#include "engine.h"
#include "objids.h"
#include "inventory.h"
#include <assert.h>

extern const char _binary_sprite_menubar_raw_start[];
extern const char _binary_sprite_item_popcorn_raw_start[];
extern const char _binary_sprite_item_pager_raw_start[];

static const char *const inventory_sprites[] = {
	_binary_sprite_item_popcorn_raw_start,
	_binary_sprite_item_pager_raw_start,
};

int inventory[INVENTORY_SIZE] = {
	// no default items
};

static void create_inventory_object(scene *s, int index) {
	int type = inventory[index];
	if(type == INVITEM_BLANK) return;

	int x = 1066 + 14 + (index & 1) * 100;
	int y = 200 + (index >> 1) * 100;
	struct object *obj = scene_add_object(s, OBJID_INVENTORY_SLOTS + index, x, y, 87, 87, inventory_sprites[type-1]);
}

void create_standard_inventory(struct scene *s) {
	scene_add_object(s, OBJID_MENUBAR, 1066, 0, 234, 800, _binary_sprite_menubar_raw_start);
	for(int i = 0; i < INVENTORY_SIZE; i++) {
		create_inventory_object(s, i);
	}
}

void standard_inventory_onclick(struct object *obj) {
	int slot = obj->id - OBJID_INVENTORY_SLOTS;
	assert(inventory[slot] != INVITEM_BLANK);

	// does nothing for now
}

int count_item_in_inventory(int item) {
	int count = 0;
	for(int i = 0; i < INVENTORY_SIZE; i++)
		if(inventory[i] == item)
			count++;
	return count;
}
int add_to_inventory(int item) {
	// returns slot number or -1 if no space available
	for(int i = 0; i < INVENTORY_SIZE; i++) {
		if(!inventory[i]) {
			inventory[i] = item;
			// TODO: inventory should refresh when a scene is activated when a different scene is activated before.
			// If not a fully custom rendering. Otherwise, popping a scene may revert inventory objects on screen to an earlier state.
			create_inventory_object(&top_scene, i);
			return i;
		}
	}
	return -1;
}