// vim: set tw=80 ts=4 sw=4 sts=4:
/*
    This file is part of Accountant.

    Accountant is free software: you can redistribute it and/or modify
    it under the terms of the GNU Affero General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    Accountant is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Affero General Public License for more details.

    You should have received a copy of the GNU Affero General Public License
    along with Accountant.  If not, see <http://www.gnu.org/licenses/>.
 */
/* jshint node: true */
'use strict';

var moment     = require('moment'),
    Highcharts = require('highstock-release');

var angular = require('angular');

require('../views/operation.form.tmpl.html');

var ngResource       = require('angular-resource'),
    ngMessages       = require('angular-messages'),
    ngUiNotification = require('angular-ui-notification'),
    ngBootbox        = require('ngbootbox'),
    ngStrap          = require('angular-strap');

// Note: ngBootbox seems to have no module.exports.
ngBootbox = 'ngBootbox';

var accountModule = require('./accounts');

var operationModule = angular.module('accountant.operations', [
    accountModule.name,
    ngResource,
    ngMessages,
    ngUiNotification,
    ngBootbox,
    ngStrap
])

.config(function($resourceProvider) {
    // Keep trailing slashes to avoid redirect by flask..
    $resourceProvider.defaults.stripTrailingSlashes = false;
})

.factory('Operation', function($resource) {
    return $resource(
        '/api/operation/:id', {
            id: '@id'
        }
    );
})

.factory('OHLC', function($resource, $routeParams) {
    return $resource(
        '/api/account/:account_id/ohlc', {
            // eslint-disable-next-line camelcase
            account_id: $routeParams.accountId
        }
    );
})

.factory('Category', function($resource, $routeParams) {
    return $resource(
        '/api/account/:account_id/category', {
            // eslint-disable-next-line camelcase
            account_id: $routeParams.accountId
        }
    );
})

.factory('Balance', function($resource, $routeParams) {
    return $resource(
        '/api/account/:account_id/balance', {
            // eslint-disable-next-line camelcase
            account_id: $routeParams.accountId
        }
    );
})

/*
 * Controller for category chart.
 */
.controller('CategoryChartController',
    function($rootScope, Category, Balance) {
        var vm = this;

        var colors = Highcharts.getOptions().colors;
        vm.revenueColor = colors[2];
        vm.expenseColor = colors[3];

        // Configure pie chart for categories.
        vm.config = {
            options: {
                chart: {
                    type: 'pie',
                    animation: {
                        duration: 500
                    }
                },
                plotOptions: {
                    pie: {
                        startAngle: -90
                    },
                    series: {
                        allowPointSelect: 0
                    }
                },
                tooltip: {
                    valueDecimals: 2,
                    valueSuffix: '€'
                }
            },
            yAxis: {
                title: {
                    text: 'Categories'
                }
            },
            title: {
                text: 'Répartition dépenses/recettes'
            },
            series: [{
                name: 'Value',
                data: [],
                innerSize: '33%',
                size: '60%',
                dataLabels: {
                    formatter: function() {
                        // eslint-disable-next-line angular/controller-as-vm
                        return this.point.name;
                    },
                    distance: -40
                }
            }, {
                name: 'Value',
                data: [],
                innerSize: '66%',
                size: '60%',
                dataLabels: {
                    formatter: function() {
                        // eslint-disable-next-line angular/controller-as-vm
                        if (this.point.name !== null && this.percentage >= 2.5) {
                            // eslint-disable-next-line angular/controller-as-vm
                            return this.point.name;
                        }

                        return null;
                    }
                }
            }]
        };

        vm.brightenColor = function(color) {
            var brightness = 0.2;

            // eslint-disable-next-line new-cap
            return Highcharts.Color(color).brighten(brightness).get();
        };

        // Load categories, mainly to populate the pie chart.
        vm.load = function(begin, end) {
            vm.config.loading = true;

            Category.query({
                begin: begin.format('YYYY-MM-DD'),
                end: end.format('YYYY-MM-DD')
            }, function(data) {
                var expenses = [];
                var revenues = [];

                var expenseColor = vm.brightenColor(vm.expenseColor);
                var revenueColor = vm.brightenColor(vm.revenueColor);

                angular.forEach(angular.fromJson(data), function(category) {
                    expenses.push({
                        name: category.category,
                        y: -category.expenses,
                        color: expenseColor
                    });

                    revenues.push({
                        name: category.category,
                        y: category.revenues,
                        color: revenueColor
                    });
                });

                // Note: expenses and revenues must be in the same order than in series[0].
                vm.config.series[1].data = revenues.concat(expenses);

                vm.config.loading = false;
            });
        };

        /*
         * Get account balance.
         */
        vm.getBalance = function(begin, end) {
            Balance.get({
                begin: begin.format('YYYY-MM-DD'),
                end: end.format('YYYY-MM-DD')
            }, function(balance) {
                // Update pie chart subtitle with Balance.
                vm.config.subtitle = {
                    text: 'Balance: ' + balance.balance
                };

                vm.config.series[0].data = [{
                    name: 'Revenues',
                    y: balance.revenues,
                    color: vm.revenueColor
                }, {
                    name: 'Expenses',
                    y: -balance.expenses,
                    color: vm.expenseColor
                }];
            });
        };

        // Reload categories and account status on range selection.
        vm.onRangeSelected = $rootScope.$on('rangeSelectedEvent', function(e, args) {
            vm.load(args.begin, args.end);
            vm.getBalance(args.begin, args.end);
        });

        $rootScope.$on('$destroy', function(){
            vm.onRangeSelected = angular.noop();
        });
    }
)

/*
 * Controller for the sold chart.
 */
.controller('SoldChartController', function($rootScope, $scope, OHLC) {
    var vm = this;

    // Configure chart for operations.
    vm.config = {
        options: {
            chart: {
                zoomType: 'x'
            },
            rangeSelector: {
                buttons: [{
                    type: 'month',
                    count: 1,
                    text: '1m'
                }, {
                    type: 'month',
                    count: 3,
                    text: '3m'
                }, {
                    type: 'month',
                    count: 6,
                    text: '6m'
                }, {
                    type: 'year',
                    count: 1,
                    text: '1y'
                }, {
                    type: 'all',
                    text: 'All'
                }],
                selected: 0
            },
            navigator: {
                enabled: true
            },
            tooltip: {
                crosshairs: true,
                shared: true,
                valueDecimals: 2,
                valueSuffix: '€'
            },
            scrollbar: {
                liveRedraw: false
            }
        },
        series: [{
            type: 'ohlc',
            name: 'Sold',
            data: [],
            dataGrouping: {
                units: [[
                    'week', // unit name
                    [1] // allowed multiples
                ], [
                    'month',
                    [1, 2, 3, 4, 6]
                ]]
            }
        }],
        title: {
            text: 'Sold evolution'
        },
        xAxis: {
            type: 'datetime',
            dateTimeLabelFormats: {
                month: '%e. %b',
                year: '%Y'
            },
            minRange: 3600 * 1000 * 24 * 14, // 2 weeks
            events: {
                afterSetExtremes: function(e) {
                    $scope.$emit('rangeSelectedEvent', {
                        begin: moment.utc(e.min), end: moment.utc(e.max)
                    });
                }
            },
            currentMin: moment.utc().startOf('month'),
            currentMax: moment.utc().endOf('month')
        },
        yAxis: {
            plotLines: [{
                color: 'orange',
                width: 2,
                value: 0.0
            }, {
                color: 'red',
                width: 2,
                value: 0.0
            }]
        },
        useHighStocks: true
    };

    vm.loadSolds = function() {
        vm.config.loading = true;

        OHLC.query({}, function(data) {
            vm.config.series[0].data = [];

            angular.forEach(data, function(operation) {
                vm.config.series[0].data.push([
                    moment.utc(operation.operation_date).valueOf(),
                    operation.open, operation.high, operation.low, operation.close
                ]);
            });

            $scope.$emit('rangeSelectedEvent', {
                begin: vm.config.xAxis.currentMin,
                end: vm.config.xAxis.currentMax
            });

            vm.config.loading = false;
        });
    };

    // Reload solds when an operation is saved.
    vm.onOperationSaved = $rootScope.$on('operationSavedEvent', function() {
        vm.loadSolds();
    });

    // Reload solds when an operation is deleted.
    vm.onOperationDeleted = $rootScope.$on('operationDeletedEvent', function() {
        vm.loadSolds();
    });

    // Update authorized overdraft on account loading.
    vm.onAccountLoaded = $rootScope.$on('accountLoadedEvent', function(e, account) {
        vm.config.yAxis.plotLines[1].value = account.authorized_overdraft;
    });

    $rootScope.$on('$destroy', function() {
        vm.onOperationSaved = angular.noop();
        vm.onOperationDeleted = angular.noop();
        vm.onAccountLoaded = angular.noop();
    });

    // Select beginning and end of month.
    vm.loadSolds();
})

/*
 * Controller for the operations.
 */
.controller('OperationController', function($rootScope, $scope, $routeParams, $ngBootbox, Notification, Account, Operation) {
    var vm = this;

    // List of operations.
    vm.operations = [];

    /*
     * Add an empty operation.
     */
    vm.add = function() {
        var operation = new Operation({
            // eslint-disable-next-line camelcase
            account_id: $routeParams.accountId
        });

        vm.operations.splice(0, 0, operation);
    };

    /*
     * Load operations.
     */
    vm.load = function(begin, end) {
        vm.operations = Operation.query({
            // eslint-disable-next-line camelcase
            account_id: $routeParams.accountId,
            begin: begin.format('YYYY-MM-DD'),
            end: end.format('YYYY-MM-DD')
        });
    };

    /*
     * Cancel edition.
     */
    vm.cancelEdit = function(operation, rowform, $index) {
        if (operation.id) {
            rowform.$cancel();
        } else {
            vm.operations.splice($index, 1);
        }
    };

    /*
     * Toggle pointed indicator for an operation.
     */
    vm.togglePointed = function(operation, rowform) {
        operation.pointed = !operation.pointed;

        // Save operation if not editing it.
        if (!rowform.$visible) {
            vm.save(operation);
        }
    };

    /*
     * Toggle cancel indicator for an operation.
     */
    vm.toggleCanceled = function(operation) {
        operation.canceled = !operation.canceled;

        vm.save(operation);
    };

    /*
     * Save an operation and emit operationSavedEvent.
     */
    vm.save = function($data, $index) {
        // Check if $data is already a resource.
        var operation;

        if ($data.$save) {
            operation = $data;
        } else {
            operation = vm.operations[$index];
            operation = angular.merge(operation, $data);
        }

        operation.confirmed = true;

        return operation.$save().then(function(data) {
            Notification.success('Operation #' + data.id + ' saved.');

            $scope.$emit('operationSavedEvent', data);
        });
    };

    /*
     * Delete an operation and emit operationDeletedEvent.
     */
    vm.delete = function(operation, $index) {
        var id = operation.id;

        $ngBootbox.confirm(
            'Voulez-vous supprimer l\'opération \\\'' + operation.label + '\\\' ?',
            function(result) {
                if (result) {
                    operation.$delete().then(function() {
                        Notification.success('Operation #' + id + ' deleted.');

                        // Remove operation from array.
                        vm.operation.splice($index, 1);

                        $scope.$emit('operationDeletedEvent', operation);
                    });
                }
            }
        );
    };

    vm.account = Account.get({
        id: $routeParams.accountId
    });

    /*
     * Reload operations on rangeSelectedEvent.
     */
    vm.onRangeSelected = $rootScope.$on('rangeSelectedEvent', function(e, args) {
        vm.load(args.begin, args.end);
    });

    $rootScope.$on('$destroy', function() {
        vm.onRangeSelected = angular.noop;
    });
})

.directive('operationFormDialog', function($log, $ngBootbox) {
    return {
        restrict: 'A',
        scope: {
            operation: '=ngModel'
        },
        link: function(scope, element) {
            var title = 'Operation';

            if (scope.operation && scope.operation.id) {
                title = title + ' #' + scope.operation.id;
            }

            scope.form = {};

            element.on('click', function() {
                scope.data = {};
                angular.copy(scope.operation, scope.data);

                // Open dialog with form.
                $ngBootbox.customDialog({
                    scope: scope,
                    title: title,
                    templateUrl: '/views/operation.form.tmpl.html',
                    onEscape: true,
                    buttons: {
                        save: {
                            label: 'Save',
                            className: 'btn-success',
                            callback: function() {
                                // Validate form
                                $log.log(scope.form);

                                // Save operation
                                $log.log(scope.operation);

                                // TODO Alexis Lahouze 2016-05-24 Save operation, handle return.
                                return false;
                            }
                        },
                        cancel: {
                            label: 'Cancel',
                            className: 'btn-default',
                            callback: true
                        }
                    }
                });
            });
        }
    };
});

module.exports = operationModule;