;; Copyright (C) Marc Nieper-Wißkirchen (2016, 2017).  All Rights
;; Reserved.

;; Permission is hereby granted, free of charge, to any person
;; obtaining a copy of this software and associated documentation
;; files (the "Software"), to deal in the Software without
;; restriction, including without limitation the rights to use, copy,
;; modify, merge, publish, distribute, sublicense, and/or sell copies
;; of the Software, and to permit persons to whom the Software is
;; furnished to do so, subject to the following conditions:

;; The above copyright notice and this permission notice shall be
;; included in all copies or substantial portions of the Software.

;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
;; EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
;; MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
;; NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
;; BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
;; ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
;; CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
;; SOFTWARE.

(define comparator (make-default-comparator))
(define hashmap0 #f)
(define hashmap1 #f)
(define hashmap2 #f)
(define hashmap3 #f)
(define hashmap4 #f)
(define hashmap5 #f)
(define hashmap6 #f)

(test-begin "SRFI 146: Hashmaps")

(test-group "Predicates"
  (set! hashmap0 (hashmap comparator))
  (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))
  (set! hashmap2 (hashmap comparator 'c 1 'd 2 'e 3))
  (set! hashmap3 (hashmap comparator 'd 1 'e 2 'f 3))

  (test-assert "hashmap?: a hashmap"
	       (hashmap? (hashmap comparator)))

  (test-assert "hashmap?: not a hashmap"
	       (not (hashmap? (list 1 2 3))))

  (test-assert "hashmap-empty?: empty hashmap"
	       (hashmap-empty? hashmap0))

  (test-assert "hashmap-empty?: non-empty hashmap"
	       (not (hashmap-empty? hashmap1)))

  (test-assert "hashmap-contains?: containing"
	       (hashmap-contains? hashmap1 'b))

  (test-assert "hashmap-contains?: not containing"
	       (not (hashmap-contains? hashmap1 '2)))

  (test-assert "hashmap-disjoint?: disjoint"
	       (hashmap-disjoint? hashmap1 hashmap3))

  (test-assert "hashmap-disjoint?: not disjoint"
	       (not (hashmap-disjoint? hashmap1 hashmap2))))

(test-group "Accessors"
  (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))

  (test-equal "hashmap-ref: key found"
	      2
	      (hashmap-ref hashmap1 'b))

  (test-equal "hashmap-ref: key not found/with failure"
	      42
	      (hashmap-ref hashmap1 'd (lambda () 42)))

  (test-error "hashmap-ref: key not found/without failure"
	      (hashmap-ref hashmap1 'd))

  (test-equal "hashmap-ref: with success procedure"
	      (* 2 2)
	      (hashmap-ref hashmap1 'b (lambda () #f) (lambda (x) (* x x))))

  (test-equal "hashmap-ref/default: key found"
	      3
	      (hashmap-ref/default hashmap1 'c 42))

  (test-equal "hashmap-ref/default: key not found"
	      42
	      (hashmap-ref/default hashmap1 'd 42))

  (test-equal "hashmap-key-comparator"
	      comparator
	      (hashmap-key-comparator hashmap1)))

(test-group "Updaters"
  (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))
  (set! hashmap2 (hashmap-set hashmap1 'c 4 'd 4 'd 5))
  (set! hashmap3 (hashmap-update hashmap1 'b (lambda (x) (* x x))))
  (set! hashmap4 (hashmap-update/default hashmap1 'd (lambda (x) (* x x)) 4))
  (set! hashmap5 (hashmap-adjoin hashmap1 'c 4 'd 4 'd 5))
  (set! hashmap0 (hashmap comparator))

  (test-equal "hashmap-adjoin: key already in hashmap"
	      3
	      (hashmap-ref hashmap5 'c))

  (test-equal "hashmap-adjoin: key set earlier"
	      4
	      (hashmap-ref hashmap5 'd))

  (test-equal "hashmap-set: key already in hashmap"
	      4
	      (hashmap-ref hashmap2 'c))

  (test-equal "hashmap-set: key set earlier"
	      5
	      (hashmap-ref hashmap2 'd))

  (test-equal "hashmap-replace: key not in hashmap"
	      #f
	      (hashmap-ref/default (hashmap-replace hashmap1 'd 4) 'd #f))

  (test-equal "hashmap-replace: key in hashmap"
	      6
	      (hashmap-ref (hashmap-replace hashmap1 'c 6) 'c))

  (test-equal "hashmap-delete"
	      42
	      (hashmap-ref/default (hashmap-delete hashmap1 'b) 'b 42))

  (test-equal "hashmap-delete-all"
	      42
	      (hashmap-ref/default (hashmap-delete-all hashmap1 '(a b)) 'b 42))

  (test-equal "hashmap-intern: key in hashmap"
	      (list hashmap1 2)
	      (receive result
	          (hashmap-intern hashmap1 'b (lambda () (error "should not have been invoked")))
	        result))

  (test-equal "hashmap-intern: key not in hashmap"
	      (list 42 42)
	      (receive (hashmap value)
	          (hashmap-intern hashmap1 'd (lambda () 42))
	        (list value (hashmap-ref hashmap 'd))))

  (test-equal "hashmap-update"
	      4
	      (hashmap-ref hashmap3 'b))

  (test-equal "hashmap-update/default"
	      16
	      (hashmap-ref hashmap4 'd))

  (test-equal "hashmap-pop: empty hashmap"
	      'empty
	      (hashmap-pop hashmap0 (lambda () 'empty)))

  (test-assert "hashmap-pop: non-empty hashmap"
	       (member
	        (receive (hashmap key value)
	            (hashmap-pop hashmap1)
	          (list (hashmap-size hashmap) key value))
	        '((2 a 1) (2 b 2) (2 c 3)))))

(test-group "The whole hashmap"
  (set! hashmap0 (hashmap comparator))
  (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))

  (test-equal "hashmap-size: empty hashmap"
	      0
	      (hashmap-size hashmap0))

  (test-equal "hashmap-size: non-empty hashmap"
	      3
	      (hashmap-size hashmap1))

  (test-equal "hashmap-find: found in hashmap"
	      (list 'b 2)
	      (receive result
	          (hashmap-find (lambda (key value)
			          (and (eq? key 'b)
			               (= value 2)))
			        hashmap1
			        (lambda () (error "should not have been called")))
	        result))

  (test-equal "hashmap-find: not found in hashmap"
	      (list 42)
	      (receive result
	          (hashmap-find (lambda (key value)
			          (eq? key 'd))
			        hashmap1
			        (lambda ()
			          42))
	        result))

  (test-equal "hashmap-count"
	      2
	      (hashmap-count (lambda (key value)
		               (>= value 2))
		             hashmap1))

  (test-assert "hashmap-any?: found"
	       (hashmap-any? (lambda (key value)
		               (= value 3))
		             hashmap1))

  (test-assert "hashmap-any?: not found"
	       (not (hashmap-any? (lambda (key value)
			            (= value 4))
			          hashmap1)))

  (test-assert "hashmap-every?: true"
	       (hashmap-every? (lambda (key value)
			         (<= value 3))
		               hashmap1))

  (test-assert "hashmap-every?: false"
	       (not (hashmap-every? (lambda (key value)
			              (<= value 2))
			            hashmap1)))

  (test-equal "hashmap-keys"
	      3
	      (length (hashmap-keys hashmap1)))

  (test-equal "hashmap-values"
	      6
	      (fold + 0 (hashmap-values hashmap1)))

  (test-equal "hashmap-entries"
	      (list 3 6)
	      (receive (keys values)
	          (hashmap-entries hashmap1)
	        (list (length keys) (fold + 0 values)))))

(test-group "Hashmap and folding"
  (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))
  (set! hashmap2 (hashmap-map (lambda (key value)
				  (values (symbol->string key)
					  (* 10 value)))
			        comparator
			        hashmap1))

  (test-equal "hashmap-map"
	      20
	      (hashmap-ref hashmap2 "b"))

  (test-equal "hashmap-for-each"
	      6
	      (let ((counter 0))
	        (hashmap-for-each (lambda (key value)
			            (set! counter (+ counter value)))
			          hashmap1)
	        counter))

  (test-equal "hashmap-fold"
	      6
	      (hashmap-fold (lambda (key value acc)
		              (+ value acc))
		            0
		            hashmap1))

  (test-equal "hashmap-map->list"
	      (+ (* 1 1) (* 2 2) (* 3 3))
	      (fold + 0 (hashmap-map->list (lambda (key value)
				             (* value value))
				           hashmap1)))

  (test-equal "hashmap-filter"
	      2
	      (hashmap-size (hashmap-filter (lambda (key value)
				              (<= value 2))
				            hashmap1)))

  (test-equal "hashmap-remove"
	      1
	      (hashmap-size (hashmap-remove (lambda (key value)
				              (<= value 2))
				            hashmap1)))

  (test-equal "hashmap-partition"
	      (list 1 2)
	      (receive result
	          (hashmap-partition (lambda (key value)
			               (eq? 'b key))
			             hashmap1)
	        (map hashmap-size result)))

  (test-group "Copying and conversion"
    (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))
    (set! hashmap2 (alist->hashmap comparator '((a . 1) (b . 2) (c . 3))))
    (set! hashmap3 (alist->hashmap! (hashmap-copy hashmap1) '((d . 4) '(c . 5))))

    (test-equal "hashmap-copy: same size"
	        3
	        (hashmap-size (hashmap-copy hashmap1)))

    (test-equal "hashmap-copy: same comparator"
	        comparator
	        (hashmap-key-comparator (hashmap-copy hashmap1)))

    (test-equal "hashmap->alist"
	        (cons 'b 2)
	        (assq 'b (hashmap->alist hashmap1)))

    (test-equal "alist->hashmap"
	        2
	        (hashmap-ref hashmap2 'b)
	        )

    (test-equal "alist->hashmap!: new key"
	        4
	        (hashmap-ref hashmap3 'd))

    (test-equal "alist->hashmap!: existing key"
	        3
	        (hashmap-ref hashmap3 'c)))

  (test-group "Subhashmaps"
    (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))
    (set! hashmap2 (hashmap comparator 'a 1 'b 2 'c 3))
    (set! hashmap3 (hashmap comparator 'a 1 'c 3))
    (set! hashmap4 (hashmap comparator 'a 1 'c 3 'd 4))
    (set! hashmap5 (hashmap comparator 'a 1 'b 2 'c 6))
    (set! hashmap6 (hashmap (make-comparator (comparator-type-test-predicate comparator)
					       (comparator-equality-predicate comparator)
					       (comparator-ordering-predicate comparator)
					       (comparator-hash-function comparator))
			      'a 1 'b 2 'c 3))


    (test-assert "hashmap=?: equal hashmaps"
	         (hashmap=? comparator hashmap1 hashmap2))

    (test-assert "hashmap=?: unequal hashmaps"
	         (not (hashmap=? comparator hashmap1 hashmap4)))

    (test-assert "hashmap=?: different comparators"
	         (not (hashmap=? comparator hashmap1 hashmap6)))

    (test-assert "hashmap<?: proper subset"
	         (hashmap<? comparator hashmap3 hashmap1))

    (test-assert "hashmap<?: improper subset"
	         (not (hashmap<? comparator hashmap3 hashmap1 hashmap2)))

    (test-assert "hashmap>?: proper superset"
	         (hashmap>? comparator hashmap2 hashmap3))

    (test-assert "hashmap>?: improper superset"
	         (not (hashmap>? comparator hashmap1 hashmap2 hashmap3)))

    (test-assert "hashmap<=?: subset"
	         (hashmap<=? comparator hashmap3 hashmap2 hashmap1))

    (test-assert "hashmap<=?: non-matching values"
	         (not (hashmap<=? comparator hashmap3 hashmap5)))

    (test-assert "hashmap<=?: not a subset"
	         (not (hashmap<=? comparator hashmap2 hashmap4)))

    (test-assert "hashmap>=?: superset"
	         (hashmap>=? comparator hashmap4 hashmap3))

    (test-assert "hashmap>=?: not a superset"
	         (not (hashmap>=? comparator hashmap5 hashmap3))))

  (test-group "Set theory operations"
    (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))
    (set! hashmap2 (hashmap comparator 'a 1 'b 2 'd 4))
    (set! hashmap3 (hashmap comparator 'a 1 'b 2))
    (set! hashmap4 (hashmap comparator 'a 1 'b 2 'c 4))
    (set! hashmap5 (hashmap comparator 'a 1 'c 3))
    (set! hashmap6 (hashmap comparator 'd 4 'e 5 'f 6))

    (test-equal "hashmap-union: new association"
	        4
	        (hashmap-ref (hashmap-union hashmap1 hashmap2) 'd))

    (test-equal "hashmap-union: existing association"
	        3
	        (hashmap-ref (hashmap-union hashmap1 hashmap4) 'c))

    (test-equal "hashmap-union: three hashmaps"
	        6
	        (hashmap-size (hashmap-union hashmap1 hashmap2 hashmap6)))

    (test-equal "hashmap-intersection: existing association"
	        3
	        (hashmap-ref (hashmap-intersection hashmap1 hashmap4) 'c))

    (test-equal "hashmap-intersection: removed association"
	        42
	        (hashmap-ref/default (hashmap-intersection hashmap1 hashmap5) 'b 42))

    (test-equal "hashmap-difference"
	        2
	        (hashmap-size (hashmap-difference hashmap2 hashmap6)))

    (test-equal "hashmap-xor"
	        4
	        (hashmap-size (hashmap-xor hashmap2 hashmap6))))

  (test-group "Comparators"
    (set! hashmap1 (hashmap comparator 'a 1 'b 2 'c 3))
    (set! hashmap2 (hashmap comparator 'a 1 'b 2 'c 3))
    (set! hashmap3 (hashmap comparator 'a 1 'b 2))
    (set! hashmap4 (hashmap comparator 'a 1 'b 2 'c 4))
    (set! hashmap5 (hashmap comparator 'a 1 'c 3))
    (set! hashmap0 (hashmap comparator
			      hashmap1 "a"
			      hashmap2 "b"
			      hashmap3 "c"
			      hashmap4 "d"
			      hashmap5 "e"))

    (test-assert "hashmap-comparator"
	         (comparator? hashmap-comparator))

    (test-equal "hashmap-keyed hashmap"
	        (list "a" "a" "c" "d" "e")
	        (list (hashmap-ref hashmap0 hashmap1)
		      (hashmap-ref hashmap0 hashmap2)
		      (hashmap-ref hashmap0 hashmap3)
		      (hashmap-ref hashmap0 hashmap4)
		      (hashmap-ref hashmap0 hashmap5)
		      ))

    (test-group "Ordering comparators"
      (test-assert "=?: equal hashmaps"
	           (=? comparator hashmap1 hashmap2))

      (test-assert "=?: unequal hashmaps"
	           (not (=? comparator hashmap1 hashmap4))))))

(test-end "SRFI 146: Hashmaps")