// Copyright 2016 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef PRINTING_BACKEND_CUPS_CONNECTION_H_
#define PRINTING_BACKEND_CUPS_CONNECTION_H_

#include <cups/cups.h>

#include <memory>
#include <string>
#include <vector>

#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "printing/backend/cups_deleters.h"
#include "printing/backend/cups_printer.h"
#include "printing/printing_export.h"
#include "url/gurl.h"

namespace printing {

// Represents a print job sent to the queue.
struct PRINTING_EXPORT CupsJob {
  enum JobState {
    UNKNOWN,
    PENDING,
    HELD,
    COMPLETED,
    PROCESSING,
    STOPPED,
    CANCELED,
    ABORTED
  };

  int id;
  std::string title;
  std::string printer_id;
  JobState state;
};

// Represents a connection to a CUPS server.
class PRINTING_EXPORT CupsConnection {
 public:
  CupsConnection(const GURL& print_server_url,
                 http_encryption_t encryption,
                 bool blocking);

  CupsConnection(CupsConnection&& connection);

  ~CupsConnection();

  // Returns a vector of all the printers configure on the CUPS server.
  std::vector<CupsPrinter> GetDests();

  // Returns a printer for |printer_name| from the connected server.
  std::unique_ptr<CupsPrinter> GetPrinter(const std::string& printer_name);

  // Returns a list of print jobs from all connected printers.
  std::vector<CupsJob> GetJobs();

  std::string server_name() const;

  int last_error() const;

 private:
  // lazily initialize http connection
  bool Connect();

  GURL print_server_url_;
  http_encryption_t cups_encryption_;
  bool blocking_;

  std::unique_ptr<http_t, HttpDeleter> cups_http_;

  DISALLOW_COPY_AND_ASSIGN(CupsConnection);
};

}  // namespace printing

#endif  // PRINTING_BACKEND_CUPS_CONNECTION_H_