/*
Minetest-c55
Copyright (C) 2010 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 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.
*/

#include "tile.h"
#include "porting.h"
// For IrrlichtWrapper
#include "main.h"
#include <string>

/*
	These can either be real paths or generated names of preloaded
	textures (like "mud.png_sidegrass")
*/
std::string g_tile_texture_paths[TILES_COUNT];

const char * tile_texture_path_get(u32 i)
{
	assert(i < TILES_COUNT);

	//return g_tile_texture_paths[i];
	return g_tile_texture_paths[i].c_str();
}

// A mapping from tiles to materials
// Initialized at run-time.
video::SMaterial g_tile_materials[TILES_COUNT];

enum TileTextureModID
{
	TTMID_NONE,
	TTMID_SIDEGRASS,
};

struct TileTextureSpec
{
	const char *filename;
	enum TileTextureModID mod;
};

/*
	Initializes g_tile_texture_paths with paths of textures,
	generates generated textures and creates the tile material array.
*/
void init_tile_textures()
{
	TileTextureSpec tile_texture_specs[TILES_COUNT] =
	{
		{NULL, TTMID_NONE},
		{"stone.png", TTMID_NONE},
		{"water.png", TTMID_NONE},
		{"grass.png", TTMID_NONE},
		{"tree.png", TTMID_NONE},
		{"leaves.png", TTMID_NONE},
		{"grass_footsteps.png", TTMID_NONE},
		{"mese.png", TTMID_NONE},
		{"mud.png", TTMID_NONE},
		{"tree_top.png", TTMID_NONE},
		{"mud.png", TTMID_SIDEGRASS},
		{"cloud.png", TTMID_NONE},
		{"coalstone.png", TTMID_NONE},
		{"wood.png", TTMID_NONE},
	};
	
	for(s32 i=0; i<TILES_COUNT; i++)
	{
		const char *filename = tile_texture_specs[i].filename;
		enum TileTextureModID mod_id = tile_texture_specs[i].mod;

		if(filename != NULL && std::string("") != filename)
		{
			std::string path = porting::getDataPath(filename);
			std::string mod_postfix = "";
			if(mod_id == TTMID_SIDEGRASS)
			{
				mod_postfix = "_sidegrass";
				// Generate texture
				TextureMod *mod = new SideGrassTextureMod();
				g_irrlicht->getTexture(TextureSpec(path + mod_postfix,
						path, mod));
			}
			g_tile_texture_paths[i] = path + mod_postfix;
		}
	}

	for(s32 i=0; i<TILES_COUNT; i++)
	{
		const char *path = tile_texture_path_get(i);

		video::ITexture *t = NULL;

		if(path != NULL && std::string("") != path)
		{
			t = g_irrlicht->getTexture(path);
			assert(t != NULL);
		}

		g_tile_materials[i].Lighting = false;
		g_tile_materials[i].BackfaceCulling = false;
		g_tile_materials[i].setFlag(video::EMF_BILINEAR_FILTER, false);
		g_tile_materials[i].setFlag(video::EMF_ANTI_ALIASING, video::EAAM_OFF);
		//if(i != TILE_WATER)
		g_tile_materials[i].setFlag(video::EMF_FOG_ENABLE, true);
		
		//g_tile_materials[i].setFlag(video::EMF_TEXTURE_WRAP, video::ETC_REPEAT);
		//g_tile_materials[i].setFlag(video::EMF_ANISOTROPIC_FILTER, false);

		g_tile_materials[i].setTexture(0, t);
	}

	g_tile_materials[TILE_WATER].MaterialType = video::EMT_TRANSPARENT_VERTEX_ALPHA;
	//g_tile_materials[TILE_WATER].MaterialType = video::EMT_TRANSPARENT_ADD_COLOR;
}

video::SMaterial & tile_material_get(u32 i)
{
	assert(i < TILES_COUNT);

	return g_tile_materials[i];
}