#ifndef GERMANAIRLINESVA_FILE_SIMULATORDATABASE_H
#define GERMANAIRLINESVA_FILE_SIMULATORDATABASE_H

#include <cstdint>
#include <fstream>
#include <iostream>
#include <map>
#include <string>
#include <utility>
#include <vector>

#include "simdata/gate.h"
#include "simdata/runway.h"

/*
 * Header
 *
 * CHAR[5] | UINT8
 * --------+--------
 * VGAS    | VERSION
 */
/*
 * Airport
 *
 * UINT8  | CHAR[] | UINT16   | GATE[] | UINT8   | RUNWAY[]
 * --------+--------+----------+--------+---------+---------
 * STRLEN | ICAO   | NUMGATES | GATES  | NUMRWYS | RUNWAYS
 */

namespace germanairlinesva
{
namespace file
{
  namespace simdata
  {
    static inline void toFile(
        std::map<
            std::string,
            std::pair<std::vector<germanairlinesva::file::simdata::Gate>,
                      std::vector<germanairlinesva::file::simdata::Runway>>>
            &airports,
        const std::string &file)
    {
      std::uint8_t null = 0;
      std::ofstream out(file, std::fstream::binary);

      // File Header, Last member is version
      std::uint8_t header[] = {'V', 'G', 'A', 'S', '\0', 1};
      out.write(reinterpret_cast<const char *>(header), 6);
      // Num Airports
      std::uint16_t numAirports = airports.size();
      out.write(reinterpret_cast<const char *>(&numAirports),
                sizeof(numAirports));
      // Airport
      for (const std::pair<
               const std::string,
               std::pair<std::vector<germanairlinesva::file::simdata::Gate>,
                         std::vector<germanairlinesva::file::simdata::Runway>>>
               &airport : airports) {
        std::string icao = airport.first;
        std::vector<germanairlinesva::file::simdata::Gate> gates =
            airport.second.first;
        std::vector<germanairlinesva::file::simdata::Runway> runways =
            airport.second.second;
        // ICAO
        std::uint8_t icaoLength = icao.length();
        out.write(reinterpret_cast<const char *>(&icaoLength),
                  sizeof(icaoLength));
        out.write(icao.c_str(), icaoLength);
        out.write(reinterpret_cast<const char *>(&null), sizeof(null));
        // Gates
        std::uint16_t numGates = gates.size();
        out.write(reinterpret_cast<const char *>(&numGates), sizeof(numGates));
        for (germanairlinesva::file::simdata::Gate &gate : gates) {
          gate.toFile(out);
        }
        // Runways
        std::uint8_t numRunways = runways.size();
        out.write(reinterpret_cast<const char *>(&numRunways),
                  sizeof(numRunways));
        for (germanairlinesva::file::simdata::Runway &runway : runways) {
          runway.toFile(out);
        }
      }
      out.close();
    }

    static inline std::map<
        std::string,
        std::pair<std::vector<germanairlinesva::file::simdata::Gate>,
                  std::vector<germanairlinesva::file::simdata::Runway>>>
        readVersion1(std::ifstream &in)
    {
      std::map<std::string,
               std::pair<std::vector<germanairlinesva::file::simdata::Gate>,
                         std::vector<germanairlinesva::file::simdata::Runway>>>
          airports;

      std::uint16_t numAirports;
      in.read(reinterpret_cast<char *>(&numAirports), sizeof(numAirports));

      for (int i = 0; i < numAirports; i++) {
        // ICAO
        std::uint8_t icaoLength;
        in.read(reinterpret_cast<char *>(&icaoLength), sizeof(icaoLength));
        char *icao = static_cast<char *>(calloc(icaoLength + 1, sizeof(char)));
        in.read(icao, icaoLength + 1);
        // Gates
        std::uint16_t numGates;
        in.read(reinterpret_cast<char *>(&numGates), sizeof(numGates));
        for (int j = 0; j < numGates; j++) {
          std::string designator = readString(in);
          struct germanairlinesva::geodata::point center =
              read<struct germanairlinesva::geodata::point>(in);
          std::uint8_t radius = read<std::uint8_t>(in);

          airports[icao].first.emplace_back(designator, center, radius);
        }
        // Runways
        std::uint8_t numRunways;
        in.read(reinterpret_cast<char *>(&numRunways), sizeof(numRunways));
        for (int j = 0; j < numRunways; j++) {
          std::string designator = readString(in);
          // Bounds
          struct germanairlinesva::geodata::box bounds =
              read<struct germanairlinesva::geodata::box>(in);
          std::uint8_t width = read<std::uint8_t>(in);
          std::uint16_t length = read<std::uint16_t>(in);
          std::uint16_t trueHeading = read<std::uint16_t>(in);

          airports[icao].second.emplace_back(designator,
                                             bounds,
                                             width,
                                             length,
                                             trueHeading);
        }
      }

      in.close();

      return airports;
    }

    static inline std::map<
        std::string,
        std::pair<std::vector<germanairlinesva::file::simdata::Gate>,
                  std::vector<germanairlinesva::file::simdata::Runway>>>
        fromFile(const std::string &file)
    {
      std::map<std::string,
               std::pair<std::vector<germanairlinesva::file::simdata::Gate>,
                         std::vector<germanairlinesva::file::simdata::Runway>>>
          airports;
      std::ifstream in(file, std::ifstream::binary);

      // File Header
      char ident[5];
      in.read(ident, 5);
      if (strcmp(ident, "VGAS") != 0) {
        throw std::invalid_argument("Wrong file");
      }
      std::uint8_t version;
      in.read(reinterpret_cast<char *>(&version), 1);

      if (version == 1) {
        return readVersion1(in);
      }
      return airports;
    }
  } // namespace simdata
} // namespace file
} // namespace germanairlinesva

#endif