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;;; player.lisp - 2025-02-15
;; Copyright (C) 2025 Aryadev Chavali
;; This program is distributed in the hope that it will be useful, but WITHOUT
;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
;; FOR A PARTICULAR PURPOSE. See the GNU General Public License Version 2 for
;; details.
;; You may distribute and modify this code under the terms of the GNU General
;; Public License Version 2, which you should have received a copy of along with
;; this program. If not, please go to <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Player management - in particular, financing and hand management.
;;; Code:
(in-package :cantedraw.player)
(defun playerp (x)
(and (typep (car x) 'fixnum)
(typep (cadr x) 'fixnum)
(typep (caddr x) 'cardset)))
(deftype player () `(and cons (satisfies playerp)))
(deftype players () 'list)
(define-condition error-player-nonexistent (error)
((id :initarg :id :reader id))
(:report
(lambda (err stream)
(format stream "Player [~a] is non-existent or malformed"
(id err)))))
(define-condition error-player-broke (error)
((id :initarg :id :reader id)
(balance :initarg :balance :reader balance)
(required :initarg :required :reader required))
(:report
(lambda (err stream)
(format stream "Player [~a] has balance $~a but $~a requested."
(id err)
(balance err)
(required err)))))
(fn player-id (player) (-> (player) fixnum)
(car player))
(fn player-balance (player) (-> (player) fixnum)
(cadr player))
(fn player-hand (player) (-> (player) cardset)
(caddr player))
(fn player-exists? (id players) (-> (fixnum players) boolean)
(assoc id players))
(fn player-bankrupt? (player) (-> (player) boolean)
(<= (cadr player) 0))
(fn player-can-bet? (min-bet player) (-> (fixnum player) boolean)
(>= (cadr player) min-bet))
(fn player-pay (id amount players) (-> (fixnum fixnum players) players)
(let ((p (assoc id players)))
(cond
((not (typep p 'player))
(error 'error-player-nonexistent
:id id))
((not (player-can-bet? amount p))
(error 'error-player-broke
:id id
:balance (player-balance p)
:required amount))
(t
(destructuring-bind (id balance cards) p
(setf (cdr (assoc id players))
(list (- balance amount) cards)))))
players))
(fn player-receive (id amount players)
(-> (fixnum fixnum players) players)
(let ((p (assoc id players)))
(if (not (typep p 'player))
(error 'error-player-nonexistent
:id id))
(destructuring-bind (id balance cards) p
(setf (cdr (assoc id players))
(list (+ balance amount) cards)))
players))
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