p = {};

function p.fromTemplate( frame )
	local args = frame.args;
	return p.generateLink( args[ 1 ], args[ 2 ], args[ 'title' ] );
end

function p.fromModule( context, options, id )
	return p.generateLink( options[ 'property' ], id, options[ 'title' ], context, options );
end

function p.generateLink( propertyId, id, title, context, options )
	propertyId = propertyId:upper()

	if p[ propertyId ] then
		return p[ propertyId ]( context, options, id );
	end

	local pattern = p.findPattern( propertyId )
	if pattern then
		local link = mw.ustring.gsub( pattern, '$1', id );

		if not title or title == '' then
			title = id;
		end

		return '[' .. link .. ' ' .. title .. ']';
	end

	return id
end

function p.P212( context, options, id )
	if id:match("^[%s-0-9X]*$") or id:match("^%s*ISBN[%s-0-9X]*$") then
		return '[[Special:Booksources/' .. id .. '|' .. id .. ']]';
	else
		local frame = mw.getCurrentFrame();
		if id:match("<br") or id:match("\\*") then
			return frame:expandTemplate{ title = 'Yanlış ISBN', args = { ['1']=id, noprefix='1', nolink='1' } };
		else
			return frame:expandTemplate{ title = 'Yanlış ISBN', args = { ['1']=id, noprefix='1' } };
		end
	end
end

function p.P267( context, options, id )
	local frame = mw.getCurrentFrame();
	return frame:expandTemplate{ title = 'ATX', args = { id } };
end

function p.P345( context, options, id )
	local prefix = options and options.prefix
    local number = id
    if not string.match( id, '^%d' ) then
    	prefix = string.sub( id, 1, 2 )
    	number = string.sub( id, 3 )
	end
    local label = 'ID' .. number
    if prefix == 'co' then
		return '[[IMDbCompany:' .. number .. '|' .. label .. ']]'
    end
    if prefix == 'nm' then
		return '[[IMDbName:' .. number .. '|' .. label .. ']]'
    end
    if prefix == 'tt' then
		return '[[IMDbTitle:' .. number .. '|' .. label .. ']]'
    end

	return id;
end

function p.P884( context, options, id )
    local frame = mw.getCurrentFrame();
    local HydrologyBookTom = string.sub(id, 13, 14);
    local HydrologyBookVypusk = string.sub(id, 15, 15);

    if HydrologyBookTom == '99' then
        return '[https://verum.wiki/index.php?claster=gvr&q=' .. id .. ' ' .. id .. ']';
    else
        local ref = frame:callParserFunction{ name = '#tag:ref', args = { '{{YSE HM|' .. HydrologyBookTom .. '|' .. HydrologyBookVypusk .. '}}' } };

        return '[https://verum.wiki/index.php?claster=gvr&q=' .. id .. ' ' .. id .. ']' .. ref;
    end
end

function p.P957( context, options, id )
	return '[[Special:Booksources/' .. id .. '|' .. id .. ']]';
end

function p.findPattern( property )
	local entity = mw.wikibase.getEntity( property:upper() );
	if entity then
		local statements = entity:getBestStatements( 'P1630' );
		for _, statement in pairs( statements ) do
			if statement.mainsnak.snaktype == 'value' then
				return statement.mainsnak.datavalue.value;
			end
		end
	end
	return nil;
end

return p;