var mongoose = require('mongoose'),
  Client = mongoose.model('Client'),
  Workorder = mongoose.model('Workorder'),
  Device = mongoose.model('Device'),
  Tag = mongoose.model('Tag');

var log = require('log4node');

var frequencies = [
  "Medical Device","Sterilizer - TT",
  "Vaporizer",
  "Ice Maker",
  "Anesthesia",
  "Waste Management System",
  "Imaging",
  "Medical Gas Systems",
  "RAE",
  "ERT",
  "N2O Trace Gas",
  "Sterilizer - F",
  "Quarterly",
  "Semi",
  "Annual",
  "legacy",
  "DLLR",
  "Isolation Panel",
  "Battery Backup",
  "Sterilizer - Cleaning"
];

exports.index = function(req, res) {
  log.info("clients.index");
  var query = Client.find({ deleted: false })
    .select('name identifier address')
    .slice('contacts', 1)
    .sort('name')
    .exec(function(err, results) {
      if (err) {
        res.json(500, err);
      } else {
        res.json(results);
      }
    });
}

exports.get = function(req, res, next) {
  var id = req.param('client_id');

  log.info("clients.get %s", id);
  Client.findById(id)
    .exec(function(err, client) {
      if (err) return next(err);
      if (!client) return next(new Error('Failed to load client ' + id));

      res.json(client);
    });
}

exports.frequencies = function(req, res, next) {
  log.info("clients.frequencies");

  var query = Client.find({ deleted: false })
    .select('name identifier frequencies')
    .slice('contacts', 1)
    .sort('name')
    .exec(function(err, results) {
      if (err) {
        res.json(500, err);
      } else {
        res.json(results);
      }
    });
};

exports.workorders = function(req, res, next) {
  var id = req.param('client_id');
  log.info("clients.workorders %s", id);

  Workorder.find({ client: id, deleted: false })
    .populate({path: 'techs', select: 'name'})
    .sort('-scheduling.start')
    .exec(function(err, workorders) {
    if (err) return next(err);
    if (!workorders) return next(new Error('Failed to load workorders ' + id));

    res.json(workorders);
  });
};

exports.tags = function(req, res, next) {
  var id = req.param('client_id');
  log.info("clients.tags %s", id);

  Tag.find({ client: id })
    .exec(function(err, tags) {
      if (err) return next(err);
      if (!tags) return next(new Error('Failed to load tags ' + id));

      res.json(tags);
    });
};

exports.devices = function(req, res, next) {
  var id = req.param('client_id');
  log.info("clients.devices %s", id);

  Device.find({client: id, deleted: false })
    .populate({path: 'deviceType'})
    .exec(function(err, devices) {
      if (err) return next(err);
      if (!devices) return next(new Error('Failed to load devices ' + id));

      res.json(devices);
    });  
}

exports.create = function(req, res, next) {
  log.info("clients.create %j", req.body);

  var client = new Client({
    name: req.body.name,
    identifier: req.body.identifier.toUpperCase(),
    contacts: req.body.contacts,
    address: req.body.address,
    notes: req.body.notes,
    frequencies: {}
  });

  var freq = {};

  for (key in frequencies) {
    client.frequencies[frequencies[key]] = [false, false, false, false, false, false, false, false, false, false, false, false];
  }

  return client.save(function(err) {
    if (err)
      log.error("Error: %s", err);

    return res.json(client);
  })
};

exports.isUnique = function(req, res, next) {
  
  var field = req.param('field');
  var value = req.param('value');
  var key = req.param('key');

  if (!field || !value) {
    return res.json(400, 'missing field or value');   
  }

  var query = {};
  
  if (field === 'identifier') {
    query[field] = value.toUpperCase();
  } else {
    query[field] = value;
  }

  if (key) {
    query['_id'] = { $ne: key };
  }

  Client.find(query)
    .exec(function(err, result) {
      if (err) return next(err);
      res.json({
        isUnique: result.length === 0
      });
    });
};

exports.update = function(req, res, next) {
  var id = req.param('client_id');
  log.info("clients.update %s %j", id, req.body);

  return Client.findById(id, function(err, client) {
    client.name = req.body.name;
    client.identifier = req.body.identifier.toUpperCase();
    client.address = req.body.address;
    client.frequencies = req.body.frequencies;
    client.notes = req.body.notes;
    

    // name phone email

    for (var i = 0; i < 2; i++) {
      if (req.body.contacts[i]) {
        client.contacts.set(i, {});
        client.contacts[i].name = req.body.contacts[i].name;
        client.contacts[i].phone = req.body.contacts[i].phone;
        client.contacts[i].email = req.body.contacts[i].email;
      } else {
        client.contacts[i] = null;
      }
    }

    client.markModified('contacts');

    console.log(client);

    return client.save(function(err) {
      if (err)
        log.error("Error: %s", err);

      return res.json(client);
    });
  });
};

exports.destroy = function(req, res, next) {
  var id = req.param('client_id');

  log.info("clients.destroy %s", id);

  return Client.findById(id, function(err, client) {
    client.deleted = true;

    return client.save(function(err) {
      if (err)
        log.error("Error: %s", err);

      return res.json(client);
    })
  });
};