;;;;
;;;; Terra Nostra is a Minecraft-like survival game for the commandline.
;;;;
;;;; This file defines in-game items.
;;;; 
;;;; (c) 2018 Daniel Vedder, MIT license
;;;;

(let ((item-list NIL))
	(defun register-item (symbol-name item-object)
		(setf item-list
			(cons (list symbol-name item-object) item-list)))

	(defun get-item-type (symbol-name)
		(cassoc symbol-name item-list))

	(defun get-item (symbol-name)
		(copy-item (get-item-type symbol-name))))

(defmacro new-item (type name &body body)
	`(register-item ,name
		 (make-instance ,type ,@body)))


;;; RESOURCE ITEMS

;;TODO sand, glass, clay, bricks

(new-item 'resource 'wood
	:name "wood" :weight 1
	:description "A block of wood, just right for working with"
	:burning-product 'charcoal)

(new-item 'resource 'charcoal
	:name "charcoal" :weight 1
	:description "A black lump of charcoal. Burns better than wood.")

(new-item 'resource 'stone
	:name "stone" :weight 2
	:description "A fist-sized stone. What are you going to do with it?")

(new-item 'resource 'iron-ore
	:name "iron ore" :weight 4
	:description "A lump of iron ore - still needs to be smelted."
	:burning-product 'iron)

(new-item 'resource 'iron
	:name "iron" :weight 3
	:description "An iron ingot, ready for further crafting.")

;;; LANDSCAPE FEATURES

(new-item 'feature 'acacia
	:name "acacia"
	:description "A tall acacia tree, spreading its branches wide."
	:destroy-with '(wood)
	:drops '(wood) :weight 2000)

(new-item 'feature 'miombo
	:name "miombo"
	:description "A small, crooked miombo tree."
	:destroy-with '(wood)
	:drops '(wood) :weight 500)

(new-item 'feature 'boulder
	:name "boulder"
	:description "A huge lump of grey basalt, sticking out of the ground."
	:destroy-with '(stone)
	:drops '(stone) :weight 5000)

;;; TOOL ITEMS

;;TODO bronze tools, weapons

(new-item 'tool 'stone-axe
	:name "stone axe"
	:description "An axe, crudely but effectively fashioned out of stone."
	:type 'wood :level 1
	:weight 2 :craft-with '(stone wood))

(new-item 'tool 'iron-axe
	:name "iron axe"
	:description "A finely honed iron axe, just right for chopping wood."
	:type 'wood :level 3
	:weight 3 :craft-with '(iron wood))

(new-item 'tool 'stone-pickaxe
	:name "stone pickaxe"
	:description "A pickaxe, somewhat helplessly made from stone."
	:type 'stone :level 1
	:weight 3 :craft-with '(stone stone wood))

(new-item 'tool 'iron-pickaxe
	:name "iron pickaxe"
	:description "A solid iron pickaxe. Prepare to split rock!"
	:type 'stone :level 3
	:weight 4 :craft-with '(iron iron wood))