Skyrat-tg/code/modules/cards/cardhand.dm

/obj/item/toy/cards/cardhand
	name = "hand of cards"
	desc = "A number of cards not in a deck, customarily held in ones hand."
	icon = 'icons/obj/toys/playing_cards.dmi'
	icon_state = "nothing"
	w_class = WEIGHT_CLASS_TINY
	worn_icon_state = "card"

/obj/item/toy/cards/cardhand/Initialize(mapload)
	. = ..()

	register_context()
	update_appearance()

/obj/item/toy/cards/cardhand/suicide_act(mob/living/carbon/user)
	user.visible_message(span_suicide("[user] is slitting [user.p_their()] wrists with \the [src]! It looks like [user.p_they()] [user.p_have()] a crummy hand!"))
	playsound(src, 'sound/items/cardshuffle.ogg', 50, TRUE)
	return BRUTELOSS

/obj/item/toy/cards/cardhand/examine(mob/user)
	. = ..()
	for(var/obj/item/toy/singlecard/card in fetch_card_atoms())
		if(HAS_TRAIT(user, TRAIT_XRAY_VISION))
			. += span_notice("You scan the cardhand with your x-ray vision and there is a: [card.cardname]")
		var/marked_color = card.getMarkedColor(user)
		if(marked_color)
			. += span_notice("There is a [marked_color] mark on the corner of a card in the cardhand!")

/obj/item/toy/cards/cardhand/add_context(atom/source, list/context, obj/item/held_item, mob/living/user)
	if(istype(held_item, /obj/item/toy/cards/deck))
		var/obj/item/toy/cards/deck/dealer_deck = held_item
		if(HAS_TRAIT(dealer_deck, TRAIT_WIELDED))
			context[SCREENTIP_CONTEXT_LMB] = "Deal card"
			context[SCREENTIP_CONTEXT_RMB] = "Deal card faceup"
			return CONTEXTUAL_SCREENTIP_SET
		context[SCREENTIP_CONTEXT_LMB] = "Recycle cards"
		return CONTEXTUAL_SCREENTIP_SET

	if(istype(held_item, /obj/item/toy/singlecard))
		context[SCREENTIP_CONTEXT_LMB] = "Combine cards"
		context[SCREENTIP_CONTEXT_RMB] = "Combine cards faceup"
		return CONTEXTUAL_SCREENTIP_SET

	return NONE

/obj/item/toy/cards/cardhand/attack_self(mob/living/user)
	if(!isliving(user) || !user.can_perform_action(src, NEED_DEXTERITY| FORBID_TELEKINESIS_REACH))
		return

	var/list/handradial = list()
	for(var/obj/item/toy/singlecard/card in fetch_card_atoms())
		handradial[card] = image(icon = src.icon, icon_state = card.icon_state)

	var/obj/item/toy/singlecard/choice = show_radial_menu(usr, src, handradial, custom_check = CALLBACK(src, PROC_REF(check_menu), user), radius = 36, require_near = TRUE)
	if(!choice)
		return FALSE

	var/obj/item/toy/singlecard/selected_card = draw(user, choice)
	selected_card.pickup(user)
	user.put_in_hands(selected_card)

	if(count_cards() == 1)
		user.temporarilyRemoveItemFromInventory(src, TRUE)
		var/obj/item/toy/singlecard/last_card = draw(user)
		last_card.pickup(user)
		user.put_in_hands(last_card)
		qdel(src) // cardhand is empty now so delete it

/obj/item/toy/cards/cardhand/proc/check_menu(mob/living/user)
	return isliving(user) && !user.incapacitated

/obj/item/toy/cards/cardhand/attackby(obj/item/weapon, mob/living/user, params, flip_card = FALSE)
	var/obj/item/toy/singlecard/card

	if(istype(weapon, /obj/item/toy/singlecard))
		card = weapon

	if(istype(weapon, /obj/item/toy/cards/deck))
		var/obj/item/toy/cards/deck/dealer_deck = weapon
		if(!HAS_TRAIT(dealer_deck, TRAIT_WIELDED)) // recycle cardhand into deck (if unwielded)
			dealer_deck.insert(src)
			user.balloon_alert_to_viewers("puts card in deck")
			return
		card = dealer_deck.draw(user)

	if(card)
		if(flip_card)
			card.Flip()
		insert(card)
		return

	return ..()

/obj/item/toy/cards/cardhand/attackby_secondary(obj/item/weapon, mob/user, params)
	attackby(weapon, user, params, flip_card = TRUE)
	return SECONDARY_ATTACK_CONTINUE_CHAIN

#define CARDS_MAX_DISPLAY_LIMIT 5 // the amount of cards that are displayed in a hand
#define CARDS_PIXEL_X_OFFSET -5 // start out displaying the 1st card -5 pixels left
#define CARDS_ANGLE_OFFSET -45 // start out displaying the 1st card -45 degrees counter clockwise

/obj/item/toy/cards/cardhand/update_overlays()
	. = ..()

	// This isn't strictly necessary, but this isn't expensive enough in reality
	var/list/cards = fetch_card_atoms()

	cut_overlays()
	if(cards.len <= 1)
		icon_state = null // we want an error icon to appear if this doesn't get qdel
		return

	var/starting_card_pos = max(0, cards.len - CARDS_MAX_DISPLAY_LIMIT) + 1 // only display the top cards in the cardhand, +1 because list indexes start at 1
	var/cards_to_display = min(CARDS_MAX_DISPLAY_LIMIT, cards.len)
	// 90 degrees from the 1st card to the last, so split the divider by total cards displayed
	var/angle_divider = round(90/(cards_to_display - 1))
	// 10 pixels from the 1st card to the last, so split the divider by total cards displayed
	var/pixel_divider = round(10/(cards_to_display - 1))

	// starting from the 1st card to last, we want to slowly increase the angle and pixel_x offset
	// to spread the cards out using our dividers
	for(var/i in 0 to cards_to_display - 1)
		var/obj/item/toy/singlecard/card = cards[starting_card_pos + i]
		var/image/card_overlay = image(icon, icon_state = card.icon_state, pixel_x = CARDS_PIXEL_X_OFFSET + (i * pixel_divider))
		var/rotation_angle = CARDS_ANGLE_OFFSET + (i * angle_divider)
		var/matrix/M = matrix()
		M.Turn(rotation_angle)
		card_overlay.transform = M
		add_overlay(card_overlay)

#undef CARDS_MAX_DISPLAY_LIMIT
#undef CARDS_PIXEL_X_OFFSET
#undef CARDS_ANGLE_OFFSET