const logger = require('./logger.js');
const util = require('./util.js');
const commands = require('./commands.js');

const CMD = 'oscsend';

async function send(controller, channel, value) {
    if (controller === undefined || channel === undefined) {
        return;
    }
    if (value === undefined || isNaN(value) || value < 0) {
        value = 0;
    } else if (value > 127) {
        value = 127;
    }
    logger.debug('sending value \'' + value + '\' to controller \'' + controller + '\' on channel \'' + channel + '\'...');
    try {
        await commands.execute(CMD, [
            global.config.osc.host, global.config.osc.port,
            global.config.osc.address,
            'm',
            '00' + util.toHex(value) + '0' + util.toHex(controller) + 'b' + util.toHex(channel)
        ]);
    } catch (err) {
        throw new Error(err);
    }
    return value;
}

async function sendByRequest(id, args) {
    if (args === undefined) {
        throw new Error('no arguments defined');
    }
    const controller = args.get('controller');
    if (controller === undefined) {
        throw new Error('missing argument \'controller\'');
    }
    const channel = args.get('channel');
    if (channel === undefined) {
        throw new Error('missing argument \'channel\'');
    } let value = args.get('value');
    if (value === undefined) {
        throw new Error('missing argument \'value\'');
    }
    try {
        return JSON.stringify({ status: 'ok', controller: controller, channel: channel, value: await send(controller, channel, value) });
    } catch (err) {
        return JSON.stringify({ status: 'error', error: err });
    }
}

module.exports = {
    send,
    sendByRequest
}