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/*
Minetest
Copyright (C) 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.
*/

#include "irrlichttypes_extrabloated.h"
#include "mapnode.h"
#include "porting.h"
#include "nodedef.h"
#include "map.h"
#include "content_mapnode.h" // For mapnode_translate_*_internal
#include "serialization.h" // For ser_ver_supported
#include "util/serialize.h"
#include "log.h"
#include "util/directiontables.h"
#include "util/numeric.h"
#include <string>
#include <sstream>

static const Rotation wallmounted_to_rot[] = {
	ROTATE_0, ROTATE_180, ROTATE_90, ROTATE_270
};

static const u8 rot_to_wallmounted[] = {
	2, 4, 3, 5
};


/*
	MapNode
*/

void MapNode::getColor(const ContentFeatures &f, video::SColor *color) const
{
	if (f.palette) {
		*color = (*f.palette)[param2];
		return;
	}
	*color = f.color;
}

void MapNode::setLight(LightBank bank, u8 a_light, const ContentFeatures &f) noexcept
{
	// If node doesn't contain light data, ignore this
	if(f.param_type != CPT_LIGHT)
		return;
	if(bank == LIGHTBANK_DAY)
	{
		param1 &= 0xf0;
		param1 |= a_light & 0x0f;
	}
	else if(bank == LIGHTBANK_NIGHT)
	{
		param1 &= 0x0f;
		param1 |= (a_light & 0x0f)<<4;
	}
	else
		assert("Invalid light bank" == NULL);
}

void MapNode::setLight(LightBank bank, u8 a_light, const NodeDefManager *nodemgr)
{
	setLight(bank, a_light, nodemgr->get(*this));
}

bool MapNode::isLightDayNightEq(const NodeDefManager *nodemgr) const
{
	const ContentFeatures &f = nodemgr->get(*this);
	bool isEqual;

	if (f.param_type == CPT_LIGHT) {
		u8 day   = MYMAX(f.light_source, param1 & 0x0f);
		u8 night = MYMAX(f.light_source, (param1 >> 4) & 0x0f);
		isEqual = day == night;
	} else {
		isEqual = true;
	}

	return isEqual;
}

u8 MapNode::getLight(LightBank bank, const NodeDefManager *nodemgr) const
{
	// Select the brightest of [light source, propagated light]
	const ContentFeatures &f = nodemgr->get(*this);

	u8 light;
	if(f.param_type == CPT_LIGHT)
		light = bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
	else
		light = 0;

	return MYMAX(f.light_source, light);
}

u8 MapNode::getLightRaw(LightBank bank, const ContentFeatures &f) const noexcept
{
	if(f.param_type == CPT_LIGHT)
		return bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f;
	return 0;
}

u8 MapNode::getLightNoChecks(LightBank bank, const ContentFeatures *f) const noexcept
{
	return MYMAX(f->light_source,
	             bank == LIGHTBANK_DAY ? param1 & 0x0f : (param1 >> 4) & 0x0f);
}

bool MapNode::getLightBanks(u8 &lightday, u8 &lightnight,
	const NodeDefManager *nodemgr) const
{
	// Select the brightest of [light source, propagated light]
	const ContentFeatures &f = nodemgr->get(*this);
	if(f.param_type == CPT_LIGHT)
	{
		lightday = param1 & 0x0f;
		lightnight = (param1>>4)&0x0f;
	}
	else
	{
		lightday = 0;
		lightnight = 0;
	}
	if(f.light_source > lightday)
		lightday = f.light_source;
	if(f.light_source > lightnight)
		lightnight = f.light_source;
	return f.param_type == CPT_LIGHT || f.light_source != 0;
}

u8 MapNode::getFaceDir(const NodeDefManager *nodemgr,
	bool allow_wallmounted) const
{
	const ContentFeatures &f = nodemgr->get(*this);
	if (f.param_type_2 == CPT2_FACEDIR ||
			f.param_type_2 == CPT2_COLORED_FACEDIR)
		return (getParam2() & 0x1F) % 24;
	if (allow_wallmounted && (f.param_type_2 == CPT2_WALLMOUNTED ||
			f.param_type_2 == CPT2_COLORED_WALLMOUNTED))
		return wallmounted_to_facedir[getParam2() & 0x07];
	return 0;
}

u8 MapNode::getWallMounted(const NodeDefManager *nodemgr) const
{
	const ContentFeatures &f = nodemgr->get(*this);
	if (f.param_type_2 == CPT2_WALLMOUNTED ||
			f.param_type_2 == CPT2_COLORED_WALLMOUNTED) {
		return getParam2() & 0x07;
	} else if (f.drawtype == NDT_SIGNLIKE || f.drawtype == NDT_TORCHLIKE) {
		return 1;
	}
	return 0;
}

v3s16 MapNode::getWallMountedDir(const NodeDefManager *nodemgr) const
{
	switch(getWallMounted(nodemgr))
	{
	case 0: default: return v3s16(0,1,0);
	case 1: return v3s16(0,-1,0);
	case 2: return v3s16(1,0,0);
	case 3: return v3s16(-1,0,0);
	case 4: return v3s16(0,0,1);
	case 5: return v3s16(0,0,-1);
	}
}

u8 MapNode::getDegRotate(const NodeDefManager *nodemgr) const
{
	const ContentFeatures &f = nodemgr->get(*this);
	if (f.param_type_2 == CPT2_DEGROTATE)
		return getParam2() % 240;
	if (f.param_type_2 == CPT2_COLORED_DEGROTATE)
		return 10 * ((getParam2() & 0x1F) % 24);
	return 0;
}

void MapNode::rotateAlongYAxis(const NodeDefManager *nodemgr, Rotation rot)
{
	ContentParamType2 cpt2 = nodemgr->get(*this).param_type_2;

	if (cpt2 == CPT2_FACEDIR || cpt2 == CPT2_COLORED_FACEDIR) {
		static const u8 rotate_facedir[24 * 4] = {
			// Table value = rotated facedir
			// Columns: 0, 90, 180, 270 degrees rotation around vertical axis
			// Rotation is anticlockwise as seen from above (+Y)

			0, 1, 2, 3,  // Initial facedir 0 to 3
			1, 2, 3, 0,
			2, 3, 0, 1,
			3, 0, 1, 2,

			4, 13, 10, 19,  // 4 to 7
			5, 14, 11, 16,
			6, 15, 8, 17,
			7, 12, 9, 18,

			8, 17, 6, 15,  // 8 to 11
			9, 18, 7, 12,
			10, 19, 4, 13,
			11, 16, 5, 14,

			12, 9, 18, 7,  // 12 to 15
			13, 10, 19, 4,
			14, 11, 16, 5,
			15, 8, 17, 6,

			16, 5, 14, 11,  // 16 to 19
			17, 6, 15, 8,
			18, 7, 12, 9,
			19, 4, 13, 10,

			20, 23, 22, 21,  // 20 to 23
			21, 20, 23, 22,
			22, 21, 20, 23,
			23, 22, 21, 20
		};
		u8 facedir = (param2 & 31) % 24;
		u8 index = facedir * 4 + rot;
		param2 &= ~31;
		param2 |= rotate_facedir[index];
	} else if (cpt2 == CPT2_WALLMOUNTED ||
			cpt2 == CPT2_COLORED_WALLMOUNTED) {
		u8 wmountface = (param2 & 7);
		if (wmountface <= 1)
			return;

		Rotation oldrot = wallmounted_to_rot[wmountface - 2];
		param2 &= ~7;
		param2 |= rot_to_wallmounted[(oldrot - rot) & 3];
	} else if (cpt2 == CPT2_DEGROTATE) {
		int angle = param2; // in 1.5°
		angle += 60 * rot; // don’t do that on u8
		angle %= 240;
		param2 = angle;
	} else if (cpt2 == CPT2_COLORED_DEGROTATE) {
		int angle = param2 & 0x1F; // in 15°
		int color = param2 & 0xE0;
		angle += 6 * rot;
		angle %= 24;
		param2 = color | angle;
	}
}

void transformNodeBox(const MapNode &n, const NodeBox &nodebox,
	const NodeDefManager *nodemgr, std::vector<aabb3f> *p_boxes,
	u8 neighbors = 0)
{
	std::vector<aabb3f> &boxes = *p_boxes;

	if (nodebox.type == NODEBOX_FIXED || nodebox.type == NODEBOX_LEVELED) {
		const std::vector<aabb3f> &fixed = nodebox.fixed;
		int facedir = n.getFaceDir(nodemgr, true);
		u8 axisdir = facedir>>2;
		facedir&=0x03;
		for (aabb3f box : fixed) {
			if (nodebox.type == NODEBOX_LEVELED)
				box.MaxEdge.Y = (-0.5f + n.getLevel(nodemgr) / 64.0f) * BS;

			switch (axisdir) {
			case 0:
				if(facedir == 1)
				{
					box.MinEdge.rotateXZBy(-90);
					box.MaxEdge.rotateXZBy(-90);
				}
				else if(facedir == 2)
				{
					box.MinEdge.rotateXZBy(180);
					box.MaxEdge.rotateXZBy(180);
				}
				else if(facedir == 3)
				{
					box.MinEdge.rotateXZBy(90);
					box.MaxEdge.rotateXZBy(90);
				}
				break;
			case 1: // z+
				box.MinEdge.rotateYZBy(90);
				box.MaxEdge.rotateYZBy(90);
				if(facedir == 1)
				{
					box.MinEdge.rotateXYBy(90);
					box.MaxEdge.rotateXYBy(90);
				}
				else if(facedir == 2)
				{
					box.MinEdge.rotateXYBy(180);
					box.MaxEdge.rotateXYBy(180);
				}
				else if(facedir == 3)
				{
					box.MinEdge.rotateXYBy(-90);
					box.MaxEdge.rotateXYBy(-90);
				}
				break;
			case 2: //z-
				box.MinEdge.rotateYZBy(-90);
				box.MaxEdge.rotateYZBy(-90);
				if(facedir == 1)
				{
					box.MinEdge.rotateXYBy(-90);
					box.MaxEdge.rotateXYBy(-90);
				}
				else if(facedir == 2)
				{
					box.MinEdge.rotateXYBy(180);
					box.MaxEdge.rotateXYBy(180);
				}
				else if(facedir == 3)
				{
					box.MinEdge.rotateXYBy(90);
					box.MaxEdge.rotateXYBy(90);
				}
				break;
			case 3:  //x+
				box.MinEdge.rotateXYBy(-90);
				box.MaxEdge.rotateXYBy(-90);
				if(facedir == 1)
				{
					box.MinEdge.rotateYZBy(90);
					box.MaxEdge.rotateYZBy(90);
				}
				else if(facedir == 2)
				{
					box.MinEdge.rotateYZBy(180);
					box.MaxEdge.rotateYZBy(180);
				}
				else if(facedir == 3)
				{
					box.MinEdge.rotateYZBy(-90);
					box.MaxEdge.rotateYZBy(-90);
				}
				break;
			case 4:  //x-
				box.MinEdge.rotateXYBy(90);
				box.MaxEdge.rotateXYBy(90);
				if(facedir == 1)
				{
					box.MinEdge.rotateYZBy(-90);
					box.MaxEdge.rotateYZBy(-90);
				}
				else if(facedir == 2)
				{
					box.MinEdge.rotateYZBy(180);
					box.MaxEdge.rotateYZBy(180);
				}
				else if(facedir == 3)
				{
					box.MinEdge.rotateYZBy(90);
					box.MaxEdge.rotateYZBy(90);
				}
				break;
			case 5:
				box.MinEdge.rotateXYBy(-180);
				box.MaxEdge.rotateXYBy(-180);
				if(facedir == 1)
				{
					box.MinEdge.rotateXZBy(90);
					box.MaxEdge.rotateXZBy(90);
				}