--
-- melisma - extensible and scriptable audio engine
-- Copyright (C) 2026  Ludvig Gunne Lindström
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU General Public License as published by
-- the Free Software Foundation, either version 3 of the License, or
-- (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program.  If not, see <https://www.gnu.org/licenses/>.
--

local m_ladspa = require 'melisma.ladspa'

local M = {}

function M.init(spec,...)
	local interface = {}
	local info = m_ladspa.info(spec)
	local instance = m_ladspa.load(spec,...)
	local audio_index = 1
	local control_index = 1

	for _,port in ipairs(info.ports) do
		if port.type == 'control' and port.direction == 'input' then
			local control_index_copy = control_index

			interface[port.name] = function(self,value)
				if port.hints.upper_bound and value > port.hints.upper_bound then
					value = port.hints.upper_bound
				end

				if port.hints.lower_bound and value < port.hints.lower_bound then
					value = port.hints.lower_bound
				end

				instance:control(control_index_copy,value)
				return self
			end

			if port.hints.default then
				interface[port.name](nil,port.hints.default)
			end

			control_index = control_index + 1
		end

		if port.type == 'audio' and port.direction == 'output' then
			interface[port.name] = instance(audio_index)
			audio_index = audio_index + 1
		end
	end

	return interface
end

return M