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(defpackage game
(:use :cl)
(:export :new-game
:buy-item
:sell-item
:change-zone
:get-profit
:get-profit-in-zone))
(in-package :game)
(defclass game ()
((player :initarg :player
:accessor player)
(zones :initarg :zones
:accessor zones)
(cur-zone :initarg :start-zone
:accessor cur-zone)))
(defun new-game (player start-zone zones)
(make-instance 'game
:player player
:zones zones
:start-zone start-zone))
(defmethod buy-item ((g game) name amount)
(with-slots (player cur-zone) g
(let ((item (zone:get-commodity cur-zone name)))
(when item
(player:buy-item player item amount)))))
(defmethod sell-item ((g game) name amount)
(with-slots (player cur-zone) g
(let ((item (zone:get-commodity cur-zone name)))
(when item
(player:sell-item player item amount)))))
(defmethod change-zone ((g game) name)
(with-slots (cur-zone zones) g
(let ((z (find-if (lambda (z) (string= name
(zone:name z)))
zones)))
(when z
(setq cur-zone z)))))
(defmethod get-profit-in-zone ((g game) name zone)
(with-slots (player) g
(let ((player-item (car (player:find-item player name)))
(zone-item (zone:get-commodity zone name)))
(if (and player-item zone-item)
(- (commodities:price zone-item)
(commodities:price player-item))
0))))
(defmethod get-profit ((g game) name)
(with-slots (cur-zone) g
(get-profit-in-zone g name cur-zone)))
(defmethod commodities-panel ((g game))
(with-slots (player cur-zone) g
(mapcar (lambda (c)
(let* ((name (commodities:name c))
(price (commodities:price c))
(player-item (player:find-item player name))
(quantity (if player-item (cdr player-item) 0))
(profit (if player-item
(- price
(commodities:price (car player-item))))))
(list name
price
quantity
profit)))
(zone:get-commodities cur-zone))))
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