#pragma once

#include <expected>
#include <functional>
#include <memory>
#include <string>
#include <vector>

#include <luma.hpp>

#include <vamp_zero/types.hpp>


namespace vamp_zero {

class score_page_cache {
public:
  explicit score_page_cache(std::function<std::expected<std::shared_ptr<luma::texture>, modulus::error>(std::string const &)> loader);
  auto get(std::string path) -> std::expected<std::shared_ptr<luma::texture>, modulus::error>;
  auto clear() -> void;
  auto size() const -> std::size_t;
private:
  struct entry {
    std::string path{};
    std::shared_ptr<luma::texture> texture{};
  };
  std::function<std::expected<std::shared_ptr<luma::texture>, modulus::error>(std::string const &)> loader_{};
  std::vector<entry> entries_{};
};

auto score_page_count(vamp_zero::score_document const &score) -> std::size_t;
auto validated_page_path(vamp_zero::score_document const &score, std::size_t index) -> std::expected<std::string, modulus::error>;
auto validate_score_page(vamp_zero::score_document const &score, std::size_t index) -> std::expected<void, modulus::error>;

}