;;;
;;; Atlantis is a framework for creating multi-user dungeon worlds.
;;; This is the Common Lisp implementation.
;;;
;;; Licensed under the terms of the MIT license.
;;; author: Daniel Vedder
;;; date: 09/05/2015
;;;

(defconstant ATLANTIS-VERSION '(0 2 1))

(load "util.lisp")
(load "game-objects.lisp")
(load "player.lisp")
(load "world.lisp")
(load "interpreter.lisp")
(load "ui.lisp")
(load "creator.lisp")

(defvar *debugging* NIL)

;; Game worlds must be registered in this list with a display name
;; and a path relative to ../ATL
(defvar *games* '(("Lugwey" "Lugwey/lugwey.atl")
					 ("Winnie the Pooh" "Pooh/pooh.atl")
					 ("Development" "dev/test.atl")))

(defun development ()
	"A method to easily test whatever feature I am currently developing"
	(setf *debugging* T)
	(load-file "../ATL/test/lisp-test.atl")
	(let ((player (make-player :name "Bilbo"
					  :place "Fields of Punishment"
					  :strength 6 :constitution 12
					  :dexterity 19 :intelligence 14
					  :money 100
					  :item '("Anaklusmos" "Lightning bolt")
					  :weapon "Lightning bolt")))
		(add-player player)
		(play-game (player-name player))))

(defun print-version ()
	(format t "~&Atlantis ~A.~A.~A"
		(first ATLANTIS-VERSION)
		(second ATLANTIS-VERSION)
		(third ATLANTIS-VERSION))
	(format t "~&Copyright (c) 2015 Daniel Vedder")
	(format t "~&Licensed under the terms of the MIT license.~%"))

(defun start-menu ()
	"Show the start menu and take a choice from the user"
	(clear-screen)
	(print-text-file "banner.txt")
	(format t "~&~%Welcome! What do you want to do?")
	(setf options '("Start a new game" "Load a game"
					   "Create worlds" "Develop" "About" "Exit"))
	(case (choose-number-option options)
		(0 (format t "~&Which world do you want to play?")
			;; let the player choose one of the game worlds
			(let ((world (choose-option
							 (append (keys *games*) '("Other" "Back")))))
				(cond ((equalp world "Back") (start-menu))
					((equalp world "Other")
						(format t "~&What world file do you want to load?")
						(input-string world-file))
					(T (setf world-file (cassoc world *games*))))
				(setf world-file (concatenate 'string "../ATL/" world-file))
				(load-file world-file)
				;; let the player choose a character
				(format t "~&Which character do you want to play?")
				(let* ((char-nr (choose-number-option
									(list-world-objects 'player)))
						  (char-name (nth char-nr (list-world-objects 'player))))
					(set-main-player char-name)
					(play-game))))
		;;FIXME Present the player with a choice of saved games
		(1 ;(choose-number-option *games*) ;;XXXXXX
			(format t "~&What game file do you want to load?")
			(input-string game)
			(setf game (concatenate 'string "../saves/" game))
			(load-game game)
			(play-game))
		(2 (world-creator))
		(3 (development)) ;; XXX Remove this
		(4 (print-version)
			(when (y-or-n-p "Show the license text?")
				(print-text-file "../LICENSE"))
			(start-menu))
		(5 (format t "~&Goodbye!")
			(quit))))
 
(defun cmd-parameter (name &optional truth-value)
	"Return the value of the parameter 'name'. Or T for present if truth-value."
	(let ((argument (member name *args* :test #'equalp)))
		(if argument
			(if truth-value T (second argument))
			NIL)))

(defun print-help ()
	(print-version)
	(setf help-text "
Commandline options:
-v --version          Show the version number and exit
-h --help             Show this help text and exit
--license             Show the license text
--debugging           Switch on debug mode")
	(format t "~A" help-text))

(defun parse-commandline-args ()
	(cond ((or (cmd-parameter "--version" T) (cmd-parameter "-v" T))
			  (print-version) (quit))
		((or (cmd-parameter "--help" T) (cmd-parameter "-h" T))
			(print-help) (quit))
		((cmd-parameter "--license" T)
			(dolist (line (load-text-file "../LICENSE"))
				(unless (null line) (format t "~%~A" line)))
			(quit))
		((cmd-parameter "--debugging")
			(setf *debugging* T)))
	(start-menu))


;; Initialize the random state (which would otherwise not be very random...)
(setf *random-state* (make-random-state t))

;; Only show the interactive menu if no commandline parameters are given
(if *args*
	(parse-commandline-args)
	(start-menu))