Module:rue-pron

--Adapted from [[Module:es-pronunc]] by [[User:Benwing2]]

local export = {}

local m_IPA = require("Module:IPA")
local m_table = require("Module:table")
local audio_module = "Module:audio"
local put_module = "Module:parse utilities"

local force_cat = false -- for testing

local lang = require("Module:languages").getByCode("rue")
local u = mw.ustring.char
local rfind = mw.ustring.find
local rsubn = mw.ustring.gsub
local rmatch = mw.ustring.match
local rsplit = mw.text.split
local ulower = mw.ustring.lower
local uupper = mw.ustring.upper
local usub = mw.ustring.sub
local ulen = mw.ustring.len
local unfd = mw.ustring.toNFD
local unfc = mw.ustring.toNFC

local AC = u(0x0301) -- acute =  ́
local GR = u(0x0300) -- grave =  ̀
local DIA = u(0x0308) -- diaeresis =  ̈
local BR = u(0x0306) -- breve

local SYLDIV = u(0xFFF0) -- used to represent a user-specific syllable divider (.) so we won't change it
local vowel = "aeɛioɔuɪɤаеіиыоуяєїёюАЕІЫОУЯЄЇЁЮ" -- vowels
local V = "[" .. vowel .. "]" -- vowel class
local accent = AC .. GR
local accent_c = "[" .. accent .. "]"
local stress = AC .. GR
local stress_c = "[" .. AC .. GR .. "]"
local ipa_stress = "ˈˌ"
local ipa_stress_c = "[" .. ipa_stress .. "]"
local sylsep = "%-." .. SYLDIV -- hyphen included for syllabifying from spelling
local sylsep_c = "[" .. sylsep .. "]"
local wordsep = "# "
local separator_not_wordsep = accent .. ipa_stress .. sylsep
local separator = separator_not_wordsep .. wordsep
local separator_c = "[" .. separator .. "]"
local C = "[^" .. vowel .. separator .. "]" -- consonant class
local C_OR_WORDSEP = "[^" .. vowel .. separator_not_wordsep .. "]" -- consonant class, or word separator

-- version of rsubn() that discards all but the first return value
local function rsub(term, foo, bar)
	local retval = rsubn(term, foo, bar)
	return retval
end

-- version of rsubn() that returns a 2nd argument boolean indicating whether
-- a substitution was made.
local function rsubb(term, foo, bar)
	local retval, nsubs = rsubn(term, foo, bar)
	return retval, nsubs > 0
end

-- apply rsub() repeatedly until no change
local function rsub_repeatedly(term, foo, bar)
	while true do
		local new_term = rsub(term, foo, bar)
		if new_term == term then
			return term
		end
		term = new_term
	end
end

local function decompose(text)
	-- decompose everything but ї, ё, й
	text = unfd(text)
	text = rsub(text, ".[" .. DIA .. BR .. "]", {
		["і" .. DIA] = "ї",
		["І" .. DIA] = "Ї",
		["е" .. DIA] = "ё",
		["Е" .. DIA] = "Ё",
		["и" .. BR] = "й",
		["И" .. BR] = "Й",
	})
	return text
end

local function split_on_comma(term)
	if term:find(",%s") then
		return require(put_module).split_on_comma(term)
	else
		return rsplit(term, ",")
	end
end

-- Remove any HTML from the formatted text and resolve links, since the extra characters don't contribute to the
-- displayed length.
local function convert_to_raw_text(text)
	text = rsub(text, "<.->", "")
	if text:find("%[%[") then
		text = require("Module:links").remove_links(text)
	end
	return text
end

-- Return the approximate displayed length in characters.
local function textual_len(text)
	return ulen(convert_to_raw_text(text))
end

-- Main syllable-division algorithm
local function syllabify_from_spelling_or_pronun(text, is_spelling)
    -- Part 1: Divide before the last consonant in a cluster of consonants between vowels, hiatuses too
	text = rsub_repeatedly(text, "(" .. V .. accent_c .. "*)(" .. C .. V .. ")", "%1.%2")
	text = rsub_repeatedly(text, "(" .. V .. accent_c .. "*" .. C .. "+)(" .. C .. V .. ")", "%1.%2")
	text = rsub_repeatedly(text, "(" .. V .. accent_c .. "*)(" .. V .. ")", "%1.%2")
	
	-- Part 2: Group soft/hard signs with the previous consonant
	text = rsub(text, "%.([ьъ])", "%1.")
	
	return text
end

local function syllabify_from_spelling(text)
	text = decompose(text)
	-- Temporary replacements for characters we want treated as default consonants.
	text = rsub(text, "дз", "s")
	text = rsub(text, "Дз", "S")
	text = rsub(text, "дж", "j")
	text = rsub(text, "Дж", "J")

	-- Change user-specified . into SYLDIV so we don't shuffle it around when dividing into syllables.
	text = text:gsub("%.", SYLDIV)
	text = syllabify_from_spelling_or_pronun(text, "is spelling")
		
	text = text:gsub(SYLDIV, ".")
	text = text:gsub("s", "дз")
	text = text:gsub("S", "Дз")
	text = text:gsub("j", "дж")
	text = text:gsub("J", "Дж")

	text = unfc(text)
	return text
end


-- Generate the IPA of a given respelling
function export.IPA(text)
	local debug = {}
	
	text = ulower(text or mw.title.getCurrentTitle().text)
	-- decompose everything but ä, ë, ï
	text = decompose(text)
	-- convert commas and en/en dashes to IPA foot boundaries
	text = rsub(text, "%s*[,–—]%s*", " | ")
	-- question mark or exclamation point in the middle of a sentence -> IPA foot boundary
	text = rsub(text, "([^%s])%s*[¡!¿?]%s*([^%s])", "%1 | %2")

	-- canonicalize multiple spaces and remove leading and trailing spaces
	local function canon_spaces(text)
		text = rsub(text, "%s+", " ")
		text = rsub(text, "^ ", "")
		text = rsub(text, " $", "")
		return text
	end

	text = canon_spaces(text)

	-- Convert hyphens to spaces
	text = rsub(text, "%-$", "@") --we will use this symbol to allow generating the pronunciation of unstressed prefixes
	text = rsub(text, "%-", " ")
	-- canonicalize multiple spaces again, which may have been introduced by hyphens
	text = canon_spaces(text)
	-- now eliminate punctuation
	text = rsub(text, "[¡!¿?']", "")
	-- put # at word beginning and end and double ## at text/foot boundary beginning/end
	text = rsub(text, " | ", "# | #")
	text = "##" .. rsub(text, " ", "# #") .. "##"
	
	--vowels (we will change <eo> to <ɛɔ> later)
	text = rsub(text, "ь([яєїёю])", "ъ%1") --the soft sign has the function of the hard sign in some older spellings
	vowel_conv = {["а"] = "a", ["е"] = "e", ["і"] = "i", ["и"] = "ɪ", ["ы"] = "ɤ", ["о"] = "ɔ", ["у"] = "u", ["я"] = "ja", ["є"] = "je", ["ї"] = "ji", ["ё"] = "jo", ["ю"] = "ju"}
	text = rsub(text, "[аеіиыоуяєїёю]", vowel_conv)
	
	--consonants (we will switch to the IPA <ɡ> later)
	cons_conv = {
		["б"] = "b", ["п"] = "p", 
		["к"] = "k", ["ґ"] = "g", 
		["т"] = "t", ["д"] = "d", 
		["м"] = "m", ["н"] = "n", 
		["ц"] = "c", ["ч"] = "č",
		["ш"] = "ʃ", ["с"] = "s",
		["ф"] = "f", ["г"] = "h",
		["в"] = "v", ["з"] = "z",
		["х"] = "x", ["ж"] = "ʒ",
		["л"] = "l", ["р"] = "r"
	}
	text = rsub(text, "дз", "y")
	text = rsub(text, "дж", "ђ")
	text = rsub(text, "[бпкґтдмнцчшсфгвзхжлр]", cons_conv)
	
	--palatalization
	palat_pairs = {["t"] = "ť", ["d"] = "ď", ["n"] = "ń", ["s"] = "ś", ["z"] = "ź", ["r"] = "ŕ", ["l"] = "ĺ", ["c"] = "ć", ["y"] = "ý"}
	text = rsub(text, "([tdnszrlcy])([ьj])", function(letter, pal) return palat_pairs[letter] end)

	text = rsub(text, "ъ", "")
	text = rsub(text, "й", "j")
	
	--assimilation of voicelessness
	voice_pairs = {["b"] = "p", ["d"] = "t", ["ď"] = "ť", ["g"] = "k", ["z"] = "s", ["ź"] = "ś", ["ʒ"] = "ʃ", ["h"] = "x", ["ђ"] = "č", ["y"] = "c", ["ý"] = "ć"}
	voiceless_pairs = {["p"] = "b", ["t"] = "d", ["ť"] = "ď", ["k"] = "g", ["f"] = "v", ["s"] = "z", ["ś"] = "ź", ["ʃ"] = "ʒ", ["x"] = "h", ["c"] = "y", ["ć"] = "ý", ["č"] = "ђ"}
	text = rsub_repeatedly(text, "([bdďgzźʒhђyý])([#%s]*)([ptťkcćčfsśʃx])", function(prev_c, sep, next_c) return voice_pairs[prev_c] .. sep .. next_c end)
	text = rsub(text, "([bdďgzźʒhђyý])#", function(prev_c) return voice_pairs[prev_c] .. "#" end)
	
	--/v~w/
	text = rsub(text, "(" .. V .. ")(" .. accent_c .."*)v(" .. C .. ")", "%1%2w%3")
	text = rsub(text, "(" .. V .. ")(" .. accent_c .."*)v#", "%1%2w#")
	text = rsub(text, "wj", "vj")
	
	--assimilation of voicedness
	text = rsub_repeatedly(text, "([ptťkfsśʃxcćč])([#%s]*)([bdďgvzźʒhђyý])", function(prev_c, sep, next_c) return voiceless_pairs[prev_c] .. sep .. next_c end)

	--assimilation of palatalization
	text = rsub_repeatedly(text, "([tdnszrlcy])([ťďńśźŕĺćýђčщ])", function(prev_c, next_c) return palat_pairs[prev_c] .. next_c end)
	
	--assimilation of place of articulation
	text = rsub(text, "s([#%s]*)([ʃč])", "ʃ%1%2")
	text = rsub(text, "z([#%s]*)([ʒђ])", "ʒ%1%2")

	--syllable division
	text = syllabify_from_spelling_or_pronun(text, false)

	--stress
	local accent_to_stress_mark = {[AC] = "ˈ", [GR] = "ˌ"}
	local words = rsplit(text, " ")
	for j, word in ipairs(words) do
		local syllables = rsplit(word, "%.")
		if #syllables > 1 and not (rfind(word, AC) or rfind(word, "@")) then
			error("Multisyllabic words that are not prefixes or suffixes must have an acute accent marking the stress.")
		end
		for i = 1, #syllables do
				syllables[i] = rsub(syllables[i], "^(.*)(" .. accent_c .. ")(.*)$",
					function(pre, accent, post) return accent_to_stress_mark[accent] .. pre .. post end
				)
		end
		words[j] = table.concat(syllables, ".")
		-- suppress syllable mark before IPA stress indicator
		words[j] = rsub(words[j], "%.(" .. ipa_stress_c .. ")", "%1")
		--make all primary stresses but the last one be secondary
		words[j] = rsub_repeatedly(words[j], "ˈ(.+)ˈ", "ˈ%1ˌ")
	end
	
	text = table.concat(words, " ")
	text = rsub(text, "@", "")
	
	--final conversions
	final_conversions={ 
		["g"] = "ɡ", ["ť"] = "tʲ",
		["ń"] = "nʲ", ["ď"] = "dʲ",
		["ś"] = "sʲ", ["ź"] = "zʲ",
		["ŕ"] = "rʲ", ["ĺ"] = "lʲ",
		["ć"] = "t͡sʲ", ["c"] = "t͡s",
		["č"] = "t͡ʃ", ["y"] = "d͡z",
		["ý"] = "d͡zʲ", ["ђ"] = "d͡ʒ",
		["e"] = "ɛ", ["o"] = "ɔ"}
	text = rsub(text, "[geońťďśźŕĺcćčyýђ]",final_conversions)
	text = rsub(text, "ʃ([%.]*)ʃ", "%1ʃː")
	text = rsub(text, "ʒ([%.]*)ʒ", "%1ʒː")
	text = rsub(text, "щ", "ʃt͡ʃ")

	text = rsub(text, "#", "")
	text = unfc(text)

	return {text = text}
end

local function express_all_styles(dodialect)
	local ret = {
		pronun = {},
		expressed_styles = {},
	}

	dodialect(ret)

	table.insert(ret.expressed_styles, {
			styles = {{pronun = ret.pronun,}},
		})
	
	return ret
end


local function format_all_styles(expressed_styles, format_style)
	for i, style_group in ipairs(expressed_styles) do
		style_group.formatted, style_group.formatted_len =
				format_style(style_group.styles[1].tag, style_group.styles[1], i == 1)
	end
	local lines = {}
	for i, style_group in ipairs(expressed_styles) do
		table.insert(lines, style_group.formatted)
	end
	return table.concat(lines, "\n")
end


local function dodialect_pronun(args, ret)
	ret.pronun = {}
	for i, term in ipairs(args.terms) do
		local phonemic
		local phonetic
		if term.raw then
			phonemic = term.raw_phonemic
			phonetic = term.raw_phonetic
		else
			phonetic = export.IPA(term.term)
			phonetic = phonetic.text
		end
		local refs
		if not term.ref then
			refs = nil
		else
			refs = {}
			for _, refspec in ipairs(term.ref) do
				local this_refs = require("Module:references").parse_references(refspec)
				for _, this_ref in ipairs(this_refs) do
					table.insert(refs, this_ref)
				end
			end
		end

		ret.pronun[i] = {
			raw = term.raw,
			phonemic = phonemic,
			phonetic = phonetic,
			refs = refs,
			q = term.q,
			qq = term.qq,
			a = term.a,
			aa = term.aa,
		}
	end
end

local function generate_pronun(args)
	local function this_dodialect_pronun(ret)
		dodialect_pronun(args, ret)
	end

	local ret = express_all_styles(this_dodialect_pronun)

	local function format_style(tag, expressed_style, is_first)
		local pronunciations = {}
		local formatted_pronuns = {}

		local function ins(formatted_part)
			table.insert(formatted_pronuns, formatted_part)
		end

		-- Loop through each pronunciation.
		for j, pronun in ipairs(expressed_style.pronun) do
			-- Add tag to left qualifiers if first one
			-- FIXME: Consider using accent qualifier for the tag instead.
			local qs = pronun.q
			if j == 1 and tag then
				if qs then
					qs = m_table.deepcopy(qs)
					table.insert(qs, tag)
				else
					qs = {tag}
				end
			end

			local first_pronun = #pronunciations + 1

			if not pronun.phonetic and not pronun.phonemic then
				error("Internal error: Saw no phonetic or phonemic pronunciation")
			end
			
			if pronun.phonetic then
				local brack_pron = "[" .. pronun.phonetic:gsub("%.", "") .. "]"
				table.insert(pronunciations, {
					pron = brack_pron,
				})
				ins(brack_pron)
			end
			
			if pronun.phonemic then --this is needed if we use parameters of the form raw:/.../, but in most cases this code won't be used
				local slash_pron = "/" .. pronun.phonemic:gsub("%.", "") .. "/"
				table.insert(pronunciations, {
					pron = slash_pron,
				})
				ins(slash_pron)
			end

			local last_pronun = #pronunciations

			if qs then
				pronunciations[first_pronun].q = qs
			end
			if pronun.a then
				pronunciations[first_pronun].a = pronun.a
			end
			if j > 1 then
				pronunciations[first_pronun].separator = ", "
				ins(", ")
			end
			if pronun.qq then
				pronunciations[last_pronun].qq = pronun.qq
			end
			if pronun.aa then
				pronunciations[last_pronun].aa = pronun.aa
			end
			if qs or pronun.qq or pronun.a or pronun.aa then
				-- Note: This inserts the actual formatted qualifier text, including HTML and such, but the later call
				-- to textual_len() removes all HTML and reduces links.
				ins(require("Module:pron qualifier").format_qualifiers {
					lang = lang,
					text = "",
					q = qs,
					qq = pronun.qq,
					a = pronun.a,
					aa = pronun.aa,
				})
			end

			if pronun.refs then
				pronunciations[last_pronun].refs = pronun.refs
				-- Approximate the reference using a footnote notation. This will be slightly inaccurate if there are
				-- more than nine references but that is rare.
				ins(string.rep("[1]", #pronun.refs))
			end
			if first_pronun ~= last_pronun then
				pronunciations[last_pronun].separator = " "
				ins(" ")
			end
		end

		local bullet = string.rep("*", args.bullets) .. " "
		-- Here we construct the formatted line in `formatted`, and also try to construct the equivalent without HTML
		-- and wiki markup in `formatted_for_len`, so we can compute the approximate textual length for use in sizing
		-- the toggle box with the "more" button on the right.
		local pre = is_first and args.pre and args.pre .. " " or ""
		local post = is_first and args.post and " " .. args.post or ""
		local formatted = bullet .. pre .. m_IPA.format_IPA_full { lang = lang, items = pronunciations, separator = "" } .. post
		local formatted_for_len = bullet .. pre .. "IPA(key): " .. table.concat(formatted_pronuns) .. post
		return formatted, textual_len(formatted_for_len)
	end

	ret.text = format_all_styles(ret.expressed_styles, format_style)

	return ret
end


local function parse_respelling(respelling, pagename, parse_err)
	local raw_respelling = respelling:match("^raw:(.*)$")
	if raw_respelling then
		local raw_phonemic = raw_respelling:match("^/(.*)/ %[(.*)%]$")
		if not raw_phonemic then
			raw_phonemic = raw_respelling:match("^/(.*)/$")
		end
		if not raw_phonemic then
			parse_err(("Unable to parse raw respelling '%s', should be one of /.../, [...] or /.../ [...]")
				:format(raw_respelling))
		end
		return {
			raw = true,
			raw_phonemic = raw_phonemic,
		}
	end
	if respelling == "+" then
		respelling = pagename
	end
	return {term = respelling}
end


-- Return the number of syllables of a phonemic representation, which should have syllable dividers in it but no hyphens.
local function get_num_syl_from_phonemic(phonemic)
	-- Maybe we should just count vowels instead of the below code.
	phonemic = rsub(phonemic, "|", " ") -- remove IPA foot boundaries
	local words = rsplit(phonemic, " +")
	for i, word in ipairs(words) do
		-- IPA stress marks are syllable divisions if between characters; otherwise just remove.
		word = rsub(word, "(.)[ˌˈ](.)", "%1.%2")
		word = rsub(word, "[ˌˈ]", "")
		words[i] = word
	end
	-- There should be a syllable boundary between words.
	phonemic = table.concat(words, ".")
	return ulen(rsub(phonemic, "[^.]", "")) + 1
end


-- Get the rhyme by truncating everything up through the last stress mark + any following consonants, and remove
-- syllable boundary markers.
local function convert_phonemic_to_rhyme(phonemic)
	return rsub(rsub(phonemic, ".*[ˌˈ]", ""), "^[^" .. vowel .. "]*", ""):gsub("%.", "")
end


local function split_syllabified_spelling(spelling)
	return rsplit(spelling, "%.")
end


-- "Align" syllabification to original spelling by matching character-by-character, allowing for extra syllable and
-- accent markers in the syllabification. If we encounter an extra syllable marker (.#), we allow and keep it. If we
-- encounter an extra accent marker in the syllabification, we drop it. In any other case, we return nil indicating
-- the alignment failed.
local function align_syllabification_to_spelling(syllab, spelling)
	local result = {}
	local syll_chars = rsplit(decompose(syllab), "")
	local spelling_chars = rsplit(decompose(spelling), "")
	local i = 1
	local j = 1
	while i <= #syll_chars or j <= #spelling_chars do
		local ci = syll_chars[i]
		local cj = spelling_chars[j]
		if ci == cj then
			table.insert(result, ci)
			i = i + 1
			j = j + 1
		elseif ci == "." or ci == "#" then
			table.insert(result, ci)
			i = i + 1
		elseif ci == AC or ci == GR then
			-- skip character
			i = i + 1
		else
			-- non-matching character
			return nil
		end
	end
	if i <= #syll_chars or j <= #spelling_chars then
		-- left-over characters on one side or the other
		return nil
	end
	return unfc(table.concat(result))
end


local function generate_hyph_obj(term)
	return {syllabification = term, hyph = split_syllabified_spelling(term)}
end


-- Word should already be decomposed.
local function word_has_vowels(word)
	--FIXME Add all words consisting of a single consonant
	if word == "з" then
		return true
	end
	return rfind(word, V)
end


local function all_words_have_vowels(term)
	local words = rsplit(decompose(term), "[ %-]")
	for i, word in ipairs(words) do
		-- Allow empty word; this occurs with prefixes and suffixes.
		if word ~= "" and not word_has_vowels(word) then
			return false
		end
	end
	return true
end


local function should_generate_rhyme_from_respelling(term)
	local words = rsplit(decompose(term), " +")
	return #words == 1 and -- no if multiple words
		not words[1]:find(".%-.") and -- no if word is composed of hyphenated parts
		not words[1]:find("%-$") and -- no if word is a prefix
		not words[1]:find("^%-") and words[1]:find(AC) and -- no if word is unstressed (ie has no explicit stress)
		word_has_vowels(words[1]) -- no if word has no vowels (e.g. a single letter)
end


local function should_generate_rhyme_from_ipa(ipa)
	return not ipa:find("%s") and word_has_vowels(decompose(ipa))
end


local function dodialect_specified_rhymes(rhymes, hyphs, parsed_respellings, rhyme_ret)
	rhyme_ret.pronun = {}
	for _, rhyme in ipairs(rhymes) do
		local num_syl = rhyme.num_syl
		local no_num_syl = false

		-- If user explicitly gave the rhyme but didn't explicitly specify the number of syllables, try to take it from
		-- the hyphenation.
		if not num_syl then
			num_syl = {}
			for _, hyph in ipairs(hyphs) do
				if should_generate_rhyme_from_respelling(hyph.syllabification) then
					local this_num_syl = 1 + ulen(rsub(hyph.syllabification, "[^.]", ""))
					m_table.insertIfNot(num_syl, this_num_syl)
				else
					no_num_syl = true
					break
				end
			end
			if no_num_syl or #num_syl == 0 then
				num_syl = nil
			end
		end

		-- If that fails and term is single-word, try to take it from the phonemic.
		if not no_num_syl and not num_syl then
			for _, parsed in ipairs(parsed_respellings) do
				for dialect, pronun in pairs(parsed.pronun.pronun) do
					-- Check that pronun.phonemic exists (it may not if raw phonetic-only pronun is given).
					if pronun.phonemic then
						if not should_generate_rhyme_from_ipa(pronun.phonemic) then
							no_num_syl = true
							break
						end
						-- Count number of syllables by looking at syllable boundaries (including stress marks).
						local this_num_syl = get_num_syl_from_phonemic(pronun.phonemic)
						m_table.insertIfNot(num_syl, this_num_syl)
					end
				end
				if no_num_syl then
					break
				end
			end
			if no_num_syl or #num_syl == 0 then
				num_syl = nil
			end
		end

		table.insert(rhyme_ret.pronun, {
			rhyme = rhyme.rhyme,
			num_syl = num_syl,
			qualifiers = rhyme.qualifiers,
		})
	end
end


local function parse_pron_modifier(arg, parse_err, generate_obj, param_mods, no_split_on_comma)
	local retval = {}

	if arg:find("<") then
		local insert = { store = "insert" }
		param_mods.q = insert
		param_mods.qq = insert
		param_mods.a = insert
		param_mods.aa = insert
		return require(put_module).parse_inline_modifiers(arg, {
			param_mods = param_mods,
			generate_obj = generate_obj,
			parse_err = parse_err,
			splitchar = not no_split_on_comma and "," or nil,
		})
	elseif no_split_on_comma then
		table.insert(retval, generate_obj(arg))
	else
		for _, term in ipairs(split_on_comma(arg)) do
			table.insert(retval, generate_obj(term))
		end
	end

	return retval
end


local function parse_rhyme(arg, parse_err)
	local function generate_obj(term)
		return {rhyme = term}
	end
	local param_mods = {
		s = {
			item_dest = "num_syl",
			convert = function(arg, parse_err)
				local nsyls = rsplit(arg, ",")
				for i, nsyl in ipairs(nsyls) do
					if not nsyl:find("^[0-9]+$") then
						parse_err("Number of syllables '" .. nsyl .. "' should be numeric")
					end
					nsyls[i] = tonumber(nsyl)
				end
				return nsyls
			end,
		},
	}

	return parse_pron_modifier(arg, parse_err, generate_obj, param_mods)
end


local function parse_hyph(arg, parse_err)
	-- None other than qualifiers
	local param_mods = {}

	return parse_pron_modifier(arg, parse_err, generate_hyph_obj, param_mods)
end


local function parse_homophone(arg, parse_err)
	local function generate_obj(term)
		return {term = term}
	end
	local param_mods = {
		t = {
			-- We need to store the <t:...> inline modifier into the "gloss" key of the parsed term,
			-- because that is what [[Module:links]] (called from [[Module:homophones]]) expects.
			item_dest = "gloss",
		},
		gloss = {},
		pos = {},
		alt = {},
		lit = {},
		id = {},
		g = {
			-- We need to store the <g:...> inline modifier into the "genders" key of the parsed term,
			-- because that is what [[Module:links]] (called from [[Module:homophones]]) expects.
			item_dest = "genders",
			convert = function(arg)
				return rsplit(arg, ",")
			end,
		},
	}

	return parse_pron_modifier(arg, parse_err, generate_obj, param_mods)
end


local function generate_audio_obj(arg)
	local file, gloss
	if arg:find("#") then
		file, gloss = arg:match("^(.-)%s*#%s*(.*)$")
	else
		file, gloss = arg:match("^(.-)%s*;%s*(.*)$")
	end
	if not file then
		file = arg
		gloss = "Audio"
	end
	return {file = file, gloss = gloss}
end


local function parse_audio(arg, parse_err)
	-- None other than qualifiers
	local param_mods = {}

	-- Don't split on comma because some filenames have embedded commas not followed by a space
	-- (typically followed by an underscore).
	return parse_pron_modifier(arg, parse_err, generate_audio_obj, param_mods, "no split on comma")
end


-- External entry point for {{rue-pr}}.
function export.show_pr(frame)
	local params = {
		[1] = {list = true},
		["rhyme"] = {},
		["hyph"] = {},
		["hmp"] = {},
		["audio"] = {list = true},
		["pagename"] = {},
	}
	local parargs = frame:getParent().args
	local args = require("Module:parameters").process(parargs, params)
	local pagename = args.pagename or mw.title.getCurrentTitle().subpageText

	-- Parse the arguments.
	local respellings = #args[1] > 0 and args[1] or {"+"}
	local parsed_respellings = {}
	local function overall_parse_err(msg, arg, val)
		error(msg .. ": " .. arg .. "= " .. val)
	end
	local overall_rhyme = args.rhyme and
		parse_rhyme(args.rhyme, function(msg) overall_parse_err(msg, "rhyme", args.rhyme) end) or nil
	local overall_hyph = args.hyph and
		parse_hyph(args.hyph, function(msg) overall_parse_err(msg, "hyph", args.hyph) end) or nil
	local overall_hmp = args.hmp and
		parse_homophone(args.hmp, function(msg) overall_parse_err(msg, "hmp", args.hmp) end) or nil
	local overall_audio
	if args.audio then
		overall_audio = {}
		for _, audio in ipairs(args.audio) do
			local parsed_audio = parse_audio(audio, function(msg) overall_parse_err(msg, "audio", audio) end)
			if #parsed_audio > 1 then
				error("Internal error: Saw more than one object returned from parse_audio")
			end
			table.insert(overall_audio, parsed_audio[1])
		end
	end
	for i, respelling in ipairs(respellings) do
		if respelling:find("<") then
			local param_mods = {
				pre = { overall = true },
				post = { overall = true },
				bullets = {
					overall = true,
					convert = function(arg, parse_err)
						if not arg:find("^[0-9]+$") then
							parse_err("Modifier 'bullets' should have a number as argument, but saw '" .. arg .. "'")
						end
						return tonumber(arg)
					end,
				},
				rhyme = {
					overall = true,
					store = "insert-flattened",
					convert = parse_rhyme,
				},
				hyph = {
					overall = true,
					store = "insert-flattened",
					convert = parse_hyph,
				},
				hmp = {
					overall = true,
					store = "insert-flattened",
					convert = parse_homophone,
				},
				audio = {
					overall = true,
					store = "insert-flattened",
					convert = parse_audio,
				},
				ref = { store = "insert" },
				q = { store = "insert" },
				qq = { store = "insert" },
				a = { store = "insert" },
				aa = { store = "insert" },
			}

			local parsed = require(put_module).parse_inline_modifiers(respelling, {
				paramname = i,
				param_mods = param_mods,
				generate_obj = function(term, parse_err)
					return parse_respelling(term, pagename, parse_err)
				end,
				splitchar = ",",
				outer_container = {
					audio = {}, rhyme = {}, hyph = {}, hmp = {}
				}
			})
			if not parsed.bullets then
				parsed.bullets = 1
			end
			table.insert(parsed_respellings, parsed)
		else
			local termobjs = {}
			local function parse_err(msg)
				error(msg .. ": " .. i .. "= " .. respelling)
			end
			for _, term in ipairs(split_on_comma(respelling)) do
				table.insert(termobjs, parse_respelling(term, pagename, parse_err))
			end
			table.insert(parsed_respellings, {
				terms = termobjs,
				audio = {},
				rhyme = {},
				hyph = {},
				hmp = {},
				bullets = 1,
			})
		end
	end

	if overall_hyph then
		local hyphs = {}
		for _, hyph in ipairs(overall_hyph) do
			if hyph.syllabification == "+" then
				hyph.syllabification = syllabify_from_spelling(pagename)
				hyph.hyph = split_syllabified_spelling(hyph.syllabification)
			elseif hyph.syllabification == "-" then
				overall_hyph = {}
				break
			end
		end
	end

	-- Loop over individual respellings, processing each.
	for _, parsed in ipairs(parsed_respellings) do
		parsed.pronun = generate_pronun(parsed)
		local no_auto_rhyme = false
		for _, term in ipairs(parsed.terms) do
			if term.raw then
				if not should_generate_rhyme_from_ipa(term.raw_phonemic) then
					no_auto_rhyme = true
					break
				end
			elseif not should_generate_rhyme_from_respelling(term.term) then
				no_auto_rhyme = true
				break
			end
		end

		if #parsed.hyph == 0 then
			if not overall_hyph and all_words_have_vowels(pagename) then
				for _, term in ipairs(parsed.terms) do
					if not term.raw then
						local syllabification = syllabify_from_spelling(term.term)
						local aligned_syll = align_syllabification_to_spelling(syllabification, pagename)
						if aligned_syll then
							m_table.insertIfNot(parsed.hyph, generate_hyph_obj(aligned_syll))
						end
					end
				end
			end
		else
			for _, hyph in ipairs(parsed.hyph) do
				if hyph.syllabification == "+" then
					hyph.syllabification = syllabify_from_spelling(pagename)
					hyph.hyph = split_syllabified_spelling(hyph.syllabification)
				elseif hyph.syllabification == "-" then
					parsed.hyph = {}
					break
				end
			end
		end

		-- Generate the rhymes.
		local function dodialect_rhymes_from_pronun(rhyme_ret)
			rhyme_ret.pronun = {}
			for _, pronun in ipairs(parsed.pronun.pronun) do
				-- We should have already excluded multiword terms and terms without vowels from rhyme generation (see
				-- `no_auto_rhyme` below). But make sure to check that pronun.phonemic exists (it may not if raw
				-- phonetic-only pronun is given).
				if pronun.phonetic or (pronun.phonemic and not pronun.phonetic) then
					local num_syl
					local rhyme
					if pronun.phonetic then
						-- Count number of syllables by looking at syllable boundaries (including stress marks).
						num_syl = get_num_syl_from_phonemic(pronun.phonetic)
						-- Get the rhyme by truncating everything up through the last stress mark + any following
						-- consonants, and remove syllable boundary markers.
						rhyme = convert_phonemic_to_rhyme(pronun.phonetic)
					else
						--Same as above, when using raw:/.../
						num_syl = get_num_syl_from_phonemic(pronun.phonemic)
						rhyme = convert_phonemic_to_rhyme(pronun.phonemic)
					end
					local saw_already = false
					for _, existing in ipairs(rhyme_ret.pronun) do
						if existing.rhyme == rhyme then
							saw_already = true
							m_table.insertIfNot(existing.num_syl, num_syl)
							break
						end
					end
					if not saw_already then
						table.insert(rhyme_ret.pronun, {
							rhyme = rhyme,
							num_syl = {num_syl},
						})
					end
				end
			end
		end

		if #parsed.rhyme == 0 then
			if overall_rhyme or no_auto_rhyme then
				parsed.rhyme = nil
			else
				parsed.rhyme = express_all_styles(dodialect_rhymes_from_pronun)
			end
		else
			local no_rhyme = false
			for _, rhyme in ipairs(parsed.rhyme) do
				if rhyme.rhyme == "-" then
					no_rhyme = true
					break
				end
			end
			if no_rhyme then
				parsed.rhyme = nil
			else
				local function this_dodialect(rhyme_ret, dialect)
					return dodialect_specified_rhymes(parsed.rhyme, parsed.hyph, {parsed}, rhyme_ret)
				end
				parsed.rhyme = express_all_styles(this_dodialect)
			end
		end
	end

	if overall_rhyme then
		local no_overall_rhyme = false
		for _, orhyme in ipairs(overall_rhyme) do
			if orhyme.rhyme == "-" then
				no_overall_rhyme = true
				break
			end
		end
		if no_overall_rhyme then
			overall_rhyme = nil
		else
			local all_hyphs
			if overall_hyph then
				all_hyphs = overall_hyph
			else
				all_hyphs = {}
				for _, parsed in ipairs(parsed_respellings) do
					for _, hyph in ipairs(parsed.hyph) do
						m_table.insertIfNot(all_hyphs, hyph)
					end
				end
			end
			local function dodialect_overall_rhyme(rhyme_ret, dialect)
				return dodialect_specified_rhymes(overall_rhyme, all_hyphs, parsed_respellings, rhyme_ret)
			end
			overall_rhyme = express_all_styles(dodialect_overall_rhyme)
		end
	end

	-- If all sets of pronunciations have the same rhymes, display them only once at the bottom.
	-- Otherwise, display rhymes beneath each set, indented.
	local first_rhyme_ret
	local all_rhyme_sets_eq = true
	for j, parsed in ipairs(parsed_respellings) do
		if j == 1 then
			first_rhyme_ret = parsed.rhyme
		elseif not m_table.deepEquals(first_rhyme_ret, parsed.rhyme) then
			all_rhyme_sets_eq = false
			break
		end
	end

	local function format_rhyme(rhyme_ret, num_bullets)
		local function format_rhyme_style(tag, expressed_style, is_first)
			local pronunciations = {}
			local rhymes = {}
			for _, pronun in ipairs(expressed_style.pronun) do
				table.insert(rhymes, pronun)
			end
			local data = {
				lang = lang,
				rhymes = rhymes,
				qualifiers = tag and {tag} or nil,
				force_cat = force_cat,
			}
			local bullet = string.rep("*", num_bullets) .. " "
			local formatted = bullet .. require("Module:rhymes").format_rhymes(data)
			local formatted_for_len_parts = {}
			table.insert(formatted_for_len_parts, bullet .. "Rhymes: " .. (tag and "(" .. tag .. ") " or ""))
			for j, pronun in ipairs(expressed_style.pronun) do
				if j > 1 then
					table.insert(formatted_for_len_parts, ", ")
				end
				if pronun.qualifiers then
					table.insert(formatted_for_len_parts, "(" .. table.concat(pronun.qualifiers, ", ") .. ") ")
				end
				table.insert(formatted_for_len_parts, "-" .. pronun.rhyme)
			end
			return formatted, textual_len(table.concat(formatted_for_len_parts))
		end

		return format_all_styles(rhyme_ret.expressed_styles, format_rhyme_style)
	end

	-- If all sets of pronunciations have the same hyphenations, display them only once at the bottom.
	-- Otherwise, display hyphenations beneath each set, indented.
	local first_hyphs
	local all_hyph_sets_eq = true
	for j, parsed in ipairs(parsed_respellings) do
		if j == 1 then
			first_hyphs = parsed.hyph
		elseif not m_table.deepEquals(first_hyphs, parsed.hyph) then
			all_hyph_sets_eq = false
			break
		end
	end

	local function format_hyphenations(hyphs, num_bullets)
		local hyphtext = require("Module:hyphenation").format_hyphenations { lang = lang, hyphs = hyphs, caption = "Syllabification" }
		return string.rep("*", num_bullets) .. " " .. hyphtext
	end

	-- If all sets of pronunciations have the same homophones, display them only once at the bottom.
	-- Otherwise, display homophones beneath each set, indented.
	local first_hmps
	local all_hmp_sets_eq = true
	for j, parsed in ipairs(parsed_respellings) do
		if j == 1 then
			first_hmps = parsed.hmp
		elseif not m_table.deepEquals(first_hmps, parsed.hmp) then
			all_hmp_sets_eq = false
			break
		end
	end

	local function format_homophones(hmps, num_bullets)
		local hmptext = require("Module:homophones").format_homophones { lang = lang, homophones = hmps }
		return string.rep("*", num_bullets) .. " " .. hmptext
	end

	local function format_audio(audios, num_bullets)
		local ret = {}
		for i, audio in ipairs(audios) do
			local text = require(audio_module).format_audio {
				lang = lang,
				file = audio.file,
				caption = audio.gloss,
				q = audio.q,
				qq = audio.qq,
				a = audio.a,
				aa = audio.aa,
			}
			table.insert(ret, string.rep("*", num_bullets) .. " " .. text)
		end
		return table.concat(ret, "\n")
	end

	local textparts = {}
	local min_num_bullets = 9999
	for j, parsed in ipairs(parsed_respellings) do
		if parsed.bullets < min_num_bullets then
			min_num_bullets = parsed.bullets
		end
		if j > 1 then
			table.insert(textparts, "\n")
		end
		table.insert(textparts, parsed.pronun.text)
		if #parsed.audio > 0 then
			table.insert(textparts, "\n")
			-- If only one pronunciation set, add the audio with the same number of bullets, otherwise
			-- indent audio by one more bullet.
			table.insert(textparts, format_audio(parsed.audio,
				#parsed_respellings == 1 and parsed.bullets or parsed.bullets + 1))
		end
		if not all_rhyme_sets_eq and parsed.rhyme then
			table.insert(textparts, "\n")
			table.insert(textparts, format_rhyme(parsed.rhyme, parsed.bullets + 1))
		end
		if not all_hyph_sets_eq and #parsed.hyph > 0 then
			table.insert(textparts, "\n")
			table.insert(textparts, format_hyphenations(parsed.hyph, parsed.bullets + 1))
		end
		if not all_hmp_sets_eq and #parsed.hmp > 0 then
			table.insert(textparts, "\n")
			table.insert(textparts, format_homophones(parsed.hmp, parsed.bullets + 1))
		end
	end
	if overall_audio and #overall_audio > 0 then
		table.insert(textparts, "\n")
		table.insert(textparts, format_audio(overall_audio, min_num_bullets))
	end
	if all_rhyme_sets_eq and first_rhyme_ret then
		table.insert(textparts, "\n")
		table.insert(textparts, format_rhyme(first_rhyme_ret, min_num_bullets))
	end
	if overall_rhyme then
		table.insert(textparts, "\n")
		table.insert(textparts, format_rhyme(overall_rhyme, min_num_bullets))
	end
	if all_hyph_sets_eq and #first_hyphs > 0 then
		table.insert(textparts, "\n")
		table.insert(textparts, format_hyphenations(first_hyphs, min_num_bullets))
	end
	if overall_hyph and #overall_hyph > 0 then
		table.insert(textparts, "\n")
		table.insert(textparts, format_hyphenations(overall_hyph, min_num_bullets))
	end
	if all_hmp_sets_eq and #first_hmps > 0 then
		table.insert(textparts, "\n")
		table.insert(textparts, format_homophones(first_hmps, min_num_bullets))
	end
	if overall_hmp and #overall_hmp > 0 then
		table.insert(textparts, "\n")
		table.insert(textparts, format_homophones(overall_hmp, min_num_bullets))
	end

	return table.concat(textparts)
end

return export