#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);
        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;

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

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

        static const std::string DEFAULT_ENCRYPT_KEY;
};