#include <stdio.h>
#include <gtk-4.0/gtk/gtk.h>

#include "warm.h"
#include "cold.h"
#include "display.h"
#include "contain.h"
#include "texts.h"

//  https://docs.gtk.org/gtk4/visual_index.html  <  widgets gallery
//  https://docs.gtk.org/gtk4/section-text-widget.html
//  https://docs.gtk.org/gtk4/class.Widget.html#height-for-width-geometry-management
//  GTK_ORIENTATION_VERTICAL       GTK_ORIENTATION_HORIZONTAL


static struct TreeNode_t {gchar *text; struct TreeNode_t *child, *next;};

static GListModel* ui_experimental_tree_get_children_model (struct TreeNode_t *parent){
    GtkStringList *list = NULL;
    if (parent) {
        printf("[ui_experimental_tree_get_children_model] here is %s content : ", parent->text);
        struct TreeNode_t *child = parent->child;
        if (child) {list = gtk_string_list_new(NULL);}
        while(child) {
             gtk_string_list_append(list, child->text);
             printf("%s ", child->text);
             child = child->next;
        }
    }
    printf("\n");
    return G_LIST_MODEL(list);
}

static GListModel* ui_experimental_tree_create_model_func (GObject *item, gpointer root){
    struct TreeNode_t *cur = (struct TreeNode_t *)root;
    struct TreeNode_t *parent = root;
    const gchar *string =  gtk_string_object_get_string (GTK_STRING_OBJECT(item));
    while (cur) {
        if (strcmp(string, cur->text) == 0) break;
        cur = cur->next;
        if (cur == NULL) {cur = parent->child; parent = cur;}
    }
    printf("[ui_experimental_tree_create_model_func] looked for %s in %s item\n", cur->text, string);
    return ui_experimental_tree_get_children_model(cur);
}

static void on_experimental_tree_bind_factory (GtkSignalListItemFactory *factory, GObject* object, gpointer user_data){
    GtkListItem *list_item = GTK_LIST_ITEM (object);
    GtkTreeListRow *row = gtk_list_item_get_item (list_item);
    if (row != NULL) {
        const gchar *text = gtk_string_object_get_string (GTK_STRING_OBJECT (gtk_tree_list_row_get_item (row)));
        GtkWidget *expander = gtk_list_item_get_child (list_item);
        gtk_expander_set_label (GTK_EXPANDER (expander), text);
        // g_signal_handlers_disconnect_by_func(expander, G_CALLBACK(on_tree_expander_toggled), row);
        // g_signal_connect(expander, "activate", G_CALLBACK(on_tree_expander_toggled), row);
        gtk_widget_set_margin_start(expander, gtk_tree_list_row_get_depth(row)*20);
        gboolean is_expanded = gtk_tree_list_row_get_expanded(row);
        printf("[on_experimental_tree_bind_factory] row != NULL  here is %s content and expander is %d\n", text, is_expanded);
    } else printf("[on_experimental_tree_bind_factory] row == NULL\n");
}

static void on_experimental_expander_toggled(GtkExpander *expander, gpointer user_data){
  gtk_expander_set_expanded (expander, gtk_expander_get_expanded (expander));
  printf(">  %s\n", gtk_expander_get_label (user_data));
}

void on_experimental_tree_setup_factory (GtkSignalListItemFactory *factory,
                            GObject* object,
                            gpointer user_data)
{
    GtkWidget* expander = gtk_expander_new (NULL);
    gtk_list_item_set_child (GTK_LIST_ITEM(object), expander);
    printf("[on_experimental_tree_setup_factory] here is an expander\n");
}

static struct TreeNode_t *create_tree_node (const gchar* text){
    struct TreeNode_t *node = g_malloc0 (sizeof(struct TreeNode_t));
    node->text = g_strdup(text);
    node->child = NULL;
    return node;
}

static void add_child_node (struct TreeNode_t *parent, struct TreeNode_t *child){
    if (parent->child) {
        struct TreeNode_t *cur = parent->child;
        while (cur && cur->next) {
            cur = cur->next;
        }
        cur->next = child;
    } else parent->child = child;
}

void create_experimental_tree (GtkBox *experimental_box){
    GtkSignalListItemFactory *factory = GTK_SIGNAL_LIST_ITEM_FACTORY (gtk_signal_list_item_factory_new ());
    g_signal_connect (factory, "setup", G_CALLBACK(on_experimental_tree_setup_factory), NULL);
    g_signal_connect (factory, "bind", G_CALLBACK(on_experimental_tree_bind_factory), NULL);

  GtkExpander *hello = GTK_EXPANDER (gtk_expander_new ("hello !"));
  gtk_expander_set_expanded (GTK_EXPANDER (hello), TRUE);
  gtk_widget_set_margin_start (GTK_WIDGET (hello), 0);
  g_signal_connect (hello, "activate", G_CALLBACK (on_experimental_expander_toggled), hello);
  gtk_box_append (experimental_box, GTK_WIDGET (hello));

  GtkExpander *it_s_me = GTK_EXPANDER (gtk_expander_new ("it's me !"));
  gtk_expander_set_expanded (GTK_EXPANDER (it_s_me), FALSE);
  gtk_widget_set_margin_start(GTK_WIDGET (it_s_me), 20);
  g_signal_connect (it_s_me, "activate", G_CALLBACK (on_experimental_expander_toggled), it_s_me);
  gtk_box_append (experimental_box, GTK_WIDGET (it_s_me));
}