#ifndef MONITOR_HH
#define MONITOR_HH

#include <cstdint>
#include <memory>
#include <string>

class Looper;

class Monitor {
public:
  enum State {
    SEARCHING,
    CONNECTED,
  };

  struct Machine {
    std::string name;
    unsigned max_jobs;

    Machine()
      : max_jobs(0) {
    }
  };

  class Observer {
  public:
    virtual ~Observer() {}
    virtual void state(Monitor* monitor, State state) = 0;
    virtual void added_machine(Monitor* monitor, uint32_t id) = 0;
    virtual void updated_machine(Monitor* monitor, uint32_t id) = 0;
    virtual void removed_machine(Monitor* monitor, uint32_t id) = 0;
    virtual void added_job(Monitor* monitor, uint32_t source_id,
                           uint32_t target_id) = 0;
    virtual void removed_job(Monitor* monitor, uint32_t source_id,
                             uint32_t target_id) = 0;

  protected:
    Observer() {}
  };

  virtual ~Monitor() {}

  static std::unique_ptr<Monitor> create(std::shared_ptr<Looper> const& looper);

  virtual void connect(std::string const& netname = std::string(),
                       std::string const& scheduler = std::string(),
                       uint16_t port = 0) = 0;
  virtual void disconnect() = 0;
  virtual size_t machines() const = 0;
  virtual uint32_t id(size_t index) const = 0;
  virtual Machine machine_at(size_t index) const = 0;
  virtual Machine machine(uint32_t id) const = 0;

  virtual void add_observer(Observer* observer) = 0;
  virtual void remove_observer(Observer* observer) = 0;

#if FAKE_MONITOR
  virtual void toggle_fakes() = 0;
#endif

protected:
  Monitor() {}
  Monitor(Monitor const&) = delete;
  Monitor& operator=(Monitor const&) = delete;
};

#endif  // MONITOR_HH