#pragma once

#include <modulus/types.hpp>
#include <cstddef>
#include <cstdint>
#include <string_view>


namespace vamp_protocol {

constexpr std::char_t root_path[] = "/";
constexpr std::char_t status_path[] = "/api/status";
constexpr std::char_t remote_next_path[] = "/api/remote/next";
constexpr std::char_t remote_previous_path[] = "/api/remote/previous";
constexpr std::char_t remote_select_path[] = "/api/remote/select";
constexpr std::char_t remote_heartbeat_path[] = "/api/remote/heartbeat";
constexpr std::char_t remote_display_path[] = "/api/remote/display";
constexpr std::char_t remote_title_path[] = "/api/remote/title";
constexpr auto title_width = std::size_t{296};
constexpr auto title_height = std::size_t{64};
constexpr auto title_header_size = std::size_t{8};
constexpr auto title_image_size = title_header_size + title_width * title_height / 2U;
constexpr auto title_id_size = std::size_t{64};

inline auto valid_title_id(std::string_view value) -> std::bool_t {
  if (value.size() != title_id_size) {
    return false;
  }
  for (auto character : value) {
    if (!((character >= '0' && character <= '9') || (character >= 'a' && character <= 'f'))) {
      return false;
    }
  }
  return true;
}

// VPTI, little-endian uint16 dimensions, then row-major coverage, high nibble first.

inline auto valid_title_image(std::string_view bytes) -> std::bool_t {
  return bytes.size() == title_image_size && bytes.substr(0U, 4U) == "VPTI" &&
         static_cast<std::uint8_t>(bytes[4]) == (title_width & 255U) &&
         static_cast<std::uint8_t>(bytes[5]) == (title_width >> 8U) &&
         static_cast<std::uint8_t>(bytes[6]) == title_height && bytes[7] == 0;
}

enum class page_command {
  PREVIOUS,
  NEXT,
  SELECT,
};

auto page_command_path(vamp_protocol::page_command command) -> std::char_t const *;
auto page_command_name(vamp_protocol::page_command command) -> std::char_t const *;
auto page_command_display_label(vamp_protocol::page_command command) -> std::char_t const *;

}