var request = require('request-promise');
var common = require('../../routes/common');
var logger = require('../shared/logger');
var options = {};

exports.listChannels = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'Channels', msg: 'Getting Channels..'});
  options = common.getOptions();
  options.url = common.getSelLNServerUrl() + '/v1/channel/listChannels';
  request(options).then(function (body) {
    logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'List Channels', data: body});
    body.map(channel => {
      if (!channel.alias || channel.alias === '') { channel.alias = channel.id.substring(0, 20); }
      local = (channel.msatoshi_to_us) ? channel.msatoshi_to_us : 0;
      remote = (channel.msatoshi_to_them) ? channel.msatoshi_to_them : 0;
      total = channel.msatoshi_total ? channel.msatoshi_total : 0;
      channel.balancedness = (total == 0) ? 1 : (1 - Math.abs((local-remote)/total)).toFixed(3);
    })
    logger.log({level: 'INFO', fileName: 'Channels', msg: 'Channels Received'});
    res.status(200).json(body);
  })
  .catch(errRes => {
    const err = common.handleError(errRes,  'Channels', 'List Channels Error');
    return res.status(err.statusCode).json({message: err.message, error: err.error});
  });
}

exports.openChannel = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'Channels', msg: 'Opening Channel..'});
  options = common.getOptions();
  options.url = common.getSelLNServerUrl() + '/v1/channel/openChannel';
  options.body = req.body;
  logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Open Channel Options', data: options.body});
  request.post(options).then((body) => {
    logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Open Channel Response', data: body});
    logger.log({level: 'INFO', fileName: 'Channels', msg: 'Channel Opened'});
    res.status(201).json(body);
  })
  .catch(errRes => {
    const err = common.handleError(errRes,  'Channels', 'Open Channel Error');
    return res.status(err.statusCode).json({message: err.message, error: err.error});
  });
}

exports.setChannelFee = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'Channels', msg: 'Setting Channel Fee..'});
  options = common.getOptions();
  options.url = common.getSelLNServerUrl() + '/v1/channel/setChannelFee';
  options.body = req.body;
  logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Update Channel Policy Options', data: options.body});
  request.post(options).then((body) => {
    logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Update Channel Policy', data: body});
    logger.log({level: 'INFO', fileName: 'Channels', msg: 'Channel Fee Set'});
    res.status(201).json(body);
  })
  .catch(errRes => {
    const err = common.handleError(errRes,  'Channels', 'Update Channel Policy Error');
    return res.status(err.statusCode).json({message: err.message, error: err.error});
  });
}

exports.closeChannel = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'Channels', msg: 'Closing Channel..'});
  req.setTimeout(60000 * 10); // timeout 10 mins
  options = common.getOptions();
  const unilateralTimeoutQuery = req.query.force ? '?unilateralTimeout=1' : '';
  options.url = common.getSelLNServerUrl() + '/v1/channel/closeChannel/' + req.params.channelId + unilateralTimeoutQuery;
  logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Closing Channel', data: options.url});
  request.delete(options).then((body) => {
    logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Close Channel Response', data: body});
    logger.log({level: 'INFO', fileName: 'Channels', msg: 'Channel Closed'});
    res.status(204).json(body);
  })
  .catch(errRes => {
    const err = common.handleError(errRes,  'Channels', 'Close Channel Error');
    return res.status(err.statusCode).json({message: err.message, error: err.error});
  });  
}

exports.getLocalRemoteBalance = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'Channels', msg: 'Getting Local & Remote Balances..'});
  options = common.getOptions();
  options.url = common.getSelLNServerUrl() + '/v1/channel/localremotebal';
  request(options).then(function (body) {
    logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Local Remote Balance', data: body});
    if (!body.localBalance) { body.localBalance = 0; }
    if (!body.remoteBalance) { body.remoteBalance = 0; }
    logger.log({level: 'INFO', fileName: 'Channels', msg: 'Local & Remote Balances Received'});
    res.status(200).json(body);
  })
  .catch(errRes => {
    const err = common.handleError(errRes,  'Channels', 'Local Remote Balance Error');
    return res.status(err.statusCode).json({message: err.message, error: err.error});
  });
};

exports.listForwards = (req, res, next) => {
  logger.log({level: 'INFO', fileName: 'Channels', msg: 'Getting Channel List Forwards..'});
  options = common.getOptions();
  options.url = common.getSelLNServerUrl() + '/v1/channel/listForwards?status=' + req.query.status;
  request.get(options).then((body) => {
    logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Forwarding History Response For Status ' + req.query.status, data: body});
    if (body && body.length > 0) { body = common.sortDescByKey(body, 'received_time'); }
    logger.log({level: 'DEBUG', fileName: 'Channels', msg: 'Forwarding History Received For Status' + req.query.status, data: body});
    logger.log({level: 'INFO', fileName: 'Channels', msg: 'Channel List Forwards Received For Status ' + req.query.status});
    res.status(200).json(body);
  })
  .catch(errRes => {
    const err = common.handleError(errRes,  'Channels', 'Forwarding History Error');
    return res.status(err.statusCode).json({message: err.message, error: err.error});
  });
};