#define GTK_FILE_SYSTEM_ENABLE_UNSUPPORTED

#include <config.h>
#include <glib/gprintf.h>
#include <gtk/gtk.h>
#include "gtk/gtkfilechooserprivate.h"
#include "gtk/gtkfilechooserdefault.h"
#include "gtk/gtkfilechooserentry.h"

static void
log_test (gboolean passed, const char *test_name, ...)
{
  va_list args;
  char *str;

  va_start (args, test_name);
  str = g_strdup_vprintf (test_name, args);
  va_end (args);

  g_printf ("%s: %s\n", passed ? "PASSED" : "FAILED", str);
  g_free (str);
}

static const GtkFileChooserAction open_actions[] = {
  GTK_FILE_CHOOSER_ACTION_OPEN,
  GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER
};

static const GtkFileChooserAction save_actions[] = {
  GTK_FILE_CHOOSER_ACTION_SAVE,
  GTK_FILE_CHOOSER_ACTION_CREATE_FOLDER
};


static gboolean
has_action (const GtkFileChooserAction *actions,
	    int n_actions,
	    GtkFileChooserAction sought_action)
{
  int i;

  for (i = 0; i < n_actions; i++)
    if (actions[i] == sought_action)
      return TRUE;

  return FALSE;
}

static const char *
get_action_name (GtkFileChooserAction action)
{
  GEnumClass *enum_class;
  GEnumValue *enum_value;

  enum_class = g_type_class_peek (GTK_TYPE_FILE_CHOOSER_ACTION);
  if (!enum_class)
    g_error ("BUG: get_action_name(): no GEnumClass for GTK_TYPE_FILE_CHOOSER_ACTION");

  enum_value = g_enum_get_value (enum_class, (int) action);
  if (!enum_value)
    g_error ("BUG: get_action_name(): no GEnumValue for GtkFileChooserAction %d", (int) action);

  return enum_value->value_name;
}

static gboolean
test_widgets_for_current_action (GtkFileChooserDialog *dialog,
				 GtkFileChooserAction  expected_action)
{
  GtkFileChooserDialogPrivate *dialog_priv;
  GtkFileChooserWidget *chooser_widget;
  GtkFileChooserWidgetPrivate *widget_priv;
  GtkFileChooserDefault *impl;
  gboolean passed;

  if (gtk_file_chooser_get_action (GTK_FILE_CHOOSER (dialog)) != expected_action)
    return FALSE;

  dialog_priv = dialog->priv;
  chooser_widget = GTK_FILE_CHOOSER_WIDGET (dialog_priv->widget);
  if (!chooser_widget)
    g_error ("BUG: dialog_priv->widget is not a GtkFileChooserWidget");

  widget_priv = chooser_widget->priv;
  impl = (GtkFileChooserDefault *) (widget_priv->impl);
  if (!impl)
    g_error ("BUG: widget_priv->impl is not a GtkFileChooserDefault");

  g_assert (impl->action == expected_action);

  passed = TRUE;

  /* OPEN implies that the "new folder" button is hidden; otherwise it is shown */
  if (impl->action == GTK_FILE_CHOOSER_ACTION_OPEN)
    passed = passed && !GTK_WIDGET_VISIBLE (impl->browse_new_folder_button);
  else
    passed = passed && GTK_WIDGET_VISIBLE (impl->browse_new_folder_button);

  /* Check that the widgets are present/visible or not */
  if (has_action (open_actions, G_N_ELEMENTS (open_actions), impl->action))
    {
      passed = passed && (impl->save_widgets == NULL
			  && impl->save_file_name_entry == NULL
			  && impl->save_folder_label == NULL
			  && impl->save_folder_combo == NULL
			  && impl->save_expander == NULL
			  && GTK_IS_CONTAINER (impl->browse_widgets) && GTK_WIDGET_DRAWABLE (impl->browse_widgets));
    }
  else if (has_action (save_actions, G_N_ELEMENTS (save_actions), impl->action))
    {
      /* FIXME: we can't use GTK_IS_FILE_CHOOSER_ENTRY() because it uses
       * _gtk_file_chooser_entry_get_type(), which is a non-exported symbol.
       * So, we just test impl->save_file_name_entry for being non-NULL
       */
      passed = passed && (GTK_IS_CONTAINER (impl->save_widgets) && GTK_WIDGET_DRAWABLE (impl->save_widgets)
			  && impl->save_file_name_entry != NULL && GTK_WIDGET_DRAWABLE (impl->save_file_name_entry)
			  && GTK_IS_LABEL (impl->save_folder_label) && GTK_WIDGET_DRAWABLE (impl->save_folder_label)
			  && GTK_IS_COMBO_BOX (impl->save_folder_combo) && GTK_WIDGET_DRAWABLE (impl->save_folder_combo)
			  && GTK_IS_EXPANDER (impl->save_expander) && GTK_WIDGET_DRAWABLE (impl->save_expander)
			  && GTK_IS_CONTAINER (impl->browse_widgets));

      /* FIXME: we are in a SAVE mode; test the visibility and sensitivity of
       * the children that change depending on the state of the expander.
       */
    }
  else
    {
      g_error ("BAD TEST: test_widgets_for_current_action() doesn't know about %s", get_action_name (impl->action));
      passed = FALSE;
    }

  return passed;
}

typedef gboolean (* ForeachActionCallback) (GtkFileChooserDialog *dialog,
					    GtkFileChooserAction  action,
					    gpointer              user_data);

static gboolean
foreach_action (GtkFileChooserDialog *dialog,
		ForeachActionCallback callback,
		gpointer              user_data)
{
  GEnumClass *enum_class;
  int i;

  enum_class = g_type_class_peek (GTK_TYPE_FILE_CHOOSER_ACTION);
  if (!enum_class)
    g_error ("BUG: get_action_name(): no GEnumClass for GTK_TYPE_FILE_CHOOSER_ACTION");

  for (i = 0; i < enum_class->n_values; i++)
    {
      GEnumValue *enum_value;
      GtkFileChooserAction action;
      gboolean passed;

      enum_value = enum_class->values + i;
      action = enum_value->value;

      passed = (* callback) (dialog, action, user_data);
      if (!passed)
	return FALSE;
    }

  return TRUE;
}

struct action_closure {
  GtkFileChooserAction from_action;
};

static gboolean
switch_from_to_action_cb (GtkFileChooserDialog *dialog,
			  GtkFileChooserAction  action,
			  gpointer              user_data)
{
  struct action_closure *closure;
  gboolean passed;

  closure = user_data;

  gtk_file_chooser_set_action (GTK_FILE_CHOOSER (dialog), closure->from_action);

  passed = test_widgets_for_current_action (dialog, closure->from_action);
  log_test (passed, "switch_from_to_action_cb(): reset to action %s", get_action_name (closure->from_action));
  if (!passed)
    return FALSE;

  gtk_file_chooser_set_action (GTK_FILE_CHOOSER (dialog), action);

  passed = test_widgets_for_current_action (dialog, action);
  log_test (passed, "switch_from_to_action_cb(): transition from %s to %s",
	    get_action_name (closure->from_action),
	    get_action_name (action));
  return passed;
}

static gboolean
switch_from_action_cb (GtkFileChooserDialog *dialog,
		       GtkFileChooserAction  action,
		       gpointer              user_data)
{
  struct action_closure closure;

  closure.from_action = action;

  return foreach_action (dialog, switch_from_to_action_cb, &closure);
}

static gboolean
test_action_widgets (GtkFileChooserDialog *dialog)
{
  GtkFileChooserAction action;
  gboolean passed;

  action = gtk_file_chooser_get_action (GTK_FILE_CHOOSER (dialog));

  passed = test_widgets_for_current_action (dialog, action);
  log_test (passed, "test_action_widgets(): widgets for initial action %s", get_action_name (action));
  if (!passed)
    return FALSE;

  passed = foreach_action (dialog, switch_from_action_cb, NULL);
  log_test (passed, "test_action_widgets(): all transitions through property change");

  return passed;
}


int
main (int argc, char **argv)
{
  GtkWidget *dialog;

  gtk_init (&argc, &argv);

  dialog = gtk_file_chooser_dialog_new ("Test file chooser",
					NULL,
					GTK_FILE_CHOOSER_ACTION_OPEN,
					GTK_STOCK_CANCEL,
					GTK_RESPONSE_CANCEL,
					GTK_STOCK_OK,
					GTK_RESPONSE_ACCEPT,
					NULL);
  gtk_widget_show (dialog);

  test_action_widgets (GTK_FILE_CHOOSER_DIALOG (dialog));

  gtk_widget_destroy (dialog);

  return 0;
}