local gt = require("Modul:grammar-table")
local export = require("Modul:grammar")

local lang_code_param                          = "be"
local part_of_speech_param                     = "verb"
local past_participle_passive_param            = "ppp"
local imperfective_templatename                = "be-verb-impf"
local perfective_templatename                  = "be-verb-pf"
local imperfective_and_perfective_templatename = "be-verb-impfpf"

function export._getAcceptedParameters()
	return {past_participle_passive_param}
end

function export._getForms(pagename, templatename, args, meta, format)

	local forms = {}
	
	if meta.aspect == "impf" or meta.aspect == "impfpf" then
		forms.pres_sing_1_pers    = args or "?"
		forms.pres_sing_2_pers    = args or "?"
		forms.pres_sing_3_pers    = args or "?"
		forms.pres_plur_1_pers    = args or "?"
		forms.pres_plur_2_pers    = args or "?"
		forms.pres_plur_3_pers    = args or "?"
		forms.x_pres_gerund       = args or "?"
		forms.x_pret_gerund       = args or "?"
	end
	
	if meta.aspect == "pf" or meta.aspect == "impfpf" then
		forms.fut_sing_1_pers     = args or "?"
		forms.fut_sing_2_pers     = args or "?"
		forms.fut_sing_3_pers     = args or "?"
		forms.fut_plur_1_pers     = args or "?"
		forms.fut_plur_2_pers     = args or "?"
		forms.fut_plur_3_pers     = args or "?"
	end

	if meta.aspect == "pf" then
		forms.x_pret_gerund       = args or "?"
	end
	
	forms.pret_sing_mask   = args or "?"
	forms.pret_sing_neutr  = args or "?"
	forms.pret_sing_fem    = args or "?"
	forms.pret_plur        = args or "?"
	forms.imp_sing         = args or "?"
	forms.imp_plur         = args or "?"
	forms.x_pret_part_pass = args ~= "" and args or "-"

	return forms
end

function export._getMeta(pagename, templatename, args)
	local is_imperfective     = templatename == imperfective_templatename or templatename == imperfective_and_perfective_templatename
	local is_perfective       = templatename == perfective_templatename or templatename == imperfective_and_perfective_templatename
	local aspect              = ""
	local numbered_cells      = 0
	local basic_form_is_given = args; 

	if is_imperfective and is_perfective then
		aspect = "impfpf"
		numbered_cells = 14
	elseif is_imperfective then
		aspect = "impf"
		numbered_cells = 14
	elseif is_perfective then
		aspect = "pf"
		numbered_cells = 13
	end

	local meta = {}
	meta.numbered_cells      = numbered_cells
	meta.named_cells         = {}
	meta.aspect              = aspect
	meta.basic_form_is_given = basic_form_is_given

	return meta
end

function export._getWikitable(forms, meta)
	local contains_a_quality_notice  = not not meta.quality_notice
	local note                       = meta.note
	local as_first_part              = meta.as_first_part
	local number_of_columns          = 4
	local aspect                     = meta.aspect
	local aspect_cell                = {}
    local present_or_future_cell     = {}
	local table_section_divider      = '|-\n!colspan="4" style="background:#BFB76D; padding:1px;"|\n|-\n' --should be somewhere else

	local pres_or_fut_sing_1_pers = ""
	local pres_or_fut_sing_2_pers = ""
	local pres_or_fut_sing_3_pers = ""
	local pres_or_fut_plur_1_pers = ""
	local pres_or_fut_plur_2_pers = ""
	local pres_or_fut_plur_3_pers = ""

	if aspect == "impf" then
		aspect_cell = {'!class="main" colspan="2"', "imperfektiv"}
		present_or_future_cell = {'!rowspan="3"', "Presens"}
		pres_or_fut_sing_1_pers = forms.pres_sing_1_pers
		pres_or_fut_sing_2_pers = forms.pres_sing_2_pers
		pres_or_fut_sing_3_pers = forms.pres_sing_3_pers
		pres_or_fut_plur_1_pers = forms.pres_plur_1_pers
		pres_or_fut_plur_2_pers = forms.pres_plur_2_pers
		pres_or_fut_plur_3_pers = forms.pres_plur_3_pers
	elseif aspect == "pf" then
		aspect_cell = {'!class="main" colspan="2"', "perfektiv"}
		present_or_future_cell = {'!rowspan="3"', "Futurum"}
		pres_or_fut_sing_1_pers = forms.fut_sing_1_pers
		pres_or_fut_sing_2_pers = forms.fut_sing_2_pers
		pres_or_fut_sing_3_pers = forms.fut_sing_3_pers
		pres_or_fut_plur_1_pers = forms.fut_plur_1_pers
		pres_or_fut_plur_2_pers = forms.fut_plur_2_pers
		pres_or_fut_plur_3_pers = forms.fut_plur_3_pers
	elseif aspect == "impfpf" then
		aspect_cell = {'!class="main" colspan="2"', "imperfektiv och perfektiv"}
		present_or_future_cell = {'!rowspan="3"', "Presens / Futurum"}
		pres_or_fut_sing_1_pers = forms.fut_sing_1_pers
		pres_or_fut_sing_2_pers = forms.fut_sing_2_pers
		pres_or_fut_sing_3_pers = forms.fut_sing_3_pers
		pres_or_fut_plur_1_pers = forms.fut_plur_1_pers
		pres_or_fut_plur_2_pers = forms.fut_plur_2_pers
		pres_or_fut_plur_3_pers = forms.fut_plur_3_pers
	end

	gt.setLanguage(lang_code_param)

	local str = ""

	str = str
	.. gt.getStart(number_of_columns, lang_code_param, part_of_speech_param, contains_a_quality_notice)
	.. gt.getRow({'!class="main min" colspan="2"', 'Böjningar av ' .. meta.pagename .. ' ' .. meta.meanings}, {'!rowspan="2"', 'Singular'}, {'!rowspan="2"', 'Plural'})
	.. gt.getRow(aspect_cell)
	.. gt.getRow(present_or_future_cell,         {'!', '1:a person'}, pres_or_fut_sing_1_pers, pres_or_fut_plur_1_pers)
	.. gt.getRow(                                {'!', '2:a person'}, pres_or_fut_sing_2_pers, pres_or_fut_plur_2_pers)
	.. gt.getRow(                                {'!', '3:e person'}, pres_or_fut_sing_3_pers, pres_or_fut_plur_3_pers)
	.. gt.getRow({'!rowspan="3"', "Preteritum"}, {'!', 'Maskulinum'}, forms.pret_sing_mask,   {'|rowspan="3"', forms.pret_plur})
	.. gt.getRow(                                {'!', 'Neutrum'},    forms.pret_sing_neutr)
	.. gt.getRow(                                {'!', 'Femininum'},  forms.pret_sing_fem)
	.. gt.getRow({'!', "Imperativ"},             {'!', '2:a person'}, forms.imp_sing, forms.imp_plur)
	.. table_section_divider
	.. gt.getRow({'!', "Particip"}, {'!', "Aktiv"}, {'!', "Passiv"}, {'!', "Gerundium"})

	if aspect == "impf" or aspect == "impfpf"  then
		str = str
		.. gt.getRow({'!', "Presens"}, '-', '-', {'|', forms.x_pres_gerund, type='some_recognizable_adv_type_here'})
	end

	str = str
	.. gt.getRow({'!', "Preteritum"}, '-', {'|', forms.x_pret_part_pass, type='some_recognizable_adv_type_here'}, {'|', forms.x_pret_gerund, type='some_recognizable_adv_type_here'})
	.. gt.getEnd(number_of_columns, note, as_first_part)

	return str
end

function export._getCategories(forms, meta)
	local basic_form_is_not_given = not meta.basic_form_is_given
	local one_or_more_forms_are_missing =
	forms.pres_sing_1_pers == "?" or
	forms.pres_sing_2_pers == "?" or
	forms.pres_sing_3_pers == "?" or
	forms.pres_plur_1_pers == "?" or
	forms.pres_plur_2_pers == "?" or
	forms.pres_plur_3_pers == "?" or
	forms.fut_sing_1_pers  == "?" or
	forms.fut_sing_2_pers  == "?" or
	forms.fut_sing_3_pers  == "?" or
	forms.fut_plur_1_pers  == "?" or
	forms.fut_plur_2_pers  == "?" or
	forms.fut_plur_3_pers  == "?" or
	forms.pret_sing_mask   == "?" or
	forms.pret_sing_neutr  == "?" or
	forms.pret_sing_fem    == "?" or
	forms.pret_plur        == "?" or
	forms.imp_sing         == "?" or
	forms.imp_plur         == "?" or
	forms.x_pres_gerund    == "?" or
	forms.x_pret_gerund    == "?" or
	forms.x_pret_part_pass == "?"
	
	local str = ""
	if one_or_more_forms_are_missing then
		str = str .. "]"
	end

	if basic_form_is_not_given then
		str = str .. "]"
	end

	return str
end

return export