// ======================= ZoneTool =======================
// zonetool, a fastfile linker for various
// Call of Duty titles. 
//
// Project: https://github.com/ZoneTool/zonetool
// Author: RektInator (https://github.com/RektInator)
// License: GNU GPL v3.0
// ========================================================
#include "stdafx.hpp"

namespace ZoneTool
{
	namespace IW4
	{
		// LEGACY ZONETOOL CODE, FIX ME!
		class CSV
		{
		protected:
			std::string _name;
			std::vector<std::vector<std::string>> _data;

		public:
			CSV(std::string name, char sep = ',')
				: _name(name)
			{
				auto fp = FileSystem::FileOpen(name, "r"s);

				if (fp)
				{
					long len = FileSystem::FileSize(fp);
					auto buf = std::make_unique<char[]>(len + 1);
					memset(buf.get(), 0, len + 1);
					fread(buf.get(), len, 1, fp);
					fclose(fp);

					std::vector<std::string> rows = split(std::string(buf.get()), '\n');

					for (auto& row : rows)
					{
						// Replace literal characters
						std::size_t pos;
						while ((pos = row.find("\\n")) != std::string::npos)
						{
							row.replace(pos, 2, "\n");
						}

						while ((pos = row.find("\\t")) != std::string::npos)
						{
							row.replace(pos, 2, "\t");
						}

						_data.push_back(split(row, sep));
					}
				}
			}

			std::string entry(std::size_t row, std::size_t column)
			{
				return _data[row][column];
			}

			std::size_t rows()
			{
				return _data.size();
			}

			std::size_t columns(std::size_t row)
			{
				return _data[row].size();
			}

			std::size_t max_columns()
			{
				std::size_t _max = 0;

				for (std::size_t row = 0; row < this->rows(); row++)
				{
					if (_max < this->columns(row))
						_max = this->columns(row);
				}

				return _max;
			}

			void clear()
			{
				for (std::size_t i = 0; i < _data.size(); i++)
				{
					for (std::size_t j = 0; j < _data[i].size(); j++)
						_data[i][j].clear();

					_data[i].clear();
				}

				_data.clear();
			}
		};

		int StringTable_Hash(const char* string)
		{
			int hash = 0;
			char* data = _strdup(string);

			while (*data != 0)
			{
				hash = tolower(*data) + (31 * hash);
				data++;
			}

			return hash;
		}

		StringTable* StringTable_Parse(std::string name, ZoneMemory* mem)
		{
			auto table = std::make_unique<CSV>(name);
			auto* stringtable = mem->Alloc<StringTable>();

			stringtable->name = mem->StrDup(name);
			stringtable->rows = static_cast<int>(table->rows());
			stringtable->columns = static_cast<int>(table->max_columns());
			stringtable->strings = mem->Alloc<StringTableCell>(stringtable->rows * stringtable->columns);

			for (size_t row = 0; row < table->rows(); row++)
			{
				for (size_t col = 0; col < table->columns(row); col++)
				{
					size_t entry = (row * stringtable->columns) + col;
					stringtable->strings[entry].string = mem->StrDup(table->entry(row, col));
					stringtable->strings[entry].hash = StringTable_Hash(stringtable->strings[entry].string);
				}
			}

			return stringtable;
		}

		void IStringTable::init(const std::string& name, ZoneMemory* mem)
		{
			this->name_ = name;
			this->asset_ = DB_FindXAssetHeader(this->type(), this->name().c_str()).stringtable;

			if (FileSystem::FileExists(name))
			{
				ZONETOOL_INFO("Parsing stringtable %s...", name.c_str());
				this->asset_ = StringTable_Parse(name, mem);
			}
		}

		void IStringTable::prepare(ZoneBuffer* buf, ZoneMemory* mem)
		{
		}

		void IStringTable::load_depending(IZone* zone)
		{
		}

		std::string IStringTable::name()
		{
			return this->name_;
		}

		std::int32_t IStringTable::type()
		{
			return stringtable;
		}

		void IStringTable::write(IZone* zone, ZoneBuffer* buf)
		{
			auto* data = this->asset_;
			auto* dest = buf->write(data);

			buf->push_stream(3);
			START_LOG_STREAM;

			dest->name = buf->write_str(this->name());

			if (data->strings)
			{
				buf->align(3);
				auto* dest_strings = buf->write(data->strings, data->columns * data->rows);

				if (data->columns * data->rows > 0)
				{
					for (auto i = 0; i < data->columns * data->rows; i++)
					{
						if (data->strings[i].string)
						{
							dest_strings[i].string = buf->write_str(data->strings[i].string);
						}
					}
				}

				ZoneBuffer::clear_pointer(&dest->strings);
			}

			END_LOG_STREAM;
			buf->pop_stream();
		}

		void IStringTable::dump(StringTable* asset)
		{
			const std::string path = asset->name;
			auto* file = FileSystem::FileOpen(path, "w"s);

			for (auto row = 0; row < asset->rows; row++)
			{
				for (auto column = 0; column < asset->columns; column++)
				{
					fprintf(
						file,
						"%s%s",
						(asset->strings[(row * asset->columns) + column].string)
							? asset->strings[(row * asset->columns) + column].string
							: "",
						(column == asset->columns - 1) ? "\n" : ","
					);
				}
			}

			FileSystem::FileClose(file);
		}
	}
}