模块:地区用词

local p = {}
local variants = {
	cn = 'hans',
	hk = 'hant',
	mo = 'hant',
	my = 'hans',
	sg = 'hans',
	tw = 'hant',
}
local lc = require( 'Module:WikitextLC' )

function p._main( args, frame )
	local values = {}	-- dict<region:string> => <script:string, term:int>,
						-- where "term" is the index of the relevant string in "terms"
	local terms = {}	-- table of term objects:
						--		regions: table<region:string>, regions that use this term
						--		hans, hant: string, term in different scripts

	local showLocal = args.showLocal and args.showLocal ~= 'no'
	local showForeign = args.showForeign and args.showForeign ~= 'no'

	-- fill region values, simp and trad, from explicit definitions
	for region, defaultScript in pairs( variants ) do
		if args['zh-hans-' .. region] ~= '' or args['zh-hant-' .. region] ~= '' or args['zh-' .. region] ~= '' then
			local term = { regions = { region } }

			if args['zh-hans-' .. region] ~= '' then
				term.hans = args['zh-hans-' .. region]
			elseif args['zh-' .. region] ~= '' then
				term.hans = lc.converted( args['zh-' .. region], 'zh-hans' )
			else
				term.hans = lc.converted( args['zh-hant-' .. region], 'zh-hans' )
			end

			if args['zh-hant-' .. region] ~= '' then
				term.hant = args['zh-hant-' .. region]
			elseif args['zh-' .. region] ~= '' then
				term.hant = lc.converted( args['zh-' .. region], 'zh-hant' )
			else
				term.hant = lc.converted( args['zh-hans-' .. region], 'zh-hant' )
			end

			table.insert( terms, term )
			values[region] = { script = defaultScript, term = #terms }
		end
	end

	-- link up "equiv" aliases for missing regions
	for region, defaultScript in pairs( variants ) do
		if values[region] == nil and values[args['equiv-' .. region]] ~= nil then
			table.insert( terms[values[args['equiv-' .. region]].term].regions, region )
			values[region] = { script = defaultScript, term = values[args['equiv-' .. region]].term }
		end
	end

	local localName = {}
	for region, value in pairs( values ) do
		localName['zh-' .. region] = terms[value.term][value.script]
	end

	localName = args.beforeTerm .. lc.selective( localName ) .. args.afterTerm

	local foreignName = {}
	for region, script in pairs( variants ) do
		local snippets = {}
		for _, term in pairs( terms ) do
			local termRegions = {}
			for _, termRegion in pairs( term.regions ) do
				if not args.stripLocal or args.stripLocal == '' or termRegion ~= region and not (values[termRegion] and values[region] and values[termRegion].term == values[region].term) then
					table.insert( termRegions, termRegion )
				end
			end
			if #termRegions > 0 then
				table.sort( termRegions )
				local maybeNameKey = 'name-' .. table.concat( termRegions, '-' )
				local name
				if args[maybeNameKey] and args[maybeNameKey] ~= '' then
					name = args[maybeNameKey]
				else
					local names = {}
					for _, termRegion in pairs( termRegions ) do
						table.insert( names, args['name-' .. termRegion] )
					end
					name = mw.text.listToText( names, args.nameComma, args.nameLastComma )
				end
				name = lc.converted( name .. args.colon, 'zh-' .. region )
				table.insert( snippets, name .. args.beforeTerm .. term[script] .. args.afterTerm )
			end
		end
		foreignName['zh-' .. region] = mw.text.listToText( snippets, lc.converted( args.comma, 'zh-' .. region ), lc.converted( args.lastComma, 'zh-' .. region ) )
	end
	foreignName = lc.selective( foreignName )

	if showLocal then
		local ret = localName .. args.afterLocal
		if showForeign then
			ret = ret .. args.openBracket .. foreignName .. args.closeBracket
		end
		return ret
	elseif showForeign then
		return foreignName
	end
	error('[[Module:地区用词]]: Nothing to show.')
end

function p.main( frame )
	local args = {}
	for k, v in pairs( frame:getParent().args ) do
		args[k] = v
	end
	for k, v in pairs( frame.args ) do
		args[k] = v
	end
	return p._main( args, frame )
end

return p