#include "Common.h"
#include "Registry.h"
#include "block/Block.h"

#include "rapidjson/document.h"
#include "rapidjson/filereadstream.h"
#include "rapidjson/stringbuffer.h"
#include "rapidjson/writer.h"

#include <iostream>
#include <fstream>
#include <string>
#include <cstdio>

namespace Feather
{
	IDMapper<BlockState> Registry::BLOCK_STATES;
    RegistryMap<Block> Registry::BLOCKS;

	void Registry::Init()
	{
		static bool initialized = false;
		if (initialized) return;

		Log::Info("Loading data/blocks.json...");
		{
			using namespace rapidjson;

			std::string text;
			FILE* fp = fopen("data/blocks.json", "rb");
			if (!fp) {
				Log::Error("Failed to read data/blocks.json");
				return;
			}
			fseek(fp, 0, SEEK_END);
			text.resize(ftell(fp));
			rewind(fp);
			fread(&text[0], 1, text.size(), fp);
			fclose(fp);

			Document doc;
			doc.Parse(text.c_str());

			
			for (auto& blockData : doc.GetObject())
			{
                const char* blockName = blockData.name.GetString();
                Block block(blockName);

				// TODO
				//if (blockData.value.HasMember("properties")) {}

				//Log::Info("{}: {} states", blockData.name.GetString(), blockData.value["states"].Size());
				for (auto& stateData : blockData.value["states"].GetArray())
				{
					std::string* name = new std::string(blockName);
					BlockState state(*name);

					if (stateData.HasMember("properties"))
					{
						for (auto& prop : stateData["properties"].GetObject())
						{
							std::string* propName = new std::string(prop.name.GetString());
							std::string* propValue = new std::string(prop.value.GetString());
							state.AddProperty(*propName, *propValue);
						}
					}

					BLOCK_STATES.AddMapping(stateData["id"].GetInt(), state);
				}

                BLOCKS.Register(block.GetIdentifier(), std::move(block));

			}

			Log::Info("Loaded {} blocks and {} block states.", BLOCKS.Size(), BLOCK_STATES.Size());

			//StringBuffer buf;
			//Writer<StringBuffer> writer(buf);
			//doc.Accept(writer);

			// FIXME: why does this crash
			//Log::Info(text);


			
		}
	}
}