#pragma once

#include <cstddef>        // Para size_t
#include <cstdint>        // Para uint8_t, uint32_t, uint64_t
#include <string>         // Para string, basic_string, hash
#include <unordered_map>  // Para unordered_map
#include <vector>         // Para vector

struct ResourceEntry {
    std::string filename;
    uint64_t offset;
    uint64_t size;
    uint32_t checksum;
};

class ResourcePack {
   private:
    std::unordered_map<std::string, ResourceEntry> resources_;
    std::vector<uint8_t> data_;
    bool loaded_;

    static auto calculateChecksum(const std::vector<uint8_t>& data) -> uint32_t;
    static void encryptData(std::vector<uint8_t>& data, const std::string& key);
    static void decryptData(std::vector<uint8_t>& data, const std::string& key);

   public:
    ResourcePack();
    ~ResourcePack();

    auto loadPack(const std::string& pack_file) -> bool;
    auto savePack(const std::string& pack_file) -> bool;

    auto addFile(const std::string& filename, const std::string& filepath) -> bool;
    auto addDirectory(const std::string& directory) -> bool;

    [[nodiscard]] auto getResource(const std::string& filename) -> std::vector<uint8_t>;
    [[nodiscard]] auto hasResource(const std::string& filename) const -> bool;

    void clear();
    [[nodiscard]] auto getResourceCount() const -> size_t;
    [[nodiscard]] auto getResourceList() const -> std::vector<std::string>;

    static const std::string DEFAULT_ENCRYPT_KEY;
};