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local p = {}

local data = mw.loadJsonData("Data:ItemData.json")
local ability_data = mw.loadJsonData("Data:AbilityCards.json")

--------------------------------------------------
-- Constants
--------------------------------------------------

-- Desired type order
local TYPE_ORDER = {
	Weapon = 1,
	Armor = 2, -- Vitality
	Tech = 3   -- Spirit
}

--------------------------------------------------
-- Helpers
--------------------------------------------------

local function is_enabled(item)
	return item
		and item["Name"] ~= nil
		and (item["IsDisabled"] == false or item["IsDisabled"] == nil)
end

-- Returns numeric cost or nil if invalid
local function get_cost(item)
	local cost = tonumber(item["Cost"])
	if cost == nil then
		return nil
	end
	return cost
end

local function get_type_rank(item)
	return TYPE_ORDER[item["Slot"]] or math.huge
end

--------------------------------------------------
-- Core logic
--------------------------------------------------

local function get_sorted_items()
	local items = {}

	for _, item in pairs(data) do
		-- Exclude items with null / missing / non-numeric cost
		local cost = get_cost(item)

		if is_enabled(item) and cost ~= nil then
			table.insert(items, item)
		end
	end

	table.sort(items, function(a, b)
		-- 1. Sort by type
		local type_a = get_type_rank(a)
		local type_b = get_type_rank(b)
		if type_a ~= type_b then
			return type_a < type_b
		end

		-- 2. Sort by cost (low → high)
		local cost_a = get_cost(a)
		local cost_b = get_cost(b)
		if cost_a ~= cost_b then
			return cost_a < cost_b
		end

		-- 3. Stable fallback: name
		return a["Name"] < b["Name"]
	end)

	return items
end

--------------------------------------------------
-- Public (module-level) access
--------------------------------------------------

function p._get_enabled_items_sorted()
	return get_sorted_items()
end

function p._get_enabled_item_names_sorted()
	local items = get_sorted_items()
	local names = {}

	for _, item in ipairs(items) do
		table.insert(names, item["Name"])
	end

	return names
end

--------------------------------------------------
-- Abilities
--------------------------------------------------

local function get_all_abilities()
	local abilities = {}

	for _, hero in pairs(ability_data) do
		if type(hero) == "table" then
			for key, ability in pairs(hero) do
				if tonumber(key) ~= nil
					and type(ability) == "table"
					and ability["Name"] ~= nil
				then
					table.insert(abilities, {
						Index = tonumber(key),
						Name = ability["Name"]
					})
				end
			end
		end
	end

	return abilities
end

local function get_formatted_abilities()
	local abilities = get_all_abilities()
	local output = {}

	for _, ability in ipairs(abilities) do
		table.insert(output, "{{AbilityIcon|" .. ability["Name"] .. "}}")
	end

	return output
end

--------------------------------------------------
-- Invoke access points
--------------------------------------------------

-- {{#invoke:Monster Domosed|get_list}}
function p.get_list(frame)
	return table.concat(p._get_enabled_item_names_sorted(), "\n")
end

-- {{#invoke:Monster Domosed|get_csv}}
function p.get_csv(frame)
	return table.concat(p._get_enabled_item_names_sorted(), ",")
end

-- {{#invoke:Monster Domosed|get_count}}
function p.get_count(frame)
	return tostring(#p._get_enabled_item_names_sorted())
end

-- {{#invoke:Monster Domosed|get_abilities}}
function p.get_abilities(frame)
	return table.concat(get_formatted_abilities(), "\n")
end

-- {{#invoke:Monster Domosed|get_abilities_csv}}
function p.get_abilities_csv(frame)
	return table.concat(get_formatted_abilities(), ",")
end

-- {{#invoke:Monster Domosed|get_ability_count}}
function p.get_ability_count(frame)
	return tostring(#get_all_abilities())
end

return p