#include <clippy/project_list.hpp>
#include <filesystem>
#include <utils/lock_file.hpp>

#include <fstream>
#include <mutex>

#include <iostream>

void ProjectList::LoadFrom(const std::string& path) {
  utils::filesystem::LockFile lock(path);
  std::lock_guard guard(lock);

  std::ifstream in(path);

  Project current;

  while (in >> current.root_project >> current.configuration_file) {
    projects_.push_back(current);
  }
}

std::optional<Project> ProjectList::GetCurrentProject() {
  auto current_path = std::filesystem::current_path();

  std::optional<Project> result;
  auto UpdateResult = [&result](Project p) {
    if (!result.has_value()) {
      result = p;
    } else {
      result = std::max(p, result.value());
    }
  };

  for (auto& project : projects_) {
    auto prefix_current_path = current_path;

    if (project.root_project == "/") {
      UpdateResult(project);
      continue;
    }

    while (prefix_current_path != "/") {
      if (prefix_current_path == project.root_project) {
        UpdateResult(project);
      }
      prefix_current_path = prefix_current_path.parent_path();
    }
  }

  return result;
}