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// Handwriting module manager class

#ifndef MOZC_HANDWRITING_HANDWRITING_MANAGER_H_
#define MOZC_HANDWRITING_HANDWRITING_MANAGER_H_

#include <string>
#include <vector>

#include "base/port.h"

namespace mozc {
namespace handwriting {

enum HandwritingStatus {
  HANDWRITING_NO_ERROR,
  HANDWRITING_ERROR,
  HANDWRITING_NETWORK_ERROR,
  HANDWRITING_UNKNOWN_ERROR,
};

// A coordinate of a stroke.  If the canvas is a square, the point
// range is supporsed from 0.0 to 1.0.
typedef std::pair<float, float> Point;
typedef std::vector<Point> Stroke;
typedef std::vector<Stroke> Strokes;

class HandwritingInterface {
 public:
  HandwritingInterface() {}
  virtual ~HandwritingInterface() {}

  virtual HandwritingStatus Recognize(
      const Strokes &strokes, std::vector<string> *candidates) const = 0;

  virtual HandwritingStatus Commit(const Strokes &strokes,
                                   const string &result) = 0;

 private:
  DISALLOW_COPY_AND_ASSIGN(HandwritingInterface);
};

class HandwritingManager {
 public:
  // Set a handwriting module inheriting HandwritingInterface.  The
  // owner of the module should be the caller of this function.
  static void SetHandwritingModule(HandwritingInterface *module);

  static HandwritingStatus Recognize(const Strokes &strokes,
                                     std::vector<string> *candidates);
  static HandwritingStatus Commit(const Strokes &strokes, const string &result);

 private:
  DISALLOW_IMPLICIT_CONSTRUCTORS(HandwritingManager);
};

}  // namespace handwriting
}  // namespace mozc

#endif  // MOZC_HANDWRITING_HANDWRITING_MANAGER_H_