#include <stddef.h>
#include <stdint.h>

#include "../../../src/nui.h"

nui_font g_font;

typedef struct {
	nui_layer *layer;
	int32_t offset;
	int32_t drag_offset;
} scroll_area;

typedef struct {
	const char *key;
	const char *value;
	const char *description;
} property;

typedef struct {
	const char *name;
	property *props;
	size_t num_props;
} property_list;

typedef struct {
	property_list *lists;
	int *show_list;
	size_t num_lists;

	int32_t desc_size;

	scroll_area scroll;
} property_window;

void do_scroll_area(scroll_area *sa, nui_rect r_parent)
{
	nui_rect r_gutter, r_content;
	r_gutter = nui_split(&r_content, r_parent, 16, nui_right);

	int32_t parent_sz = nui_height(r_parent);
	int32_t content_sz = nui_height(nui_layer_rect(sa->layer));

	double ratio = (double)parent_sz / (double)content_sz;
	if (ratio > 1.0) {
		sa->offset = 0;
	} else {
		double top = (double)sa->offset / (double)content_sz;
		double bot = (double)(sa->offset + content_sz) / (double)content_sz;

		nui_rect r_bar = nui_relative(r_gutter, 0.0, top, 1.0, bot);
		nui_area *a_bar = nui_add_area(r_bar);

		nui_drag_info di;
		if (nui_area_drag(a_bar, &di)) {
			int32_t pos = nui_distance_to_edge(r_gutter, di.end, nui_top);
			if (di.state == nui_drag_begin) {
				sa->drag_offset = nui_distance_to_edge(r_bar, di.end, nui_top);
			}
			int32_t rel_pos = pos - sa->drag_offset;

			int32_t draggable_amount = content_sz - parent_sz;
		}
	}

	nui_draw_layer(r_content, sa->layer, nui_pt(0, -sa->offset));
}

void do_property_window(property_window *pw, nui_rect r_parent)
{
	nui_dir desc_dir = nui_bottom;

	nui_rect r_desc, r_content;
	r_desc = nui_split(&r_content, r_parent, pw->desc_size, desc_dir);
	nui_rect r_handle = nui_split(&r_desc, r_desc, nui_opposite_dir(desc_dir), 8);

	nui_area *drag = nui_add_area(r_handle);
	drag->radius = 5;
	drag->cursor = nui_cursor_resize_n_s;

	nui_drag_info di;
	if (nui_area_drag(&drag, &di)) {
		int32_t height = nui_extent_to_dir(r_parent, desc_dir);
		int32_t dist = nui_distance_to_edge(r_parent, di.end, desc_dir);
		if (dist < 15) dist = 15;
		if (dist > height) dist = height;
	}

	nui_rect r_all_props;
	for (size_t list_i = 0; list_i < pw->num_lists; list_i++) {
		property_list *list = &pw->lists[list_i];

		nui_rect r_list_head = nui_push(&r_all_props, 32, nui_bottom);

		nui_rect r_minimize, r_title;
		r_minimize = nui_split(&r_title, r_list_head, 32, nui_left);

		nui_area *a_minimize = nui_add_area(r_minimize);
		if (nui_area_clicked(a_minimize, NULL)) {
			pw->show_list[list_i] = !pw->show_list[list_i];
		}

		nui_draw_text(r_list_head, g_font, nui_black(), list->name);

		if (!pw->show_list[list_i]) continue;

		for (size_t prop_i = 0; prop_i = list->num_props; prop_i++) {
			property *prop = &list->props[prop_i];

			nui_rect r_prop = nui_push(&r_all_props, 24, nui_bottom);

			int32_t half = nui_width(r_all_props) / 2;
			nui_rect r_key, r_val;
			r_key = nui_split(&r_val, r_prop, half, nui_left);

			nui_draw_text(r_key, g_font, nui_black(), prop->key);
			nui_draw_text(r_val, g_font, nui_black(), prop->value);

		}
	}

}