;; -----------------------------------------------------


;; Testing list functions
(list)
;=>()
(list? (list))
;=>true
(empty? (list))
;=>true
(empty? (list 1))
;=>false
(list 1 2 3)
;=>(1 2 3)
(count (list 1 2 3))
;=>3
(count (list))
;=>0
(count nil)
;=>0
(if (> (count (list 1 2 3)) 3) "yes" "no")
;=>"no"
(if (>= (count (list 1 2 3)) 3) "yes" "no")
;=>"yes"


;; Testing if form
(if true 7 8)
;=>7
(if false 7 8)
;=>8
(if true (+ 1 7) (+ 1 8))
;=>8
(if false (+ 1 7) (+ 1 8))
;=>9
(if nil 7 8)
;=>8
(if 0 7 8)
;=>7
(if "" 7 8)
;=>7
(if (list) 7 8)
;=>7
(if (list 1 2 3) 7 8)
;=>7


;; Testing 1-way if form
(if false (+ 1 7))
;=>nil
(if nil 8 7)
;=>7
(if true (+ 1 7))
;=>8


;; Testing basic conditionals
(= 2 1)
;=>false
(= 1 1)
;=>true
(= 1 2)
;=>false
(= 1 (+ 1 1))
;=>false
(= 2 (+ 1 1))
;=>true
(= nil 1)
;=>false
(= nil nil)
;=>true

(> 2 1)
;=>true
(> 1 1)
;=>false
(> 1 2)
;=>false

(>= 2 1)
;=>true
(>= 1 1)
;=>true
(>= 1 2)
;=>false

(< 2 1)
;=>false
(< 1 1)
;=>false
(< 1 2)
;=>true

(<= 2 1)
;=>false
(<= 1 1)
;=>true
(<= 1 2)
;=>true


;; Testing equality
(= 1 1)
;=>true
(= 0 0)
;=>true
(= 1 0)
;=>false
(= "" "")
;=>true
(= "abc" "")
;=>false
(= "" "abc")
;=>false
(= "abc" "def")
;=>false

(= (list) (list))
;=>true
(= (list 1 2) (list 1 2))
;=>true
(= (list 1) (list))
;=>false
(= (list) (list 1))
;=>false
(= 0 (list))
;=>false
(= (list) 0)
;=>false
(= (list) "")
;=>false
(= "" (list))
;=>false


;; Testing builtin and user defined functions
(+ 1 2)
;=>3
( (fn* (a b) (+ b a)) 3 4)
;=>7
( (fn* () 4) )
;=>4

( (fn* (f x) (f x)) (fn* (a) (+ 1 a)) 7)
;=>8


;; Testing closures
( ( (fn* (a) (fn* (b) (+ a b))) 5) 7)
;=>12

(def! gen-plus5 (fn* () (fn* (b) (+ 5 b))))
(def! plus5 (gen-plus5))
(plus5 7)
;=>12

(def! gen-plusX (fn* (x) (fn* (b) (+ x b))))
(def! plus7 (gen-plusX 7))
(plus7 8)
;=>15


;; Testing variable length arguments

( (fn* (& more) (count more)) 1 2 3)
;=>3
( (fn* (& more) (count more)) 1)
;=>1
( (fn* (& more) (count more)) )
;=>0
( (fn* (a & more) (count more)) 1 2 3)
;=>2
( (fn* (a & more) (count more)) 1)
;=>0


;; Testing language defined not function
(not false)
;=>true
(not true)
;=>false
(not "a")
;=>false
(not 0)
;=>false


;; Testing do form
(do (prn "prn output1"))
; "prn output1"
;=>nil
(do (prn "prn output2") 7)
; "prn output2"
;=>7
(do (prn "prn output1") (prn "prn output2") (+ 1 2))
; "prn output1"
; "prn output2"
;=>3

(do (def! a 6) 7 (+ a 8))
;=>14
a
;=>6


;; Testing recursive sumdown function
(def! sumdown (fn* (N) (if (> N 0) (+ N (sumdown  (- N 1))) 0)))
(sumdown 1)
;=>1
(sumdown 2)
;=>3
(sumdown 6)
;=>21


;; Testing recursive fibonacci function
(def! fib (fn* (N) (if (= N 0) 1 (if (= N 1) 1 (+ (fib (- N 1)) (fib (- N 2)))))))
(fib 1)
;=>1
(fib 2)
;=>2
(fib 4)
;=>5
(fib 10)
;=>89

;; -----------------------------------------------------

;; Testing string quoting

""
;=>""

"abc"
;=>"abc"

"abc  def"
;=>"abc  def"

"\""
;=>"\""


;; Testing pr-str

(pr-str)
;=>""

(pr-str "")
;=>"\"\""

(pr-str "abc")
;=>"\"abc\""

(pr-str "abc  def" "ghi jkl")
;=>"\"abc  def\" \"ghi jkl\""

(pr-str "\"")
;=>"\"\\\"\""

(pr-str (list 1 2 "abc" "\"") "def")
;=>"(1 2 \"abc\" \"\\\"\") \"def\""


;; Testing str

(str)
;=>""

(str "")
;=>""

(str "abc")
;=>"abc"

(str "\"")
;=>"\""

(str 1 "abc" 3)
;=>"1abc3"

(str "abc  def" "ghi jkl")
;=>"abc  defghi jkl"

;;; TODO: get this working properly
;;;(str (list 1 2 "abc" "\"") "def")
;;;;=>"(1 2 \"abc\" \"\\\"\")def"


;; Testing prn
(prn)
; 
;=>nil

(prn "")
; ""
;=>nil

(prn "abc")
; "abc"
;=>nil

(prn "abc  def" "ghi jkl")
; "abc  def" "ghi jkl"

(prn "\"")
; "\""
;=>nil

(prn (list 1 2 "abc" "\"") "def")
; (1 2 "abc" "\"") "def"
;=>nil


;; Testing println
(println)
; 
;=>nil

(println "")
; 
;=>nil

(println "abc")
; abc
;=>nil

(println "abc  def" "ghi jkl")
; abc  def ghi jkl

(println "\"")
; "
;=>nil

(println (list 1 2 "abc" "\"") "def")
; (1 2 abc ") def
;=>nil

;;
;; -------- Optional Functionality --------

;; Testing keywords
(= :abc :abc)
;=>true
(= :abc :def)
;=>false
(= :abc ":abc")
;=>false

;; Testing vector truthiness
(if [] 7 8)
;=>7

;; Testing vector equality
(= [] (list))
;=>true
(= (list 1 2) [1 2])
;=>true
(= (list 1) [])
;=>false
(= [] [1])
;=>false
(= 0 [])
;=>false
(= [] 0)
;=>false
(= [] "")
;=>false
(= "" [])
;=>false

;; Testing vector parameter lists
( (fn* [] 4) )
;=>4
( (fn* [f x] (f x)) (fn* [a] (+ 1 a)) 7)
;=>8