/*
 * Session details view model
 */
function SessionViewModel(data) {
    //Ensure data is not null
    data = data || new Object();

    this.SessionID = getValue(data.SessionID, null);
    this.UserName = getValue(data.UserName, null);
    this.SessionCreateDT = getValue(data.SessionCreateDT, null);

    this.CurrentRevisionID = getValue(data.CurrentRevisionID, null);
    this.Name = getValue(data.Name, null);
    this.CurrentRevision = getValue(data.CurrentRevision, null);
    this.RevisionCreateDT = getValue(data.RevisionCreateDT, null);

    this.ResultID = getValue(data.ResultID, null);
    this.StatusCode = getValue(data.StatusCode, null);
    this.StatusSuffix = getValue(data.StatusSuffix, null);
    this.StatusUpdateDT = getValue(data.StatusUpdateDT, null);

    this.Criteria = new SearchCriteria(data.Criteria);
}

/*
 * Search filter critia view model
 */
function SearchCriteria(data) {
    //Ensure data is not null
    data = data || new Object();

    this.FilterByPartNumber = getValue(data.FilterByPartNumber, false);
    this.PartNumbers = new Array();
    this.LotNumbers = new Array();
    this.MinimumDT = getValue(data.MinimumDT, null);
    this.MaximumDT = getValue(data.MaximumDT, null);
    this.WorkCenters = new Array();
    this.OperatorIDs = new Array();
    this.ProfitCenters = new Array();
    this.ComponentLotNumbers = new Array();

    if (getValue(data.FilterByLotNumber)) {

    }
}

/*
 * Code/description tuple
 */
function CodedItem(data) {
    //Ensure data is not null
    data = data || new Object();

    this.Code = getValue(data.Code, null);
    this.Description = getValue(data.Description, null);
}

/*
 * Helper method to extract value from data or set default value 
 */
function getValue(obj, defaultValue) {
    if (typeof obj === "undefined") {
        return defaultValue;
    }

    return obj || defaultValue;
}

/*
 * Helper string formatting function
 */
String.prototype.formatUnicorn = String.prototype.formatUnicorn ||
    function () {
        "use strict";
        var str = this.toString();
        if (arguments.length) {
            var t = typeof arguments[0];
            var key;
            var args = ("string" === t || "number" === t) ?
                Array.prototype.slice.call(arguments)
                : arguments[0];

            for (key in args) {
                str = str.replace(new RegExp("\\{" + key + "\\}", "gi"), args[key]);
            }
        }

        return str;
    };

/*
 * Valid combination of input criteria
 */
function ValidCombination(id, name, timespan, workOrder, itemNumber, profitCenter, workCenter, componentLot, operator, itemOperationMis, extractMis) {
    this.ID = id;
    this.Name = name;
    this.Timespan = timespan;
    this.WorkOrder = workOrder;
    this.ItemNumber = itemNumber;
    this.ProfitCenter = profitCenter;
    this.WorkCenter = workCenter;
    this.ComponentLot = componentLot;
    this.Operator = operator;
    this.ItemOperationMis = itemOperationMis;
    this.ExtractMis = extractMis;
}

ValidCombination.prototype = {
    ID: -1,
    Name: "",
    Timespan: false,
    WorkOrder: false,
    ItemNumber: false,
    ProfitCenter: false,
    WorkCenter: false,
    ComponentLot: false,
    Operator: false,
    ItemOperationMis: false,
    ExtractMis: false
};

/*
 * Checks if the filter flags given match those in the valid combination
 */
ValidCombination.prototype.matches = function (timespan, workOrder, itemNumber, profitCenter, workCenter, componentLot, operator, itemOperationMis, extractMis) {
    return this.Timespan === timespan &&
        this.WorkOrder === workOrder &&
        this.ItemNumber === itemNumber &&
        this.ProfitCenter === profitCenter &&
        this.WorkCenter === workCenter &&
        this.ComponentLot === componentLot &&
        this.Operator === operator &&
        this.ItemOperationMis === itemOperationMis &&
        this.ExtractMis === extractMis;
}

/*
 * Helper toString override for logging valid combination
 */
ValidCombination.prototype.toString = function validationCombinationToString() {
    return "{Name}: [Time Span={TimeSpan}, Work Order={WorkOrder}, Item Number={ItemNumber}, Profit Center={ProfitCenter}, Work Center={WorkCenter}, Component Lot={ComponentLot}, Operator={Operator}, Item/Operation/MIS={ItemOperationMis}, Extract MIS={ExtractMis}]".formatUnicorn(this);
}

//Define valid combinations
var validCombinations =
    [
        new ValidCombination(10, "Work Order", false, true, false, false, false, false, false, false, false),
        new ValidCombination(20, "Component Lot", false, false, false, false, false, true, false, false, false),
        new ValidCombination(30, "Time Span + Profit Center", true, false, false, true, false, false, false, false, false),
        new ValidCombination(40, "Time Span + Work Center", true, false, false, false, true, false, false, false, false),
        new ValidCombination(50, "Time Span + Operator", true, false, false, false, false, false, true, false, false),
        new ValidCombination(60, "Time Span + Profit Center + Item Number", true, false, true, true, false, false, false, false, false),
        new ValidCombination(70, "Time Span + Profit Center + Item/Operation/MIS", true, false, false, true, false, false, false, true, false),
        new ValidCombination(80, "Time Span + Profit Center + Work Order + Item/Operation/MIS", true, true, false, true, false, false, false, true, false),
        new ValidCombination(90, "Time Span + Profit Center + Extract MIS", true, false, false, true, false, false, false, false, true),
        new ValidCombination(100, "Time Span + Work Center + Item Number", true, false, true, false, true, false, false, false, false),
        new ValidCombination(110, "Time Span + Work Center + Extract MIS", true, false, false, false, true, false, false, false, true),
        new ValidCombination(120, "Time Span + Work Center + Item/Operation/MIS", true, false, false, false, true, false, false, true, false),
        new ValidCombination(130, "Time Span + Work Center + Work Order + Item/Operation/MIS", true, true, false, false, true, false, false, true, false),
        new ValidCombination(140, "Time Span + Item Number", true, false, true, false, false, false, false, false, false),
        new ValidCombination(150, "Time Span + Work Center + Operator", true, false, false, false, true, false, true, false, false),
        new ValidCombination(160, "Time Span + Profit Center + Operator", true, false, false, true, false, false, true, false, false)
    ];