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local lang = require("Module:languages").getByCode("sma")

local export = {}


-- Inflection functions

function export.even(frame)
	local fparams = {
	}
	
	local fargs = require("Module:parameters").process(frame.args, fparams)
	
	local params = {
		[1] = {required = true, default = "{{{1}}}"},
	}
	
	local args = require("Module:parameters").process(frame:getParent().args, params)
	local stem = require("Module:sma-common").Stem(args[1])
	
	local data = {
		forms = {},
		info = "even " .. require("Module:links").full_link({lang = lang, alt = stem.uvowel}, "term") .. "-stem",
		categories = {},
	}
	
	if not (mw.ustring.find(stem.uvowel, "^[aeiu]$") or stem.uvowel == "ie" or stem.uvowel == "oe") and mw.title.getCurrentTitle().nsText ~= "Template" then
		error("The final vowel(s) of the stem must be one of a, e, i, u, ie, oe.")
	end
	
	table.insert(data.categories, lang:getCanonicalName() .. " even verbs")
	table.insert(data.categories, lang:getCanonicalName() .. " even " .. (stem.uvowel or "") .. "-stem verbs")
	
	data.forms["inf"]       = {stem:make_form{ending = "dh", variant = "normal3"}}
	data.forms["past|ptcp"] = {stem:make_form{ending = "me", variant = "e3"}}
	data.forms["conn"]      = {stem:make_form{ending = "h", variant = "h"}}
	
	data.forms["1|s|pres|indc"] = {stem:make_form{ending = "m", variant = "pres_1sg"}}
	data.forms["2|s|pres|indc"] = {stem:make_form{ending = "h", variant = "pres_2sg"}}
	data.forms["3|s|pres|indc"] = {stem:make_form{variant = "pres_3sg"}}
	data.forms["1|d|pres|indc"] = {stem:make_form{ending = "n", variant = "pres_1du_3pl"}}
	data.forms["2|d|pres|indc"] = {stem:make_form{ending = "den", variant = "normal3"}, stem:make_form{ending = "jidien", variant = "jV"}}
	data.forms["3|d|pres|indc"] = {stem:make_form{ending = "jægan", variant = "jV"}}
	data.forms["1|p|pres|indc"] = {stem:make_form{ending = "be", variant = "normal3"}, stem:make_form{ending = "jibie", variant = "jV"}}
	data.forms["2|p|pres|indc"] = {stem:make_form{ending = "de", variant = "normal3"}, stem:make_form{ending = "jidie", variant = "jV"}}
	data.forms["3|p|pres|indc"] = {stem:make_form{ending = "h", variant = "pres_1du_3pl"}}
	
	data.forms["1|s|past|indc"] = {stem:make_form{ending = "jim", variant = "j"}, stem:make_form{ending = "jim", variant = "j_I"}}
	data.forms["2|s|past|indc"] = {stem:make_form{ending = "jih", variant = "j"}, stem:make_form{ending = "jih", variant = "j_I"}}
	data.forms["3|s|past|indc"] = {stem:make_form{ending = "ji", variant = "j"}, stem:make_form{ending = "ji", variant = "j_I"}}
	data.forms["1|d|past|indc"] = {stem:make_form{ending = "jimen", variant = "j"}, stem:make_form{ending = "jimen", variant = "j_I"}}
	data.forms["2|d|past|indc"] = {stem:make_form{ending = "jiden", variant = "j"}, stem:make_form{ending = "jiden", variant = "j_I"}}
	data.forms["3|d|past|indc"] = {stem:make_form{ending = "jigan", variant = "j"}, stem:make_form{ending = "jigan", variant = "j_I"}}
	data.forms["1|p|past|indc"] = {stem:make_form{ending = "jimh", variant = "j"}, stem:make_form{ending = "jimh", variant = "j_I"}}
	data.forms["2|p|past|indc"] = {stem:make_form{ending = "jidh", variant = "j"}, stem:make_form{ending = "jidh", variant = "j_I"}}
	data.forms["3|p|past|indc"] = {stem:make_form{ending = "jin", variant = "j"}, stem:make_form{ending = "jin", variant = "j_I"}}
	
	data.forms["2|s|impr"] = {stem:make_form{ending = "h", variant = "h"}}
	data.forms["2|d|impr"] = {stem:make_form{ending = "den", variant = "normal3"}, stem:make_form{ending = "jidien", variant = "jV"}}
	data.forms["2|p|impr"] = {stem:make_form{ending = "de", variant = "normal3"}, stem:make_form{ending = "jidie", variant = "jV"}}

	postprocess(args, data)
	
	return make_table(data)
end


function export.odd(frame)
	local fparams = {
	}
	
	local fargs = require("Module:parameters").process(frame.args, fparams)
	
	local params = {
		[1] = {required = true, default = "{{{1}}}"},
	}
	
	local args = require("Module:parameters").process(frame:getParent().args, params)
	local stem = require("Module:sma-common").Stem(args[1])
	
	local data = {
		forms = {},
		info = "odd",
		categories = {},
	}
	
	if stem.ucons == "" and mw.title.getCurrentTitle().nsText ~= "Template" then
		error("The stem must end in a consonant.")
	end
	
	table.insert(data.categories, lang:getCanonicalName() .. " odd verbs")
	
	data.forms["inf"]       = {stem:make_form{ending = "idh"}}
	data.forms["past|ptcp"] = {stem:make_form{ending = "amme"}}
	data.forms["conn"]      = {stem:make_form{ending = "h", variant = "normal3"}}
	
	data.forms["1|s|pres|indc"] = {stem:make_form{ending = "em", variant = "normal3"}}
	data.forms["2|s|pres|indc"] = {stem:make_form{ending = "h", variant = "normal3"}}
	data.forms["3|s|pres|indc"] = {stem:make_form{ending = "e", variant = "normal3"}}
	data.forms["1|d|pres|indc"] = {stem:make_form{ending = "ien"}}
	data.forms["2|d|pres|indc"] = {stem:make_form{ending = "idien"}}
	data.forms["3|d|pres|indc"] = {stem:make_form{ending = "ægan"}}
	data.forms["1|p|pres|indc"] = {stem:make_form{ending = "ibie"}}
	data.forms["2|p|pres|indc"] = {stem:make_form{ending = "idie"}}
	data.forms["3|p|pres|indc"] = {stem:make_form{ending = "ieh"}}
	
	data.forms["1|s|past|indc"] = {stem:make_form{ending = "im"}}
	data.forms["2|s|past|indc"] = {stem:make_form{ending = "ih"}}
	data.forms["3|s|past|indc"] = {stem:make_form{ending = "i"}}
	data.forms["1|d|past|indc"] = {stem:make_form{ending = "imen"}}
	data.forms["2|d|past|indc"] = {stem:make_form{ending = "iden"}}
	data.forms["3|d|past|indc"] = {stem:make_form{ending = "igan"}}
	data.forms["1|p|past|indc"] = {stem:make_form{ending = "imh"}}
	data.forms["2|p|past|indc"] = {stem:make_form{ending = "idh"}}
	data.forms["3|p|past|indc"] = {stem:make_form{ending = "in"}}
	
	data.forms["2|s|impr"] = {stem:make_form{ending = "h", variant = "normal3"}}
	data.forms["2|d|impr"] = {stem:make_form{ending = "idien"}}
	data.forms["2|p|impr"] = {stem:make_form{ending = "idie"}}
	
	postprocess(args, data)
	
	return make_table(data)
end


function postprocess(args, data)
	for key, forms in pairs(data.forms) do
		-- Remove duplicate forms
		forms = require("Module:table").removeDuplicates(forms)
		data.forms[key] = forms
	end
	
	data.lemma = data.forms["inf"][1]
	
	-- Check if the lemma form matches the page name
	if (lang:makeEntryName(data.lemma)) ~= mw.title.getCurrentTitle().text then
		table.insert(data.categories, lang:getCanonicalName() .. " entries with inflection not matching pagename")
	end
end


-- Make the table
function make_table(data)
	local function repl(param)
		local accel = true
		local no_store = false
		
		if param == "info" then
			return mw.getContentLanguage():ucfirst(data.info or "")
		elseif string.sub(param, 1, 1) == "!" then
			no_store = true
			param = string.sub(param, 2)
		elseif string.sub(param, 1, 1) == "#" then
			accel = false
			param = string.sub(param, 2)
		end
		
		local forms = data.forms[param]
		
		if not forms then
			return "—"
		end
		
		local ret = {}
		
		for key, subform in ipairs(forms) do
			table.insert(ret, require("Module:links").full_link({lang = lang, term = subform, accel = accel and {form = param, lemma = data.lemma, no_store = no_store} or nil}))
		end
		
		return table.concat(ret, "<br/>")
	end
	
	local wikicode = [=[
{| class="inflection-table vsSwitcher" data-toggle-category="inflection" style="border: solid 1px #CCCCFF;" cellspacing="1" cellpadding="2"
|- style="background: #E2F6E2; text-align: left;"
! class="vsToggleElement" colspan="4" | {{{info}}}
|- class="vsShow" style="background: #F2F2FF;"
! style="width: 11em; background: #E2F6E2;" | infinitive
| style="width: 15em;" colspan="2" | {{{!inf}}}
|- class="vsShow" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 1st&nbsp;sing.&nbsp;present
| colspan="2" | {{{!1|s|pres|indc}}}
|- class="vsShow" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 1st&nbsp;sing.&nbsp;past
| colspan="2" | {{{!1|s|past|indc}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | infinitive
| colspan="3" | {{{inf}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | past&nbsp;participle
| colspan="3" | {{{past|ptcp}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | connegative
| colspan="3" | {{{conn}}}
|- class="vsHide"
! style="background: #C0E4C0; width: 11em;" |
! style="background: #C0E4C0; width: 15em;" | present indicative
! style="background: #C0E4C0; width: 15em;" | past indicative
! style="background: #C0E4C0; width: 15em;" | imperative
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 1st&nbsp;singular
| data-accel-col="1" | {{{1|s|pres|indc}}}
| data-accel-col="2" | {{{1|s|past|indc}}}
| data-accel-col="3" | {{{1|s|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 2nd&nbsp;singular
| data-accel-col="1" | {{{2|s|pres|indc}}}
| data-accel-col="2" | {{{2|s|past|indc}}}
| data-accel-col="3" | {{{2|s|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 3rd&nbsp;singular
| data-accel-col="1" | {{{3|s|pres|indc}}}
| data-accel-col="2" | {{{3|s|past|indc}}}
| data-accel-col="3" | {{{3|s|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 1st&nbsp;dual
| data-accel-col="1" | {{{1|d|pres|indc}}}
| data-accel-col="2" | {{{1|d|past|indc}}}
| data-accel-col="3" | {{{1|d|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 2nd&nbsp;dual
| data-accel-col="1" | {{{2|d|pres|indc}}}
| data-accel-col="2" | {{{2|d|past|indc}}}
| data-accel-col="3" | {{{2|d|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 3rd&nbsp;dual
| data-accel-col="1" | {{{3|d|pres|indc}}}
| data-accel-col="2" | {{{3|d|past|indc}}}
| data-accel-col="3" | {{{3|d|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 1st&nbsp;plural
| data-accel-col="1" | {{{1|p|pres|indc}}}
| data-accel-col="2" | {{{1|p|past|indc}}}
| data-accel-col="3" | {{{1|p|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 2nd&nbsp;plural
| data-accel-col="1" | {{{2|p|pres|indc}}}
| data-accel-col="2" | {{{2|p|past|indc}}}
| data-accel-col="3" | {{{2|p|impr}}}
|- class="vsHide" style="background: #F2F2FF;"
! style="background: #E2F6E2;" | 3rd&nbsp;plural
| data-accel-col="1" | {{{3|p|pres|indc}}}
| data-accel-col="2" | {{{3|p|past|indc}}}
| data-accel-col="3" | {{{3|p|impr}}}
|}]=]

	return mw.ustring.gsub(wikicode, "{{{[#!]?([a-z0-9|]+)}}}", repl) .. require("Module:utilities").format_categories(data.categories, lang)
end

return export