#ifndef _GSM_LOAD_GRAPH_H_
#define _GSM_LOAD_GRAPH_H_

#include <glib.h>
#include <glibtop/cpu.h>

#include "legacy/gsm_color_button.h"
#include "util.h"
#include "settings-keys.h"

enum
{
  LOAD_GRAPH_CPU,
  LOAD_GRAPH_MEM,
  LOAD_GRAPH_NET
};

enum
{
  CPU_TOTAL,
  CPU_USED,
  N_CPU_STATES
};

struct LoadGraphLabels
{
  GtkLabel *cpu[GLIBTOP_NCPU];
  GtkLabel *memory;
  GtkLabel *swap;
  GtkLabel *net_in;
  GtkLabel *net_in_total;
  GtkLabel *net_out;
  GtkLabel *net_out_total;
};

struct LoadGraph
  : private procman::NonCopyable
{
  LoadGraph(guint type);
  ~LoadGraph();

  unsigned num_bars () const;
  void     clear_background ();
  bool     is_logarithmic_scale () const;
  char *   get_caption (guint index);
  float    translate_to_log_partial_if_needed (float position_partial);

  double fontsize;
  double rmargin;
  /* left margin */
  double indent;

  guint n;
  gint type;
  guint speed;
  guint num_points;
  guint latest;
  guint draw_width, draw_height;
  guint render_counter;
  guint frames_per_unit;
  guint graph_dely;
  guint real_draw_height;
  guint graph_delx;
  guint graph_buffer_offset;

  std::vector<GdkRGBA> colors;

  std::vector<double> data_block;
  std::vector<double*> data;

  GtkBox *main_widget;
  GtkDrawingArea *disp;

  cairo_surface_t *background;

  guint timer_index;

  gboolean draw;

  LoadGraphLabels labels;
  GsmColorButton *mem_color_picker;
  GsmColorButton *swap_color_picker;

  Glib::RefPtr<Gio::Settings> font_settings;

  /* union { */
  struct CPU
  {
    guint now;     /* 0 -> current, 1 -> last
                      now ^ 1 each time */
    /* times[now], times[now ^ 1] is last */
    guint64 times[2][GLIBTOP_NCPU][N_CPU_STATES];
  } cpu;

  struct NET
  {
    guint64 last_in, last_out;
    guint64 last_hash;
    guint64 time;
    guint64 max;
    std::vector<unsigned> values;
  } net;
  /* }; */
};

/* Force a drawing update */
void
load_graph_queue_draw (LoadGraph *g);

/* Start load graph. */
void
load_graph_start (LoadGraph *g);

/* Stop load graph. */
void
load_graph_stop (LoadGraph *g);

/* Change load graph speed and restart it if it has been previously started */
void
load_graph_change_speed (LoadGraph *g,
                         guint      new_speed);

/* Change load graph data points and restart it if it has been previously started */
void
load_graph_change_num_points (LoadGraph *g,
                              guint      new_num_points);

/* Clear the history data. */
void
load_graph_reset (LoadGraph *g);

LoadGraphLabels*
load_graph_get_labels (LoadGraph *g) G_GNUC_CONST;

GtkBox*
load_graph_get_widget (LoadGraph *g) G_GNUC_CONST;

GsmColorButton*
load_graph_get_mem_color_picker (LoadGraph *g) G_GNUC_CONST;

GsmColorButton*
load_graph_get_swap_color_picker (LoadGraph *g) G_GNUC_CONST;

#endif /* _GSM_LOAD_GRAPH_H_ */
