local LOG = log
local function log(x) LOG(serpent.block(x)) end

local ko_items = {}
local no_recipe_items = {}
local ko_recipes = {}

local function mark_accessible(name)
  ko_items[name] = nil
  no_recipe_items[name] = nil
end

for name in pairs(data.raw.item) do
  ko_items[name] = true
  no_recipe_items[name] = true
end
for name in pairs(data.raw.fluid) do
  ko_items[name] = true
end
for name in pairs(data.raw["autoplace-control"]) do
  mark_accessible(name)
end

local ignore_from_base = {
  "belt-immunity-equipment",
  "coin",
  "computer",
  "infinity-chest",
  "raw-wood",
  "simple-entity",
  "simple-entity-with-force",
  "simple-entity-with-owner",
  "used-up-uranium-fuel-cell",
}
for _, name in ipairs(ignore_from_base) do
  mark_accessible(name)
end

local changed = true
while changed do
  log("starting pass")
  changed = false
  for name, recipe in pairs(data.raw.recipe) do
    if recipe.normal then recipe = recipe.normal end
    local missing = {}
    for _, ing in ipairs(recipe.ingredients) do
      local ingredient_name = ing.name or ing[1]
      if ko_items[ingredient_name] then
        if name == "battery" then
          log(ingredient_name)
        end
        missing[#missing+1] = ingredient_name
      end
    end

    if next(missing) then
      ko_recipes[name] = missing
    else
      ko_recipes[name] = nil
    end

    local results = recipe.results or {{recipe.result, 1}}
    for _, result in ipairs(results) do
      local result_name = result.name or result[1]
      no_recipe_items[result_name] = nil
      if not next(missing) and ko_items[result_name] then
        log("marking "..result_name.." as accessible via recipe "..name)
        mark_accessible(result_name)
        changed = true
      end
    end
  end
end

local function count(t)
  local i = 0
  for _ in pairs(t) do
    i = i + 1
  end
  return i
end

--log(ok_items)
log("Found "..count(no_recipe_items).. " items without recipes or autoplace-controls:")
log(no_recipe_items)
log("Found "..count(ko_items).." inaccessible items:")
log(ko_items)
log("Found "..count(ko_recipes).." inaccessible recipes:")
log(ko_recipes)