Module:Smyth

export = {}

data = {
	["Smyth"] = {
		["path"] = "1999.04.0007"
	}
}

local find, match, gmatch = mw.ustring.find, mw.ustring.match, mw.ustring.gmatch

local function makeURL(resourceCode, part, code)
	code = mw.uri.encode(code, "PATH")
	return "http://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:" .. path .. ":" .. part .. "=" .. code
end

function Smyth(section, part)
	if not part then
		part = "smythp"
	end
	SmythData = data.Smyth
	path = SmythData.path
	local Part, url
	if section == "" or section == nil then
		url, Part = "No number provided", "No number provided"
	else
		sectionNumber = tonumber(section)
		if sectionNumber == nil then
			Part = ""
		else
			if sectionNumber < 189 then
				Part = "Part I: Letters, Sounds, Syllables, Accent"
			elseif sectionNumber < 822 then
				Part = "Part II: Inflection"
			elseif sectionNumber < 900 then
				Part = "Part III: Formation of Words"
			elseif sectionNumber < 3049 then
				Part = "Part IV: Syntax"
			else
				error("The largest valid section number is 3048")
			end
		end
		url = makeURL(path, part, section)
	end
	return { url = url, Part = Part }
end

function export.SmythSection(frame)
	local sectionParameter = frame.args[1]
	local output, sign = "", ""
	local sections, separators = {}, {}
	local part = frame.args[2]
	if sectionParameter then
		n = 1
		if find(sectionParameter, "[^%d%s]") then
			for number, separator in gmatch(sectionParameter, "(%d* ?%u?%.?[%l%d]?)(%p?[^%d]*)") do
				if number == "" or number == nil then
					sections[n] = ""
				else
					sections[n] = number
				end
				if separator == "" or separator == nil then
					separators[n] = ""
				else
					separators[n] = separator
				end
				if sections[n] == "" and separators[n] == "" then
					break
				end
				n = n + 1
			end
		else
			sections[1], separators[1] = match(sectionParameter, "(%d*)"), ""
		end
	else
		error("SmythSection wants input in the first parameter")
	end
	if #sections == nil or #sections == "" then
		error("No numbers in the text provided to SmythSection")
	elseif sections[2] == "" then
		sign = "§"
	else
		sign = "§§"
	end
	for i = 1, #sections do
		if sections[i] == "" then
			break
		else
			local sectionPath = string.gsub(sections[i], "%.%d", "")
			output = output .. "[" .. Smyth(sectionPath).url
			if i == 1 then
				output = output .. " " .. sign
			end
			output = output .. " " .. sections[i] .. "]" ..  separators[i]
		end
	end
	return output
end

function export.SmythPart(frame)
	local sectionParameter = frame.args[1]
	local section = match(sectionParameter, "(%d+)")
	return Smyth(section).Part
end

return export