#include <stdlib.h>
#include <stdbool.h>
#include <gtk/gtk.h>
#include <alsa/asoundlib.h>
#include <math.h>
#include <fftw3.h>

#include "common.h"

void createGUI() {

  GtkBuilder *builder;
  GtkWidget  *quititem,  *aboutitem,  *prefitem;
  GtkWidget  *mainwindow, *aboutdialog, *prefdialog;

  builder = gtk_builder_new();
  gtk_builder_add_from_file(builder, "slowrx.ui",      NULL);
  gtk_builder_add_from_file(builder, "aboutdialog.ui", NULL);
  gtk_builder_add_from_file(builder, "prefs.ui",       NULL);

  mainwindow  = GTK_WIDGET(gtk_builder_get_object(builder,"mainwindow"));
  aboutdialog = GTK_WIDGET(gtk_builder_get_object(builder,"aboutdialog"));
  prefdialog  = GTK_WIDGET(gtk_builder_get_object(builder,"prefdialog"));

  quititem    = GTK_WIDGET(gtk_builder_get_object(builder,"quititem"));
  prefitem    = GTK_WIDGET(gtk_builder_get_object(builder,"prefmenuitem"));
  aboutitem   = GTK_WIDGET(gtk_builder_get_object(builder,"aboutitem"));

  vugrid      = GTK_WIDGET(gtk_builder_get_object(builder,"vugrid"));
  RxImage     = GTK_WIDGET(gtk_builder_get_object(builder,"RxImage"));
  statusbar   = GTK_WIDGET(gtk_builder_get_object(builder,"statusbar"));
  infolabel   = GTK_WIDGET(gtk_builder_get_object(builder,"infolabel"));
  cardcombo   = GTK_WIDGET(gtk_builder_get_object(builder,"cardcombo"));
  togslant    = GTK_WIDGET(gtk_builder_get_object(builder,"TogSlant"));
  togsave     = GTK_WIDGET(gtk_builder_get_object(builder,"TogSave"));
  togadapt    = GTK_WIDGET(gtk_builder_get_object(builder,"TogAdapt"));
  togrx       = GTK_WIDGET(gtk_builder_get_object(builder,"TogRx"));
  togfsk      = GTK_WIDGET(gtk_builder_get_object(builder,"TogFSK"));
  modecombo   = GTK_WIDGET(gtk_builder_get_object(builder,"modecombo"));
  btnabort    = GTK_WIDGET(gtk_builder_get_object(builder,"BtnAbort"));
  btnstart    = GTK_WIDGET(gtk_builder_get_object(builder,"BtnStart"));
  manualframe = GTK_WIDGET(gtk_builder_get_object(builder,"ManualFrame"));
  shiftspin   = GTK_WIDGET(gtk_builder_get_object(builder,"ShiftSpin"));
  pwrimage    = GTK_WIDGET(gtk_builder_get_object(builder,"PowerImage"));
  snrimage    = GTK_WIDGET(gtk_builder_get_object(builder,"SNRImage"));
  idlabel     = GTK_WIDGET(gtk_builder_get_object(builder,"IDLabel"));
  GtkWidget *iconview;
  iconview    = GTK_WIDGET(gtk_builder_get_object(builder,"SavedIconView"));

  g_signal_connect        (quititem,    "activate",     G_CALLBACK(delete_event),        NULL);
  g_signal_connect        (mainwindow,  "delete-event", G_CALLBACK(delete_event),        NULL);
  g_signal_connect_swapped(aboutitem,   "activate",     G_CALLBACK(gtk_widget_show_all), aboutdialog);
  g_signal_connect_swapped(prefitem,    "activate",     G_CALLBACK(gtk_widget_show_all), prefdialog);
  g_signal_connect_swapped(aboutdialog, "close",        G_CALLBACK(gtk_widget_hide),     aboutdialog);
  g_signal_connect_swapped(togadapt,    "toggled",      G_CALLBACK(GetAdaptive),         NULL);
  g_signal_connect        (btnstart,    "clicked",      G_CALLBACK(ManualStart),         NULL);
  g_signal_connect        (btnabort,    "clicked",      G_CALLBACK(AbortRx),             NULL);

  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(togslant), true);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(togsave),  true);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(togadapt), true);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(togrx),    true);
  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(togfsk),   true);
  gtk_combo_box_set_active    (GTK_COMBO_BOX(modecombo),    0);
  gtk_widget_set_sensitive    (btnabort,                    false);

  savedstore = gtk_list_store_new (2, GDK_TYPE_PIXBUF, G_TYPE_STRING);
  gtk_icon_view_set_model (GTK_ICON_VIEW(iconview), GTK_TREE_MODEL(savedstore));
  gtk_icon_view_set_pixbuf_column (GTK_ICON_VIEW(iconview), 0);
  gtk_icon_view_set_text_column (GTK_ICON_VIEW(iconview), 1);

  RxPixbuf   = gdk_pixbuf_new (GDK_COLORSPACE_RGB, false, 8, 320, 256);
  gdk_pixbuf_fill(RxPixbuf, 0);
  DispPixbuf = gdk_pixbuf_scale_simple (RxPixbuf, 500, 400, GDK_INTERP_BILINEAR);
  gtk_image_set_from_pixbuf(GTK_IMAGE(RxImage), DispPixbuf);

  pixbufPWR = gdk_pixbuf_new (GDK_COLORSPACE_RGB, false, 8, 100, 20);
  pixbufSNR = gdk_pixbuf_new (GDK_COLORSPACE_RGB, false, 8, 100, 20);

  setVU(0, -100);

  gtk_widget_show_all  (mainwindow);

}

// Draw signal level meters according to given values
void setVU (short int PcmValue, double SNRdB) {
  int x,y;
  int PWRdB = (int)round(10 * log10(pow(PcmValue/32767.0,2)));
  guchar *pixelsPWR, *pixelsSNR, *pPWR, *pSNR;
  unsigned int rowstridePWR,rowstrideSNR;

  rowstridePWR = gdk_pixbuf_get_rowstride (pixbufPWR);
  pixelsPWR    = gdk_pixbuf_get_pixels    (pixbufPWR);
  
  rowstrideSNR = gdk_pixbuf_get_rowstride (pixbufSNR);
  pixelsSNR    = gdk_pixbuf_get_pixels    (pixbufSNR);

  for (y=0; y<20; y++) {
    for (x=0; x<100; x++) {

      pPWR = pixelsPWR + y * rowstridePWR + (99-x) * 3;
      pSNR = pixelsSNR + y * rowstrideSNR + (99-x) * 3;

      if (y > 1 && y < 18 && x % 10 > 1 && x % 10 < 8 && x % 2 == 0 && y % 2 == 0) {

        if (PWRdB >= PWRdBthresh[x/10]) {
          pPWR[0] = 0x59;
          pPWR[1] = 0xfe;
          pPWR[2] = 0xf4;
        } else {
          pPWR[0] = pPWR[1] = pPWR[2] = 0x80;
        }

        if (SNRdB >= SNRdBthresh[x/10]) {        
          pSNR[0] = 0xef;
          pSNR[1] = 0xe4;
          pSNR[2] = 0x34;
        } else {
          pSNR[0] = pSNR[1] = pSNR[2] = 0x80;
        }

      } else {
        pPWR[0] = pPWR[1] = pPWR[2] = 0x40;
        pSNR[0] = pSNR[1] = pSNR[2] = 0x40;
      }

    }
  }

  gdk_threads_enter();
  gtk_image_set_from_pixbuf(GTK_IMAGE(pwrimage), pixbufPWR);
  gtk_image_set_from_pixbuf(GTK_IMAGE(snrimage), pixbufSNR);
  gdk_threads_leave();

}