1 files changed, 68 insertions, 44 deletions
diff --git a/mc-resources.py b/mc-resources.py
index ef4cb31..dadd79d 100644
--- a/mc-resources.py
+++ b/mc-resources.py
@@ -208,6 +208,7 @@ def choose_recipe_for_item(dest_item):
   if dest_item in chosen_recipes:
     return chosen_recipes[dest_item]
   if dest_item not in recipe_lists:
+    chosen_recipes[dest_item] = None
     return None
   recipes = recipe_lists[dest_item]
   choices = {'gather': (None, {})}
@@ -241,29 +242,23 @@ def choose_recipe_for_item(dest_item):
     chosen_tags[tag] = tag_map[tag]
   return recipe
 
-# dependees
-item_deps_added = []
-
-# dependency -> dependee
+# dependee -> dependency
 item_deps = {}
 
 items_needed = {}
 
 def add_item_deps(item):
-  if item not in item_deps_added:
-    item_deps_added.append(item)
-    if item not in item_deps:
-      item_deps[item] = []
-    recipe = choose_recipe_for_item(item)
-    if recipe is not None:
-      for dep, _ in recipe[1]:
-        if dep[0] == '#':
-          dep = chosen_tags[dep[1:]]
-        if dep in item_deps:
-          item_deps[dep].append(item)
-        else:
-          item_deps[dep] = [item]
-        add_item_deps(dep)
+  if item in item_deps:
+    return
+  item_deps[item] = []
+  recipe = choose_recipe_for_item(item)
+  if recipe is None:
+    return
+  for dep, _ in recipe[1]:
+    if dep[0] == '#':
+      dep = chosen_tags[dep[1:]]
+    item_deps[item].append(dep)
+    add_item_deps(dep)
 
 def add_needed_item(item, count):
   if item in items_needed:
@@ -308,39 +303,17 @@ while True:
       continue
     break
 
+
 while True:
   for item in items_needed:
     add_item_deps(item)
 
   original_needed = items_needed.copy()
-  steps = []
-  gather_steps = []
 
   ts = graphlib.TopologicalSorter(item_deps)
 
   try:
-    for item in ts.static_order():
-      if item in items_needed:
-        needed = items_needed[item]
-        if needed == 0:
-          continue
-        recipe = choose_recipe_for_item(item)
-        if recipe is None:
-          gather_steps.append(f'gather {needed} {to_display_name(item)}')
-          add_needed_item(item, -needed)
-        else:
-          count = (needed - 1) // recipe[3] + 1
-          ingredients = []
-          for ingredient, c in recipe[1]:
-            if ingredient[0] == '#':
-              ingredients.append((chosen_tags[ingredient[1:]], c))
-            else:
-              ingredients.append((ingredient, c))
-          source = join_with_and([f'{c * count} {to_display_name(i)}' for i, c in ingredients])
-          steps.append(f'{recipe[0]} {source} into {recipe[3] * count} {to_display_name(recipe[2])}')
-          for i, c in ingredients:
-            add_needed_item(i, c * count)
-          add_needed_item(item, -recipe[3] * count)
+    ts.prepare()
 
   except graphlib.CycleError as ex:
     print('cycle detected: ' + ' from '.join(to_display_name(id) for id in ex.args[1]))
@@ -357,10 +330,61 @@ while True:
 
   break
 
+gathers = []
+order = []
+
+while ts.is_active():
+  ready_smelt = []
+  ready_nonsmelt = []
+  ready = ts.get_ready()
+  for id in ready:
+    recipe = chosen_recipes[id]
+    if recipe is None:
+      gathers.append(id)
+    elif recipe[0] == 'smelt':
+      ready_smelt.append(id)
+    else:
+      ready_nonsmelt.append(id)
+    ts.done(id)
+  ready_smelt.sort()
+  ready_nonsmelt.sort()
+  order += ready_smelt + ready_nonsmelt
+
+order.reverse()
+
+steps = []
+
+for item in order:
+  if item in items_needed:
+    needed = items_needed[item]
+    if needed == 0:
+      continue
+    recipe = choose_recipe_for_item(item)
+    count = (needed - 1) // recipe[3] + 1
+    ingredients = []
+    for ingredient, c in recipe[1]:
+      if ingredient[0] == '#':
+        ingredients.append((chosen_tags[ingredient[1:]], c))
+      else:
+        ingredients.append((ingredient, c))
+    source = join_with_and([f'{c * count} {to_display_name(i)}' for i, c in ingredients])
+    steps.append(f'{recipe[0]} {source} into {recipe[3] * count} {to_display_name(recipe[2])}')
+    for i, c in ingredients:
+      add_needed_item(i, c * count)
+    add_needed_item(item, -recipe[3] * count)
+
+gathers.sort()
+gathers.reverse()
+
+for item in gathers:
+  if item in items_needed:
+    needed = items_needed[item]
+    if needed != 0:
+      steps.append(f'gather {needed} {to_display_name(item)}')
+      items_needed[item] = 0
+
 steps.reverse()
 print('steps:')
-for step in gather_steps:
-  print('  ' + step)
 for step in steps:
   print('  ' + step)