/******************************************************************/
/* This file is part of the homework assignments for CSCI-427/527 */
/* at The College of William & Mary and authored by Pieter Peers. */
/* No part of this file, whether altered or in original form, can */
/* be distributed or used outside the context of CSCI-427/527     */
/* without consent of either the College of William & Mary or     */
/* Pieter Peers.                                                  */
/******************************************************************/
#ifndef _IMAGE_H_
#define _IMAGE_H_

#include <string>
#include <memory>
#include <ostream>

#include "color.h"

class image {
 public:
  //////////////
  // Typedefs //
  //////////////
  typedef color                                         value_type;
  typedef value_type&                                   reference;
  typedef const value_type&                             const_reference;
  typedef std::unique_ptr<value_type[]>::pointer        iterator;
  typedef std::unique_ptr<const value_type[]>::pointer  const_iterator;
  typedef size_t                                        difference_type;
  typedef size_t                                        size_type;

  //////////////////
  // Constructors //
  //////////////////
  image(size_type width=0, size_type height=0);
  image(size_type width, size_type height, const_reference col);
  image(const image& src);
  image(image&& src);

  virtual ~image(void) { _data.reset(); }

  ////////////////
  // Inspectors //
  ////////////////
  iterator begin(void);
  const_iterator begin(void) const;
  
  iterator end(void);
  const_iterator end(void) const;

  size_type size(void) const   { return width()*height(); }
  size_type width(void) const  { return _width; }
  size_type height(void) const { return _height; }


  ///////////////
  // Operators //
  ///////////////
  image& operator=(const image& src);
  image& operator=(image&& src);

  reference operator()(size_type x, size_type y);
  const_reference operator()(size_type x, size_type y) const;

  /////////////
  // Friends //
  /////////////
  friend void swap(image& a, image& b) { a._swap(b); }
  friend std::ostream& operator<<(std::ostream& s, const image& img)
  {
    s << "Image: (" << img.width() << ", " << img.height() << ")";
    return s;
  }

protected:
  /////////////////////
  // Private Methods //
  /////////////////////
  void _swap(image& img);
  void _assign(const image& src);

private:
  //////////////////////////
  // Private Data Members //
  //////////////////////////
  size_type _width, _height;
  std::unique_ptr<value_type[]> _data;
};

#endif /* _IMAGE_H_ */