#include <gtk/gtk.h>
#include <stdio.h>

typedef struct{
	GtkApplication *app;
	GtkWidget *window , *box ,*input, *image;
	char dir[256];
} Appdata;

static void load_image(Appdata *data){
	GError *error = NULL;
	if (data->image != NULL){
		gtk_box_remove(data->box,GTK_WIDGET(data->image));
	}
	GdkPixbuf *pix = gdk_pixbuf_new_from_file (("%s", data->dir), &error);
	if (pix == NULL){
	    g_printerr("Error loading file: #%d %s\n", error->code, error->message);
	    g_error_free(error);
	    exit (1);
	}
	data->image = gtk_image_new_from_pixbuf(pix);
	gtk_box_append(GTK_BOX(data->box),data->image);
}

// activates after enter dir in input
void on_entry_activate(GtkEntry *entry, Appdata *data){
	const gchar *user_text;
    user_text = gtk_editable_get_text(GTK_EDITABLE(entry));
    g_print("input: %s\n", user_text);
    // check empty input
	if (strcmp(user_text, "") == 0 || strcmp(user_text, " ") == 0){
		snprintf(data->dir, sizeof(data->dir), "/");
		gtk_editable_set_text(GTK_EDITABLE(data->input), "/");
	}
	else{
		snprintf(data->dir, sizeof(data->dir), "%s", user_text);
		gtk_editable_set_text(GTK_EDITABLE(data->input), ("%s", data->dir));
	}
	load_image(data);
}

// make input line
static void input_dir(Appdata *data){
	data->input = gtk_entry_new();
	gtk_editable_set_text(GTK_EDITABLE(data->input), ("%s", data->dir));
	g_signal_connect(data->input, "activate", G_CALLBACK(on_entry_activate), data);
	g_print("Set input line\n");
	gtk_box_append (GTK_BOX (data->box), data->input);
}

static void app_activate (GtkApplication *app, gpointer *user_data){
	Appdata *data = (Appdata *)user_data;
    data->window = gtk_application_window_new (GTK_APPLICATION(app));
	gtk_window_set_title (GTK_WINDOW (data->window), "Shakalizator");
	gtk_window_set_default_size (GTK_WINDOW (data->window), 600, 400);
	gtk_window_set_application(GTK_WINDOW(data->window),app);
	gtk_window_present(GTK_WINDOW(data->window));
	data->box = gtk_box_new(GTK_ORIENTATION_VERTICAL,10);
	gtk_widget_set_valign(data->box,GTK_ALIGN_START);
	gtk_window_set_child(GTK_WINDOW(data->window), data->box);
	input_dir(data);
	printf("Present window %d\n", data->window);
	g_print("Started\n");
}

int main (int argc, char **argv){
	Appdata *data = g_new0(Appdata,1);
	data->app = gtk_application_new("fun.kotyara.shakalizator", G_APPLICATION_DEFAULT_FLAGS);
	g_signal_connect (data->app, "activate",G_CALLBACK(app_activate),data);
	int status = g_application_run (G_APPLICATION (data->app), argc, argv);
    g_object_unref(data->app);
    g_free(data);
    return status;
}