var params = JSON.parse(value),
	request = new HttpRequest(),
	data = [],
	error_msg = [],
	measurement,
	temp_unit,
	wind_unit,
	errors_only = [],
	error_locations = [],
	unique_errors,
	new_error_msg;

function getHttpData(query) {
	url = params.api_endpoint + query + '&appid=' + params.apikey + '&units=' + params.units + '&lang=' + params.lang;
	response = request.get(url);
	Zabbix.log(4, '[ Openweathermap ] [ ' + url + ' ] Received response with status code ' + request.getStatus() + ': ' + response);

	if (response !== null) {
		try {
			response = JSON.parse(response);
		}
		catch (error) {
			throw 'Failed to parse response.';
		}
	}

	if (request.getStatus() !== 200) {
		if (response.error && response.error.message) {
			throw response.error.message;
		}
		else {
			throw 'Failed to receive data. Invalid response status code: ' + request.getStatus();
		}
	}
	return response;
}

switch (params.units) {
	case 'metric':
		measurement = 'metric';
		temp_unit = 'C';
		wind_unit = 'meter/sec';
		break;
	case 'imperial':
		measurement = 'imperial';
		temp_unit = 'F';
		wind_unit = 'miles/hour';
		break;
	default:
		measurement = 'standard';
		temp_unit = 'K';
		wind_unit = 'meter/sec';
}

locations = params.location.split('|');
for (var i in locations) {
	try {
		if (/^[0-9]+$/g.test(locations[i])) {
			result = getHttpData('id=' + locations[i]);
		}
		else if (/^.*,[\w]+$/g.test(locations[i])) {
			result = getHttpData('zip=' + locations[i]);
		}
		else if (/^(\-)?[0-9]{1,2}(\.[0-9]+)?,(\-)?[0-9]{1,2}(\.[0-9]+)?/g.test(locations[i])) {
			coordinates = locations[i].split(',');
			result = getHttpData('lat=' + coordinates[0] + '&lon=' + coordinates[1]);
		}
		else {
			result = getHttpData('q=' + encodeURIComponent(locations[i]));
		}
		if (!data.filter(function (location) { return location.id === result.id; }).length) {
			result.measurement = measurement;
			result.temp_unit = temp_unit;
			result.wind_unit = wind_unit;
			data.push(result);
		}
	} catch (error) {
		errors = {};
		errors.location = locations[i];
		errors.error = error.toString();
		error_msg.push(errors);
		errors_only.push(error.toString());
	}
}

if (error_msg.length === 0) {
	return JSON.stringify({
		'data': data,
		'errors': error_msg.toString()
	});
} else {
	unique_errors = errors_only.filter(function (value, index, self) {
		return self.indexOf(value) == index;
	});

	if (unique_errors.length === 1) {
		for (var j in error_msg) {
			error_locations.push(error_msg[j].location);
		}
		new_error_msg = 'Failed to retrieve data for the following locations: ' + error_locations + '. ' + unique_errors[0];
		return JSON.stringify({
			'data': data,
			'errors': new_error_msg
		});
	} else {
		return JSON.stringify({
			'data': data,
			'errors': error_msg
		});
	}
}