# Copyright (c) 2017 Calvin Rose
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(import "test/helper.dst")
(start-suite 0)

(assert (= 10 (+ 1 2 3 4)) "addition")
(assert (= -8 (- 1 2 3 4)) "subtraction")
(assert (= 24 (* 1 2 3 4)) "multiplication")
(assert (= 4 (<< 1 2)) "left shift")
(assert (= 1 (>> 4 2)) "right shift")
(assert (< 1 2 3 4 5 6) "less than integers")
(assert (< 1.0 2.0 3.0 4.0 5.0 6.0) "less than reals")
(assert (> 6 5 4 3 2 1) "greater than integers")
(assert (> 6.0 5.0 4.0 3.0 2.0 1.0) "greater than reals")
(assert (<= 1 2 3 3 4 5 6) "less than or equal to integers")
(assert (<= 1.0 2.0 3.0 3.0 4.0 5.0 6.0) "less than or equal to reals")
(assert (>= 6 5 4 4 3 2 1) "greater than or equal to integers")
(assert (>= 6.0 5.0 4.0 4.0 3.0 2.0 1.0) "greater than or equal to reals")

(assert (order< nil false true
	(fiber.new (fn [x] x))
    1 1.0 "hi"
	(quote hello)
	(array 1 2 3)
	(tuple 1 2 3)
    (table "a" "b" "c" "d")
    (struct 1 2 3 4)
	(buffer "hi")
	(fn [x] (+ x x))
	+) "type ordering")

(assert (= (string (buffer "123" "456")) (string @"123456")) "buffer literal")
(assert (= (get {} 1) nil) "get nil from empty struct")
(assert (= (get @{} 1) nil) "get nil from empty table")
(assert (= (get {:boop :bap} :boop) :bap) "get non nil from struct")
(assert (= (get @{:boop :bap} :boop) :bap) "get non nil from table")
(assert (put @{} :boop :bap) "can add to empty table")
(assert (put @{1 3} :boop :bap) "can add to non-empty table")

(assert (not false) "false literal")
(assert true "true literal")
(assert (not nil) "nil literal")
(assert (= 7 (| 3 4)) "bit or")
(assert (= 0 (& 3 4)) "bit and")

# Set global variables to prevent some possible compiler optimizations that defeat point of the test
(var zero 0)
(var one 1)
(var two 2)
(var three 3)
(var plus +)
(assert (= 22 (plus one (plus 1 2 two) (plus 8 (plus zero 1) 4 three))) "nested function calls")

# Mcarthy's 91 function
(var f91 nil)
(:= f91 (fn [n] (if (> n 100) (- n 10) (f91 (f91 (+ n 11))))))
(assert (= 91 (f91 10)), "f91(10) = 91")
(assert (= 91 (f91 11)), "f91(11) = 91")
(assert (= 91 (f91 20)), "f91(20) = 91")
(assert (= 91 (f91 31)), "f91(31) = 91")
(assert (= 91 (f91 100)), "f91(100) = 91")
(assert (= 91 (f91 101)), "f91(101) = 91")
(assert (= 92 (f91 102)), "f91(102) = 92")
(assert (= 93 (f91 103)), "f91(103) = 93")
(assert (= 94 (f91 104)), "f91(104) = 94")

# Fibonacci
(def fib (do (var fib nil) (:= fib (fn [n] (if (< n 2) n (+ (fib (- n 1)) (fib (- n 2))))))))
(def fib2 (fn fib2 [n] (if (< n 2) n (+ (fib2 (- n 1)) (fib2 (- n 2))))))

(assert (= (fib 0) (fib2 0) 0) "fib(0)")
(assert (= (fib 1) (fib2 1) 1) "fib(1)")
(assert (= (fib 2) (fib2 2) 1) "fib(2)")
(assert (= (fib 3) (fib2 3) 2) "fib(3)")
(assert (= (fib 4) (fib2 4) 3) "fib(4)")
(assert (= (fib 5) (fib2 5) 5) "fib(5)")
(assert (= (fib 6) (fib2 6) 8) "fib(6)")
(assert (= (fib 7) (fib2 7) 13) "fib(7)")
(assert (= (fib 8) (fib2 8) 21) "fib(8)")
(assert (= (fib 9) (fib2 9) 34) "fib(9)")
(assert (= (fib 10) (fib2 10) 55) "fib(10)")

# Closure in non function scope
(def outerfun (fn [x y]
    (def c (do
      (def someval (+ 10 y))
      (def ctemp (if x (fn [] someval) (fn [] y)))
      ctemp
    ))
    (+ 1 2 3 4 5 6 7)
    c))

(assert (= ((outerfun 1 2)) 12) "inner closure 1")
(assert (= ((outerfun nil 2)) 2) "inner closure 2")
(assert (= ((outerfun false 3)) 3) "inner closure 3")

(assert (= '(1 2 3) (quote (1 2 3)) (tuple 1 2 3)) "quote shorthand")

((fn []
	(var accum 1)
	(var count 0)
	(while (< count 16)
		(:= accum (<< accum 1))
		(:= count (+ 1 count)))
	(assert (= accum 65536) "loop in closure")))

(var accum 1)
(var count 0)
(while (< count 16)
	(:= accum (<< accum 1))
	(:= count (+ 1 count)))
(assert (= accum 65536) "loop globally")

(assert (= (struct 1 2 3 4 5 6 7 8) (struct 7 8 5 6 3 4 1 2)) "struct order does not matter 1")
(assert (= (struct 
            :apple 1 
            6 :bork
            '(1 2 3) 5)
         (struct 
            6 :bork
            '(1 2 3) 5
            :apple 1)) "struct order does not matter 2")

# Symbol function

(assert (= (symbol "abc" 1 2 3) 'abc123) "symbol function")

# Fiber tests

(def afiber (fiber.new (fn [x]
	(error (string "hello, " x)))))

(def afiber-result (fiber.resume afiber "world!"))

(assert (= afiber-result "hello, world!") "fiber error result")
(assert (= (fiber.status afiber) :error) "fiber error status")

# yield tests

(def t (fiber.new (fn [] (fiber.yield 1) (fiber.yield 2) 3)))

(assert (= 1 (fiber.resume t)) "initial transfer to new fiber")
(assert (= 2 (fiber.resume t)) "second transfer to fiber")
(assert (= 3 (fiber.resume t)) "return from fiber")
(assert (= (fiber.status t) :dead) "finished fiber is dead")

# Var arg tests

(def vargf (fn [more] (apply + more)))

(assert (= 0 (vargf @[])) "var arg no arguments")
(assert (= 1 (vargf @[1])) "var arg no packed arguments")
(assert (= 3 (vargf @[1 2])) "var arg tuple size 1")
(assert (= 10 (vargf @[1 2 3 4])) "var arg tuple size 2, 2 normal args")
(assert (= 110 (vargf @[1 2 3 4 10 10 10 10 10 10 10 10 10 10])) "var arg large tuple")

# Higher order functions

(def compose (fn [f g] (fn [& xs] (f (apply g xs)))))

(def -+ (compose - +))
(def +- (compose + -))

(assert (= (-+ 1 2 3 4) -10) "compose - +")
(assert (= (+- 1 2 3 4) -8) "compose + -")
(assert (= ((compose -+ +-) 1 2 3 4) 8) "compose -+ +-")
(assert (= ((compose +- -+) 1 2 3 4) 10) "compose +- -+")

# UTF-8

#🐙🐙🐙🐙

(def 🦊 :fox)
(def 🐮 :cow)
(assert (= (string "🐼" 🦊 🐮) "🐼:fox:cow") "emojis 🙉 :)")
(assert (not= 🦊 :🦊) "utf8 strings are not symbols and vice versa")

# Symbols with @ character

(def @ 1)
(assert (= @ 1) "@ symbol")
(def @@ 2)
(assert (= @@ 2) "@@ symbol")
(def @hey 3)
(assert (= @hey 3) "@hey symbol")

# Merge sort

# Imperative merge sort merge
(def merge (fn [xs ys] 
    (def ret @[])
    (def xlen (length xs))
    (def ylen (length ys))
    (var i 0)
    (var j 0)
    # Main merge
    (while (if (< i xlen) (< j ylen))
      (def xi (get xs i))
      (def yj (get ys j))
      (if (< xi yj)
        (do (array.push ret xi) (:= i (+ i 1)))    
        (do (array.push ret yj) (:= j (+ j 1)))))
    # Push rest of xs
    (while (< i xlen)
      (def xi (get xs i))
      (array.push ret xi)
      (:= i (+ i 1)))    
    # Push rest of ys
    (while (< j ylen)
      (def yj (get ys j))
      (array.push ret yj)
      (:= j (+ j 1)))    
    ret))

(assert (apply <= (merge @[1 3 5] @[2 4 6])) "merge sort merge 1")
(assert (apply <= (merge @[1 2 3] @[4 5 6])) "merge sort merge 2")
(assert (apply <= (merge @[1 3 5] @[2 4 6 6 6 9])) "merge sort merge 3")
(assert (apply <= (merge '(1 3 5) @[2 4 6 6 6 9])) "merge sort merge 4")

# Gensym tests

(assert (not= (gensym) (gensym)) "two gensyms not equal")
(assert (not= (gensym 'abc) (gensym 'abc)) "two gensyms with arg not equal")
((fn []
	(def syms (table))
	(var count 0)
	(while (< count 128)
		(put syms (gensym 'beep) true)
		(:= count (+ 1 count)))
	(assert (= (length syms) 128) "many symbols")))

# Let

(assert (= (let [a 1 b 2] (+ a b)) 3), "simple let")
(assert (= (let [[a b] @[1 2]] (+ a b)) 3), "destructured let")
(assert (= (let [[a [c d] b] @[1 (tuple 4 3) 2]] (+ a b c d)) 10), "double destructured let")

# Macros

(defn dub [x] (+ x x))
(assert (= 2 (dub 1)) "defn macro")
(do 
 (defn trip [x] (+ x x x))
 (assert (= 3 (trip 1)) "defn macro triple"))
(do
 (var i 0)
 (when true
  (++ i)
  (++ i)
  (++ i)
  (++ i)
  (++ i)
  (++ i))
 (assert (= i 6) "when macro"))

(end-suite)