var transactionControllers = angular.module('transactionControllers', ['ngResource']);

transactionControllers.controller('TransactionListCtrl', [ '$http', '$scope', '$location', '$resource', '$q', function($http, $scope, $location, $resource, $q) {
	
	$scope.refreshList = function() {
		
		console.log('refreshList()');
		
		// reset form
		if ($scope.form) {
			$scope.form.$setPristine();
			$scope.form.$setUntouched();
		}
		
		$scope.transaction = {
			amount: undefined,
			date: new Date()
		};
		
		if (typeof $scope.categories !== 'undefined') {
			$scope.transaction.category = $scope.categories[0];
		}
		
		// get recent transactions
		var transactions = $resource('http://localhost:8080/transactions/search/forAccount', { accountId: $scope.account.id, size: $scope.pageSize, sort: 'date,desc' }).get();
		transactions.$promise.then(function(data) {
			$scope.transactions = transactions._embedded.transactions;
			$scope.nextPageAvailable = (transactions.page.totalPages !== transactions.page.number + 1);
			$scope.prevPageAvailable = (transactions.page.number > 0);
			$scope.pageNumber = transactions.page.number;
		});
		
		var accountUsers = $resource($scope.account._links.users.href).get();
		accountUsers.$promise.then(function(data) {
			$scope.accountUsers = accountUsers._embedded.users;
			
			// initialize attributes for outstanding amounts
			for (i = 0; i < $scope.accountUsers.length; i++) {
				$scope.accountUsers[i].outstandings = 0.0;
			}
			
			// get expenses for all users of the account
			var promises = new Array($scope.accountUsers.length);
			for (i = 0; i < $scope.accountUsers.length; i++) {
				var resource = $resource('/transactions/search/expenses', { accountId: $scope.account.id, userId: $scope.accountUsers[i].id }).get();
				promises[i] = resource.$promise;
			}
			
			$q.all(promises).then(function(data) {
				for (i = 0; i < data.length; i++) {
					var expenseSum = 0;
					for (j = 0; j < data[i]._embedded.transactions.length; j++) {
						expenseSum = expenseSum + data[i]._embedded.transactions[j].amount;
					}
					$scope.accountUsers[i].outstandings -= expenseSum;
					//console.log('Expenses by ' + $scope.accountUsers[i].name + ': ' + expenseSum);
				}
			});
			
			// get withdrawals for all users of the account
			var promises = new Array($scope.accountUsers.length);
			for (i = 0; i < $scope.accountUsers.length; i++) {
				var resource = $resource('/withdrawals/search/forAccount', { accountId: $scope.account.id, userId: $scope.accountUsers[i].id }).get();
				promises[i] = resource.$promise;
			}
			
			$q.all(promises).then(function(data) {
				for (i = 0; i < data.length; i++) {
					var withdrawnSum = 0;
					for (j = 0; j < data[i]._embedded.withdrawals.length; j++) {
						withdrawnSum = withdrawnSum + data[i]._embedded.withdrawals[j].amount;
					}
					$scope.accountUsers[i].outstandings -= withdrawnSum;
					//console.log('Withdrawals by ' + $scope.accountUsers[i].name + ': ' + withdrawnSum);
				}
			});
			
		});
		
		// TODO for some reason this does not work upon reload
		document.getElementsByName('expenseBy')[0].checked = true;
		
	}
	
	$scope.checkCategory = function() {
		
		var radioButtons = document.getElementsByName('expenseBy');
		var userLabels = document.getElementsByClassName('userLabel');
		
		// if this is selected to be a withdrawal, preselect the current user and lock the radio buttons
		if ($scope.transaction.category.id == -1) {
			for (i = 0; i < userLabels.length; i++) {
				console.log(userLabels[i].innerHTML.substr(-$scope.userinfo.name.length-6));
				if (userLabels[i].innerHTML.indexOf($scope.userinfo.name) >= 0) {
					userLabels[i].getElementsByTagName('INPUT')[0].checked = true;
				}
			}
			for (i = 0; i < radioButtons.length; i++) {
				radioButtons[i].disabled = true;
			}
		}
		else {
			for (i = 0; i < radioButtons.length; i++) {
				radioButtons[i].disabled = false;
			}
			radioButtons[0].checked = true;
		}
	}
	
	$scope.initList = function() {
		console.log('initList()');
		
		$scope.pageSize = 20;
		
		var userinfo = $resource('/user').get();
		userinfo.$promise.then(function(data) {
			$scope.userid = userinfo.name;
			
			userinfo = $resource('/users/search/findByUsername', { username: $scope.userid }).get();
			userinfo.$promise.then(function(data) {
				$scope.userinfo = userinfo;
			});
			
			var accountInfo = $resource('/accounts/search/findByUserName', { username: $scope.userid }).get();
			accountInfo.$promise.then(function(data) {
				$scope.accounts = accountInfo._embedded.accounts;
				$scope.account = $scope.accounts[0];
				
				var categories = $resource('/categories/search/listForAccount', { accountId: $scope.accounts[0].id }).get();
				categories.$promise.then(function(data) {
					$scope.categories = categories._embedded.categories;
					
					//$scope.categories.push({id: -1, name: '────────────────', position: 9999, disabled: true});
					$scope.categories.push({id: -1, name: 'private Entnahme', position: 10000, _links: { self: {href: 'withdrawal'}}});
					
					$scope.refreshList();
				});
			});
		});
		
	}
	
	$scope.postTransaction = function() {
		
		var amount = $scope.transaction.amount.replace(',', '.');
		
		if (amount.charAt(0) !== '+' && amount.charAt(0) !== '-') {
			amount = '-' + amount;
		}
		
		// handle withdrawals
		if ($scope.transaction.category._links.self.href === 'withdrawal') {
			if (amount.charAt(0) === '-') {
				amount = amount.substr(1);
			}
			
			var Withdrawal = $resource('/withdrawals');
			
			var newWithdrawal = new Withdrawal({
				"account" : $scope.account._links.self.href,
				"amount" : amount,
				"date" : $scope.transaction.date,
				"user" : $scope.userinfo._links.self.href
			});
			
			newWithdrawal.$save(function(withdrawal) {
				$scope.refreshList();
				$scope.lastSubmission = newWithdrawal;
			});
			
			return;
		}
			
		// via Resource (might be moved into a service)
		var Transaction = $resource('/transactions');
		
		console.log('Creditor:');
		console.log($scope.transaction.creditor);

		var newTransaction = new Transaction({
			"account" : $scope.account._links.self.href,
			"amount" : amount,
			"date" : $scope.transaction.date,
			"description" : $scope.transaction.description,
			"category" : $scope.transaction.category._links.self.href,
			"creditor" : $scope.transaction.creditor
		});
		
		newTransaction.$save(function(transaction) {
			$scope.refreshList();
			$scope.lastSubmission = newTransaction;
		});
		
	};
	
	$scope.deleteLastSubmission = function() {
		console.log($scope.lastSubmission._links.self.href);
		var testTrns = $resource($scope.lastSubmission._links.self.href).delete(function() {
			$scope.lastSubmission = undefined;
			$scope.refreshList();
		});
	};
	
	$scope.showTransaction = function(transaction) {
		$location.path('/transaction/' + transaction._links.self.href);
	};
	
	$scope.moreTransactions = function() {
		if ($scope.nextPageAvailable) {
			$scope.pageNumber++;
			var transactions = $resource('http://localhost:8080/transactions/search/forAccount', { accountId: $scope.account.id, size: $scope.pageSize, sort: 'date,desc', page: $scope.pageNumber }).get();
			transactions.$promise.then(function(data) {
				$scope.transactions = $scope.transactions.concat(transactions._embedded.transactions);
				$scope.nextPageAvailable = (transactions.page.totalPages !== transactions.page.number + 1);
				$scope.prevPageAvailable = (transactions.page.number > 0);
				$scope.pageNumber = transactions.page.number;
			});
		}
	};
	
	$scope.updateSuggestions = function(val) {
		var suggestions = $resource('http://localhost:8080/transactions/search/descriptions', { accountId: $scope.account.id, prefix: val.toLowerCase() }).get();
		return suggestions.$promise.then(function(data) {
			var newSuggestions = new Array(suggestions._embedded.transactions.length);
			for (i = 0; i < suggestions._embedded.transactions.length; i++) {
				newSuggestions[i] = suggestions._embedded.transactions[i].description;
			}
			return newSuggestions;
		});
	};	
	
	// initialize (http://stackoverflow.com/a/25662066/3761783)
	$scope.initList();

} ]);

transactionControllers.controller('TransactionDetailCtrl', [ '$scope', '$routeParams', '$resource', '$location', function($scope, $routeParams, $resource, $location) {
	
	$scope.initDetails = function() {
		console.log('initDetails()');
		
		var transaction = $resource($routeParams.transactionURI).get();
		transaction.$promise.then(function(data) {
			transaction.date = new Date(transaction.date);
			transaction.category = $resource(transaction._links.category.href).get();
			transaction.creditor = $resource(transaction._links.creditor.href).get();
			transaction.account = $resource(transaction._links.account.href).get();
			
		});
		
		$scope.transaction = transaction;
		
		// FIXME
		// TODO The rest of this function is *copied code* from TransactionListCtrl and desperately needs to be moved into a service
		
		var userinfo = $resource('/user').get();
		userinfo.$promise.then(function(data) {
			$scope.userid = userinfo.name;
			
			userinfo = $resource('/users/search/findByUsername', { username: $scope.userid }).get();
			userinfo.$promise.then(function(data) {
				$scope.userinfo = userinfo;
			});
			
			var accountInfo = $resource('/accounts/search/findByUserName', { username: $scope.userid }).get();
			accountInfo.$promise.then(function(data) {
				$scope.accounts = accountInfo._embedded.accounts;
				$scope.account = $scope.accounts[0];
				
				var categories = $resource('/categories/search/listForAccount', { accountId: $scope.accounts[0].id }).get();
				categories.$promise.then(function(data) {
					$scope.categories = categories._embedded.categories;
					
					//$scope.categories.push({id: -1, name: '────────────────', position: 9999, disabled: true});
					$scope.categories.push({id: -1, name: 'private Entnahme', position: 10000, _links: { self: {href: 'withdrawal'}}});
					
					// FIXME Code from TransactionListCtrl.refreshList()
					var accountUsers = $resource($scope.account._links.users.href).get();
					accountUsers.$promise.then(function(data) {
						$scope.accountUsers = accountUsers._embedded.users;
					});
				});
			});
		});
		
	}
	
	$scope.deleteTransaction = function(transaction) {
		/*console.log(angular.toJson(transaction, false));*/
		
		// TODO auf return code reagieren
		$resource(transaction._links.self.href).remove().$promise.then(function() {
			$location.path('/');
		});
	}
	
	$scope.initDetails();

} ]);