From a37c3602e0deaa6da902b1202325b80624e21724 Mon Sep 17 00:00:00 2001
From: Timotej Lazar <timotej.lazar@fri.uni-lj.si>
Date: Sun, 20 Mar 2016 17:13:12 +0100
Subject: Prolog: add triggers for palindrome/min/max hints

---
 prolog/problems/lists_advanced/min_2/common.py | 42 +++++++++++++++++++++++---
 prolog/problems/lists_advanced/min_2/sl.py     | 24 +++++++++++++++
 2 files changed, 62 insertions(+), 4 deletions(-)

(limited to 'prolog/problems/lists_advanced/min_2')

diff --git a/prolog/problems/lists_advanced/min_2/common.py b/prolog/problems/lists_advanced/min_2/common.py
index f2412fd..c9a697c 100644
--- a/prolog/problems/lists_advanced/min_2/common.py
+++ b/prolog/problems/lists_advanced/min_2/common.py
@@ -26,6 +26,12 @@ hint_type = {
     'base_case': Hint('base_case'),
     'recursive_case': Hint('recursive_case'),
     'timeout': Hint('timeout'),
+    'empty_list_base_case': Hint('empty_list_base_case'),
+    'list_instead_of_elem_base_case': Hint('list_instead_of_elem_base_case'),
+    'duplicates_not_covered': Hint('duplicates_not_covered'),
+    'args_not_instantiated': Hint('args_not_instantiated'),
+    'unprotected_branch': Hint('unprotected_branch'),
+    'one_branch_missing': Hint('one_branch_missing'),
 }
 
 test_cases = [
@@ -72,14 +78,42 @@ def hint(code, aux_code):
             return [{'id': 'eq_instead_of_equ_markup', 'start': m[0], 'end': m[1]} for m in marks] + \
                    [{'id': 'eq_instead_of_equ'}]
 
-        # missing/failed base case
-        if not prolog.engine.ask_truthTO(engine_id, 'min([-45], -45)'):
-            return [{'id': 'base_case'}]
-
         # target predicate seems to always be false
         if not prolog.engine.ask_truthTO(engine_id, 'min(_, _)'):
             return [{'id': 'predicate_always_false'}]
 
+        if prolog.engine.ask_truthTO(engine_id, 'min([], _)'):
+            return [{'id': 'empty_list_base_case'}]
+
+        if prolog.engine.ask_truthTO(engine_id, 'min([39], [39])'):
+            return [{'id': 'list_instead_of_elem_base_case'}]
+
+        if prolog.engine.ask_truthTO(engine_id,
+                'min([1, 3, 9], 1), min([3, 9, 27, 1], 1), \+ min([3, 3, 3], 3)'):
+            return [{'id': 'duplicates_not_covered'}]
+
+        reply, output = prolog.engine.ask(engine_id,
+                'min([1, 2, 2, 2, 3], 1), min([3, 2, 2, 2, 1], 1)', timeout=1)
+        if reply.get('code') == 'instantiation_error':
+            return [{'id': 'args_not_instantiated'}]
+
+        # TODO is the ! necessary here?
+        if prolog.engine.ask_truthTO(engine_id,
+                'findall(M, min([1, 5, 2, 4, 3], M), L), member(X, L), X > 1, !'):
+            return [{'id': 'unprotected_branch'}]
+
+        if prolog.engine.ask_truthTO(engine_id, '''\
+                min([1, 2, 3, 4, 5], 1),
+                \+ min([5, 4, 3, 2, 1], 1)
+                ;
+                \+ min([1, 2, 3, 4, 5], 1),
+                min([5, 4, 3, 2, 1], 1)'''):
+            return [{'id': 'one_branch_missing'}]
+
+        # missing/failed base case
+        if not prolog.engine.ask_truthTO(engine_id, 'min([-45], -45)'):
+            return [{'id': 'base_case'}]
+
         # base case works, the recursive doesn't (but it doesn't timeout)
         # this may be left as the last, most generic hint
         if not prolog.engine.ask_truth(engine_id, 'min([2, 41, -22], -22)'):
diff --git a/prolog/problems/lists_advanced/min_2/sl.py b/prolog/problems/lists_advanced/min_2/sl.py
index 38581d6..8f80e3f 100644
--- a/prolog/problems/lists_advanced/min_2/sl.py
+++ b/prolog/problems/lists_advanced/min_2/sl.py
@@ -43,5 +43,29 @@ da je <code>X</code> hkrati starš in sestra od <code>Y</code> ali kaj podobno z
     'timeout': '''\
 <p>Je morda na delu potencialno neskončna rekurzija? Kako se bo ustavila?</p>
 <p>Morda pa je kriv tudi manjkajoč, neustrezen ali preprosto nekompatibilen (s splošnim primerom) robni pogoj?</p>
+''',
+
+    'empty_list_base_case': '''\
+<p>empty_list_base_case</p>
+''',
+
+    'list_instead_of_elem_base_case': '''\
+<p>list_instead_of_elem_base_case</p>
+''',
+
+    'duplicates_not_covered': '''\
+<p>duplicates_not_covered</p>
+''',
+
+    'args_not_instantiated': '''\
+<p>args_not_instantiated</p>
+''',
+
+    'unprotected_branch': '''\
+<p>unprotected_branch</p>
+''',
+
+    'one_branch_missing': '''\
+<p>one_branch_missing</p>
 ''',
 }
-- 
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