var Synergy = {
	params: {},
	session_id: null,
	api_version: null,

	setParams: function (params) {
		['username', 'password', 'base_url'].forEach(function (field) {
			if (typeof params !== 'object' || typeof params[field] === 'undefined' || params[field] === '') {
				throw 'Required param is not set: ' + field + '.';
			}
		});

		Synergy.params = params;
		if (typeof Synergy.params.base_url === 'string' && !Synergy.params.base_url.endsWith('/')) {
			Synergy.params.base_url += '/';
		}
	},

	checkVersion: function () {
		if (Synergy.api_version !== null) {
			return;
		}

		var response, request = new HttpRequest();
		request.addHeader('Content-Type: application/json');

		response = request.post(Synergy.params.base_url + 'rest/version');

		if (request.getStatus() !== 200) {
			throw 'Get version request failed with status code ' + request.getStatus() + ': ' + response;
		}

		if (response !== null) {
			try {
				version_data = JSON.parse(response);
			}
			catch (error) {
				throw 'Failed to parse get version response received from device API.';
			}
		}
		else {
			throw 'No data received by get version request.';
		}

		if ('currentVersion' in version_data && 'minimumVersion' in version_data) {
			if (version_data['minimumVersion'] <= 1200 && version_data['currentVersion'] >= 1200) {
				Synergy.api_version = 1200;
			} else {
				throw 'API version is not supported.';
			}
		} else {
			throw 'Get version response does not contain version.';
		}
	},

	login: function () {
		if (Synergy.session_id !== null || Synergy.api_version === null) {
			return;
		}

		var response, request = new HttpRequest();
		request.addHeader('Content-Type: application/json');
		request.addHeader('X-API-Version: ' + Synergy.api_version);

		response = request.post(Synergy.params.base_url + 'rest/login-sessions', JSON.stringify({
			'userName': Synergy.params.username,
			'password': Synergy.params.password
		}));

		if (request.getStatus() !== 200) {
			throw 'Auth request failed with status code ' + request.getStatus() + ': ' + response;
		}

		if (response !== null) {
			try {
				auth_data = JSON.parse(response);
			}
			catch (error) {
				throw 'Failed to parse auth response received from device API.';
			}
		}
		else {
			throw 'No data received by auth request.';
		}

		if ('sessionID' in auth_data) {
			Synergy.session_id = auth_data['sessionID'];
		} else {
			throw 'Auth response does not contain session ID.';
		}
	},

	logout: function () {
		if (Synergy.session_id !== null && Synergy.api_version !== null) {
			var response, request = new HttpRequest();
			request.addHeader('Content-Type: application/json');
			request.addHeader('X-API-Version: ' + Synergy.api_version);
			response = request.delete(Synergy.params.base_url + 'rest/login-sessions');
		}
	},

	requestData: function (method) {
		if (Synergy.session_id === null || Synergy.api_version === null) {
			return;
		}

		request = new HttpRequest();
		request.addHeader('Auth: ' + Synergy.session_id);
		request.addHeader('X-API-Version: ' + Synergy.api_version);

		raw_data = request.get(Synergy.params.base_url + 'rest/' + method);

		if (request.getStatus() < 200 || request.getStatus() >= 300) {
			throw 'Request failed with status code ' + request.getStatus() + ': ' + raw_data;
		}

		if (raw_data !== null) {
			try {
				return JSON.parse(raw_data);
			}
			catch (error) {
				throw 'Failed to parse response received from device API.';
			}
		}
		else {
			throw 'No data received by ' + method + ' request.';
		}
	}
};

var methods = ['datacenters', 'enclosures', 'ethernet-networks', 'fabrics', 'fc-networks', 'hypervisor-managers', 'interconnects', 'logical-enclosures', 'racks', 'server-hardware', 'storage-pools', 'storage-systems', 'storage-volumes', 'uplink-sets'],
	data = {};

data['errors'] = {};

try {
	Synergy.setParams(JSON.parse(value));

	try {
		Synergy.checkVersion();
	}
	catch (error) {
		data.errors.version = error.toString();
	}

	try {
		Synergy.login();
	}
	catch (error) {
		data.errors.auth = error.toString();
	}

	if (!('auth' in data.errors) && !('version' in data.errors)) {
		for (var i in methods) {
			try {
				if (methods[i] === 'enclosures') {
					var bays = ['applianceBays', 'crossBars', 'deviceBays', 'fanBays', 'partitions', 'powerSupplyBays', 'managerBays'];

					enclosures = Synergy.requestData(methods[i]);

					enclosures.members.forEach(function (enclosure) {
						enclosure_name = enclosure.name;

						for (var j in bays) {
							bay = enclosure[bays[j]];

							bay.forEach(function (b) {
								b.enclosureName = enclosure_name;
								enclosures.members[bays[j[b]]] = b;
							});
						}
					});

					data[methods[i]] = enclosures;
				}
				else {
					data[methods[i]] = Synergy.requestData(methods[i]);
				}
			}
			catch (error) {
				data.errors[methods[i]] = error.toString();
			}
		}
	}
}
catch (error) {
	data.errors.params = error.toString();
}

try {
	Synergy.logout();
}
catch (error) {
}

if (Object.keys(data.errors).length !== 0) {
	errors = 'Failed to receive data:';
	for (var error in data.errors) {
		errors += '\n' + error + ' : ' + data.errors[error];
	}
	data.errors = errors;
}
else {
	data.errors = '';
}

return JSON.stringify(data);