#pragma once

#include "config.h"

#include <optional.h>
#include <sparsepp/spp.h>
#include <variant.h>

#include <functional>
#include <mutex>
#include <string>
#include <vector>

// FIXME ipc.h
using lsRequestId = std::variant<std::monostate, int64_t, std::string>;
class QueueManager;
struct WorkingFiles;

struct Project {
  struct Entry {
    std::string filename;
    std::vector<std::string> args;
    // If true, this entry is inferred and was not read from disk.
    bool is_inferred = false;
  };

  // Include directories for "" headers
  std::vector<std::string> quote_include_directories;
  // Include directories for <> headers
  std::vector<std::string> angle_include_directories;

  std::vector<Entry> entries;
  spp::sparse_hash_map<std::string, int> absolute_path_to_entry_index_;

  // Loads a project for the given |directory|.
  //
  // If |config->compilationDatabaseDirectory| is not empty, look for .cquery or
  // compile_commands.json in it, otherwise they are retrieved in
  // |root_directory|.
  // For .cquery, recursive directory listing is used and files with known
  // suffixes are indexed. .cquery files can exist in subdirectories and they will affect
  // flags in their subtrees (relative paths are relative to the project root,
  // not subdirectories).
  // For compile_commands.json, its entries are indexed.
  void Load(Config* config, const std::string& root_directory);

  // Lookup the CompilationEntry for |filename|. If no entry was found this
  // will infer one based on existing project structure.
  Entry FindCompilationEntryForFile(const std::string& filename);

  // Run |action| on every file in the project.
  void ForAllFilteredFiles(
      Config* config,
      std::function<void(int i, const Entry& entry)> action);

  void Index(Config* config,
             QueueManager* queue,
             WorkingFiles* wfiles,
             lsRequestId id);
};