Module:anui-pron

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local sub = mw.ustring.sub
local find = mw.ustring.find
local match = mw.ustring.match
local gmatch = mw.ustring.gmatch
local gsub = mw.ustring.gsub
local u = mw.ustring.char
local split = mw.text.split
local gsplit = mw.text.gsplit

-- To avoid weird annoying cursor behavior
local TILDE, NASAL = u(0x0303), u(0x0303) -- COMBINING TILDE ̃◌
local TILDEBELOW, CREAKY = u(0x0330), u(0x0330) -- COMBINING TILDE BELOW ̰◌
local GRAVE = u(0x0300) -- COMBINING GRAVE ACCENT ̀◌
local HIGHFALL = "˥˦"
local SYLLABIC = u(0x0329) -- COMBINING VERTICAL LINE BELOW ̩◌
local SYLLABICA = u(0x030D) -- COMBINING VERTICAL LINE ABOVE ̍◌
local INTERDENTAL = u(0x032A) .. u(0x0346) -- COMBINING BRIDGE BELOW AND ABOVE ̪͆◌
local VOICELESS = u(0x0325) -- COMBINING RING BELOW ̥◌

local back_vowel = "uɯɔɑ"
local front_vowel = "iea"
local vowel = "[" .. back_vowel .. front_vowel .. "]"
local oral_to_nasal = {["a"] = "ã", ["i"] = "ĩ", ["ɔ"] = "ṍ", ["u"] = "ᴍ"} -- ṍ = ɔ̃
local nasal_to_oral = {["ã"] = "a" .. NASAL, ["ĩ"] = "i" .. NASAL, ["ṍ"] = "ɔ" .. NASAL}
local modal_to_glottal = {["a"] = "à", ["e"] = "è", ["i"] = "ì", ["ɔ"] = "ò", ["u"] = "ù"}
local glottal_to_modal = {["à"] = "a" .. CREAKY, ["è"] = "e" .. CREAKY, ["ì"] = "i" .. CREAKY, ["ò"] = "ɔ" .. CREAKY, ["ù"] = "u" .. CREAKY}
local nasalized = "[ãĩṍᴍ]"
local glottalic = "[àèìòù]"

local function same(foo, bar)
	foo, bar = mw.ustring.toNFD(foo), mw.ustring.toNFD(bar) -- decompose diacritics
	foo, bar = match(foo, "^."), match(bar, "^.") -- sort out the letter
	return foo == bar and true or false
end

local export = {}

local rules = {
	{"ʇ", "ǀ"}, {"õ", "ṍ"}, {"o", "ɔ"}, {"ṭ", "ʈ"}, {"j", "ɟ"}, {"ñ", "ɲ"},
	{"([ḛḭṵaɔ]" .. TILDEBELOW .. "?)", {["ḛ"] = "è", ["ḭ"] = "ì", ["ṵ"] = "ù", ["a" .. TILDEBELOW] = "à", ["ɔ" .. TILDEBELOW] = "ò"}},
	{"([uùm]ʼ?)m", "%1ᴍ"}, {"m(ʼᴍ)", "ᴍ%1"}, -- tell apart between regular and syllabic <m>
	{"(" .. vowel .. ")(".. vowel .. ")", function(s1, s2) return same(s1, s2) and s1 .. "ː˧" or s1 .. s2 .. "˧" end},
	{"(" .. vowel .. ")(" .. nasalized .. ")",
		function(s1, s2)
			return same(s1, s2) and s2 .. "ː" .. HIGHFALL or oral_to_nasal[s1] .. s2 .. HIGHFALL
		end
	},
	{"(" .. glottalic .. ")([" .. front_vowel .. "])",
		function(s1, s2)
			return same(s1, s2) and s1 .. "ː˦" or modal_to_oral[s1] .. modal_to_oral[s2] .. "˦"
		end
	},
	{"(" .. glottalic .. ")([" .. back_vowel .. "])",
		function(s1, s2)
			return same(s1, s2) and s1 .. "ː˨" or modal_to_oral[s1] .. modal_to_oral[s2] .. "˨"
		end
	},
	{"(" .. glottalic .. ")ʼ([" .. front_vowel .. "])", "%1ʔ%2˦"}, {"(" .. glottalic .. ")ʼ([" .. back_vowel .. "])", "%1ʔ%2˨"},
	{"(" .. glottalic .. ")ʼ(" .. nasalized .. ")", function(s1, s2) return s1 .. NASAL .. "ʔ" .. s2 .. HIGHFALL end},
	
	
	{"ᴍᴍ", "m" .. SYLLABIC .. "ː"}, {"ùᴍ", "m" .. CREAKY .. SYLLABICA .. "ː˧"},
	{"ᴍʼᴍ", "m" .. SYLLABICA .. CREAKY .. "ʔm" .. SYLLABIC .. "˧"}, 
	{"ṍ", "ɔ" .. NASAL}, {"(" .. glottalic .. ")", function(s1) return glottal_to_modal[s1] end},
}

function export.crux(term)
	term=mw.ustring.lower(term)
	
	for _, rule in ipairs(rules) do
		term = gsub(term, rule[1], rule[2])
	end
	
	return term
end

return export