2d<u32>(screensize.X, screensize.Y), name,
			irr::video::ECF_A8R8G8B8);
}

video::ITexture* draw_image(const v2u32 &screensize,
		paralax_sign psign, const irr::core::matrix4 &startMatrix,
		const irr::core::vector3df &focusPoint, bool show_hud,
		video::IVideoDriver *driver, Camera &camera, scene::ISceneManager *smgr,
		Hud &hud, bool draw_wield_tool, Client &client,
		gui::IGUIEnvironment *guienv, const video::SColor &skycolor)
{
	static video::ITexture* images[2] = { NULL, NULL };
	static v2u32 last_screensize = v2u32(0, 0);

	video::ITexture* image = NULL;

	if (screensize != last_screensize) {
		init_texture(driver, screensize, &images[1], "mt_drawimage_img1");
		init_texture(driver, screensize, &images[0], "mt_drawimage_img2");
		last_screensize = screensize;
	}

	if (psign == RIGHT)
		image = images[1];
	else
		image = images[0];

	driver->setRenderTarget(image, true, true,
			irr::video::SColor(255,
					skycolor.getRed(), skycolor.getGreen(), skycolor.getBlue()));

	irr::core::vector3df eye_pos;
	irr::core::matrix4 movement;
	movement.setTranslation(
			irr::core::vector3df((int) psign *
					g_settings->getFloat("3d_paralax_strength"), 0.0f, 0.0f));
	eye_pos = (startMatrix * movement).getTranslation();

	//clear the depth buffer
	driver->clearZBuffer();
	camera.getCameraNode()->setPosition(eye_pos);
	camera.getCameraNode()->setTarget(focusPoint);
	smgr->drawAll();

	driver->setTransform(video::ETS_WORLD, core::IdentityMatrix);

	if (show_hud) {
		hud.drawSelectionMesh();
		if (draw_wield_tool)
			camera.drawWieldedTool(&movement);
	}

	guienv->drawAll();

	/* switch back to real renderer */
	driver->setRenderTarget(0, true, true,
			irr::video::SColor(0,
					skycolor.getRed(), skycolor.getGreen(), skycolor.getBlue()));

	return image;
}

video::ITexture*  draw_hud(video::IVideoDriver* driver, const v2u32& screensize,
		bool show_hud, Hud& hud, Client& client, bool draw_crosshair,
		video::SColor skycolor, gui::IGUIEnvironment* guienv, Camera& camera )
{
	static video::ITexture* image = NULL;
	init_texture(driver, screensize, &image, "mt_drawimage_hud");
	driver->setRenderTarget(image, true, true,
			irr::video::SColor(255,0,0,0));

	if (show_hud)
	{
		if (draw_crosshair)
			hud.drawCrosshair();
		hud.drawHotbar(client.getPlayerItem());
		hud.drawLuaElements(camera.getOffset());
		camera.drawNametags();
		guienv->drawAll();
	}

	driver->setRenderTarget(0, true, true,
			irr::video::SColor(0,
					skycolor.getRed(), skycolor.getGreen(), skycolor.getBlue()));

	return image;
}

void draw_interlaced_3d_mode(Camera& camera, bool show_hud,
		Hud& hud, video::IVideoDriver* driver,
		scene::ISceneManager* smgr, const v2u32& screensize,
		bool draw_wield_tool, Client& client, gui::IGUIEnvironment* guienv,
		video::SColor skycolor )
{
	/* save current info */
	irr::core::vector3df oldPosition = camera.getCameraNode()->getPosition();
	irr::core::vector3df oldTarget = camera.getCameraNode()->getTarget();
	irr::core::matrix4 startMatrix =
			camera.getCameraNode()->getAbsoluteTransformation();
	irr::core::vector3df focusPoint = (camera.getCameraNode()->getTarget()
			- camera.getCameraNode()->getAbsolutePosition()).setLength(1)
			+ camera.getCameraNode()->getAbsolutePosition();

	/* create left view */
	video::ITexture* left_image = draw_image(screensize, LEFT, startMatrix,
			focusPoint, show_hud, driver, camera, smgr, hud,
			draw_wield_tool, client, guienv, skycolor);

	//Right eye...
	irr::core::vector3df rightEye;
	irr::core::matrix4 rightMove;
	rightMove.setTranslation(