/* ========================================================================
 *
 *     Filename:  main.cpp
 *  Description:  data file renderer
 *       Author:  Diego Estrada
 *      Version:  0.0.1
 *
 * ======================================================================== */
#include <functional>
#include <ranges>
#include <algorithm>
#include <array>
#include <cstdint>
#include <fstream>
#include <iostream>
#include <iterator>
#include <numeric>
#include <optional>
#include <vector>

namespace ra = std::ranges;
namespace vi = ra::views;

template <typename T> using ref = T&;

template <typename T> using ptr = T*;

struct Bytes {
	std::vector<uint8_t> bytes;

	auto read_file(ref<const std::string> file_path)
	{
		auto input = std::ifstream(file_path, std::ios::binary);

		bytes = std::vector<uint8_t>(
		    (std::istreambuf_iterator<char>(input)),
		    (std::istreambuf_iterator<char>()));

		input.close();
	}
};

template<size_t _rows, size_t _cols>
struct Map {
	std::vector<char> map;

	Map()
	{
		for (auto& e : map) e = ' ';
	}

	auto operator () (size_t x, size_t y, char c)
	{
		std::cout << (x & 0xFF) << ' ' << y << '\n';
		if (x < _rows && y < _cols)
			map[x + (y * _cols)] = c;
	}

	auto rows() const -> size_t
	{
		return _rows;
	}

	auto cols() const -> size_t
	{
		return _cols;
	}
};

struct Graph {
	Map<0xFF, 0xFF> mp;
	Graph(ref<const Bytes> b) : mp()
	{
		auto view = vi::slide(b.bytes, 2);

		auto const mapper = [this](ra::viewable_range auto&& r) {
			std::cout << r.size() << std::endl;
			[[maybe_unused]] auto const i = r[0];
			[[maybe_unused]] auto const j = r[1];
			mp(i & 0xFF, j & 0xFF, '.');
		};

		ra::for_each(view, mapper);
	}

	auto show() const -> void
	{
		for(size_t i = 0; i < mp.map.size(); ++i) {
			if (i % mp.cols() == 0)
				std::cout << std::endl;
			std::cout << mp.map.at(i);
		}
	}
};

auto main([[maybe_unused]] int argc, [[maybe_unused]] char** argv) -> int
{

	auto k = Bytes();

	// k.read_file("Makefile");
	k.read_file("/home/Michorron/Media/Pictures/Wallpapers/totoro.jpeg");

	auto g = Graph(k);

	g.show();

	return 0;
}