#pragma once

#include <cstdint>
#include <functional>
#include <string>
#include <vector>

#include "openpilot/cereal/gen/cpp/log.capnp.h"
#include "tools/replay/util.h"

const CameraType ALL_CAMERAS[] = {NarrowRoadCam, CabinCam, WideRoadCam};
const int MAX_CAMERAS = std::size(ALL_CAMERAS);

class Event {
public:
  Event(cereal::Event::Which which, uint64_t mono_time, const kj::ArrayPtr<const capnp::word> &data, int eidx_segnum = -1)
    : which(which), mono_time(mono_time), data(data), eidx_segnum(eidx_segnum) {}

  bool operator<(const Event &other) const {
    return mono_time < other.mono_time || (mono_time == other.mono_time &&
           (which < other.which || (which == other.which && eidx_segnum < other.eidx_segnum)));
  }

  uint64_t mono_time;
  cereal::Event::Which which;
  kj::ArrayPtr<const capnp::word> data;
  int32_t eidx_segnum;
};

inline bool boot_clock_event(cereal::Event::Which which) {
  switch (which) {
    case cereal::Event::Which::INIT_DATA:
    case cereal::Event::Which::SENTINEL:
    case cereal::Event::Which::PANDA_STATES:
    case cereal::Event::Which::NARROW_ROAD_CAMERA_STATE:
    case cereal::Event::Which::WIDE_ROAD_CAMERA_STATE:
    case cereal::Event::Which::CABIN_CAMERA_STATE:
    case cereal::Event::Which::NARROW_ROAD_ENCODE_IDX:
    case cereal::Event::Which::WIDE_ROAD_ENCODE_IDX:
    case cereal::Event::Which::CABIN_ENCODE_IDX: return true;
    default: return false;
  }
}

class LogReader {
public:
  enum class ProgressStage {
    Downloading,
    Parsing,
  };

  using ProgressCallback = std::function<void(ProgressStage stage, uint64_t current, uint64_t total)>;

  LogReader(const std::vector<bool> &filters = {}, size_t max_bytes = 0, int64_t boot_offset = -1)
      : filters_(filters), max_bytes_(max_bytes), boot_offset_(boot_offset) {}
  bool load(const std::string &url, std::atomic<bool> *abort = nullptr,
            bool local_cache = false, const ProgressCallback &progress = {});
  bool load(const char *data, size_t size, std::atomic<bool> *abort = nullptr,
            const ProgressCallback &progress = {});
  std::vector<Event> events;

  uint64_t compressed_size() const { return compressed_size_; }
  uint64_t decompressed_size() const { return decompressed_size_; }
  double download_seconds() const { return download_seconds_; }
  double decompress_seconds() const { return decompress_seconds_; }
  double parse_seconds() const { return parse_seconds_; }
  bool corrupt() const { return corrupt_; }
  uint64_t lastMonoTime() const { return last_mono_time_; }

private:
  bool parse(std::atomic<bool> *abort, const ProgressCallback &progress);
  void migrateOldEvents();

  std::string raw_;  // Owns the serialized bytes referenced by events.
  bool requires_migration = true;
  std::vector<bool> filters_;
  size_t max_bytes_ = 0;
  int64_t boot_offset_ = -1;
  bool corrupt_ = false;
  uint64_t last_mono_time_ = 0;
  MonotonicBuffer buffer_{1024 * 1024};
  uint64_t compressed_size_ = 0;
  uint64_t decompressed_size_ = 0;
  double download_seconds_ = 0.0;
  double decompress_seconds_ = 0.0;
  double parse_seconds_ = 0.0;
};