FileHandler.h

#pragma once
#include <string>
#include <cstdint>

namespace FileHandler {

// Read entire file as raw bytes
std::string readFile(const std::string& path);

// Write raw bytes to file
void writeFile(const std::string& path, const std::string& data);

/*
 * Compressed file format (.bin):
 *
 * [4 bytes]  magic: "HUFF"
 * [4 bytes]  tree_size  (uint32, big-endian)
 * [tree_size bytes] serialized Huffman tree
 * [4 bytes]  padding_bits (uint32) — how many trailing bits to ignore
 * [4 bytes]  original_size (uint32) — original file size in bytes
 * [rest]     packed bit data (8 bits per byte)
 */

// Pack bit string → bytes and write full compressed file
void writeCompressed(const std::string& path,
                     const std::string& treeData,
                     const std::string& bits,
                     uint32_t originalSize);

// Read compressed file → treeData + bits
void readCompressed(const std::string& path,
                    std::string& treeData,
                    std::string& bits,
                    uint32_t& originalSize);

} // namespace FileHandler