Ver el código de «Módulo:LootChest»

local p = {

	calc_average_amount_this_item_per_pool = function( 
			min_stacksize, max_stacksize,
			min_pool_rolls, max_pool_rolls, 
			item_weight, pool_total_item_weight )

		local avg_stacksize = ( min_stacksize + max_stacksize ) / 2
		local avg_rolls = ( min_pool_rolls + max_pool_rolls ) / 2
		
		return avg_stacksize * avg_rolls * item_weight / pool_total_item_weight
		
	end,
	
	calc_chance_any_of_this_item_per_pool = function( 
			min_pool_rolls, max_pool_rolls,
			item_weight, pool_total_item_weight )

		local avg_rolls = ( min_pool_rolls + max_pool_rolls ) / 2
		local relativeweight = item_weight / pool_total_item_weight
		
		return 1 - math.pow( 1 - relativeweight, avg_rolls )
		
	end,
	
	dev = 'In {{1.9}},{{upcoming}} ',
	
	-- these define which sprite, label and link to use, in the table,
	-- and 'cannot_stack' and 'plural' dictate how to display the single-item summary
	
	-- NOTE: order in this list doesn't matter.

	items = {
		["acacia-wood"]         = { "block", link="Wood", title="Acacia or Dark Oak Wood", plural=false },
		["acacia-wood-only"]    = { "block", id='acacia-wood', link="Wood", title="Acacia Wood", plural=false },
		["activator-rail"]      = { "block", title="Activator Rails", plural=false },
		["apple"]               = { "item" },
		["beetroot-seeds"]      = { "item", link="Beetroot Seeds", plural=false },
		["bone"]                = { "item" },
		["book"]                = { "item" },
		["bread"]               = { "item", plural=false },
		["bucket"]              = { "item" },
		["coal"]                = { "item", plural=false },
		["compass"]             = { "item" },
		["detector-rail"]       = { "block", title="Detector Rails", plural=false },
		["diamond"]             = { "item" },
		["disc-13"]             = { "item", title="Music Disc (13)", link="Music Disc", cannot_stack=true, plural=false },
		["disc-cat"]            = { "item", title="Music Disc (Cat)", link="Music Disc", cannot_stack=true, plural=false },
		["emerald"]             = { "item" },
		["empty-map"]           = { "item", link="Map", title="Empty Map" },
		["enchanted-book"]      = { "item", cannot_stack=true, note="level-book" },
		["enchanted-book-rnd"]  = { "item", id='enchanted-book', title="Enchanted Book", link="Enchanted Book", cannot_stack=true, note="random-book" },
		["ender-pearl"]         = { "item" },
		["flint-and-steel"]     = { "item", cannot_stack=true, plural=false },
		["golden-apple"]        = { "item", title="Golden Apple (Normal)", plural="Golden Apples (Normal)" },
		["golden-chestplate"]   = { "item", link="Armor", cannot_stack=true },
		["golden-sword"]        = { "item", link="Sword", cannot_stack=true },
		["gold-ingot"]          = { "item" },
		["gold-nugget"]         = { "item" },
		["gunpowder"]           = { "item", plural=false },
		["horse-armor-diamond"] = { "item", title="Diamond Horse Armor", link="Horse Armor", cannot_stack=true, plural=false },
		["horse-armor-gold"]    = { "item", title="Gold Horse Armor", link="Horse Armor", cannot_stack=true, plural=false },
		["horse-armor-iron"]    = { "item", title="Iron Horse Armor", link="Horse Armor", cannot_stack=true, plural=false },
		["iron-boots"]          = { "item", link="Armor", cannot_stack=true, plural=false },
		["iron-chestplate"]     = { "item", link="Armor", cannot_stack=true },
		["iron-helmet"]         = { "item", link="Armor", cannot_stack=true },
		["iron-ingot"]          = { "item" },
		["iron-leggings"]       = { "item", link="Armor", cannot_stack=true, plural=false },
		["iron-pickaxe"]        = { "item", link="Pickaxe", cannot_stack=true },
		["iron-sword"]          = { "item", link="Sword", cannot_stack=true },
		["lapis-lazuli"]        = { "item", plural=false },
		["melon-seeds"]         = { "item", plural=false },
		["name-tag"]            = { "item" },
		["notch-apple"]         = { "item", id='golden-apple', link="Golden Apple", title="Golden Apple (Enchanted)", plural="Golden Apples (Enchanted)" },
		["nether-wart"]         = { "item", plural=false },
		["oak-sapling"]         = { "block", link="Sapling" },
		["oak-wood"]            = { "block", link="Wood", title="Oak, Spruce, Birch or Jungle Wood", plural=false },
		["oak-wood-only"]       = { "block", id='oak-wood', link="Wood", title="Oak Wood", plural=false },
		["obsidian"]            = { "block", plural=false },
		["paper"]               = { "item", plural=false },
		["powered-rail"]        = { "block", title="Powered Rails", plural=false },
		["pumpkin-seeds"]       = { "item", plural=false },
		["rail"]                = { "block", title="Rails", plural=false },
		["redstone"]            = { "item", plural=false },
		["rotten-flesh"]        = { "item", plural=false },
		["sand"]                = { "block", plural=false },
		["saddle"]              = { "item", cannot_stack=true },
		["raw-salmon"]          = { "item", plural=false },
		["spider-eye"]          = { "item" },
		["stick"]               = { "item" },
		["stone-axe"]           = { "item", link="Axe", cannot_stack=true },
		["stone-pickaxe"]       = { "item", link="Pickaxe", cannot_stack=true },
		["string"]              = { "item", plural=false },
		["torch"]               = { "block" },
		["wheat"]               = { "item", plural=false },
		["wood-planks"]         = { "block", title="Oak Wood Planks", plural=false },
		["wooden-axe"]          = { "item", link="Axe", cannot_stack=true },
		["wooden-pickaxe"]      = { "item", link="Pickaxe", cannot_stack=true },

		["enchanted-diamond-boots"]      = { "item", id="diamond-boots", link="Diamond Boots", note="end-ench-equipment", cannot_stack=true, plural=false },
		["enchanted-diamond-chestplate"] = { "item", id="diamond-chestplate", link="Diamond Chestplate", note="end-ench-equipment", cannot_stack=true },
		["enchanted-diamond-helmet"]     = { "item", id="diamond-helmet", link="Diamond Helmet", note="end-ench-equipment", cannot_stack=true },
		["enchanted-diamond-leggings"]   = { "item", id="diamond-leggings", link="Diamond Leggings", note="end-ench-equipment", cannot_stack=true, plural=false },
		["enchanted-diamond-pickaxe"]    = { "item", id="diamond-pickaxe", link="Diamond Pickaxe", note="end-ench-equipment", cannot_stack=true },
		["enchanted-diamond-shovel"]     = { "item", id="diamond-shovel", link="Diamond Shovel", note="end-ench-equipment", cannot_stack=true },
		["enchanted-diamond-sword"]      = { "item", id="diamond-sword", link="Diamond Sword", note="end-ench-equipment", cannot_stack=true },
		["enchanted-iron-boots"]         = { "item", id="iron-boots", link="Iron Boots", note="end-ench-equipment", cannot_stack=true, plural=false },
		["enchanted-iron-chestplate"]    = { "item", id="iron-chestplate", link="Iron Chestplate", note="end-ench-equipment", cannot_stack=true },
		["enchanted-iron-helmet"]        = { "item", id="iron-helmet", link="Iron Helmet", note="end-ench-equipment", cannot_stack=true },
		["enchanted-iron-leggings"]      = { "item", id="iron-leggings", link="Iron Leggings", note="end-ench-equipment", cannot_stack=true, plural=false },
		["enchanted-iron-pickaxe"]       = { "item", id="iron-pickaxe", link="Iron Pickaxe", note="end-ench-equipment", cannot_stack=true },
		["enchanted-iron-shovel"]        = { "item", id="iron-shovel", link="Iron Shovel", note="end-ench-equipment", cannot_stack=true },
		["enchanted-iron-sword"]         = { "item", id="iron-sword", link="Iron Sword", note="end-ench-equipment", cannot_stack=true },

		["empty"]                        = { "block", id="air", link='', title='Nothing', plural=false },
	},

	notes = {
		["level-book"] = "<ref group='note' name='level-book'>Enchanted books in the same chest will have the same enchantments (not in {{1.9}}{{upcoming}}). Enchantment probabilities are the same as a level-30 enchantment on an [[enchantment table]], but the chance of multiple enchantments is not reduced.</ref>",
		["end-ench-equipment"] = "<ref group='note' name='end-city-enchantment'>Enchanted items of the same type in the same chest will have the same enchantments. Enchantment probabilities are the same as a level-20 to level-39 <!-- Yes, really 39 even though the table normally only goes to 30  --> enchantment on an [[enchantment table]].</ref>",
		["random-book"] = "<ref group='note' name='random-book'>All enchantments are equally probable, and any level of the enchantment is equally probable.</ref>",
	},
	
	-- NOTE: order here doesn't matter.  
	--		 * in the table, chests will sort in alphabetical order
	--       * in the table, items will sort by chance, then by avg#, then alphabetically.
	--       * If poolsDev is omitted, pools will be used. To omit a pool entirely in the dev version, set poolsDev = {}.
	
	chests = {
		["village-blacksmith"] = { -- village_blacksmith.json
			header = "[[Aldea]]",
			link   = "[[Aldea]]",
			pools = {
				{
					rolls = {3,8},
					items = {
						["diamond"]             = {1,3,3},
						["iron-ingot"]          = {1,5,10},
						["gold-ingot"]          = {1,3,5},
						["bread"]               = {1,3,15},
						["apple"]               = {1,3,15},
						["iron-pickaxe"]        = {1,1,5},
						["iron-sword"]          = {1,1,5},
						["iron-chestplate"]     = {1,1,5},
						["iron-helmet"]         = {1,1,5},
						["iron-leggings"]       = {1,1,5},
						["iron-boots"]          = {1,1,5},
						["obsidian"]            = {3,7,5},
						["oak-sapling"]         = {3,7,5},
						["horse-armor-iron"]    = {1,1,1},
						["horse-armor-gold"]    = {1,1,1},
						["horse-armor-diamond"] = {1,1,1},
						["saddle"]              = {1,1,3}
					}
				},
			}
		},
		["stronghold-altar"] = { -- stronghold_corridor.json
			header      = "Altar",
			superheader = "[[Fotaleza]]",
			link        = "[[Fotaleza]]",
			pools = {
				{
					rolls = {2,3},
					items = {
						["ender-pearl"]         = {1,1,10},
						["diamond"]             = {1,3,3},
						["iron-ingot"]          = {1,5,10},
						["gold-ingot"]          = {1,3,5},
						["redstone"]            = {4,9,5},
						["bread"]               = {1,3,15},
						["apple"]               = {1,3,15},
						["iron-pickaxe"]        = {1,1,5},
						["iron-sword"]          = {1,1,5},
						["iron-chestplate"]     = {1,1,5},
						["iron-helmet"]         = {1,1,5},
						["iron-leggings"]       = {1,1,5},
						["iron-boots"]          = {1,1,5},
						["golden-apple"]        = {1,1,1},
						["saddle"]              = {1,1,1},
						["horse-armor-iron"]    = {1,1,1},
						["horse-armor-gold"]    = {1,1,1},
						["horse-armor-diamond"] = {1,1,1},
						["enchanted-book"]      = {1,1,1},
					}
				},
			}
		},
		["stronghold-library"] = { -- stronghold_library.json
			header      = "Biblioteca",
			superheader = "[[Fortaleza]]",
			link        = "[[Fortaleza]]",
			pools = {
				{
					rolls = {1,4},
					items = {
						["enchanted-book"]      = {1,5,2},
						["book"]                = {1,3,20},
						["paper"]               = {2,7,20},
						["empty-map"]           = {1,1,1},
						["compass"]             = {1,1,1}
					}
				},
			},
			poolsDev = {
				{
					rolls = {2,10},
					items = {
						["book"]                = {1,3,20},
						["paper"]               = {2,7,20},
						["empty-map"]           = {1,1,1},
						["compass"]             = {1,1,1},
						["enchanted-book"]      = {1,1,10},
					}
				},
			}
		},
		["stronghold-storeroom"] = { -- stronghold_crossing.json
			header      = "Despensa",
			superheader = "[[Fortaleza]]",
			link        = "[[Fortaleza]]",
			pools = {
				{
					rolls = {1,4},
					items = {
						["iron-ingot"]          = {1,5,10},
						["gold-ingot"]          = {1,3,5},
						["redstone"]            = {4,9,5},
						["coal"]                = {3,8,10},
						["bread"]               = {1,3,15},
						["apple"]               = {1,3,15},
						["iron-pickaxe"]        = {1,1,1},
						["enchanted-book"]      = {1,1,1},
					}
				},
			}
		},
		["bonus"] = { -- spawn_bonus_chest.json
			header = "[[Chest|Bonus]]",
			link   = "[[Chest|bonus]]",
			pools = {
				{
					rolls = {10,10},
					items = {
						["bread"]               = {2,3,3},
						["apple"]               = {2,3,5},
						["stick"]               = {1,3,10},
						["wood-planks"]         = {1,3,10},
						["oak-wood-only"]       = {1,3,10},
						["acacia-wood-only"]    = {1,3,10},
						["stone-axe"]           = {1,1,3},
						["wooden-axe"]          = {1,1,5},
						["stone-pickaxe"]       = {1,1,3},
						["wooden-pickaxe"]      = {1,1,5}
					}
				},
			},
			poolsDev = {
				{
					rolls = {1,1},
					items = {
						["stone-axe"]           = {1,1,1},
						["wooden-axe"]          = {1,1,3},
					}
				},
				{
					rolls = {1,1},
					items = {
						["stone-pickaxe"]       = {1,1,1},
						["wooden-pickaxe"]      = {1,1,3}
					}
				},
				{
					rolls = {3,3},
					items = {
						["apple"]               = {1,2,5},
						["bread"]               = {1,2,3},
						["raw-salmon"]          = {1,2,3},
					}
				},
				{
					rolls = {4,4},
					items = {
						["stick"]               = {1,12,10},
						["wood-planks"]         = {1,12,10},
						["oak-wood"]            = {1,3,10},
						["acacia-wood"]         = {1,3,10},
					}
				},
			}
		},
		["dungeon"] = { -- simple_dungeon.json
			header = "[[Mazmorra]]",
			link   = "[[Mazmorra]]",
			pools = {
				{
					rolls = {8,8},
					items = {
						["iron-ingot"]          = {1,4,10},
						["bread"]               = {1,1,10},
						["horse-armor-iron"]    = {1,1,5},
						["horse-armor-gold"]    = {1,1,2},
						["horse-armor-diamond"] = {1,1,1},
						["redstone"]            = {1,4,10},
						["golden-apple"]        = {1,1,1},
						["saddle"]              = {1,1,10},
						["wheat"]               = {1,4,10},
						["gunpowder"]           = {1,4,10},
						["string"]              = {1,4,10},
						["bucket"]              = {1,1,10},
						["disc-13"]             = {1,1,4},
						["disc-cat"]            = {1,1,4},
						["name-tag"]            = {1,1,10},
						["enchanted-book"]      = {1,1,1}
					}
				}
			},
			poolsDev = {
				{
					rolls = {1,3},
					items = {
						["saddle"]              = {1,1,20},
						["golden-apple"]        = {1,1,15},
						["notch-apple"]         = {1,1,2},
						["disc-13"]             = {1,1,15},
						["disc-cat"]            = {1,1,15},
						["name-tag"]            = {1,1,20},
						["horse-armor-gold"]    = {1,1,10},
						["horse-armor-iron"]    = {1,1,15},
						["horse-armor-diamond"] = {1,1,5},
						["enchanted-book-rnd"]  = {1,1,10},
					}
				},
				{
					rolls = {1,4},
					items = {
						["iron-ingot"]          = {1,4,10},
						["gold-ingot"]          = {1,4,5},
						["bread"]               = {1,1,20},
						["wheat"]               = {1,4,20},
						["bucket"]              = {1,1,10},
						["redstone"]            = {1,4,15},
						["coal"]                = {1,4,15},
						["melon-seeds"]         = {2,4,10},
						["pumpkin-seeds"]       = {2,4,10},
						["beetroot-seeds"]      = {2,4,10},
					}
				},
				{
					rolls = {3,3},
					items = {
						["bone"]                = {1,8,10},
						["gunpowder"]           = {1,8,10},
						["rotten-flesh"]        = {1,8,10},
						["string"]              = {1,8,10},
					}
				},
			}
		},
		["mineshaft"] = { -- abandoned_mineshaft.json
			header = "[[Mina]]",
			link   = "[[Mina abandonada]]",
			pools = {
				{
					rolls = {3,6},
					items = {
						["diamond"]             = {1,2,3},
						["iron-ingot"]          = {1,5,10},
						["gold-ingot"]          = {1,3,5},
						["bread"]               = {1,3,15},
						["iron-pickaxe"]        = {1,1,1},
						["horse-armor-iron"]    = {1,1,1},
						["redstone"]            = {4,9,5},
						["lapis-lazuli"]        = {4,9,5},
						["saddle"]              = {1,1,3},
						["enchanted-book"]      = {1,1,1},
						["coal"]                = {3,8,10},
						["rail"]                = {4,8,1},
						["melon-seeds"]         = {2,4,10},
						["pumpkin-seeds"]       = {2,4,10}
					}
				},
			},
			poolsDev = {
				{
					rolls = {1,1},
					items = {
						["golden-apple"]        = {1,1,20},
						["notch-apple"]         = {1,1,1},
						["name-tag"]            = {1,1,30},
						["enchanted-book-rnd"]  = {1,1,10},
						["iron-pickaxe"]        = {1,1,5},
						["empty"]				= {1,1,5},
					}
				},
				{
					rolls = {2,4},
					items = {
						["iron-ingot"]          = {1,5,10},
						["gold-ingot"]          = {1,3,5},
						["redstone"]            = {4,9,5},
						["lapis-lazuli"]        = {4,9,5},
						["diamond"]             = {1,2,3},
						["coal"]                = {3,8,10},
						["bread"]               = {1,3,15},
						["melon-seeds"]         = {2,4,10},
						["pumpkin-seeds"]       = {2,4,10},
						["beetroot-seeds"]      = {2,4,10},
					}
				},
				{
					rolls = {3,3},
					items = {
						["rail"]                = {4,8,20},
						["powered-rail"]        = {1,4,5},
						["detector-rail"]       = {1,4,5},
 						["activator-rail"]      = {1,4,5},
						["torch"]               = {1,16,15},
					}
				},
			}
		},
		["nether-fortress"] = { -- nether_bridge.json
			header = "[[Fortaleza del Inframundo|Fortaleza del]]<br>[[Fortaleza del Inframundo|Inframundo]]",
			link   = "[[Fortaleza del Inframundo]]",
			pools = {
				{
					rolls = {2,5},
					items = {
						["diamond"]             = {1,3,5},
						["iron-ingot"]          = {1,5,5},
						["gold-ingot"]          = {1,3,15},
						["obsidian"]            = {2,4,2},
						["horse-armor-iron"]    = {1,1,5},
						["horse-armor-gold"]    = {1,1,8},
						["horse-armor-diamond"] = {1,1,3},
						["saddle"]              = {1,1,10},
						["golden-sword"]        = {1,1,5},
						["golden-chestplate"]   = {1,1,5},
						["flint-and-steel"]     = {1,1,5},
						["nether-wart"]         = {3,7,5}
					}
				},
			},
			poolsDev = {
				{
					rolls = {2,4},
					items = {
						["diamond"]             = {1,3,5},
						["iron-ingot"]          = {1,5,5},
						["gold-ingot"]          = {1,3,15},
						["golden-sword"]        = {1,1,5},
						["golden-chestplate"]   = {1,1,5},
						["flint-and-steel"]     = {1,1,5},
						["nether-wart"]         = {3,7,5},
						["saddle"]              = {1,1,10},
						["horse-armor-gold"]    = {1,1,8},
						["horse-armor-iron"]    = {1,1,5},
						["horse-armor-diamond"] = {1,1,3},
						["obsidian"]            = {2,4,2},
					}
				},
			}
		},
		["desert-temple"] = { -- desert_pyramid.json
			header = "[[Templo del desierto]]",
			link   = "[[Templo del desierto]]",
			pools = {
				{
					rolls = {2,6},
					items = {
						["diamond"]             = {1,3,3},
						["iron-ingot"]          = {1,5,10},
						["gold-ingot"]          = {2,7,15},
						["emerald"]             = {1,3,2},
						["horse-armor-iron"]    = {1,1,1},
						["horse-armor-gold"]    = {1,1,1},
						["horse-armor-diamond"] = {1,1,1},
						["saddle"]              = {1,1,3},
						["enchanted-book"]      = {1,1,1},
						["bone"]                = {4,6,20},
						["rotten-flesh"]        = {3,7,16}
					}
				},
			},
			poolsDev = {
				{
					rolls = {2,4},
					items = {
						["diamond"]             = {1,3,5},
						["iron-ingot"]          = {1,5,15},
						["gold-ingot"]          = {2,7,15},
						["emerald"]             = {1,3,15},
						["bone"]                = {4,6,25},
						["spider-eye"]          = {1,3,25},
						["rotten-flesh"]        = {3,7,25},
						["saddle"]              = {1,1,20},
						["horse-armor-iron"]    = {1,1,15},
						["horse-armor-gold"]    = {1,1,10},
						["horse-armor-diamond"] = {1,1,5},
						["enchanted-book-rnd"]  = {1,1,20},
						["golden-apple"]        = {1,1,20},
						["notch-apple"]         = {1,1,2},
						["empty"]               = {1,1,15},
					}
				},
				{
					rolls = {4,4},
					items = {
						["bone"]                = {1,8,10},
						["gunpowder"]           = {1,8,10},
						["rotten-flesh"]        = {1,8,10},
						["string"]              = {1,8,10},
						["sand"]                = {1,8,10},
					}
				},
			}
		},
		["jungle-temple"] = { -- jungle-temple.json
			header = "[[Jungle temple]]",
			link   = "[[jungle temple]]",
			pools = {
				{
					rolls = {2,6},
					items = {
						["diamond"]             = {1,3,3},
 						["iron-ingot"]          = {1,5,10},
						["gold-ingot"]          = {2,7,15},
						["emerald"]             = {1,3,2},
						["horse-armor-iron"]    = {1,1,1},
						["horse-armor-gold"]    = {1,1,1},
						["horse-armor-diamond"] = {1,1,1},
						["saddle"]              = {1,1,3},
						["enchanted-book"]      = {1,1,1},
						["bone"]                = {4,6,20},
						["rotten-flesh"]        = {3,7,16}
					}
				},
			}
		},
		["end-city"] = { -- end_city_treasure.json
			header = "[[Ciudad del Fin]]",
			link   = "[[Ciudad del Fin]]",
			poolsDev = {
				{
					rolls = {2,6},
					items = {
						["diamond"]             = {2,7,5},
						["iron-ingot"]          = {4,8,10},
						["gold-ingot"]          = {2,7,15},
						["emerald"]             = {2,6,2},
						["beetroot-seeds"]      = {1,10,5},
						["saddle"]              = {1,1,3},
						["horse-armor-iron"]    = {1,1,1},
						["horse-armor-gold"]    = {1,1,1},
						["horse-armor-diamond"] = {1,1,1},
						["enchanted-diamond-sword"]      = {1,1,3},
						["enchanted-diamond-boots"]      = {1,1,3},
						["enchanted-diamond-chestplate"] = {1,1,3},
						["enchanted-diamond-leggings"]   = {1,1,3},
						["enchanted-diamond-helmet"]     = {1,1,3},
						["enchanted-diamond-pickaxe"]    = {1,1,3},
						["enchanted-diamond-shovel"]     = {1,1,3},
						["enchanted-iron-sword"]         = {1,1,3},
						["enchanted-iron-boots"]         = {1,1,3},
						["enchanted-iron-chestplate"]    = {1,1,3},
						["enchanted-iron-leggings"]      = {1,1,3},
						["enchanted-iron-helmet"]        = {1,1,3},
						["enchanted-iron-pickaxe"]       = {1,1,3},
						["enchanted-iron-shovel"]        = {1,1,3},
					}
				},
			}
		},
		["igloo"] = {
			header = "[[Iglú]]",
			link   = "[[Iglú]]",
			poolsDev = {
				{
					rolls = {2,8},
					items = {
						["apple"]               = {1,3,15},
						["coal"]                = {1,4,15},
						["gold-nugget"]         = {1,3,10},
						["stone-axe"]           = {1,1,2},
						["rotten-flesh"]        = {1,1,10},
						["emerald"]             = {1,1,1},
						["wheat"]               = {2,3,10}
					}
				},
				{
					rolls = {1,1},
					items = {
						["golden-apple"]        = {1,1,1},
					}
				},
			}
		},
	},

	-- these values are used:
	-- * in place of the keys, when the key is used as a parameter
	
	-- chest-param -> internally-valid-chest-param
	
	synonyms = {
		["desert"] = "desert-temple",
		["jungle"] = "jungle-temple",
		["nether"] = "nether-fortress",
		["fortress"] = "nether-fortress",
		["village"] = "village-blacksmith",
		["blacksmith"] = "village-blacksmith",
		["altar"] = "stronghold-altar",
		["storeroom"] = "stronghold-storeroom",
		["library"] = "stronghold-library"
	},

	-- these values are used:
	-- * in the header-description of a table showing only a single chest
	-- * if the key is not here, but it is a valid chest parameter,
	--   that header-description will default to use the key string from p.chests,
	--   e.g. "nether-fortress"
	
	-- chest-param -> description-string
	
	display_names = {
		["nether-fortress"] = "Nether fortress",
		["nether"] = "Nether fortress",
		["fortress"] = "Nether fortress",
		["desert"] = "desert temple",
		["jungle"] = "jungle temple",
		["desert-temple"] = "desert temple",
		["jungle-temple"] = "jungle temple"
	},
	
	-- these descriptions are used:
	-- * in column <abbr> titles,
	-- * and above the table when only a single column-type is chosen
	
	columns = {
		["stacksize"] = 'el tamaño de las pilas (o por número de objetos no apilables) de este objeto que se encuentran en este cofre.',
		["weight"] = 'la cantidad de este objeto en relación con otros objetos en el cofre.',
		["items"] = 'el número de objetos esperados por cada cofre, como promedio sobre un gran número de cofres.',
		["chance"] = 'las probabilidades de conseguir cualquiera de este material en un solo cofre.',
		["chests"] = 'el número de cofres esperados que buscar, para encontrar algo de este objeto.'
	},
	
	current_frame = nil
}

p.base = function( ... )

	p.current_frame = mw.getCurrentFrame()

	local args = { ... }
	if args[1] == p.current_frame then 
		args = require( 'Module:ProcessArgs' ).merge( true )
	else
		args = args[1]
	end
	
	-- transform args into usable list
	
	local chests, columns = q.massage_args( args )
	
	if #chests == 0 then
		return "<span style='font-style:italic; color:red;'>Module:LootChest: no valid arguments</span>"
	end

	q.fill_in_chest_derivative_data( chests )
	
	-- construct an ordered list dictating the order of the rows
	
	local ordered_item_rows, ordered_item_rows_dev

	local ret = {}
	if args.dev and args.dev ~= '0' then
		local ordered_item_rows = q.construct_ordered_item_rows( chests, 'Dev' )
		if q.tablelength( ordered_item_rows ) > 0 then
			table.insert( ret, q.print_table( chests, columns, ordered_item_rows, 'Dev' ) )
		end
	else
		local ordered_item_rows = q.construct_ordered_item_rows( chests, '' )
		local ordered_item_rows_dev = q.construct_ordered_item_rows( chests, 'Dev' )

		if q.tablelength( ordered_item_rows ) > 0 then
			table.insert( ret, q.print_table( chests, columns, ordered_item_rows, '' ) )
		end
		if q.tablelength( ordered_item_rows_dev ) > 0 and q.compare_tables( ordered_item_rows, ordered_item_rows_dev ) then
			table.insert( ret, p.current_frame:preprocess( p.dev ) .. q.lcfirst( q.print_table( chests, columns, ordered_item_rows_dev, 'Dev' ) ) )
		end
	end

	return table.concat( ret, '\n\n' )
end

p.doc = function()

	local valid_args = {}
	for chest_name, val in pairs(p.chests) do
		local synonyms = {}
		for syn, orig in pairs(p.synonyms) do
			if orig == chest_name then
				table.insert( synonyms, syn )
			end
		end
		if #synonyms > 0 then
			chest_name = chest_name .. " ( " .. table.concat( synonyms, ", " ) .. " )"
		end
		table.insert( valid_args, chest_name )
	end
	table.sort( valid_args )
	return table.concat( valid_args, ",\n<br>" )

end

p.doc2 = function()

	local valid_args = {}
	for column_name, val in pairs(p.columns) do
		table.insert( valid_args, column_name .. ": " .. val )
	end
	table.sort( valid_args )
	return table.concat( valid_args, ",\n<br>" )

end

p.doc3 = function()

	local valid_args = {}
	for item_name, val in pairs(p.items) do
		table.insert( valid_args, item_name )
	end
	table.sort( valid_args )
	return table.concat( valid_args, ", " )

end

p.base2 = function( ... )

	p.current_frame = mw.getCurrentFrame()

	local args = { ... }
	if args[1] == p.current_frame then 
		args = require( 'Module:ProcessArgs' ).merge( true )
	else
		args = args[1]
	end
	
	local itemname = args[1]
	
	if p.items[itemname] == nil then
		return '<span style="color:red;">unknown item "' .. itemname .. '"</span>'
	end
	
	local chances, devChances
	if args.dev and args.dev ~= '0' then
		chances = q.single_item_find_values( itemname, 'poolsDev' )
		devChances = {}
	else
		chances = q.single_item_find_values( itemname, 'pools' )
		devChances = q.single_item_find_values( itemname, 'poolsDev' )
	end
	
	local html = {}

	if q.tablelength( chances ) > 0 then
		table.insert( html, p.base2_sub( itemname, chances ) )
	end
	if q.tablelength( devChances ) > 0 and q.compare_tables( chances, devChances ) then
		table.insert( html, p.current_frame:preprocess( p.dev ) .. q.lcfirst( p.base2_sub( itemname, devChances ) ) )
	end

	return table.concat( html, ' ' )
end

p.base2_sub = function( itemname, chances )
	local html = {}
	local item_display_name = ''
	
	if p.items[itemname].plural ~= nil and p.items[itemname].plural ~= false then
		item_display_name = p.items[itemname].plural
	else
		if p.items[itemname].title ~= nil then
			item_display_name = p.items[itemname].title
		else
			item_display_name = string.gsub( itemname, '-', ' ' )
		end
		if p.items[itemname].plural == nil or p.items[itemname].plural ~= false then
			item_display_name = q.single_item_plural( item_display_name )
		end
	end
	
	item_display_name = q.capitalize( item_display_name )
	
	table.insert( html, item_display_name )
	table.insert( html, ' can be found ' )

	local html_stacks = {}
	local stack_sep = ', '
	local ns = q.tablelength( chances )
	local s = 0

	for stacksize, chest_details in pairs( chances ) do
		s = s + 1
	
		local html_per_stack = { 'in ' }
		local c = 0
		local nc = q.tablelength( chest_details )
		local sep = q.tern( nc > 2, ', ', ' ' )
		if nc > 2 and s ~= ns then
			stack_sep = '; '
		end
		for k, chest in pairs( chest_details ) do
			c = c + 1
			if c == nc and nc > 1 then
				table.insert( html_per_stack, 'and ' )
			end
			table.insert( html_per_stack, string.format("%.1f", chest.chance*100) )
			table.insert( html_per_stack, "% of " )
			if chest.chest_name == 'mineshaft' then
				table.insert( html_per_stack, ' [[Minecart with Chest|chest minecarts]] in ' )
				table.insert( html_per_stack, p.chests[chest.chest_name].link )
			else
				table.insert( html_per_stack, p.chests[chest.chest_name].link )
				table.insert( html_per_stack, ' chests' )
			end
			table.insert( html_per_stack, sep )
		end
		if nc > 2 then
			table.insert( html_per_stack, 'all ' )
		end
		table.insert( html_per_stack, 'in ' )
		if p.items[itemname].cannot_stack ~= nil then
			table.insert( html_per_stack, 'groups of ' )
		else
			table.insert( html_per_stack, 'stacks of ' )
		end
		table.insert( html_per_stack, stacksize )
	
		table.insert( html_stacks, table.concat( html_per_stack ) )
	end
	
	local stackwise_summaries = ''
	if #html_stacks == 1 then
		table.insert( html, html_stacks[1] )
	else
		for i = 1, #html_stacks - 1 do
			table.insert( html, html_stacks[ i ] )
			table.insert( html, stack_sep ) 
		end
		table.insert( html, 'and ' )
		table.insert( html, html_stacks[#html_stacks] )
	end
	
	table.insert( html, '.' )
	
	return table.concat( html )
	
end

p.base2_test = function()

	items = {}
	for item_name, v in pairs( p.items ) do
		table.insert( items, p.base2{ item_name } .. '\n\n' )
	end

	table.sort( items )
	
	return table.concat(items)
end

q = {

	tablelength = function(T)
		local count = 0
		for _ in pairs(T) do count = count + 1 end
		return count
	end,
	
	single_item_find_values = function( itemname, key )
	
		local chances = {}

		for chest_name, chest in pairs( p.chests ) do
			local poolchances = {}
			for k, pool in pairs( chest[key] or chest.pools or {} ) do
				local poolitem = pool.items[itemname]
				if poolitem ~= nil then
				
					local stacksize = poolitem[1]
					if poolitem[1] ~= poolitem[2] then
						stacksize = stacksize .. "–" .. poolitem[2]
					end
					
					local itemweight = poolitem[3]
					
					local pool_total_item_weight = 0
					for itemname, item in pairs(pool.items) do
						pool_total_item_weight = pool_total_item_weight + item[3]
					end
				
					local chance = p.calc_chance_any_of_this_item_per_pool( 
						pool.rolls[1], pool.rolls[2],
						itemweight, pool_total_item_weight )

					if poolchances[stacksize] == nil then
						poolchances[stacksize] = chance
					else
						poolchances[stacksize] = poolchances[stacksize] + (1 - poolchances[stacksize]) * chance
					end
				end
			end
			for stacksize, chance in pairs( poolchances ) do
				if chances[stacksize] == nil then
					chances[stacksize] = {}
				end
				table.insert( chances[stacksize], { ["chance"]=chance, ["chest_name"]=chest_name } )
			end
		end

		return chances
		
	end,
	
	single_item_plural = function( itemname )
	
		if string.sub( itemname, -2 ) == 'ss' 
			or string.sub( itemname, -2 ) == 'ch' 
			or string.sub( itemname, -2 ) == 'sh' 
			or string.sub( itemname, -1 ) == 's' then 
				return itemname .. 'es' 
		end
		
		return itemname .. 's'
	
	end,
	
	massage_args = function( args )

		-- find what columns to put
		
		local columns = {}
		
		for k, _arg in pairs(args) do
			if p.columns[_arg] ~= nil then
				columns[_arg] = true
			end
		end
		
		if q.tablelength(columns) == 0 then
			for column_name, v in pairs(p.columns) do
				columns[column_name] = true
			end
		end
		
		-- find what chests to show

		local chests = {}
		
		for k, _arg in pairs(args) do
			if p.chests[_arg] ~= nil then
				table.insert( chests, _arg )
			elseif p.synonyms[_arg] ~= nil then 
				table.insert( chests, p.synonyms[_arg] )
			end
			if p.display_names[_arg] ~= nil then
				local chestname = _arg
				if p.chests[chestname] == nil then 
					chestname = p.synonyms[_arg]
				end
				p.chests[chestname].display_name = p.display_names[_arg]
			end
		end
		
		if #chests == 0 then
			for chest_name, chest in pairs(p.chests) do
				table.insert( chests, chest_name )
			end
		end
		
		table.sort( chests )
		
		return chests, columns
		
	end,

	sort_items = function( e1, e2 )
		
		if e1.chanceany ~= e2.chanceany then return ( e1.chanceany > e2.chanceany ) end
		if e1.avgamount ~= e2.avgamount then return ( e1.avgamount > e2.avgamount ) end
		
		if e1.material == nil then
			
			e1.material = 0
			if string.find( e1.itemname, "leather" ) ~= nil then e1.material = 1 end
			if string.find( e1.itemname, "iron" ) ~= nil then e1.material = 2 end
			if string.find( e1.itemname, "gold" ) ~= nil then e1.material = 3 end
			if string.find( e1.itemname, "diamond" ) ~= nil then e1.material = 4 end
			e1.armor = 0
			if string.find( e1.itemname, "helmet" ) ~= nil or string.find( e1.itemname, "cap" ) ~= nil then e1.armor = 1 end
			if string.find( e1.itemname, "chestplate" ) ~= nil or string.find( e1.itemname, "tunic" ) ~= nil then e1.armor = 2 end
			if string.find( e1.itemname, "leggings" ) ~= nil or string.find( e1.itemname, "pants" ) ~= nil then e1.armor = 3 end
			if string.find( e1.itemname, "boots" ) ~= nil then e1.armor = 4 end
			
		end
		
		if e2.material == nil then
			
			e2.material = 0
			if string.find( e2.itemname, "leather" ) ~= nil then e2.material = 1 end
			if string.find( e2.itemname, "iron" ) ~= nil then e2.material = 2 end
			if string.find( e2.itemname, "gold" ) ~= nil then e2.material = 3 end
			if string.find( e2.itemname, "diamond" ) ~= nil then e2.material = 4 end
			e2.armor = 0
			if string.find( e2.itemname, "helmet" ) ~= nil or string.find( e2.itemname, "cap" ) ~= nil then e2.armor = 1 end
			if string.find( e2.itemname, "chestplate" ) ~= nil or string.find( e2.itemname, "tunic" ) ~= nil then e2.armor = 2 end
			if string.find( e2.itemname, "leggings" ) ~= nil or string.find( e2.itemname, "pants" ) ~= nil then e2.armor = 3 end
			if string.find( e2.itemname, "boots" ) ~= nil then e2.armor = 4 end
		
		end
		
		if e1.material ~= e2.material then return ( e1.material < e2.material ) end
		if e1.armor ~= e2.armor then return ( e1.armor < e2.armor ) end
		
		return ( e1.itemname < e2.itemname )
		
	end,
	
	fill_in_chest_derivative_data = function( chest_names )

		for k, chest_name in pairs(chest_names) do
			local chest = p.chests[chest_name]
			if chest == nil then break end

			chest.allRolls = {}
			chest.itemData = {}
			for k, pool in pairs( chest.pools or {} ) do
				table.insert( chest.allRolls, q.tern( pool.rolls[1] == pool.rolls[2], pool.rolls[1], pool.rolls[1]..'–'..pool.rolls[2] ) )

				local total_weight = 0
				for itemname, item in pairs(pool.items) do
					total_weight = total_weight + item[3]
				end
				pool.totalweight = total_weight

				q.fill_in_chest_item_details( chest.itemData, pool, #chest.allRolls )
			end

			chest.allRollsDev = {}
			chest.itemDataDev = {}
			for k, pool in pairs( chest.poolsDev or chest.pools or {} ) do
				table.insert( chest.allRollsDev, q.tern( pool.rolls[1] == pool.rolls[2], pool.rolls[1], pool.rolls[1]..'–'..pool.rolls[2] ) )

				local total_weight = 0
				for itemname, item in pairs(pool.items) do
					total_weight = total_weight + item[3]
				end
				pool.totalweight = total_weight

				q.fill_in_chest_item_details( chest.itemDataDev, pool, #chest.allRollsDev )
			end
		end
	end,

	fill_in_chest_item_details = function( data, pool, ct )
		for item_name, item in pairs(pool.items) do
			if p.items[item_name] then
				local min_stacksize = item[1]
				local max_stacksize = item[2]
				local min_pool_rolls = pool.rolls[1]
				local max_pool_rolls = pool.rolls[2]
				local item_weight = item[3]
			
				if data[item_name] == nil then
					data[item_name] = {
						avgamount = 0,
						chanceany = 0,
						itemname = item_name,
						sortsize = {},
						sortweight = {},
						sizes = {},
						weights = {},
					}
					for i = 1, ct-1 do
						data[item_name].sortsize[i] = 0
						data[item_name].sortweight[i] = 0
						data[item_name].sizes[i] = '—'
						data[item_name].weights[i] = '—'
					end
				end

				data[item_name].avgamount = data[item_name].avgamount + p.calc_average_amount_this_item_per_pool( 
					min_stacksize, max_stacksize, 
					min_pool_rolls, max_pool_rolls, 
					item_weight, pool.totalweight )
					
				data[item_name].chanceany = data[item_name].chanceany + (1 - data[item_name].chanceany) * p.calc_chance_any_of_this_item_per_pool(
					min_pool_rolls, max_pool_rolls, 
					item_weight, pool.totalweight )

				data[item_name].sortsize[ct] = ( min_stacksize + max_stacksize ) / 2
				data[item_name].sortweight[ct] = item_weight;
				data[item_name].sizes[ct] = q.tern( min_stacksize == max_stacksize, min_stacksize, min_stacksize .. '–' .. max_stacksize )
				data[item_name].weights[ct] = p.current_frame:expandTemplate{ title = 'frac', args = { item_weight, pool.totalweight } }
			end
		end

		for item_name, d in pairs(data) do
			if not d.sizes[ct] then
				d.sortsize[ct] = 0
				d.sortweight[ct] = 0
				d.sizes[ct] = '—'
				d.weights[ct] = '—'
			end
		end
	end,

	construct_ordered_items_from_first_chest = function( chest_names, suffix )
		local items_from_first_table = {}
		local item_chests = {}
		local item_names_ordered = {}
		for item_name, item in pairs( p.chests[chest_names[1]]['itemData'..suffix] ) do
			table.insert( items_from_first_table, item )
		end
		
		table.sort( items_from_first_table, q.sort_items )
		
		for k, item in pairs( items_from_first_table ) do
			table.insert( item_names_ordered, item.itemname )
			item_chests[item.itemname] = true
		end
		
		return item_names_ordered, item_chests
	end,

	get_ordered_items_from_other_chests = function( chest_names, item_chests, suffix )
		local items_not_from_first_table = {}
		
		for chest_idx = 2, #chest_names do
			for item_name, item in pairs( p.chests[chest_names[chest_idx]]['itemData'..suffix] ) do
				if item_chests[item_name] == nil then
					p.items[item_name].itemname = item_name
					table.insert( items_not_from_first_table, p.chests[chest_names[chest_idx]]['itemData'..suffix][item_name] )
					item_chests[item_name] = true
				end
			end
		end

		table.sort( items_not_from_first_table, q.sort_items )
		
		return items_not_from_first_table
	end,

	add_other_items_to_first_list = function( chest_names, item_names_ordered, item_chests, items_not_from_first_table )
		for k, item in pairs( items_not_from_first_table ) do
			table.insert( item_names_ordered, item.itemname )
		end
		
		return item_names_ordered
	end,

	set_up_ordered_item_rows = function( chest_names, item_names_ordered, suffix )
		for k, itemname in pairs(item_names_ordered) do
			item_names_ordered[k] = {itemname}
			for chest_idx = 1, #chest_names do
				local item_data = p.chests[chest_names[chest_idx]]['itemData'..suffix][itemname]
				if item_data == nil then
					table.insert( item_names_ordered[k], false )
				else
					table.insert( item_names_ordered[k], item_data )
				end
			end
		end

		return item_names_ordered
	end,

	construct_ordered_item_rows = function( chest_names, suffix )
		-- for the first chest, sort its by chance desc, then by avg amount desc, then alphabetically asc
		local item_names_ordered, item_chests = q.construct_ordered_items_from_first_chest( chest_names, suffix )
		
		if #chest_names > 1 then
			-- after that, sort all the remaining items in list order
			local items_not_from_first_table = q.get_ordered_items_from_other_chests( chest_names, item_chests, suffix )
			item_names_ordered = q.add_other_items_to_first_list( chest_names, item_names_ordered, item_chests, items_not_from_first_table )
		end

		-- set up item_names_ordered so that each is a row, representing chest values
		item_names_ordered = q.set_up_ordered_item_rows( chest_names, item_names_ordered, suffix )
		
		return item_names_ordered
	end,

	print_table = function( chest_names, columns, ordered_item_rows, suffix )

		local html = {}
		
		local use_roll_row = false
		local use_superheader = false
		local superheader_sizes = {}
		for i = 1, #chest_names do
			sh = p.chests[chest_names[i]].superheader
			if sh ~= nil then
				if superheader_sizes[sh] == nil then
					superheader_sizes[sh] = 0
				end
				superheader_sizes[sh] = superheader_sizes[sh] + 1
				use_superheader = true
			end
			local allRolls = p.chests[chest_names[i]]['allRolls'..suffix]
			if #allRolls > 1 then
				use_roll_row = true
			end
		end
		if columns['stacksize'] == nil and columns['weight'] == nil then
			use_roll_row = false
		end
		
		local rowspan = ( 1 + q.tern( #chest_names > 1, 1, 0 ) + q.tern( use_superheader, 1, 0 ) )
		local hide_col_description = rowspan > 1 and q.tablelength(columns) == 1
		if use_roll_row then
			rowspan = rowspan + 1
		end
		
		if q.tablelength(columns) == 1 then
			for column_name, v in pairs(columns) do
				table.insert( html, "Los valores representan " )
				table.insert( html, p.columns[column_name] )
				table.insert( html, "\n" )
			end
		end

		if #chest_names == 1 then
		
			if q.tablelength(columns) == 1 then
				table.insert( html, "<br>" )
			end
		
			local chest_name = chest_names[1]
			local allRolls = p.chests[chest_name]['allRolls'..suffix]

			local display_name = p.chests[chest_name].display_name

			chest_name = chest_name:gsub( "-", " " )
			
			table.insert( html, "Each " )
			table.insert( html, display_name or chest_name )
			table.insert( html, " chest contains " )
			if #allRolls == 1 then
				table.insert( html, allRolls[1] )
			else
				table.insert( html, #allRolls )
				table.insert( html, ' groups of ' )
				local s = q.tern( #allRolls > 2, ', ', ' ' )
				for i = 1, #allRolls-1 do
					table.insert( html, allRolls[i] )
					table.insert( html, s )
				end
				table.insert( html, 'and ' )
				table.insert( html, allRolls[#allRolls] )
			end
			table.insert( html, " item stacks, with the following distribution: \n" )
		end
		
		table.insert( html, '<div style="overflow:auto">\n' )
		table.insert( html, "<table class='wikitable sortable jquery-tablesorter'>\n" )
		table.insert( html, "<tr>\n" )
		table.insert( html, "<th rowspan=" )
		table.insert( html, ( rowspan - q.tern( hide_col_description, 1, 0 ) ) )
		table.insert( html, "></th>\n" )
		
		local superheader_cols_used = {}
		
		if #chest_names > 1 then
			local row1, row2 = {}, {}

			for i = 1, #chest_names do
				local allRolls = p.chests[chest_names[i]]['allRolls'..suffix]
				local colspan = q.tablelength(columns)
				local allRollsSpan = #allRolls == 0 and 1 or #allRolls
				if columns['stacksize'] ~= nil then
					colspan = colspan - 1 + allRollsSpan
				end
				if columns['weight'] ~= nil then
					colspan = colspan - 1 + allRollsSpan
				end
				local row = row1

				rowspan = 1
				if use_superheader then
					sh = p.chests[chest_names[i]].superheader
					if sh ~= nil then
						if superheader_cols_used[sh] == nil then
							table.insert( row, "<th colspan=" )
							table.insert( row, ( colspan * superheader_sizes[sh] ) )
							table.insert( row, ">" )
							table.insert( row, sh )
							table.insert( row, "</th>\n" )
							superheader_cols_used[sh] = 0
						end
						row = row2
					else
						rowspan = rowspan + 1
					end
				end
				if use_roll_row and hide_col_description and #allRolls < 2 then
					rowspan = rowspan + 1
				end

				table.insert( row, "<th colspan=" )
				table.insert( row, colspan )
				if rowspan > 1 then
					table.insert( row, " rowspan=" )
					table.insert( row, rowspan )
				end
				table.insert( row, ">" )
				table.insert( row, p.chests[ chest_names[i] ].header )
				if #allRolls > 0 then
					table.insert( row, ' <br><span style="font-weight:normal; font-style:italic; font-size:11px;">(' )
					if #allRolls == 1 then
						table.insert( row, allRolls[1] )
					else
						local s = q.tern( #allRolls > 2, ', ', ' ' )
						for i = 1, #allRolls-1 do
							table.insert( row, allRolls[i] )
							table.insert( row, s )
						end
						table.insert( row, 'and ' )
						table.insert( row, allRolls[#allRolls] )
					end
					table.insert( row, ' stacks)</span>' )
				end
				table.insert( row, "</th>\n" )
			end
			
			table.insert( html, table.concat( row1 ) )
			table.insert( html, "</tr><tr>\n" )
			if #row2 then
				table.insert( html, table.concat( row2 ) )
				table.insert( html, "</tr><tr>\n" )
			end
		end

		if not hide_col_description then
			local headersort_th_open
			if use_roll_row then
				headersort_th_open = "<th rowspan='2' class='headersort' role='columnheader button' data-sort-type='number'> <abbr title='"
			else
				headersort_th_open = "<th class='headersort' role='columnheader button' data-sort-type='number'> <abbr title='"
			end
			for i = 1, #chest_names do
				local allRolls = p.chests[chest_names[i]]['allRolls'..suffix]
				local allRollsSpan = #allRolls == 0 and 1 or #allRolls
				local headersort_th_colspan_open
				if #allRolls > 1 then
					headersort_th_colspan_open = "<th colspan='" .. allRollsSpan .. "' role='columnheader'> <abbr title='"
				else
					headersort_th_colspan_open = headersort_th_open
				end

				if columns['stacksize'] ~= nil then
					table.insert( html, headersort_th_colspan_open )
					table.insert( html, p.columns['stacksize'] )
					table.insert( html, "'> Stack Size </abbr></th>\n" )
				end
				if columns['weight'] ~= nil then
					table.insert( html, headersort_th_colspan_open )
					table.insert( html, p.columns['weight'] )
					table.insert( html, "'> Weight" )
					table.insert( html, "</abbr></th>\n" )
				end
				if columns['items'] ~= nil then
					table.insert( html, headersort_th_open )
					table.insert( html, p.columns['items'] )
					table.insert( html, "'> # Items </abbr></th>\n" )
				end
				if columns['chance'] ~= nil then
					table.insert( html, headersort_th_open )
					table.insert( html, p.columns['chance'] )
					table.insert( html, "'> Chance </abbr></th>\n" )
				end
				if columns['chests'] ~= nil then
					table.insert( html, headersort_th_open )
					table.insert( html, p.columns['chests'] )
					table.insert( html, "'> # Chests </abbr></th>\n" )
				end
			end
			table.insert( html, "</tr><tr>\n" )
		end
		
		if use_roll_row then
			local rowcols = ( columns['stacksize'] ~= nil and 1 or 0 ) + ( columns['weight'] ~= nil and 1 or 0 )
			for i = 1, #chest_names do
				local allRolls = p.chests[chest_names[i]]['allRolls'..suffix]
				if #allRolls > 1 then
					for j = 1, rowcols do
						for k = 1, #allRolls do
							table.insert( html, "<th class='headersort' role='columnheader button' data-sort-type='number' style='font-weight:normal'>" )
							table.insert( html, allRolls[k] )
							table.insert( html, "×</th>\n" )
						end
					end
				end
			end
			table.insert( html, "</tr><tr>\n" )
		end

		for i = 1, #ordered_item_rows do
			if type( ordered_item_rows[i] ) == "table" then
				for j = 1, #ordered_item_rows[i] do

					local chest_item = ordered_item_rows[i][j]
					
					if type( chest_item ) == "table" then
					
						local avg_amount = string.format("%.3f", chest_item.avgamount)
						local chance_any = string.format("%.1f", chest_item.chanceany*100) .. "%"
						local num_chests = string.format("%.1f", 1/chest_item.chanceany)
						
						table.insert( html, "\n" )
						if columns['stacksize'] ~= nil then
							for k = 1, #chest_item.sizes do
								table.insert( html, "<td style='text-align:center;' data-sort-value='" )
								table.insert( html, chest_item.sortsize[k] )
								table.insert( html, "'>" )
								table.insert( html, chest_item.sizes[k] )
								table.insert( html, "</td>" )
							end
						end
						if columns['weight'] ~= nil then
							for k = 1, #chest_item.sizes do
								table.insert( html, "<td style='text-align:center;' data-sort-value='" )
								table.insert( html, chest_item.sortweight[k] )
								table.insert( html, "'>" )
								table.insert( html, chest_item.weights[k] )
								table.insert( html, "</td>" )
							end
						end
						if columns['items'] ~= nil then
							table.insert( html, "<td style='text-align:center;'>" )
							table.insert( html, avg_amount )
							table.insert( html, "</td>" )
						end
						if columns['chance'] ~= nil then
							table.insert( html, "<td style='text-align:right;'>" )
							table.insert( html, chance_any )
							table.insert( html, "</td>" )
						end
						if columns['chests'] ~= nil then
							table.insert( html, "<td style='text-align:right;'>" )
							table.insert( html, num_chests )
							table.insert( html, "</td>" )
						end
							
					elseif type( chest_item ) == "boolean" then
						local allRolls = p.chests[chest_names[j-1]]['allRolls'..suffix]
						local allRollsSpan = #allRolls == 0 and 1 or #allRolls

						table.insert( html, "\n" )
						if columns['stacksize'] ~= nil then
							for k = 1, allRollsSpan do
								table.insert( html, "<td data-sort-value='0' style='text-align:center;'>—</td>" )
							end
						end
						if columns['weight'] ~= nil then
							for k = 1, allRollsSpan do
								table.insert( html, "<td data-sort-value='0' style='text-align:center;'>—</td>" )
							end
						end
						if columns['items'] ~= nil then
							table.insert( html, "<td data-sort-value='0' style='text-align:center;'>—</td>" )
						end
						if columns['chance'] ~= nil then
							table.insert( html, "<td data-sort-value='0' style='text-align:right;'>—</td>" )
						end
						if columns['chests'] ~= nil then
							table.insert( html, "<td data-sort-value='9e99' style='text-align:right;'>—</td>" )
						end
					else
						if i > 1 then
							table.insert( html, "</tr><tr>" )
						end
						
						local item = p.items[chest_item]
						
						local s = require( 'Module:Sprite' )
						table.insert( html, "\n<td>" )
						local image, spriteCat = s.link{ 
							id=item.id or chest_item, 
							link=item.link or string.gsub(chest_item,'-',' '), 
							text=item.title or q.titlecase(string.gsub(chest_item,'-',' ')), 
							settings= q.tern( item[1] == 'item', 'ItemSprite', 'BlockSprite' )
						}
						table.insert( html, image )
						table.insert( html, spriteCat )
						if item.note and p.notes[item.note] then
							table.insert( html, p.current_frame:preprocess( p.notes[item.note] ) )
						end
						table.insert( html, "</td>" )
					end
					
					if j == #ordered_item_rows[i] then
						table.insert( html, "</tr>" )
					end
					
				end
				table.insert( html, "\n" )
			end
		end
		
		table.insert( html, "</table></div>" )
		
		return table.concat( html )
		
	end,
	
	titlecase = function( str )
		local buf = {}
		for word in string.gfind(str, "%S+") do
			if word == "and" then
				table.insert( buf, word )
			else
				local first, rest = string.sub( word, 1, 1 ), string.sub( word, 2 )
				table.insert( buf, string.upper(first) .. string.lower(rest) )
			end
		end    
		return table.concat( buf, " " )
	end,
	
	capitalize = function( str )
		return ( string.lower(str):gsub( "^%l", string.upper ) )
	end,

	lcfirst = function( str )
		return ( string.gsub( str, "^%u", string.lower ) )
	end,
	
	tern = function( cond , T , F )
		if cond then return T else return F end
	end,

	compare_tables = function( a, b )
		local seen = {}
		for k, v in pairs( a ) do
			if type( v ) ~= type( b[k] ) then
				return true
			end
			if v ~= b[k] then
				return true
			end
			if type( v ) == 'table' and q.compare_tables( v, b[k] ) then
				return true
			end
			seen[k] = true
		end
		for k, v in pairs( b ) do
			if not seen[k] then
				return true
			end
		end
		return false
	end,
}

string.lpad = function(str, len, char)
	if char == nil then char = ' ' end
	return string.rep(char, len - #(''..str)) .. str
end

return p