/**
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; under version 2
 * of the License (non-upgradable).
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright (c) 2015 (original work) Open Assessment Technologies SA ;
 */
define(['taoClientDiagnostic/tools/stats'], function(stats) {
    'use strict';

    var listValuesArray;
    var listValuesCollectionDataProvider;
    var listValuesObject;
    var listValuesObjectDataProvider;
    var listValuesCollectionCallbackDataProvider;
    var listValuesObjectCallbackDataProvider;

    QUnit.module('API');

    QUnit.test('The tester has the right form', function(assert) {
        assert.ok(typeof stats === 'function', 'The module exposes a function');
    });

    QUnit.module('Test');

    /** Stats from a collection **/
    listValuesArray = [{
        'totalDuration': 64,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 62
    }, {
        'totalDuration': 75,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 73
    }, {
        'totalDuration': 58,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 56
    }, {
        'totalDuration': 64,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 62
    }, {
        'totalDuration': 73,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 71
    }, {
        'totalDuration': 72,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 70
    }, {
        'totalDuration': 52,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 50
    }, {
        'totalDuration': 71,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 69
    }, {
        'totalDuration': 74,
        'networkDuration': 1,
        'requestDuration': 1,
        'displayDuration': 72
    }];

    listValuesCollectionDataProvider = [{
        title: 'min',
        name: 'min',
        input: listValuesArray,
        field: 'displayDuration',
        expected: 50
    }, {
        title: 'max',
        name: 'max',
        input: listValuesArray,
        field: 'displayDuration',
        expected: 73
    }, {
        title: 'sum',
        name: 'sum',
        input: listValuesArray,
        field: 'displayDuration',
        expected: 585
    }, {
        title: 'count',
        name: 'count',
        input: listValuesArray,
        field: 'displayDuration',
        expected: listValuesArray.length
    }, {
        title: 'average',
        name: 'average',
        input: listValuesArray,
        field: 'displayDuration',
        expected: 65
    }, {
        title: 'median',
        name: 'median',
        input: listValuesArray,
        field: 'displayDuration',
        expected: 69.5
    }, {
        title: 'variance',
        name: 'variance',
        input: listValuesArray,
        field: 'displayDuration',
        expected: 8.02
    }, {
        title: 'values',
        name: 'values',
        input: listValuesArray,
        field: 'displayDuration',
        expected: listValuesArray
    }];

    QUnit
        .cases.init(listValuesCollectionDataProvider)
        .test('Stats on a collection', function(data, assert) {
            var results = stats(data.input, data.field);
            var value = results[data.name];
            if ('number' === typeof value) {
                value = Math.round(value * 100) / 100;
            }
            assert.expect(1);
            assert.strictEqual(value, data.expected, 'The value of the result field ' + data.name + ' must be equal to expected value!');
        });

    /** Stats from an object **/
    listValuesObject = {
        'sample0': {
            'totalDuration': 64,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 62
        },
        'sample1': {
            'totalDuration': 75,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 73
        },
        'sample2': {
            'totalDuration': 58,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 56
        },
        'sample3': {
            'totalDuration': 64,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 62
        },
        'sample4': {
            'totalDuration': 73,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 71
        },
        'sample5': {
            'totalDuration': 72,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 70
        },
        'sample6': {
            'totalDuration': 52,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 50
        },
        'sample7': {
            'totalDuration': 71,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 69
        },
        'sample8': {
            'totalDuration': 74,
            'networkDuration': 1,
            'requestDuration': 1,
            'displayDuration': 72
        }
    };

    listValuesObjectDataProvider = [{
        title: 'min',
        name: 'min',
        input: listValuesObject,
        field: 'displayDuration',
        expected: 50
    }, {
        title: 'max',
        name: 'max',
        input: listValuesObject,
        field: 'displayDuration',
        expected: 73
    }, {
        title: 'sum',
        name: 'sum',
        input: listValuesObject,
        field: 'displayDuration',
        expected: 585
    }, {
        title: 'count',
        name: 'count',
        input: listValuesObject,
        field: 'displayDuration',
        expected: 9
    }, {
        title: 'average',
        name: 'average',
        input: listValuesObject,
        field: 'displayDuration',
        expected: 65
    }, {
        title: 'median',
        name: 'median',
        input: listValuesObject,
        field: 'displayDuration',
        expected: 69.5
    }, {
        title: 'variance',
        name: 'variance',
        input: listValuesObject,
        field: 'displayDuration',
        expected: 8.02
    }, {
        title: 'values',
        name: 'values',
        input: listValuesObject,
        field: 'displayDuration',
        expected: listValuesObject
    }];

    QUnit
        .cases.init(listValuesObjectDataProvider)
        .test('Stats on an object', function(data, assert) {
            var results = stats(data.input, data.field);
            var value = results[data.name];
            if ('number' === typeof value) {
                value = Math.round(value * 100) / 100;
            }
            assert.expect(1);
            assert.strictEqual(value, data.expected, 'The value of the result field ' + data.name + ' must be equal to expected value!');
        });

    function getValue(value) {
        return value.displayDuration;
    }

    /** Stats from a collection using a callback **/
    listValuesCollectionCallbackDataProvider = [{
        title: 'min',
        name: 'min',
        input: listValuesArray,
        field: getValue,
        expected: 50
    }, {
        title: 'max',
        name: 'max',
        input: listValuesArray,
        field: getValue,
        expected: 73
    }, {
        title: 'sum',
        name: 'sum',
        input: listValuesArray,
        field: getValue,
        expected: 585
    }, {
        title: 'count',
        name: 'count',
        input: listValuesArray,
        field: getValue,
        expected: listValuesArray.length
    }, {
        title: 'average',
        name: 'average',
        input: listValuesArray,
        field: getValue,
        expected: 65
    }, {
        title: 'median',
        name: 'median',
        input: listValuesArray,
        field: getValue,
        expected: 69.5
    }, {
        title: 'variance',
        name: 'variance',
        input: listValuesArray,
        field: getValue,
        expected: 8.02
    }, {
        title: 'values',
        name: 'values',
        input: listValuesArray,
        field: getValue,
        expected: listValuesArray
    }];

    QUnit
        .cases.init(listValuesCollectionCallbackDataProvider)
        .test('Stats on a collection using a callback', function(data, assert) {
            var results = stats(data.input, data.field);
            var value = results[data.name];
            if ('number' === typeof value) {
                value = Math.round(value * 100) / 100;
            }
            assert.expect(1);
            assert.strictEqual(value, data.expected, 'The value of the result field ' + data.name + ' must be equal to expected value!');
        });

    /** Stats from an object **/
    listValuesObjectCallbackDataProvider = [{
        title: 'min',
        name: 'min',
        input: listValuesObject,
        field: getValue,
        expected: 50
    }, {
        title: 'max',
        name: 'max',
        input: listValuesObject,
        field: getValue,
        expected: 73
    }, {
        title: 'sum',
        name: 'sum',
        input: listValuesObject,
        field: getValue,
        expected: 585
    }, {
        title: 'count',
        name: 'count',
        input: listValuesObject,
        field: getValue,
        expected: 9
    }, {
        title: 'average',
        name: 'average',
        input: listValuesObject,
        field: getValue,
        expected: 65
    }, {
        title: 'median',
        name: 'median',
        input: listValuesObject,
        field: getValue,
        expected: 69.5
    }, {
        title: 'variance',
        name: 'variance',
        input: listValuesObject,
        field: getValue,
        expected: 8.02
    }, {
        title: 'values',
        name: 'values',
        input: listValuesObject,
        field: getValue,
        expected: listValuesObject
    }];

    QUnit
        .cases.init(listValuesObjectCallbackDataProvider)
        .test('Stats on an object using a callback', function(data, assert) {
            var results = stats(data.input, data.field);
            var value = results[data.name];
            if ('number' === typeof value) {
                value = Math.round(value * 100) / 100;
            }
            assert.expect(1);
            assert.strictEqual(value, data.expected, 'The value of the result field ' + data.name + ' must be equal to expected value!');
        });

});