var Big = require('big.js');

function getJSONObj(json_input) {
	if (typeof json_input == "string")
		return $.parseJSON(json_input)
	else if (typeof json_input == "object")
		return json_input;

	console.error("Unable to parse json:", json_input);
	return null
}

function User() {
	this.UserId = -1;
	this.Name = "";
	this.Username = "";
	this.Password = "";
	this.Email = "";
}

User.prototype.toJSON = function() {
	var json_obj = {};
	json_obj.UserId = this.UserId;
	json_obj.Name = this.Name;
	json_obj.Username = this.Username;
	json_obj.Password = this.Password;
	json_obj.Email = this.Email;
	return JSON.stringify(json_obj);
}

User.prototype.fromJSON = function(json_input) {
	var json_obj = getJSONObj(json_input);

	if (json_obj.hasOwnProperty("UserId"))
		this.UserId = json_obj.UserId;
	if (json_obj.hasOwnProperty("Name"))
		this.Name = json_obj.Name;
	if (json_obj.hasOwnProperty("Username"))
		this.Username = json_obj.Username;
	if (json_obj.hasOwnProperty("Password"))
		this.Password = json_obj.Password;
	if (json_obj.hasOwnProperty("Email"))
		this.Email = json_obj.Email;
}

User.prototype.isUser = function() {
	var empty_user = new User();
	return this.UserId != empty_user.UserId ||
		this.Username != empty_user.Username;
}

function Session() {
	this.SessionId = -1;
	this.UserId = -1;
}

Session.prototype.toJSON = function() {
	var json_obj = {};
	json_obj.SessionId = this.SessionId;
	json_obj.UserId = this.UserId;
	return JSON.stringify(json_obj);
}

Session.prototype.fromJSON = function(json_input) {
	var json_obj = getJSONObj(json_input);

	if (json_obj.hasOwnProperty("SessionId"))
		this.SessionId = json_obj.SessionId;
	if (json_obj.hasOwnProperty("UserId"))
		this.UserId = json_obj.UserId;
}

Session.prototype.isSession = function() {
	var empty_session = new Session();
	return this.SessionId != empty_session.SessionId ||
		this.UserId != empty_session.UserId;
}

const SecurityType = {
	Currency: 1,
	Stock: 2
}
var SecurityTypeList = [];
for (var type in SecurityType) {
	if (SecurityType.hasOwnProperty(type)) {
		SecurityTypeList.push({'TypeId': SecurityType[type], 'Name': type});
   }
}

function Security() {
	this.SecurityId = -1;
	this.Name = "";
	this.Symbol = "";
	this.Precision = -1;
	this.Type = -1;
}

Security.prototype.toJSON = function() {
	var json_obj = {};
	json_obj.SecurityId = this.SecurityId;
	json_obj.Name = this.Name;
	json_obj.Symbol = this.Symbol;
	json_obj.Precision = this.Precision;
	json_obj.Type = this.Type;
	return JSON.stringify(json_obj);
}

Security.prototype.fromJSON = function(json_input) {
	var json_obj = getJSONObj(json_input);

	if (json_obj.hasOwnProperty("SecurityId"))
		this.SecurityId = json_obj.SecurityId;
	if (json_obj.hasOwnProperty("Name"))
		this.Name = json_obj.Name;
	if (json_obj.hasOwnProperty("Symbol"))
		this.Symbol = json_obj.Symbol;
	if (json_obj.hasOwnProperty("Precision"))
		this.Precision = json_obj.Precision;
	if (json_obj.hasOwnProperty("Type"))
		this.Type = json_obj.Type;
}

Security.prototype.isSecurity = function() {
	var empty_account = new Security();
	return this.SecurityId != empty_account.SecurityId ||
		this.Type != empty_account.Type;
}

const AccountType = {
	Bank: 1,
	Cash: 2,
	Asset: 3,
	Liability: 4,
	Investment: 5,
	Income: 6,
	Expense: 7,
	Trading: 8,
	Equity: 9,
	Receivable: 10,
	Payable: 11
}
var AccountTypeList = [];
for (var type in AccountType) {
	if (AccountType.hasOwnProperty(type)) {
		AccountTypeList.push({'TypeId': AccountType[type], 'Name': type});
   }
}

function Account() {
	this.AccountId = -1;
	this.UserId = -1;
	this.SecurityId = -1;
	this.ParentAccountId = -1;
	this.Type = -1;
	this.Name = "";
	this.Children = []; // Not sent across JSON, just used internally
}

Account.prototype.toJSON = function() {
	var json_obj = {};
	json_obj.AccountId = this.AccountId;
	json_obj.UserId = this.UserId;
	json_obj.SecurityId = this.SecurityId;
	json_obj.ParentAccountId = this.ParentAccountId;
	json_obj.Type = this.Type;
	json_obj.Name = this.Name;
	return JSON.stringify(json_obj);
}

Account.prototype.fromJSON = function(json_input) {
	var json_obj = getJSONObj(json_input);

	if (json_obj.hasOwnProperty("AccountId"))
		this.AccountId = json_obj.AccountId;
	if (json_obj.hasOwnProperty("UserId"))
		this.UserId = json_obj.UserId;
	if (json_obj.hasOwnProperty("SecurityId"))
		this.SecurityId = json_obj.SecurityId;
	if (json_obj.hasOwnProperty("ParentAccountId"))
		this.ParentAccountId = json_obj.ParentAccountId;
	if (json_obj.hasOwnProperty("Type"))
		this.Type = json_obj.Type;
	if (json_obj.hasOwnProperty("Name"))
		this.Name = json_obj.Name;
}

Account.prototype.isAccount = function() {
	var empty_account = new Account();
	return this.AccountId != empty_account.AccountId ||
		this.UserId != empty_account.UserId;
}

Account.prototype.isRootAccount = function() {
	var empty_account = new Account();
	return this.ParentAccountId == empty_account.ParentAccountId;
}

function Split() {
	this.SplitId = -1;
	this.TransactionId = -1;
	this.AccountId = -1;
	this.SecurityId = -1;
	this.Number = "";
	this.Memo = "";
	this.Amount = new Big(0.0);
	this.Debit = false;
}

Split.prototype.toJSONobj = function() {
	var json_obj = {};
	json_obj.SplitId = this.SplitId;
	json_obj.TransactionId = this.TransactionId;
	json_obj.AccountId = this.AccountId;
	json_obj.SecurityId = this.SecurityId;
	json_obj.Number = this.Number;
	json_obj.Memo = this.Memo;
	json_obj.Amount = this.Amount.toFixed();
	json_obj.Debit = this.Debit;
	return json_obj;
}

Split.prototype.fromJSONobj = function(json_obj) {
	if (json_obj.hasOwnProperty("SplitId"))
		this.SplitId = json_obj.SplitId;
	if (json_obj.hasOwnProperty("TransactionId"))
		this.TransactionId = json_obj.TransactionId;
	if (json_obj.hasOwnProperty("AccountId"))
		this.AccountId = json_obj.AccountId;
	if (json_obj.hasOwnProperty("SecurityId"))
		this.SecurityId = json_obj.SecurityId;
	if (json_obj.hasOwnProperty("Number"))
		this.Number = json_obj.Number;
	if (json_obj.hasOwnProperty("Memo"))
		this.Memo = json_obj.Memo;
	if (json_obj.hasOwnProperty("Amount"))
		this.Amount = new Big(json_obj.Amount);
	if (json_obj.hasOwnProperty("Debit"))
		this.Debit = json_obj.Debit;
}

Split.prototype.isSplit = function() {
	var empty_split = new Split();
	return this.SplitId != empty_split.SplitId ||
		this.TransactionId != empty_split.TransactionId ||
		this.AccountId != empty_split.AccountId ||
		this.SecurityId != empty_split.SecurityId;
}

const TransactionStatus = {
	Imported: 1,
	Entered: 2,
	Cleared: 3,
	Reconciled: 4,
	Voided: 5
}
var TransactionStatusList = [];
for (var type in TransactionStatus) {
	if (TransactionStatus.hasOwnProperty(type)) {
		TransactionStatusList.push({'StatusId': TransactionStatus[type], 'Name': type});
   }
}
var TransactionStatusMap = {};
for (var status in TransactionStatus) {
	if (TransactionStatus.hasOwnProperty(status)) {
		TransactionStatusMap[TransactionStatus[status]] = status;
   }
}

function Transaction() {
	this.TransactionId = -1;
	this.UserId = -1;
	this.Description = "";
	this.Status = -1;
	this.Date = new Date();
	this.Splits = [];
}

Transaction.prototype.toJSON = function() {
	var json_obj = {};
	json_obj.TransactionId = this.TransactionId;
	json_obj.UserId = this.UserId;
	json_obj.Description = this.Description;
	json_obj.Status = this.Status;
	json_obj.Date = this.Date.toJSON();
	json_obj.Splits = [];
	for (var i = 0; i < this.Splits.length; i++)
		json_obj.Splits.push(this.Splits[i].toJSONobj());
	return JSON.stringify(json_obj);
}

Transaction.prototype.fromJSON = function(json_input) {
	var json_obj = getJSONObj(json_input);

	if (json_obj.hasOwnProperty("TransactionId"))
		this.TransactionId = json_obj.TransactionId;
	if (json_obj.hasOwnProperty("UserId"))
		this.UserId = json_obj.UserId;
	if (json_obj.hasOwnProperty("Description"))
		this.Description = json_obj.Description;
	if (json_obj.hasOwnProperty("Status"))
		this.Status = json_obj.Status;
	if (json_obj.hasOwnProperty("Date")) {
		this.Date = json_obj.Date
		if (typeof this.Date === 'string') {
			var t = Date.parse(this.Date);
			if (t)
				this.Date = new Date(t);
			else
				this.Date = new Date(0);
		} else
			this.Date = new Date(0);
	}
	if (json_obj.hasOwnProperty("Splits")) {
		for (var i = 0; i < json_obj.Splits.length; i++) {
			var s = new Split();
			s.fromJSONobj(json_obj.Splits[i]);
			this.Splits.push(s);
		}
	}
}

Transaction.prototype.isTransaction = function() {
	var empty_transaction = new Transaction();
	return this.TransactionId != empty_transaction.TransactionId ||
		this.UserId != empty_transaction.UserId;
}

Transaction.prototype.deepCopy = function() {
	var t = new Transaction();
	t.fromJSON(this.toJSON());
	return t;
}

Transaction.prototype.imbalancedSplitSecurities = function(account_map) {
	// Return a list of SecurityIDs for those securities that aren't balanced
	// in this transaction's splits. If a split's AccountId is invalid, that
	// split is ignored, so those must be checked elsewhere
	var splitBalances = {};
	const emptySplit = new Split();
	for (var i = 0; i < this.Splits.length; i++) {
		split = this.Splits[i];
		var securityId = -1;
		if (split.AccountId != emptySplit.AccountId) {
			securityId = account_map[split.AccountId].SecurityId;
		} else if (split.SecurityId != emptySplit.SecurityId) {
			securityId = split.SecurityId;
		} else {
			continue;
		}
		if (securityId in splitBalances) {
			splitBalances[securityId] = split.Amount.plus(splitBalances[securityId]);
		} else {
			splitBalances[securityId] = split.Amount.plus(0);
		}
	}
	var imbalancedIDs = [];
	for (var id in splitBalances) {
		if (!splitBalances[id].eq(0)) {
			imbalancedIDs.push(id);
		}
	}
	return imbalancedIDs;
}

function Error() {
	this.ErrorId = -1;
	this.ErrorString = "";
}

Error.prototype.toJSON = function() {
	var json_obj = {};
	json_obj.ErrorId = this.ErrorId;
	json_obj.ErrorString = this.ErrorString;
	return JSON.stringify(json_obj);
}

Error.prototype.fromJSON = function(json_input) {
	var json_obj = getJSONObj(json_input);

	if (json_obj.hasOwnProperty("ErrorId"))
		this.ErrorId = json_obj.ErrorId;
	if (json_obj.hasOwnProperty("ErrorString"))
		this.ErrorString = json_obj.ErrorString;
}

Error.prototype.isError = function() {
	var empty_error = new Error();
	return this.ErrorId != empty_error.ErrorId ||
		this.ErrorString != empty_error.ErrorString;
}

module.exports = models = {

	// Classes
	User: User,
	Session: Session,
	Security: Security,
	Account: Account,
	Split: Split,
	Transaction: Transaction,
	Error: Error,

	// Enums, Lists
	AccountType: AccountType,
	AccountTypeList: AccountTypeList,
	SecurityType: SecurityType,
	SecurityTypeList: SecurityTypeList,
	TransactionStatus: TransactionStatus,
	TransactionStatusList: TransactionStatusList,
	TransactionStatusMap: TransactionStatusMap,

	// Constants
	BogusPassword: "password"
};