local String = require("../../utils/string")

local types = require("../../utils/result_option_conv")
local Option = types.Option
type Option<T> = types.Option<T>

local function charWordSep(char: string)
	return char == " " or char == "-" or char == "_"
end

return function<T>(str: string, substrings: { [T]: { string } }, fullWords: { [T]: { string } }): Option<T>
	local lowercased = string.lower(str)

	-- Look for substring matches
	for item: T, keywords in substrings do
		for _, keyword in keywords do
			if string.find(lowercased, keyword) then
				return Option.Some(item) :: Option<T>
			end
		end
	end

	-- If no substring matches found, look for a full word as a component
	local components = String.splitAtChar(lowercased, charWordSep)
	for _, component in components do
		for item, keywords in fullWords do
			if table.find(keywords, component) then
				return Option.Some(item) :: Option<T>
			end
		end
	end

	return Option.None :: Option<T>
end