/**
 * Resets all the form controls in the given container.
 * Depending on the provided mode value, this will either 'reset' their values to those shown when the
 * page was first displayed, or 'clear' the values completely.
 * @param container {Group_Name} The HTML container whose form controls should be processed.
 * @param mode {string} (optional) Indicates which type of reset should apply.
 * Either 'reset' (default) or 'clear'.
 * 'reset' will put the previous values from when the page was loaded including defaults.
 * 'clear' will remove all the values.
 *
 * @author Hyfinity Limited
 */
hyf.util.resetContainer = function(container, mode)
{
    if (typeof(container) == 'string')
        container = document.getElementById(container);
    if ((container == null) || (typeof(container) == 'undefined'))
        return;
    if ((typeof(mode) == 'undefined') || ((mode != 'reset') && (mode != 'clear')))
       mode = 'reset';

    var controls = new Array();
    var inputs = container.getElementsByTagName('input');
    for (var i = 0; i < inputs.length; ++i)
        controls[controls.length] = inputs[i];
    inputs = container.getElementsByTagName('select');
    for (var i = 0; i < inputs.length; ++i)
        controls[controls.length] = inputs[i];
    inputs = container.getElementsByTagName('textarea');
    for (var i = 0; i < inputs.length; ++i)
        controls[controls.length] = inputs[i];

    //for radio and multicheck type controls, we will have multiple entries in the
    //controls array so store the values to set in this object to process at the end.
    //ach entry in this object will map control name to an array of values
    var objMultiPartControls = new Object();
    for (var i = 0; i < controls.length; ++i)
    {
        //look at the type of input
        if (mode == 'clear')
        {
            switch (controls[i].type)
            {
                case 'image'    :   break;
                case 'button'   :   break;
                case 'reset'    :   break;
                case 'submit'   :   break;
                case 'file'     :   hyf.util.setFieldValue(controls[i].id, "");
                                    break;
                case 'hidden'   :   break;
                case 'select-one':  //want select one control to default to the first value?
                                    hyf.util.setFieldValue(controls[i].id, controls[i].options[0].value);
                                    break;
                case 'select-multiple': hyf.util.setFieldValue(controls[i].id, null);
                                        break;
                case 'radio'    :
                case 'checkbox' :   objMultiPartControls[controls[i].name] = [""];
                                    break;
                default         :   hyf.util.setFieldValue(controls[i].id, "");
            }
        }
        else
        {
            switch (controls[i].type)
            {
                case 'image'    :   break;
                case 'button'   :   break;
                case 'reset'    :   break;
                case 'submit'   :   break;
                case 'file'     :   hyf.util.setFieldValue(controls[i].id, "");
                                    break;
                case 'hidden'   :   break;
                case 'select-one':  var selected = controls[i].options[0].value; //reset to first entry if no other one was selected
                                    for (var op = 0; op < controls[i].options.length; ++op)
                                    {
                                        if (controls[i].options[op].defaultSelected)
                                            selected = controls[i].options[op].value;
                                    }
                                    hyf.util.setFieldValue(controls[i].id, selected);
                                    break;
                case 'select-multiple':
                                    //clear out all current selections
                                    hyf.util.setFieldValue(controls[i].id, null);
                                    //select any entries that were default selected
                                    for (var op = 0; op < controls[i].options.length; ++op)
                                    {
                                        if (controls[i].options[op].defaultSelected)
                                            hyf.util.setFieldValue(controls[i].id, controls[i].options[op].value);
                                    }
                                    break;
                case 'radio'    :
                case 'checkbox' :   if (!objMultiPartControls[controls[i].name])
                                        objMultiPartControls[controls[i].name] = [];
                                    if (controls[i].defaultChecked)
                                        objMultiPartControls[controls[i].name].push(controls[i].value);
                                    break;
                default         :   hyf.util.setFieldValue(controls[i].id, controls[i].defaultValue);
            }
        }
    }

    //now handle any multiple input control (eg radio or multi check)
    for (var entry in objMultiPartControls)
    {
        //clear out all existing values
        hyf.util.setFieldValue(entry, null);

        //if resetting, then set the requiored values
        if (mode == 'reset')
        {
            for (var i = 0; i < objMultiPartControls[entry].length; ++i)
            {
                hyf.util.setFieldValue(entry, objMultiPartControls[entry][i]);
            }
        }
    }
}


/**
 * Attempts to set the current value for the given field.
 * This will attempt to determine the type of the given field name,
 * by checking dojo widigets, the form elements collection, and
 * display only containers with the given id.
 * If the field supports multiple selections, then the provided value will be
 * added in addition to any others. Use a value of null to clear all values for the control.
 * @param fieldName {Field_Name} The name of the field to set the value for.
 * @param fieldValue {Field_Value | string} The value to set the field with.
 *
 * @author Hyfinity Limited
 */
hyf.util.setFieldValue = function(fieldName, fieldValue)
{
    //first check for a dojo widget
    if ((typeof(dijit) != 'undefined') && (typeof(dijit.byId) == 'function') && (dijit.byId(fieldName) != null))
    {
        return dijit.byId(fieldName).set('value', fieldValue);
    }

    //check for form controls
    var nameMatches = dojo.query('*[name=' + fieldName + ']');
    if (nameMatches.length > 0)
    {
        var controlFound = true;
        var valueToSet = hyf.util.processDateConstantsForField(fieldValue, nameMatches[0]);

        if (nameMatches.length == 1)
        {
            var entry = nameMatches[0];
            if ((typeof(entry.type) == 'undefined') || (entry.type == ''))
            {
                //not actually a field control
                controlFound = false;
            }
            else
            {
                if (entry.type == 'select-multiple')
                { //for multi select we need to find the matching option to select
                    for (var i = 0; i < entry.options.length; ++i)
                    {
                        if (entry.options[i].value == valueToSet)
                            entry.options[i].selected = true;
                        else if (valueToSet == null)
                            entry.options[i].selected = false;

                    }
                }
                else if (entry.type == 'checkbox')
                { //for single checkbox, we need to adjust the checked proeprty
                    if (entry.value == valueToSet)
                        entry.checked = true;
                    else
                        entry.checked = false;
                }
                else
                {
                    if (entry.getAttribute('_type') == 'date')
                    {
                        //convert provided value to the correct display format
                        if (entry.getAttribute('_display_date_format') && entry.getAttribute('_data_date_format') && (entry.getAttribute('_display_date_format') != entry.getAttribute('_data_date_format')))
                        {
                            valueToSet = convertDate(valueToSet, entry.getAttribute('_data_date_format'), entry.getAttribute('_display_date_format'));
                        }
                    }

                    entry.value = valueToSet;
                    //check for any masking requirements
                    hyf.validation.applyMask(entry);

                    //if this is a rich text editor, then make sure the editor gets notified of the changes
                    if ((entry.type == 'textarea') && hyf.richtext && hyf.richtext.isRichText(entry))
                        hyf.richtext.refreshEditorValue(entry);
                }

                hyf.fireEvent(entry, 'change');
            }
        }
        else  //is an array of controls, eg radio or multi check.
        {
            for (var i = 0; i < nameMatches.length; ++i)
            {
                var initialState = nameMatches[i].checked;
                if (nameMatches[i].value == valueToSet) {
                    nameMatches[i].checked = true;
                    if (initialState == false) {
                        hyf.fireEvent(nameMatches[i], 'click');
                        hyf.fireEvent(nameMatches[i], 'change');
                    }
                } else if (valueToSet == null) {
                    nameMatches[i].checked = false;
                    if (initialState == true) {
                        hyf.fireEvent(nameMatches[i], 'click');
                        hyf.fireEvent(nameMatches[i], 'change');
                    }
                }
            }
        }
        if (controlFound)
            return;
    }

    //finally check for an id
    if (document.getElementById(fieldName) != null)
    {
        //set the text contents of the container.
        var cont = document.getElementById(fieldName);

        var valueToSet = hyf.util.processDateConstantsForField(fieldValue, cont);

        //if the container has existing text node children then we just update the first one
        var textUpdated = false;
        var child = cont.firstChild;
        while (child != null)
        {
            if (child.nodeType == 3) //text node
            {
                if (!textUpdated)
                {
                    child.nodeValue = valueToSet;
                    textUpdated = true;
                    child = child.nextSibling;
                }
                else
                {
                    var oldchild = child;
                    child = child.nextSibling;
                    cont.removeChild(oldchild);
                }
            }
            else
            {
                child = child.nextSibling;
            }
        }

        //otherwise we set the contents of the element, removing any existing content
        if (!textUpdated)
        {
            if (typeof(cont.innerText) != 'undefined')
                cont.innerText = valueToSet;
            else if (typeof(cont.textContent) != 'undefined')
                cont.textContent = valueToSet;
        }

        //check for any masking requirements
        hyf.validation.applyMask(cont);
    }

    //final check in case this was a split date control
    if (document.getElementById(fieldName + '_container') != null)
    {
        var f = dojo.query('*[_originalFieldName=' + fieldName + ']', document.getElementById(fieldName + '_container'))[0];

        if (f)
        {
            var time = getDateFromFormat(fieldValue, f.getAttribute('_data_date_format'));
            hyf.calendar.setSplitDateControlValue(fieldName, new Date(time));
        }

    }
}