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

function amountToNumber(amount) {
	var number = amount.toString().replace('.', '').replace(',', '.');
	if (number.charAt(0) !== '+' && number.charAt(0) !== '-') {
		number = '-' + number;
	}
	return number;
}

function numberToAmount(number) {
	var amount = number.toFixed(2).toString().replace('.', ',');
	if (amount.charAt(0) !== '-' && amount !== '0,00') {
		amount = "+" + amount;
	}
	return amount;
}

transactionControllers.controller('TransactionListCtrl', [ '$scope', '$routeParams', '$resource', '$q', '$uibModal', '$log', 'Transaction', function($scope, $routeParams, $resource, $q, $uibModal, $log, Transaction) {

	function refreshExpenses() {
		var accountUsers = $resource($scope.account._links.users.href).get();
		accountUsers.$promise.then(function(data) {
			$scope.accountUsers = accountUsers._embedded.users;
			
			// get outstandings (expenses and 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('/api/transactions/search/outstandings', { accountId: $scope.account.id, userId: $scope.accountUsers[i].id, size: 500 }).get();
				promises[i] = resource.$promise;
			}
			
			$q.all(promises).then(function(data) {
				for (i = 0; i < data.length; i++) {
					$scope.accountUsers[i].outstandings = new Array(data[i]._embedded.transactions.length);
					$scope.accountUsers[i].outstandingSum = 0.0;
					
					for (j = 0; j < data[i]._embedded.transactions.length; j++) {
						
						$scope.accountUsers[i].outstandings[j] = new Object();
						
						$scope.accountUsers[i].outstandings[j].date = data[i]._embedded.transactions[j].date;
						$scope.accountUsers[i].outstandings[j].description = data[i]._embedded.transactions[j].description;
						
						$scope.accountUsers[i].outstandings[j].href = data[i]._embedded.transactions[j]._links.self.href;
						$scope.accountUsers[i].outstandings[j].category = data[i]._embedded.transactions[j].category.name;
						
						if ($scope.accountUsers[i].outstandings[j].category === 'Private Entnahme') { // magic strings ftw
							$scope.accountUsers[i].outstandingSum += data[i]._embedded.transactions[j].amount;
							$scope.accountUsers[i].outstandings[j].amount = numberToAmount(data[i]._embedded.transactions[j].amount);
						}
						else {
							$scope.accountUsers[i].outstandingSum -= data[i]._embedded.transactions[j].amount;
							$scope.accountUsers[i].outstandings[j].amount = numberToAmount(-data[i]._embedded.transactions[j].amount);
						}
					}
					
					$scope.accountUsers[i].outstandingAmount = numberToAmount($scope.accountUsers[i].outstandingSum);
				}
			});
		});
	}
	
	$scope.refreshList = function() {
		
		// reset form
		if ($scope.form) {
			$scope.form.$setPristine();
			$scope.form.$setUntouched();
		}
		
		$scope.transaction = {
			amount: undefined,
			date: new Date(),
			creditor: ""
		};
		
		if (typeof $scope.categories !== 'undefined') {
			$scope.transaction.category = $scope.categories[0];
			
			// XXX dirty hack - one day we will have to move that into the database...
			if ($scope.account.name == 'Gemeinschaftskonto') {
				$scope.transaction.category = $scope.categories[3];
			}
		}
		
		$scope.checkCategory();
		
		// get recent transactions
		var transactions = $resource('/api/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;
			
			for (i = 0; i < $scope.transactions.length; i++) {
				$scope.transactions[i].amount = numberToAmount($scope.transactions[i].amount);
			}
		});
		
		refreshExpenses();
	}
	
	$scope.checkCategory = function() {
 		
 		// if this is selected to be a withdrawal, preselect the current user and disable "no creditor" radio button
 		if ($scope.transaction.category.name === 'Private Entnahme') {
 			$scope.transaction.creditor = $scope.userinfo._links.self.href;
 			document.getElementById('noCreditorRadioButton').disabled = true;
 		}
 		else {
 			document.getElementById('noCreditorRadioButton').disabled = false;
 			document.getElementById('noCreditorRadioButton').checked = true;
		}
 	}
	
	$scope.initList = function() {
		$scope.pageSize = 20;
		
		var userinfo = $resource('/user').get();
		userinfo.$promise.then(function(data) {
			$scope.userid = userinfo.name;
			
			userinfo = $resource('/api/users/search/findByUsername', { username: $scope.userid }).get();
			userinfo.$promise.then(function(data) {
				$scope.userinfo = userinfo;
			});
			
			var accountInfo = $resource('/api/accounts/search/findByUserName', { username: $scope.userid }).get();
			accountInfo.$promise.then(function(data) {
				$scope.accounts = accountInfo._embedded.accounts;
				if ($scope.account == undefined) {
					$scope.account = $scope.accounts[0];
					if ($routeParams.account != undefined) {
						for (i = 0; i < $scope.accounts.length; i++) {
							if ($scope.accounts[i].name == $routeParams.account)
								$scope.account = $scope.accounts[i];
						}
					}  
				}
				
				var categories = $resource('/api/categories/search/listForAccount', { accountId: $scope.account.id }).get();
				categories.$promise.then(function(data) {
					$scope.categories = categories._embedded.categories;
					
					// remove retired categories
					for (i = 0; i < $scope.categories.length; i++) {
						if ($scope.categories[i].retired) {
							$scope.categories.splice(i, 1);
							i--;
						}
					}
					
					$scope.refreshList();
				});
			});
		});
	}
	
	$scope.submitTransaction = function() {
		if (document.getElementById('amountInput').value) {
			document.getElementById('transactionSubmit').disabled = true;
			$scope.waitingForSubmission = true;
			
			var newTransaction = new Transaction({
				"account" : $scope.account._links.self.href,
				"amount" : amountToNumber($scope.transaction.amount),
				"date" : $scope.transaction.date,
				"description" : $scope.transaction.description != undefined ? $scope.transaction.description : '',
				"category" : $scope.transaction.category._links.self.href,
				"creditor" : $scope.transaction.creditor
			});
			
			newTransaction.$save(function(transaction) {
				console.log(transaction);
				document.getElementById('transactionSubmit').disabled = false;
				$scope.waitingForSubmission = false;
				$scope.refreshList();
				$scope.lastSubmission = newTransaction;
				$scope.lastSubmission.amount = numberToAmount(newTransaction.amount);
			});
		}
	}
	
	$scope.deleteLastSubmission = function() {
		var testTrns = $resource($scope.lastSubmission._links.self.href).delete(function() {
			$scope.lastSubmission = undefined;
			$scope.refreshList();
		});
	};
	
	$scope.moreTransactions = function() {
		if ($scope.nextPageAvailable) {
			$scope.pageNumber++;
			var transactions = $resource('/api/transactions/search/forAccount', { accountId: $scope.account.id, size: $scope.pageSize, sort: 'date,desc', page: $scope.pageNumber }).get();
			transactions.$promise.then(function(data) {
				for (i = 0; i < transactions._embedded.transactions.length; i++) {
					transactions._embedded.transactions[i].amount = numberToAmount(transactions._embedded.transactions[i].amount);
				}
				
				$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('/api/transactions/search/descriptions', { accountId: $scope.account.id, prefix: val.toLowerCase() }).get();
		return suggestions.$promise.then(function(data) {
			var newSuggestions = new Array();
			var numSuggestions = 0;
			var idx = 0;
			
			while (numSuggestions < 6 && idx < suggestions._embedded.transactions.length) {
				if (newSuggestions.indexOf(suggestions._embedded.transactions[idx].description) < 0) {
					newSuggestions[numSuggestions] = suggestions._embedded.transactions[idx].description;
					numSuggestions++;
				}
				idx++;
			}
			
			return newSuggestions;
		});
	};
	
	$scope.openDetails = function(transaction) {
		var modalInstance = $uibModal.open({
			templateUrl: 'detailsTemplate.html',
			controller: 'DetailsModalCtrl',
			resolve: {
				transactionId: transaction.id,
				categories: function () {
			          return $scope.categories;
			        },
				accountUsers: function () {
			          return $scope.accountUsers;
		        }
			}
		});

		modalInstance.result.then(function(editedTransaction) {
			
			$scope.lastSubmission = undefined;
			
			if (editedTransaction.amount != undefined) {
				transaction.amount = editedTransaction.amount;
				transaction.date = editedTransaction.date;
				transaction.description = editedTransaction.description;
				
				transaction.creditor = $resource(editedTransaction.creditor).get();
				transaction.category = $resource(editedTransaction.category).get();
			}
			else {
				// if the transaction has been deleted, only the ID is returned
				for (i = 0; i < $scope.transactions.length; i++) {
					if ($scope.transactions[i].id == editedTransaction) {
						$scope.transactions.splice(i, 1);
					}
				}
			}
			
			refreshExpenses();
			
		}, function () {
			$log.info('DetailsModal dismissed ' + new Date());
		});
	};
	
	$scope.openOutstandings = function(user) {
		var modalInstance = $uibModal.open({
			templateUrl: 'outstandingsTemplate.html',
			controller: 'OutstandingsModalCtrl',
			resolve: {
				accountUser: user
			}
		});

		modalInstance.result.then(function() {
			$scope.refreshList();
		}, function () {
			$log.info('OutstandingsModal dismissed ' + new Date());
		});
	};
	
	// initialize (http://stackoverflow.com/a/25662066/3761783)
	$scope.initList();

} ]);

transactionControllers.controller('DetailsModalCtrl', [ '$scope', '$resource', '$uibModalInstance', 'Transaction', 'transactionId', 'categories', 'accountUsers', function($scope, $resource, $uibModalInstance, Transaction, transactionId, categories, accountUsers) {
	
	$scope.accountUsers = accountUsers;
	
	var transaction = Transaction.get({ id: transactionId });
	transaction.$promise.then(function(data) {
		transaction.amount = numberToAmount(transaction.amount);
		transaction.date = new Date(transaction.date);
		transaction.creditor = $resource(transaction._links.creditor.href).get();
		transaction.category = $resource(transaction._links.category.href).get();
		
		transaction.category.$promise.then(function(data) {
			$scope.transaction = transaction;
			$scope.categories = categories;
			
			for (i = 0; i < $scope.categories.length; i++) {
				if ($scope.categories[i].name == $scope.transaction.category.name) {
					$scope.transaction.category = $scope.categories[i];
					break;
				}
			}
			
			transaction.creditor.$promise.then(function(data) {
				$scope.transaction.creditor = $scope.transaction.creditor._links.user.href;
			},
			function(error) { // transactions without a creditor return a HTTP 404 error
				$scope.transaction.creditor = "";
			});
		});
		
	});
	
	$scope.ok = function () {
		$scope.transaction.category = $scope.transaction.category._links.self.href;
		$scope.transaction.amount = amountToNumber($scope.transaction.amount);
		$scope.transaction.$update(function(data) {}).then(
				$uibModalInstance.close($scope.transaction)
		);
	};

	$scope.cancel = function () {
		$uibModalInstance.dismiss('cancel');
	};
	
	$scope.deleteTransaction = function() {
		var deletedTransactionId = $scope.transaction.id;
		$resource($scope.transaction._links.self.href).remove().$promise.then(function() {
			$uibModalInstance.close(deletedTransactionId);
		});
	}
} ]);

transactionControllers.controller('OutstandingsModalCtrl', [ '$scope', '$uibModalInstance', '$http', '$resource', '$q', 'accountUser', function($scope, $uibModalInstance, $http, $resource, $q, accountUser) {
	
	$scope.accountUser = accountUser;
	
	$scope.ok = function () {
		$uibModalInstance.close();
	};

	$scope.close = function () {
		$uibModalInstance.dismiss('close');
	};
	
	$scope.clearOutstandings = function() {
		var promises = new Array($scope.accountUser.outstandings.length);
		for (i = 0; i < $scope.accountUser.outstandings.length; i++) {
			if ($scope.accountUser.outstandings[i].category === 'Private Entnahme') {
				// delete withdrawals
				var resource = $resource($scope.accountUser.outstandings[i].href).remove();
				promises[i] = resource.$promise;
			}
			else {
				// remove creditor from expenses
				promises[i] = $http.patch($scope.accountUser.outstandings[i].href, '{ "creditor" : "" }');
			}
		}
		
		$q.all(promises).then(function(data) {
			$uibModalInstance.close('cleared outstandings');
		});
	}
} ]);

transactionControllers.controller('ImportCtrl', [ '$scope', '$resource', '$location', 'ImportService', function($scope, $resource, $location, ImportService) {
	
	$scope.importCSV = function () {
		ImportService.setAccount($scope.account);
		ImportService.setCategories($scope.categories);
		ImportService.setCSV($scope.csvInput);
		$location.path('importList');
	}
	
	$scope.initPage = function () {
		var userinfo = $resource('/user').get();
		userinfo.$promise.then(function(data) {
			$scope.userid = userinfo.name;
			
			userinfo = $resource('/api/users/search/findByUsername', { username: $scope.userid }).get();
			userinfo.$promise.then(function(data) {
				$scope.userinfo = userinfo;
			});
			
			var accountInfo = $resource('/api/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('/api/categories/search/listForAccount', { accountId: $scope.account.id }).get();
				categories.$promise.then(function(data) {
					$scope.categories = categories._embedded.categories;
					
					if ($scope.importForm) {
						$scope.importForm.$setPristine();
						$scope.importForm.$setUntouched();
					}
				});
			});
		});
	}
	
	$scope.initPage();
	
} ]);

transactionControllers.controller('ImportListCtrl', [ '$scope', '$resource', '$location', 'ImportService', 'Transaction', function($scope, $resource, $location, ImportService, Transaction) {
	
	$scope.processCSV = function () {
		$scope.account = ImportService.getAccount();
		$scope.categories = ImportService.getCategories();
		$scope.csvInput = ImportService.getCSV();
		$scope.csv = Papa.parse(ImportService.getCSV()).data;
		
		var matcherData = $resource('/api/matchers/search/listForAccount', { projection: 'full', accountId: $scope.account.id }).get();
		matcherData.$promise.then(function(data) {
			matcherData = matcherData._embedded.matchers;
			$scope.matchers = new Array(matcherData.length);
			
			for (i = 0; i < $scope.matchers.length; i++) {
				$scope.matchers[i] = {};
				
				$scope.matchers[i].id = matcherData[i].id;
				$scope.matchers[i].position = matcherData[i].position;
				
				if (matcherData[i].dateMatcherCode != null) {
					$scope.matchers[i].dateMatcher = new Function('x', matcherData[i].dateMatcherCode);
					$scope.matchers[i].dateMatcherCode = matcherData[i].dateMatcherCode;
				}
				
				if (matcherData[i].typeMatcherCode != null) {
					$scope.matchers[i].typeMatcher = new Function('x', matcherData[i].typeMatcherCode);
					$scope.matchers[i].typeMatcherCode = matcherData[i].typeMatcherCode;
				}
				
				if (matcherData[i].textMatcherCode != null) {
					$scope.matchers[i].textMatcher = new Function('x', matcherData[i].textMatcherCode);
					$scope.matchers[i].textMatcherCode = matcherData[i].textMatcherCode;
				}
				
				if (matcherData[i].amountMatcherCode != null) {
					$scope.matchers[i].amountMatcher = new Function('x', matcherData[i].amountMatcherCode);
					$scope.matchers[i].amountMatcherCode = matcherData[i].amountMatcherCode;
				}
				
				$scope.matchers[i].targetDescription = matcherData[i].targetDescription;
				$scope.matchers[i].targetCategory = matcherData[i].targetCategory;
				
			}
			
			for (i = 0; i < $scope.csv.length; i++) {
				var j = 0;
				
				while (j < $scope.matchers.length) {
					var match = true;
					
					if ($scope.matchers[j].dateMatcher)
						match = $scope.matchers[j].dateMatcher($scope.csv[i][1]);
					if (match && $scope.matchers[j].typeMatcher)
						match = $scope.matchers[j].typeMatcher($scope.csv[i][2]);
					if (match && $scope.matchers[j].textMatcher)
						match = $scope.matchers[j].textMatcher($scope.csv[i][3]);
					if (match && $scope.matchers[j].amountMatcher) 
						match = $scope.matchers[j].amountMatcher($scope.csv[i][4].toString().replace('.', '').replace(',', '.'));
				
					if (match) {
						$scope.csv[i].targetDescription = $scope.matchers[j].targetDescription;
						$scope.csv[i].matcherPosition = $scope.matchers[j].position;
						for (k = 0; k < $scope.categories.length; k++) {
							if ($scope.categories[k].name == $scope.matchers[j].targetCategory.name)
								$scope.csv[i].targetCategory = $scope.categories[k];
						}
						break;
					}

					j++;
				}
			}
		});
	}
	
	$scope.importTransaction = function(line) {
		if (line.targetCategory) {
			
			var newTransaction = new Transaction({
				"account" : $scope.account._links.self.href,
				"amount" : line[4].replace(',', '.'),
				"date" : new Date(line[1].substr(6,4) + "-" + line[1].substr(3,2) + "-" + line[1].substr(0,2)),
				"description" : line.targetDescription != undefined ? line.targetDescription : '',
				"category" : line.targetCategory._links.self.href,
				"creditor" : ""
			});
			
			newTransaction.$save(function(transaction) {
				line.submitted = true;
				console.log(transaction);
				line.submittedTransactionLink = transaction._links.self.href;
				line.submittedTransactionId = transaction.id;
				
				// delete from CSV
				var descriptionPos = $scope.csvInput.search(line[3]);
				var lineStart = $scope.csvInput.lastIndexOf('\n', descriptionPos);
				var lineEnd = $scope.csvInput.indexOf('\n', descriptionPos);
				if (lineEnd < 0)
					lineEnd = $scope.csvInput.length;
				$scope.csvInput = $scope.csvInput.substring(0, lineStart) + $scope.csvInput.substring(lineEnd, $scope.csvInput.length); 

			});
		}
	}
	
} ]);