local export = {}

local ipa = require("Module:IPA")
local lang = require("Module:languages").getByCode("ka")

local gsub = mw.ustring.gsub
local lower = mw.ustring.lower

local mapping = {
	 = "a",  = "b",  = "ɡ",  = "d",
	 = "e",  = "v",  = "z",  = "tʰ",
	 = "i",  = "kʼ",  = "l",  = "m",
	 = "n",  = "o",  = "pʼ",  = "ʒ",
	 = "ɾ",  = "s",  = "tʼ",  = "u",
	 = "pʰ",  = "kʰ",  = "ʁ",  = "χʼ",
	 = "ʃ",  = "t͡ʃʰ",  = "t͡sʰ",  = "d͡z",
	 = "t͡sʼ",  = "t͡ʃʼ",  = "χ",  = "d͡ʒ",
	 = "h",
	 = "f" -- special character
}

function export.pronunciation(word)
	-- make text lowercase
	word = lower(word)

	require("Module:script utilities").checkScript(word, "Geor")

	-- /v/ is labialised to the previous consonant
	word = gsub(word, "()ვ", "%1ʷ")

	-- /v/ is devoiced before a devoiced consonant
	word = gsub(word, "ვ()", "f%1")

	-- /l/ is velarised before a back vowel
	word = gsub(word, "ლ()", "ɫ%1")

	-- /n/ is velarised before a velar consonant
	word = gsub(word, "ნ()", "ŋ%1")

	-- word-initial /b, d, ɡ/ are devoiced
	local bdg_initial = {  = "b̥",  = "d̥",  = "ɡ̊" }
	word = gsub(word, "^()", bdg_initial)
	word = gsub(word, "(%s)()", function(s, c) return s .. bdg_initial end)

	-- word-final /b, d, ɡ/ are devoiced and aspirated
	local bdg_final = {  = "ფ",  = "თ",  = "ქ" }
	word = gsub(word, "()$", bdg_final)
	word = gsub(word, "()(%s)", function(c, s) return bdg_final .. s end)

	word = gsub(word, "%p", "")
	word = gsub(word, ".", mapping)

	return word
end

function export.show(frame)
	local args = frame:getParent().args
	local pagetitle = mw.title.getCurrentTitle().text

	local p, results = {}, {}

	if args then
		for _, v in ipairs(args) do
			if v == "+" then v = pagetitle end
			table.insert(p, (v ~= "") and v or nil)
		end
	else
		if mw.title.getCurrentTitle().nsText == "Template" then
			p = {"ქართული ენა"}
		else p = { pagetitle } end
	end

	local has_f = false

	for input_index, word in ipairs(p) do
		-- check for character ჶ /f/
		if mw.ustring.find(word, "ჶ") then
			has_f = true
		end

		local phon = export.pronunciation(word)

		table.insert(results, { pron = "" })

		local qual = args
		if qual then
			results.qualifiers = { qual }
		end

	end

	local ret = ipa.format_IPA_full { lang = lang, items = results }

	if has_f then
		ret = ret .. require("Module:utilities").format_categories("Georgian terms with /f/", lang)
	end

	return ret
end

return export